Issues 225, 226, 227 resolved with their live proofs; 232 opened and resolved

225: a grant secret is composed with the account that reads it — the node's account for a bundle, the declared secrets-owner for a container. Zero EACCES since 12:30:10 where there had been 4330, both users created, mongodb logging Authentication succeeded for each. The harness also stops calling a permanent refusal a race, which is the half that cost three hours. 226: normalising moved to the records, where the provenance is known, and a reference the sweep will not address is skipped rather than ending the sweep. The first build after the roll-out collected 200 and said 1126 remain — the backlog falls with every build instead of standing at 1681 for ever. 227: the three photo modules publish the endpoint they declare, and a catalogue-wide test makes it a rule: a container publishes only a port its module declares, or the mesh has nothing to assign and the number escapes. 232 came out from under 225: photos asked for a database its user does not live in, invisible while no user existed at all.
Issue 232: a consumer authenticates against a database its user does not live in
2026-10-04 12:37:31 +02:00 · 2026-10-04 12:33:57 +02:00 · 2026-10-04 10:29:20 +00:00 · 2026-10-04 12:29:13 +02:00 · 2026-10-04 10:25:44 +00:00 · 2026-10-04 12:23:06 +02:00
52 changed files with 3888 additions and 92 deletions
@@ -78,6 +78,12 @@ another — and a mesh you cannot name precisely is a mesh two people describe d
  mesh-scoped exclusive claim is how the mesh says "there is one of me". A foundation seat is
  named after the server it guards: the `mesh-controller`, `postgres` and `lavinmq` modules claim
  the `mesh-controller`, `mesh-store` and `mesh-broker` seats ([ADR 0079](../02-DECISIONS/0079-the-foundation-seats-are-named-after-their-servers.md)).
+- **depends on a seat** — a module needing a seat held on its node by some module, without holding
+  it. Derived from the resources it declares, never stated: a `service` depends on
+  `node-service-manager`, a `package` on `node-package-manager`, a `container` on
+  `node-container-runtime` ([ADR 0207](../02-DECISIONS/0207-a-module-depends-on-the-node-seats-that-apply-its-resources.md)).
+  Not a claim: a module **claims** a seat it holds and **declares** resources. Nothing claims a
+  package.
 - **provision** — a service one module `provides` and others `require`; the mesh resolves a provider
  and wires the two with an endpoint and a credential. A provision is a service you offer, a seat
  is a role you occupy, and the two meet where a seat delivers a provision: occupying the seat is
@@ -0,0 +1,152 @@
+---
+status: graduated
+initiated: 2026-10-04
+touches: [the bus, what a module declares, the tool runtime, the SDK, the bus grants, 03-DESIGN/01-to-be/25-the-bus-on-nats.md, 03-DESIGN/01-to-be/32-what-a-module-declares.md]
+became: [02-DECISIONS/0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md, 03-DESIGN/01-to-be/32-what-a-module-declares.md, 03-DESIGN/01-to-be/25-the-bus-on-nats.md]
+---
+
+# 024 — State a module keeps on the bus
+
+## What is investigated
+
+A place on the bus where a module's own code keeps **current state** — not history — that every
+machine sees, including a machine that joins after the state was written: put, get, delete, list and
+watch, reached through the node's runtime the way a bundle already publishes, asks and subscribes
+([ADR 0198](../../02-DECISIONS/0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md)).
+On NATS that is a key-value bucket. The questions are what a module declares, who creates the
+bucket, what the grants are, what the runtime's verbs are, and what may never be stored.
+
+## Why
+
+The mesh carries two kinds of module traffic and a third is missing.
+
+- **Events** land in the EVENTS stream: limits retention, seven days, ten thousand messages per
+  subject, a durable consumer per consuming module that replays what it missed. Never a secret
+  ([design 32](../../03-DESIGN/01-to-be/32-what-a-module-declares.md) §10).
+- **Requests** are core request/reply — tool calls, a bundle's `mesh/ask` — and are kept nowhere.
+
+Neither is *the current value of something*. Two cases from the first module that needs it, the
+operator's agent on a machine ([design 36](../../03-DESIGN/01-to-be/36-the-operators-agent-on-a-machine.md)):
+
+1. **An MCP server registered for every machine.** Registering emits an event every machine's copy
+   of the module consumes. A machine the module is assigned to *after* the registration has no
+   durable consumer yet — the consumer is created at assignment — so it never hears of it. Wanted
+   instead: one entry per server, for every machine or for one; every machine reads the whole current
+   set when it starts and watches for changes; unregistering is a delete; any machine can list it.
+2. **Which licence a machine is bound to** ([design 39](../../03-DESIGN/01-to-be/39-the-anthropic-licence-manager.md)).
+   As events, a machine that was off for a day replays every rotation since and asks for a token
+   after each. It needs only the latest binding and its generation. The token itself stays on
+   request/reply and is never stored.
+
+The design already expects this. [Design 25](../../03-DESIGN/01-to-be/25-the-bus-on-nats.md) §1:
+"conditions and observed state in key-value buckets that anything may watch".
+[Research 017](../017-a-mesh-that-heals-itself/01-the-intended-behaviour.md) wants a provisioner's
+"what I applied" and a rotation's step kept in one rather than in memory. Nothing implements it.
+
+## What exists, measured 2026-10-04
+
+| | fact | where |
+|---|---|---|
+| streams | five kinds of mesh stream: CONTROL (work queue), NODES and ASSIGNMENTS (last per subject), EVENTS (limits: 7 days, 10 000 per subject), one work queue per seat that accepts | the controller's broker streams |
+| the state relationship | [design 32](../../03-DESIGN/01-to-be/32-what-a-module-declares.md) §4 already names *state* — 1:1, last per subject — and says it is "declared: the mesh's own". Two streams use it, both written by the controller. No module can declare it | design 32, the controller |
+| key-value buckets | none, anywhere | all four code repositories |
+| the runtime's bus verbs | `mesh/publish`, `mesh/ask`, `mesh/subscribe`; delivery back to the bundle is `mesh/event` | the runtime's launcher |
+| the runtime's principal | one bus user per machine carries every assigned module; its grant is the union of theirs. That one module's code does not act as another is the runtime's to keep: it publishes under the module's own name by construction | the controller's grant composition, the runtime's bus |
+| what a bundle is issued | a membership per assignment, last per subject, read directly by the runtime: where it serves, where it emits, what it reaches | ADR 0160 |
+| who creates bus objects | the controller only — mesh streams on every raise, a seat's stream at registration, a module's consumer at assignment. No module reaches the JetStream API | design 25 §3 |
+
+### What a key-value bucket needs from a grant, against a real server
+
+Measured against nats-server 2.10 with the Go client the runtime already uses, a bucket created by
+an unrestricted user and used by two users holding only the subjects below (`B` is the bucket):
+
+| operation | subject published | writer | reader |
+|---|---|---|---|
+| bind to the bucket | `$JS.API.STREAM.INFO.KV_B` | yes | yes |
+| get | `$JS.API.DIRECT.GET.KV_B.>` | yes | yes |
+| put, delete | `$KV.B.>` | yes | **refused** |
+| list keys, watch | `$JS.API.CONSUMER.CREATE.KV_B.>` — an ordered, ephemeral consumer | yes | yes |
+| stop a watch cleanly | `$JS.API.CONSUMER.DELETE.KV_B.>` | yes | yes |
+| answers | its own inbox, which every principal already subscribes | — | — |
+
+*Checked again once built, 2026-10-04:* the grants the controller composes for two machines' runtimes —
+one carrying the owner, one only a reader — were loaded into a server as composed, and each operation
+was run as each runtime's user. The owner's did all of them; the reader's read, listed and watched,
+and its put and delete were refused by the server.
+
+Three things the measurement showed that reading the documentation would not have:
+
+1. **A refused put is not an error to the caller; it is a timeout.** The server reports the
+   permission violation asynchronously, on the connection, and the client waits out its deadline
+   for an acknowledgement that never comes. So a runtime that relies on the grant alone tells a
+   bundle "timed out" for "you may not write this" — it must refuse first, from what the module was
+   issued, with the reason.
+2. **A watch's current values include deletions.** A key deleted earlier arrives among the initial
+   values as a delete marker, before the end-of-current marker. A bundle asking "what is there now"
+   must not be handed those.
+3. **Without the consumer-delete grant, stopping a watch hangs** until its deadline, and the
+   ephemeral consumer lingers on the server until it times out by itself.
+
+### Whether the events shape is enough instead
+
+Honestly compared, because a new primitive is a cost:
+
+- **EVENTS cannot be made last-per-subject for some subjects.** Retention is per stream, and
+  JetStream refuses a second stream overlapping the first (verified and recorded in design 32 §3).
+  A state subject inside `mesh.mod.*.event.>` keeps EVENTS' seven days: a licence binding unchanged
+  for a week disappears.
+- **A separate last-per-subject stream per module** is possible — it is exactly what a key-value
+  bucket *is* on the server: a stream with one message per subject, a rollup for purge, and direct
+  reads. Building it by hand gives up the client's get, list, delete and watch, which are the
+  operations both cases need, and would be the mesh writing NATS's own key-value layer again.
+- **Consumers are the wrong reader.** A durable consumer per reading module is created at
+  assignment and replays from where it is; state wants "everything current, now, then changes",
+  which an ordered ephemeral consumer from the last value per subject gives and a durable does not.
+
+So key-value is not a convenience over events; it is the state relationship design 32 already
+names, opened to modules.
+
+## Questions, and what this effort proposes
+
+1. **What a manifest says.** `state` names the buckets a module owns, by local name — every
+   instance of the module may write them and read them. `reads` names another module's bucket as
+   `<module>.<name>`, read-only. Names only, never a bucket or subject (design 32 §1). A bucket's
+   options — how many past values it keeps, how long a value lives — are the owner's to declare,
+   the way a seat declares its own retention (design 32 §3).
+2. **Scope.** One bucket per module per name, mesh-wide. A key may carry a machine by the module's
+   own convention (`all.<server>`, `<machine>.<server>`). A bucket per machine was considered and
+   not proposed: "list every server for every machine" becomes a walk over buckets, and the grant
+   could only narrow writes, which nothing asked for — every instance of the owner already writes.
+3. **Who creates the bucket.** The controller, from the catalogue, on every raise — a bucket exists
+   from registration, like a seat's stream, so a reader can watch before the owner is assigned
+   anywhere. Never a module.
+4. **The runtime's verbs.** `mesh/state.get`, `mesh/state.put`, `mesh/state.delete`,
+   `mesh/state.keys`, `mesh/state.watch`, each naming the bucket as the module named it. A watch
+   is answered once the current values are on their way, then each change is delivered to the
+   bundle as a `mesh/state` request it answers — current values first (no deletions among them), an
+   end-of-current marker, then changes. A child that restarts watches again, as it subscribes
+   again. The runtime refuses, with the reason, a bucket the module was not issued, and a write to
+   one it only reads.
+5. **Secrets.** None in a bucket, sealed or not: a bucket is a stream (design 32 §10). Sealed values
+   are plain base64 and cannot be recognised, so the mechanical check is partial and said to be: the
+   runtime refuses a value carrying a field whose name says it is a credential (`password`,
+   `secret`, `token`, `authorization`, …), which catches the ordinary mistake and not a determined
+   one. For the first consumer this has a concrete consequence: an MCP server registered with an
+   authorisation header keeps that header out of the bucket.
+6. **History, lifetime, size.** One value per key unless the owner says more; no expiry unless it
+   says one; a value at most 256 KiB and a bucket at most 64 MiB, the mesh's caps rather than a
+   module's. **A bucket outlives its module's assignment** — what a module stored is data, and data
+   outlives what declared it ([ADR 0030](../../02-DECISIONS/0030-data-outlives-the-mesh-that-declared-it.md));
+   unassigning is not cleaning up. A bucket whose declaration is gone is reported, never removed.
+7. **Events or state.** State (above).
+
+## The work, once decided
+
+1. A decision record, then design 32 (*state* becomes a relationship a module declares) and design
+   25 (key-value buckets are part of the bus) amended.
+2. The controller: the manifest's two words and their registration check; buckets asserted on every
+   raise; the grants for owners' and readers' runtimes; the buckets issued in each membership.
+3. The runtime: the five verbs, the watch delivery, the refusals; tested against a real server.
+4. The SDK, TypeScript and Go: a small state surface over the verbs.
+5. Proved on a running mesh with one small module, then handed to the operator's agent, whose
+   registered servers move from events to a bucket.
@@ -0,0 +1,94 @@
+---
+status: graduated
+initiated: 2026-10-04
+touches:
+  - 02-DECISIONS/0174-a-node-varies-a-module-through-settings-and-kept-regions-never-an-edit.md
+  - 02-DECISIONS/0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md
+  - 02-DECISIONS/0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md
+  - 02-DECISIONS/0126-a-module-declares-its-own-seats.md
+  - 02-DECISIONS/0102-the-mesh-writes-into-a-shared-file-never-over-it.md
+  - 02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md
+  - 02-DECISIONS/0112-a-module-definition-names-no-node-mesh-or-path.md
+  - 03-DESIGN/01-to-be/27-a-module-requires-the-mesh-resolves.md
+  - 03-DESIGN/01-to-be/31-a-module-declares-its-fail2ban-jail.md
+  - 03-DESIGN/01-to-be/37-the-operators-machine.md
+  - 03-DESIGN/01-to-be/38-building-the-operators-machine.md
+  - 04-ISSUES/168-a-setting-reaches-every-file-and-contribution/00-report.md
+became:
+  - 02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md
+  - 02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md
+  - 02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md
+  - 03-DESIGN/01-to-be/41-the-shell-and-the-accounts-environment.md
+---
+
+# 025 — How a module plugs into the operator's shell
+
+## What is investigated
+
+The shell module writes the mesh's part of the account's shell startup file. But the shell is not the
+only module that needs a line there. A prompt theme loads itself from it. A language version manager
+sets a variable and sources its loader. A toolchain puts its directory on `PATH`. A desktop module
+names the browser. Today all of these sit in one hand-written file, and the shell module as written
+carries some of them in its own block and loads others only "if a module placed them". Nothing says
+how they get placed.
+
+This effort asks four things:
+
+1. **How a module contributes to the shell**: what it declares, who composes it, and in what order it
+   lands.
+2. **Where the environment lives.** Variables and `PATH` entries are facts about the account, not
+   lines of one shell's syntax. They should reach every shell (interactive or not), the login shell's
+   `execute` verb, and programs a graphical session starts.
+3. **Where the operator's own lines go,** so that assigning the shell module loses nothing the
+   machine does today.
+4. **Which part of a file the mesh owns.** ADR 0174 calls the kept region the operator's; the host and
+   to-be 38 implement the inverse (the mesh owns a marked block, and everything outside it is the
+   operator's). The record this becomes says which.
+
+## Why
+
+Rolling out the shell module (to-be 38 WP5) was stopped on 2026-10-04 after a review of what assigning
+it would do. Measured in [01](01-what-the-shell-file-holds-today.md):
+
+- Every machine carries the same predecessor-written startup file, so the module's block would be
+  appended after its own older copy and everything would run twice.
+- The block drops lines the machines rely on today.
+- Nothing installs the prompt theme or the plugins the block loads.
+- The `execute` verb runs a non-interactive login shell, which never reads the file the block is
+  written into.
+
+The operator's direction: other modules must be able to plug themselves into the shell; the prompt
+becomes its own module; assigning the shell module must lose no functionality; and the environment,
+`PATH` above all, needs an answer of its own.
+
+## What it touches
+
+- The manifest. A contribution to the shell is either a new use of the existing `contributes` /
+  `receives` pair or a new gathered field like `jails` (to-be 31).
+- The controller's composition, if the controller assembles the text.
+- The `login-shell` seat (ADR 0176): what a holder must do with what is contributed to it, and
+  whether a module or the mesh declares the seat. Possibly a new seat for the environment, beside it
+  and beside the service manager's (ADR 0177). Research 023 asks the related question of a seat
+  naming the files its holder owns.
+- ADR 0174's wording of the kept region, and ADR 0182's classification of the paths under a home.
+- The zsh module, and the modules this makes possible: an environment module, the prompt, a version
+  manager, a toolchain.
+
+## Where it stands
+
+The operator proposed a separate **environment module**: one module, holding a mesh seat of its own,
+that alone writes the account's environment. It writes a file that shells source and the service
+manager's user environment, from the variables and `PATH` entries every other module contributes to
+it. That is the starting position for the environment ([02](02-how-a-module-plugs-in.md) §1, option
+E6). It leaves the shell's contribution as shell code only (§2), addressed to the `login-shell` seat,
+which moves into the mesh's own seat set beside the new `node-environment` (§6).
+
+Graduated on 2026-10-04 with one change from the starting positions: the controller, not the
+environment module's own code, renders the environment into the module's files, so that the result
+is in the declaration before a machine applies it ([ADR 0203](../../02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md),
+option 6b).
+
+## Documents
+
+- [01 — What the shell file holds today](01-what-the-shell-file-holds-today.md): evidence.
+- [02 — How a module plugs in](02-how-a-module-plugs-in.md): the options and the starting position.
@@ -0,0 +1,103 @@
+# 01 — What the shell file holds today
+
+Measured 2026-10-04 on the four machines of one installation: two servers and two workstations. All
+four have the account's login shell set to zsh, zsh installed from the distribution, and a
+predecessor-written startup file. The predecessor is retired, so nothing manages these files any more.
+
+## The startup file is the same everywhere
+
+The account's `~/.zshrc` is **byte-identical on all four machines**: 102 lines, one checksum.
+`~/.zshrc.local`, which the last line of `~/.zshrc` sources, comes in **two variants**: one shared by
+both servers, and one shared by both workstations. So the "per-machine" part is really a
+per-*kind*-of-machine part.
+
+The predecessor produced these from one module with two *flavors*: a prompt flavor and an
+autocomplete flavor, each of which swapped in a different local file. Its install hook also:
+
+- cloned the prompt theme and three plugins from their upstream repositories into `~/.zsh/`;
+- installed fonts;
+- changed the login shell.
+
+On the workstations the theme and plugins are still on disk, left over and now owned by nothing. The
+servers have none of them.
+
+## What the 102 lines are
+
+Sorted by who should own each line once the machine is modules:
+
+| Lines today | What they are | Natural owner |
+|---|---|---|
+| `EDITOR`, `VISUAL`, `XDG_CONFIG_HOME`, `PATH` gaining `~/.local/bin` and two script directories | the account's environment | the shell's default, or the environment itself |
+| `PATH` gaining a toolchain's directory | environment, for one tool | the toolchain's module |
+| a version manager's directory variable plus sourcing its loader | environment *and* shell code | the version manager's module |
+| two variables naming the operator's own script library | environment, the operator's own | the operator |
+| a variable that turns off an agent's terminal-title handling | environment, for one tool | the agent's module |
+| the terminal title hook, keybindings, `dircolors`, the `ls`/`grep` aliases, `ll`/`la`/`l`, a container-run alias, two disk-usage functions, two port aliases | interactive shell behaviour | the shell's default |
+| the prompt's instant-prompt cache, the theme, the prompt's own configuration file | shell code, order-sensitive (instant prompt first) | the prompt module |
+| autosuggestions, syntax highlighting (and, unloaded, an autocomplete plugin on disk) | shell code, order-sensitive (syntax highlighting last) | a plugin module, or the prompt module |
+| sourcing `~/.zshrc.local` | the operator's hook | the operator |
+
+The workstation variant of the local file adds:
+
+- more environment: a desktop toolkit theme, a file manager's plugin list, `BROWSER`, `VISUAL`
+  overridden to a graphical editor, a language toolchain's binary directory on `PATH`;
+- two pieces of shell code: one that pads the prompt to the bottom of the terminal under a display, and
+  one that sources a function file another module places;
+- a hook sourcing a further per-node file.
+
+The server variant holds only that last module-placed source line.
+
+**Count:** a workstation runs 65 non-comment lines from the two files (53 shared, 12 local); a server
+runs 54. Of a workstation's 65:
+
+- about a quarter (15) are environment;
+- about half are interactive defaults no other module cares about;
+- the remaining quarter is other modules' code and hooks (a prompt, plugins, a version manager, an
+  agent's functions), loaded from the shell file only because there was nowhere else to put it.
+
+## The shell module as written
+
+The `zsh` module of to-be 38 WP5 (catalogue change, unmerged):
+
+- writes one block, appended at the end of `~/.zshrc`, holding a subset of the shared file:
+  - its environment lines, minus the toolchain directory, the version manager and the agent variable;
+  - the title hook, keybindings and the most common aliases, minus the port aliases;
+  - guarded `source` lines for the theme and two plugins *if present*;
+  - the source of `~/.zshrc.local`.
+- assigned to any of the four machines, appends that block after the identical lines already there, so
+  every line in it runs twice, `~/.zshrc.local` included.
+- on the servers, the guarded prompt lines find nothing; nothing installs the theme anywhere.
+
+## Which startup file reaches what
+
+zsh's startup order, and what each path through it reads:
+
+| started as | reads |
+|---|---|
+| interactive login (a console, ssh with a terminal) | `.zshenv`, `.zprofile`, `.zshrc`, `.zlogin` |
+| interactive non-login (a new terminal window) | `.zshenv`, `.zshrc` |
+| non-interactive login: `zsh -lc …`, what the `execute` verb runs | `.zshenv`, `.zprofile`, `.zlogin`, **not** `.zshrc` |
+| non-interactive: a script, `ssh host command` | `.zshenv` only |
+
+So an environment written into `.zshrc` reaches neither `execute` nor a script. The distribution's
+system-wide login profile, which zsh's system `zprofile` sources, only ever *appends* to `PATH` when an
+entry is missing. An entry the account's `.zshenv` puts first therefore survives a login.
+
+A graphical session's programs (a launcher, a bar, a window manager's key bindings) are started from the
+display manager and the service manager, not from a shell, and read none of these files. The service
+manager's own place for the account's environment is `~/.config/environment.d/`. Today it holds nothing
+on any of the four machines, so a program launched from the window manager does not see `PATH` entries
+that a terminal does.
+
+## What the mesh already has for "many modules, one file"
+
+Measured over the catalogue's 69 module definitions:
+
+| mechanism | used by | shape |
+|---|---|---|
+| `contributes` / `receives` | 28 contribute, 15 receive | A consumer contributes **facts** keyed by a requirement. The provider receives all of them as one file in the mesh's own format, and **renders them itself**. "The controller does not know what a reverse proxy is." |
+| `listens` / `filtering` | 40 declare listens, 1 composes | The controller derives the whole firewall rule set from every module's ports and writes it where the holder asks. |
+| `jails` / `jailing` | 3 declare, 1 composes | Each module supplies its jail **in the tool's own format**. The controller assembles them, sorted, into the one file the holder names. |
+| `into: block` on a file | 2 | One module's marked region inside a file something else owns. Text outside the region is kept byte for byte. Placement is at the end, or at the start. |
+
+None of these is a contribution of shell code or of environment today.
@@ -0,0 +1,197 @@
+# 02 — How a module plugs in
+
+Six questions, taken one at a time: the environment, shell code, the operator's own lines, order,
+who renders, and what a contribution is addressed to. Each has the options weighed and a starting
+position. The positions were set with the operator on 2026-10-04 and are what this effort tests, not
+what it has decided.
+
+## 1. The environment: variables and `PATH`
+
+A variable or a `PATH` entry is a fact about the account. It holds whichever shell is the login shell,
+and it is wanted by:
+
+- every shell, interactive or not;
+- the login shell's `execute`;
+- a graphical session's programs.
+
+[01](01-what-the-shell-file-holds-today.md) measures that `.zshrc` reaches only the first kind, and
+only interactively.
+
+| | option | for | against |
+|---|---|---|---|
+| E1 | Each module writes lines into the shell's rc file (today) | nothing new | misses `execute`, scripts and the graphical session; written in one shell's syntax, so a second shell module starts over |
+| E2 | A module contributes environment facts (a variable and its value; a `PATH` entry and its position) **to the login shell**. The holder renders them into its shell's always-read file (`~/.zshenv` for zsh) | reaches every zsh, `execute` included; a contributor names no path and no shell | the graphical session sees none of it; the environment is tied to which module holds the shell; every shell module reimplements the same rendering |
+| E3 | E2, and the service-manager holder (ADR 0177) renders the same facts a second time into `~/.config/environment.d/` | the graphical session sees the same `PATH` as the terminal | one fact set, two owners, two renderings that can disagree; the service manager's module gains a duty unrelated to managing services |
+| E4 | One composed file in `environment.d` syntax, sourced by the shell with export-all | one file, two readers | ties the shell to the service manager's syntax, which is close to POSIX assignments but not equal (its `${VAR:-default}` and quoting rules differ); a value with a space breaks one reader or the other |
+| E5 | Shells take the environment from the service manager's environment generator, which prints the merged `environment.d` | no file of the shell's at all | every shell depends on the service manager and starts a process on every start; the generator's output is unquoted, so a value with a space breaks it |
+| **E6** | **An environment module.** A module of its own (working name `node-env`) holds a mesh seat, `node-environment`, and is the only writer of the account's environment. Every module contributes its variables and `PATH` entries to that seat. The holder writes them in each reader's format: a POSIX file of `export` lines that shells source, and the service manager's `~/.config/environment.d/` | the environment no longer depends on which shell holds `login-shell`; one owner and one rendering per format, both from the same facts; the graphical session included without the service manager's module; a contributor addresses "the environment", never a shell; the `PATH` rules (order, de-duplication) live in one module's code, where a test can hold them | one more module and seat, assigned on every node beside the shell; the `login-shell` protocol gains a duty, to source the environment file, which must be written down and checked |
+
+**Starting position: E6.** It was the operator's proposal on 2026-10-04, and it replaces this
+document's first position (E2, then E3).
+
+- The facts are the contribution. Each format is rendered once, by the one module whose subject is the
+  environment.
+- A shell module's part shrinks to one line in its always-read file: `.zshenv` for zsh, sourcing the
+  environment module's POSIX file. A bash or fish module writes the same line in its own file, and no
+  contributor changes when the login shell does.
+
+Sketched, for a node with zsh, the environment module, and a toolchain:
+
+```
+toolchain ──contributes PATH entry──▶ node-environment ◀──contributes EDITOR, ~/.local/bin── zsh
+                                            │ (held by node-env)
+                         ┌──────────────────┴──────────────────┐
+                         ▼                                     ▼
+              POSIX export file                  ~/.config/environment.d/
+                         ▲                                     ▲
+            sourced from ~/.zshenv               read by the service manager
+            (every zsh, execute too)             (the graphical session)
+```
+
+The shell module still contributes its own environment (`EDITOR`, `XDG_CONFIG_HOME`, `~/.local/bin` on
+`PATH`) as a contributor like any other; it does not write those lines itself. Once issue 168 closes,
+the values a person varies become settings of whichever module contributes them (ADR 0174).
+
+## 2. Shell code: a prompt, plugins, a version manager's loader
+
+This *is* one shell's syntax, and order matters: a prompt's instant-prompt cache must run first, and
+syntax highlighting last.
+
+| | option | for | against |
+|---|---|---|---|
+| S1 | **A contribution of code for one shell** (the shell it is for, the code, a slot), gathered by the controller and placed inside the holder's block in slot order. The same shape as `jails`, which a module supplies in fail2ban's own format and the controller assembles | a contributor names no path; the order is declared and checkable; unassigning the contributor removes its code at the next composition; a node holding fish simply has no zsh code rendered, and the resolver can say so | the controller gains one more gathered field; code for a shell travels in the declaration (in the clear, so no secrets in it, as for any file) |
+| S2 | **A drop-in directory**: each module places its own `~/.zsh/rc.d/NN-name.zsh`, and the shell's block sources the directory | no controller change; each file is its module's own, removed when undeclared | every contributor hard-codes a path inside the shell module's territory, against ADR 0112's spirit; order is a naming convention nothing checks; nothing ties the file to the shell actually being zsh |
+| S3 | Contributions as facts the holder renders (`contributes`/`receives` proper) | one mechanism with question 1 | code is not a fact; the holder would only paste it, which is S1 with an extra file |
+
+**Starting position: S1.** A contribution to the shell carries **only code**, for named shells, each
+piece in a slot. Variables and `PATH` entries never go here; they go to the environment (§1). So a
+module touching both makes two contributions:
+
+- A prompt module contributes zsh code in the first slot, and its own configuration file is its own
+  owned file (ADR 0182).
+- A version manager contributes its directory variable to the environment, and its loader as code
+  for each shell it supports.
+- A toolchain contributes a `PATH` entry to the environment and nothing to the shell.
+
+What has to be settled: what each contribution is *addressed to*. Section 6 covers that.
+
+## 3. The operator's own lines: the "local override"
+
+Assigning the shell module must lose nothing the machine does today. That has two halves.
+
+**What is common is the module's default, not an override.** The startup file is identical on all four
+machines ([01](01-what-the-shell-file-holds-today.md)). A line every machine has is the shell module's
+default, or another module's contribution. It is not a local override that a person would keep in step
+on every machine by hand. Most of today's file therefore moves into the shell module's block and into
+the contributions above. Little of it stays the operator's.
+
+**What is the operator's is everything outside the mesh's block.** The host already works this way:
+
+- the mesh's region is the marked block;
+- text outside it is kept byte for byte, and checked unchanged;
+- the region is given back when the module goes.
+
+| | option | for | against |
+|---|---|---|---|
+| O1 | The mesh's block at the **start** of the file; the operator's lines after it | the operator's lines run last and win, which is what an override means; already supported (`at: start`) | a file the operator later rewrites must keep the markers; the host refuses a broken pair rather than guess |
+| O2 | A named operator region *inside* a file the mesh writes whole (ADR 0174's wording) | the file is entirely the mesh's except one hole | the opposite of what the host implements; a file a person already owns becomes the mesh's |
+| O3 | Only `~/.zshrc.local`, sourced from the block; `~/.zshrc` the mesh's whole | one obvious place | takes over a file the person owns today; ADR 0182 classifies the shell's own file as *written into*, not owned |
+
+**Starting position: O1.** `~/.zshrc.local` keeps working because the operator's own lines source it,
+not because the mesh's block does.
+
+The record this effort becomes corrects ADR 0174's description of the kept region as a **progressive
+insight**: the decision stands (a node varies a module by settings or by the operator's own lines,
+never by an edit), and only its description of which side is marked changes.
+
+**The one-off migration** is a person's act, listed in the module's documentation (ADR 0182):
+
+- remove from today's file every line the block or a contribution now carries;
+- keep the rest below the block.
+
+Until a prompt module and the other contributors exist, the lines they will carry stay among the
+operator's own. Nothing is lost at any step.
+
+## 4. Order
+
+Order matters only for code. The environment is set before any code runs, because zsh reads
+`.zshenv` first. `PATH` entries carry their own position (before or after the system's), which the
+environment module orders, not the shell.
+
+| | option | for | against |
+|---|---|---|---|
+| R1 | Numbers (`10`, `50`, `90`) | familiar | every contributor guesses a number; collisions are silent |
+| R2 | **A few named slots**, `first` / `normal` / `last`, with the module name breaking ties | the prompt says `first` and highlighting says `last` because that is what they mean; the composed result is the same bytes every time | three slots may not be enough |
+
+**Starting position: R2.** Inside the shell module's block, the order is:
+
+1. the line sourcing the environment module's file (in `.zshenv`, so it runs for every zsh; the rest
+   of this list is `.zshrc`);
+2. the `first` slot;
+3. the shell module's own defaults;
+4. the `normal` slot;
+5. the `last` slot.
+
+The operator's lines come after the block, as option O1 says.
+
+## 5. Who renders: the controller or the holder's code
+
+There are two different renderings, and E6 lets them be answered differently.
+
+**The environment** is facts rendered into two fixed formats by the one module whose subject they are.
+
+- The environment module receives the gathered contributions (the `contributes` / `receives` shape:
+  facts in the mesh's own format, rendered by the receiver).
+- Its own code writes the POSIX file and the `environment.d` file whenever what it receives changes.
+  That is ADR 0182's third class, written by the module's own process, owned by the account,
+  atomically.
+- The controller learns no shell and no service manager. The `PATH` rules (prepend or append,
+  de-duplicate, keep the system's entries) are ordinary code with ordinary tests.
+- To settle: what runs that code when the received file changes. The candidates are a host action
+  that restarts on the received file, or a subscription through the runtime (ADR 0198).
+
+**Shell code** is not facts. It is text in the shell's own syntax, assembled in slot order, which is
+what the controller already does for fail2ban jails: sort the pieces and concatenate them into the
+holder's region. The controller assembles; it never interprets the code. This keeps the shell module
+bundle-free for its files, and keeps the composed result visible in the declaration before a machine
+applies it.
+
+## 6. What a contribution is addressed to
+
+Under E6 there are two addressees: the environment and the login shell.
+
+| | option | for | against |
+|---|---|---|---|
+| A1 | **Seats**: environment facts to `node-environment`, shell code to `login-shell`. Each seat's protocol says what its holder does with what is contributed to it | a contributor depends on a role ("the environment", "the login shell"), never on zsh or on one module; works the same for any holder | `login-shell` today is declared by the zsh module itself (ADR 0126). A second shell module may only claim it, never declare it, and the seat exists only while zsh's definition is registered |
+| A2 | Requirements the modules provide (`contributes` keyed by them, as the reverse proxy is) | an existing mechanism | a contributor on a node without the provider fails to resolve, though a toolchain's `PATH` entry with no environment module is merely unwritten |
+
+**Starting position: A1, both seats in the mesh's own seat set** beside the service manager.
+
+- `node-environment` is new, and is the mesh's from the start.
+- `login-shell` moves there from the zsh module's definition. A shell is as universal a role as a
+  service manager, and a protocol that now carries duties (render the shell code contributed to it,
+  source the environment file) should not depend on one module's registration.
+
+Research 023 (a seat's protocol naming what its holder owns) is the general form of this: the
+environment seat would own the two environment files, and the login-shell seat the shell's
+startup-file region. The two efforts should not decide it twice.
+
+## Open questions
+
+- Whether a contribution may be conditional on a capability: the workstation-only environment (a
+  browser, a toolkit theme) is a desktop module's contribution, which arrives only where that module is
+  assigned. Measured, this may need nothing new.
+- What a node without the environment module does with environment contributions: refuse them at
+  resolve, or leave them unwritten and say so. The position here is to say so; a missing `PATH` entry
+  is a visible gap, not a broken machine.
+- Whether the operator's own variables (the script-library paths in [01](01-what-the-shell-file-holds-today.md))
+  are the operator's lines below the shell block, or a kept region of the environment module's file.
+  The first needs nothing new, but reaches only interactive zsh.
+- How the prompt module and a plugin module divide the plugins. Packaging decides it as much as
+  ownership: the plugins come from upstream repositories, not distribution packages, on these machines.
+- Whether the `execute` verb should read the interactive file at all once the environment is in
+  `.zshenv`. The position here is no: a non-interactive login shell plus the environment is what a
+  command needs, and the prompt's code should not run for it.
+- How a contribution reaches a second shell assigned beside the holder, which to-be 38 WP5 names as the
+  first follow-up record. Under A1 a non-holder renders nothing, so the question becomes whether a
+  non-holding shell module may render contributions for interactive use.
@@ -0,0 +1,74 @@
+---
+status: active
+initiated: 2026-10-04
+touches:
+  - 02-DECISIONS/0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md
+  - 02-DECISIONS/0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md
+  - 02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md
+  - 02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md
+  - 02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md
+  - 02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md
+  - 03-DESIGN/01-to-be/37-the-operators-machine.md
+  - 03-DESIGN/01-to-be/38-building-the-operators-machine.md
+  - 04-ISSUES/168-a-setting-reaches-every-file-and-contribution/00-report.md
+became: []
+---
+
+# 026 — The graphical session as modules
+
+## What is investigated
+
+The workstations' graphical session as modules of the mesh, at the same level as the shell
+([to-be 41](../../03-DESIGN/01-to-be/41-the-shell-and-the-accounts-environment.md)): a package, files
+under the account's home, a seat, and nothing that names a machine. The pieces are:
+
+- the login manager;
+- how a session starts and what environment it gets;
+- the display server (X today, Wayland as a sibling);
+- the window manager (i3, and sway as its Wayland sibling);
+- the terminal emulator (xterm);
+- the session's companions: bar, compositor, launcher, notifier, lock and idle, clipboard,
+  wallpaper, theming, fonts.
+
+[To-be 38](../../03-DESIGN/01-to-be/38-building-the-operators-machine.md) names this WP7, and says
+each seat begins with a record naming its holders and verbs. [To-be 37](../../03-DESIGN/01-to-be/37-the-operators-machine.md)
+§4 leaves one question for the resolver: whether a held seat can gate another's assignment.
+
+## Why
+
+The operator asked for the graphical modules next, at the shell's level, and for one consistent
+experience across machines. Since the predecessor retired, nothing manages the workstations'
+desktops. Measured in [01](01-what-the-workstations-run.md):
+
+- Two workstations carry one 983-line predecessor module's output, still byte-identical in its core.
+- One workstation also carries another machine's hardware fragments.
+- One runs a session that predates two fixes, with two notification daemons and two portals.
+- The session's environment is a hand-kept second copy of the account's, beside the one the mesh
+  now writes.
+
+## How it is approached
+
+**Adopting is also improving** (the operator, 2026-10-04). A module is not a copy of what a machine
+does today. Making it is the moment to fix what is broken, drop what is dead, choose the better tool
+and remove the leftovers. Every module's design lists its improvements over today. **Every module
+also serves tools,** many of them, for reading, acting and diagnosing; a module that only places a
+package and a file is unfinished. The tools are catalogued in
+[026/05](../026-the-graphical-session-as-modules/05-the-tools-each-module-serves.md).
+
+## What it touches
+
+- **The seat table:** up to ten node seats.
+- **The resolver:** a seat held on a node gating another module's assignment.
+- **The contribution mechanism of ADR 0204:** whether it generalises beyond shells, or whether
+  tools' own drop-in directories serve.
+- **The host's user-scoped units** (mesh-host #72, still open).
+- **Settings** for per-machine values (issue 168).
+- **ADR 0205's archive** for the two pieces the distribution does not package.
+
+## Documents
+
+- [01 — What the workstations run](01-what-the-workstations-run.md): evidence.
+- [02 — The questions and the options](02-the-questions-and-the-options.md)
+- [04 — Screensaver, displays and menus](04-screensaver-displays-and-menus.md): the lock and idle module, monitor layouts by the monitors' identity, rofi and dmenu behind one launcher seat, the clipboard, fonts
+- [05 — The tools each module serves](05-the-tools-each-module-serves.md): a first catalogue for the modules of 026 and 027
+- [03 — What the predecessor taught](03-what-the-predecessor-taught.md): its 128 modules and 3,395 commits, as patterns to keep and failures not to repeat; shared with research 027.
@@ -0,0 +1,141 @@
+# 01 — What the workstations run
+
+Measured 2026-10-04 on the two workstations of one installation, read-only: a laptop with a hybrid
+GPU and an internal panel, and a desktop with one GPU and two external monitors. Both run the same
+predecessor-generated desktop. File equality was checked by checksum across the two machines.
+
+## How a session starts
+
+The chain is the same on both:
+
+1. The login manager (`lemurs`, built from the distribution's user repository, its package now in
+   the official one) runs its X setup script on a virtual terminal.
+2. That script sources the login shell's profile files, then `~/.xprofile`, then the system's
+   `xinitrc.d` drop-ins, then merges `~/.Xresources`.
+3. `~/.xprofile` reuses the systemd user manager's bus, then sources `~/.xinitrc`.
+4. `~/.xinitrc` sets up the session and ends with `exec i3`.
+
+The login manager's own window-manager entry (`exec startx`) is never reached. Its configuration
+file uses a format two releases old, and an unmerged newer one sits beside it.
+
+**What `~/.xinitrc` does**, in order:
+
+1. Sources the system drop-ins, which import `DISPLAY` and `XAUTHORITY` into the user manager.
+2. Starts the keyring and exports its ssh socket.
+3. Exports the session's environment:
+   - `PATH`, with nine entries, one of them a directory that no longer exists;
+   - toolchain variables;
+   - `XDG_CONFIG_HOME` and `XDG_DATA_DIRS` (with flatpak);
+   - five GTK/Qt theme variables;
+   - the desktop's identity (`XDG_CURRENT_DESKTOP`, `XDG_SESSION_DESKTOP`);
+   - three of the operator's own variables.
+4. Imports an explicit allowlist of ten of those into the user manager and D-Bus activation. It is
+   never `--all`, because:
+5. a predecessor file of **secrets as environment variables** (package-registry and API tokens) is
+   sourced next.
+6. Sets the screensaver and display power timeouts, restores the wallpaper, and starts the lock
+   watcher in a respawn loop. It is deliberately not a unit, because it needs the login session.
+7. `exec i3`.
+
+**The account's environment, as of today, has three sources that disagree:**
+
+- this file, for the session;
+- the mesh's `environment.sh`, for shells
+  ([ADR 0203](../../02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md));
+- `~/.config/environment.d/`, for the user manager. It holds the mesh's `50-mesh.conf`, and a
+  predecessor file that **sets `PATH` outright** and sorts after it.
+
+## The roles, and what fills them
+
+| role | software | where configured |
+|---|---|---|
+| login manager | lemurs | `/etc/lemurs/*` (identical on both, and to the predecessor's source) |
+| session start and environment | the login manager's X setup, `~/.xprofile`, `~/.xinitrc`, `xinitrc.d`, the D-Bus import, `environment.d` | `~/.xprofile`, `~/.xinitrc`, `~/.config/environment.d/*` |
+| display server | Xorg (`xorg-server`, `xinit`, the X apps; vendor drivers per GPU) | **no** `xorg.conf.d`; monitors by `xrandr` scripts |
+| monitor layout | `xrandr` scripts (arandr), a hotplug rule on the laptop | `~/.screenlayout/`, a scripts folder, a window-manager fragment |
+| window manager | i3 4.25 | `~/.config/i3/config` and `config.d/*`, a reload watcher (user unit) |
+| bar | i3bar with i3status-rust | `~/.config/i3status-rust/*`, 14 themes, a bar watchdog (user unit) |
+| terminal | xterm (the only terminal installed) | `~/.Xresources.d/xterm`, the window manager's binding, the compositor's opacity rule |
+| compositor | picom | `~/.config/picom/picom.conf` |
+| launcher and menus | rofi | `~/.config/rofi/*`, launcher, power-menu and theme-picker scripts |
+| notifier | dunst (D-Bus activated) | `~/.config/dunst/dunstrc`, `dunstrc.d/*` |
+| lock, idle, display power | xss-lock and i3lock-color, `xset` | `~/.xinitrc`, a lock script |
+| clipboard | greenclip, xclip | `greenclip.toml` |
+| wallpaper | feh | `~/.fehbg` (points into the predecessor's tree) |
+| theming | Adwaita dark, qt5ct/qt6ct, the desktop portal (GTK backend pinned) | GTK `settings.ini`, `qt*ct.conf`, `portals.conf`, an appearance script, `.Xresources` cursor |
+| fonts | Hack and Meslo Nerd fonts in `~/.local/share/fonts` (not packaged), noto | `~/.Xresources.d/xft` (DPI fixed at 96) |
+| keyboard | nothing set; the default layout; vendor keys via triggerhappy on the laptop | window-manager bindings, `/etc/triggerhappy` |
+
+**Packages:** every piece except two is in the distribution's official repositories, and the login
+manager now is too. The two exceptions are the lock screen's colour build (`i3lock-color`) and the
+clipboard manager (`rofi-greenclip`). The Nerd fonts exist as official packages, but both machines
+carry hand-copied files instead.
+
+## Identical, different, and why
+
+**Byte-identical on both machines:**
+
+- the session files: `.xinitrc`, `.xprofile`, `.Xresources` and its drop-ins;
+- the i3 main configuration and two of its fragments;
+- the bar's top configuration and themes;
+- picom, rofi, the GTK and Qt settings, the portal configuration, the login manager.
+
+**Different, by cause:**
+
+| cause | what |
+|---|---|
+| hardware | the monitor layout script; the bar's battery block; the laptop's power and vendor-key units and udev rules |
+| misassignment | the desktop carries the **laptop's** hardware fragments: the vendor-key daemon and its triggers, the backlight rule, the brightness drop-in, a touchpad reset, and the laptop's monitor layouts, in an older version |
+| drift | the notifier's position and corner radius; a "temporary" window-manager fragment from a test; the bar watchdog disabled; a second Qt configuration tool; different font builds |
+| a stale session | the desktop's session began before two fixes, so it runs two notification daemons and two portals, and its user manager lacks the desktop's identity |
+
+**Dead references:** the window manager starts a polkit agent that is installed on neither machine,
+so there is no polkit agent at all. `PATH` names a directory that does not exist.
+
+**Per-machine values inside shared files:**
+
+- the DPI;
+- absolute home paths, in the clipboard configuration and the flatpak data directories;
+- the laptop's panel name, inside a fragment both machines carry.
+
+## User units the desktop needs
+
+| unit | does | laptop | desktop |
+|---|---|---|---|
+| reload watcher | reloads the window manager and bar when their files change | on | on |
+| bar watchdog | restarts a dead bar | on | off |
+| clipboard daemon | from its package | via the window manager | unit **and** window manager |
+| vendor power profile, memory guard | laptop power | on | — |
+
+None is managed. Applying them as the account needs the host's user scope
+([ADR 0177](../../02-DECISIONS/0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md)),
+which is still an open change.
+
+## The predecessor's module
+
+One manifest of 983 lines covers the window manager, bar, launcher, notifier, compositor, lock
+screen, session bootstrap, theming and scripts. It:
+
+- has four *flavors*: i3, laptop (i3 plus the monitor wizard and hotplug), desktop (i3 plus
+  nothing) and a laptop model (laptop plus vendor keys);
+- has about **105 theme variables** substituted into templates: border, gaps, fonts, workspace
+  names, every colour of bar, launcher, notifier and lock screen, compositor opacity, cursor, idle
+  times, Qt and GTK theme names;
+- enables the two user units from an install hook.
+
+Separate modules held the login manager and the display server (one flavor, `xorg`, with a comment
+calling `wayland` "the intended sibling"). The shell module held no graphical part.
+
+## Wayland and sway
+
+**Nothing exists.** There is no compositor, no sway configuration, no Wayland session entry, and the
+login manager's Wayland directory is empty. What is installed is libraries:
+
+- Wayland itself and the Qt Wayland plugins, which other packages pull in;
+- `xwayland`, explicitly installed and required by nothing;
+- on the desktop, an orphaned compositor library from another desktop environment, and that
+  environment's portal backend, pulled in by a game launcher. The portal configuration pins
+  against it.
+
+Every piece a sway session needs is in the official repositories: the compositor, its lock screen,
+a terminal (`foot`), a bar (`waybar`), a notifier (`mako`) and `xwayland`.
@@ -0,0 +1,123 @@
+# 02 — The questions and the options
+
+Seven questions. Each has its options and a starting position, which is what this effort tests, not
+what it has decided.
+
+## 1. How finely the desktop splits into modules
+
+| | option | for | against |
+|---|---|---|---|
+| G1 | One desktop module, as the predecessor had | one assignment | flavors again, per machine; ADR 0174 refuses them, and the evidence shows a flavor landing on the wrong machine |
+| G2 | **One module per piece of software:** `lemurs`, `xorg`, `i3`, `i3status-rust`, `xterm`, `picom`, `rofi`, `dunst`, `xss-lock` with the lock screen, `greenclip`, `feh`, a theme module, a fonts module | each is what it declares; a machine gets exactly what is assigned; the same split already works for the shell and its plugins | about thirteen assignments per workstation |
+| G3 | G2, plus a named **set** the controller assigns as one (for example *the X desktop*) | G2's precision with G1's convenience | a set is a new controller concept |
+
+**Starting position: G2.** Whether a set is worth a record is left until the thirteen assignments
+have been done by hand once.
+
+## 2. The seats
+
+Research 018 listed the candidates. ADR 0204 has since put the login shell in the mesh's own set,
+because a role with a protocol should not depend on one module's registration. The same reasoning
+applies here:
+
+| seat | holders | protocol, first verbs |
+|---|---|---|
+| `node-login-manager` | lemurs, greetd | which sessions it offers, the default session |
+| `node-display-server` | xorg, sway | `displays`, `layout` |
+| `node-display-session` | i3, sway | `reload`, `workspaces`, `windows` |
+| `node-terminal-emulator` | xterm, foot, alacritty | which terminal `$TERMINAL` names; `open` |
+| `node-bar`, `node-compositor`, `node-launcher`, `node-notifier`, `node-lock-screen`, `node-clipboard` | the pieces above, and their Wayland counterparts | one verb or none each, until a use asks for one |
+
+**A compositor that is its own server holds two seats.** Sway is both the display server and the
+display session. A module may claim several seats, so this needs nothing new.
+
+**Starting position:** the first four seats are in the mesh's own set. The companion seats are
+added only as each holder is written; for those, a module without a seat is acceptable at first.
+
+## 3. One module requiring another seat to be held
+
+i3 needs an X server held on its node, and sway needs nothing below it. A terminal needs a session.
+To-be 37 left open how that is said.
+
+| | option | for | against |
+|---|---|---|---|
+| R1 | A seat **delivers a provision** (`x11-display`, `wayland-display`) and a module requires it at node scope. The seat table has a `delivers` field already, and requirements already resolve | existing machinery; the refusal names the seat and its possible holders, which design 27 already lists | a node-scoped requirement that never crosses machines has to be stated as such |
+| R2 | A new field, *needs the seat X held* | reads plainly | a second way to say what R1 says |
+| R3 | Nothing; assign carefully | — | the mistake the evidence shows (a laptop's fragments on a desktop) is exactly an unchecked assignment |
+
+**Starting position: R1.** `xorg` and `sway` each deliver what they serve. `i3`, `picom` and `xss-lock`
+require `x11-display`. `foot` requires a Wayland display, and xterm requires an X one, which a Wayland
+session gives through `xwayland`.
+
+## 4. Who starts the session, and with what environment
+
+Today `~/.xinitrc` is a hand-kept second environment and the session's whole start script.
+
+| | option | for | against |
+|---|---|---|---|
+| S1 | The display server's module writes `~/.xinitrc` **into**: a mesh block at the start that sources the account's environment (`environment.sh`), merges the X resources, and runs the session's contributed start lines. The session holder's module contributes its `exec` line. The operator's lines stay after the block | one environment for shells, the session and the user manager; nothing to keep in step | the order inside `.xinitrc` becomes the slot order of a contribution (question 5) |
+| S2 | The login manager's module owns the session script under `/etc` | system scope; no home file | the environment is the account's, and the script is the same for every account |
+| S3 | Leave `.xinitrc` the operator's | nothing to build | the third environment stays |
+
+**Starting position: S1.**
+
+- The desktop's identity (`XDG_CURRENT_DESKTOP`) and the theme variables become **environment
+  contributions** (ADR 0203) from `i3` and from the theme module. They then also reach the user
+  manager through `environment.d`, which replaces most of today's allowlist import.
+- The secrets file stays out of the environment until research 027 settles how a secret reaches an
+  account.
+
+## 5. How other modules contribute to a holder's file
+
+The terminal's settings are X resources. A bar, a launcher binding and a hardware module's key
+bindings are window-manager configuration. Autostarts are the session's. ADR 0204 built slot
+contributions for shells only.
+
+| | option | for | against |
+|---|---|---|---|
+| C1 | **The tool's own drop-in directory**, where it has one: i3's `include`, dunst's `dunstrc.d`, X resources' `#include`, XDG autostart entries, `environment.d`. Each contributor owns its own file there | no mesh change; the tools already read these directories; unassigning removes the file | each contributor names a path in another tool's directory (ADR 0204 rejected this for shells, where no drop-in convention exists); ordering is by file name |
+| C2 | **ADR 0204's mechanism generalised:** `contributes` text *for a format* (`zsh`, `xresources`, `i3`, `xinitrc`) in a slot, placed by the holder's placeholder | one mechanism, checked by the controller, order declared | every format must be named in the controller; a bigger change to ADR 0204 |
+| C3 | C1 where the tool has a drop-in convention, C2 where it does not (`.xinitrc`, `.Xresources` order) | uses each tool's own grain | two mechanisms to learn |
+
+**Starting position: C3**, with the boundary drawn by the tools. A tool that reads a directory gets
+drop-ins. A file without one gets slots. This means amending ADR 0204's "shell" to "a format", which
+is a progressive extension rather than a reversal.
+
+## 6. What varies per machine
+
+| what | today | option |
+|---|---|---|
+| monitor layout | per-machine `xrandr` scripts, monitor names baked in | a **setting** of `xorg` (issue 168), and a `layout` verb of the display server seat |
+| DPI, fonts' size | fixed in an X resource | a setting |
+| battery block, vendor keys, brightness, touchpad | a laptop model's flavor | **a hardware module** per machine model, contributing its window-manager fragment, bar block and udev rules. The desktop simply is not assigned it |
+| theme (the 105 variables) | template substitution | settings of each tool's module, after issue 168 closes (ADR 0174). Until then each module carries today's values as its default |
+
+**Starting position:**
+
+- Hardware modules for what follows the machine.
+- Defaults now, settings after issue 168, for what the operator varies.
+- The monitor layout waits for settings. Until then it is an operator-owned script the display
+  server's block calls if present.
+
+## 7. Wayland and sway
+
+Nothing of a Wayland session exists, and every piece is officially packaged. "Wayland" is a protocol,
+not a piece of software, so it has no module of its own. Its parts are `sway` (server and session),
+`swaylock`, `foot`, `waybar`, `mako`, and `xwayland` for X clients.
+
+**Starting position:**
+
+- The seats and the requirements (questions 2 and 3) are designed so that sway fits from the first
+  day.
+- The X stack is built first, because it is what runs.
+- `sway` and its companions are written after that, and proven on one workstation as a second
+  session the login manager offers beside i3. That lets the operator try it without losing the
+  working desktop.
+
+## Prerequisites this effort cannot remove
+
+- **User-scoped units** (mesh-host #72) for the reload watcher and the bar watchdog.
+- **Settings** (issue 168) for monitors and theme values.
+- **The two packages not in the official repositories:** the lock screen's colour build and the
+  clipboard manager. Each is ADR 0205's case, a pinned archive, or a choice of an official
+  alternative (`i3lock` without colours; `clipmenu`/`cliphist`).
@@ -0,0 +1,51 @@
+# 03 — What the predecessor taught
+
+A study on 2026-10-04 of the retired predecessor:
+
+- its 128 module manifests, their hooks, its installer and its sync engine;
+- 3,395 commits of history;
+- what it left on four machines.
+
+This document holds what bears on the graphical session and on the system layer
+([research 027](../027-the-system-layer-as-modules/00-overview.md)). The evidence is in the
+predecessor's history. A commit is cited here by what it fixed, not by its hash, because the
+repository is private.
+
+## Keep: what worked
+
+| pattern | where it shows | in the mesh |
+|---|---|---|
+| ownership marked inside the file: inside the markers is reconciled, outside is kept verbatim | a block marker in a shared file, after an engine that rewrote whole files | kept regions (ADR 0174, ADR 0204) |
+| two writers get two files and an `include`, the include first | the ssh client's configuration, after two writers fought over one file | ADR 0203's two files; research 026 C1 |
+| one writer per file, one authority per action | only the reload watcher restarts the window manager, after three mechanisms each did | ADR 0182 |
+| refuse to write when the source of truth is unreadable; never empty a block because a query found nothing | a block of names was emptied by a failed query | — keep |
+| an unresolved template variable fails the install | a literal unfilled path was installed green | [issue 231](../../04-ISSUES/231-a-misspelled-placeholder-is-written-out-as-text/00-report.md): the mesh still has this gap |
+| prune only what you can prove you placed | stale files from earlier deliveries | ADR 0189 |
+| ensuring never rotates a credential | a silent rotation caused a retry storm, a ban of the shared address and a lost registry | ADR 0114 |
+| vendor only the files you use; never clone and link | three files instead of 77 MB | ADR 0205 |
+| copy, never symlink | a recursive delete followed a link, and every reinstall failed | ADR 0012 |
+| verification says what it did not check | a verifier said *clean* while the secret was still on disk | — keep |
+| alert once per condition | 411 alerts hid a 28-hour outage | ADR 0090 |
+
+## Do not repeat
+
+| failure | what it did | the mesh instead | where the mesh is still exposed |
+|---|---|---|---|
+| **Flavors** | variant files and packages per machine type: a gate dropped, the first-seen variant won, packages never installed, the verifier ignored the gate. On the day of the study a desktop carried a laptop model's fragments | one module per piece, assignment per machine (ADR 0174, research 026 §1) | a setting that switches which whole file is rendered is a flavor under another name |
+| **The freeze** | existing values outranked new defaults; templated files were rendered once (*copy if absent*) | files are generated (ADR 0011) | a created-once file (ADR 0087) is a deliberate freeze, and a push must say *kept* |
+| **Adopting drift** | a *merge* strategy made a local edit the record forever; switching strategies clobbered a person's model choice | nothing is read back (ADR 0174) | an edit outside a kept region is overwritten **silently**. The predecessor's *why is this back* loop: the push should name what it overwrote |
+| **Environment templating** | `${VAR}` matched any name; unresolved names stayed literal; comments and destination paths were interpolated | namespaced placeholders; `$` forbidden in contributed values (ADR 0203) | issue 231 |
+| **Hooks with privilege** | install hooks ran `sudo`, `chsh`, `systemctl`, `git clone` and `curl`, and swallowed failures into a warning | the `user` shape, the service shape, archives (ADR 0176, 0177, 0205) | the agent module writes under `/etc` from its own tool through `sudo` (no keep-original, no give-back); the prompt's helper downloads itself unpinned; that the operator escalates without a prompt is assumed by three modules and declared by none (research 027) |
+| **Secrets in environment files** | `.env` files left world-readable; the decryption key beside what it decrypts; a deleted secret stayed in the file, so rotation was a no-op | the vault (ADR 0113, 0114) | a predecessor file of secrets is still sourced into the graphical session on two machines (research 027 Q2) |
+| **Symlinks into a home** | a system file linked into a person's home | ADR 0012 | on the control machine, a fail2ban action file is still a predecessor link into its home tree. Deleting that tree would silently break the repeat-offender jail. The mesh's fail2ban module must own it as a file first |
+| **Green while broken** | a recorded version frozen for four months; a verifier passing what it skipped | ADR 0134, 0145, 0184 | issue 230: a plan waiting for ever reads as healthy |
+
+## What it means here
+
+- **Research 026:** the desktop's 88 flavor-gated files and 92 theme variables are the flavor and
+  templating failures in one module. Question 1 (one module per piece) and question 6 (hardware
+  modules, settings later) are the answer, and nothing in the new modules may switch whole files on a
+  setting.
+- **Research 027:** the hooks that installed the AUR helper, enabled the login manager and changed
+  shells are what the `package`, `service` and `user` shapes replace. Every remaining `sudo` in a module's
+  own code is a debt to be named, starting with the agent module.
@@ -0,0 +1,129 @@
+# 04 — Screensaver, displays and menus
+
+Three areas the operator named on 2026-10-04, as their own modules. Each sharpens a row of
+[01](01-what-the-workstations-run.md) and a question of [02](02-the-questions-and-the-options.md).
+
+## The screensaver: idle, lock and display power
+
+**Measured on both workstations:**
+
+- **Idle and lock** are three things wired by hand in the session's start script:
+  - the X screensaver timeout (`xset s 1800`);
+  - the display power timeouts (`xset dpms`);
+  - `xss-lock` running the colour build of `i3lock` through a wrapper, in a respawn loop.
+- **A second screensaver,** xscreensaver, is installed and deliberately not started. Earlier it
+  overrode the display power settings with its own, and locked nothing. Its configuration file is
+  still in the home.
+- **The lock screen's 20-odd colours and formats** were predecessor theme variables.
+- **The colour build is not in the official repositories** (research 026/01).
+
+**Starting position:**
+
+- **One module for the lock screen,** holding `node-lock-screen`: the locker and its wrapper as the
+  module's own files, the screensaver and display power timeouts, and `xss-lock`.
+- The timeouts and colours are its defaults, and settings later (issue 168).
+- The colour build ships as ADR 0205's pinned archive, or the module uses the official `i3lock`.
+  That is the operator's choice, and the colours are the only difference.
+- xscreensaver is not a module; its package and file are removed.
+- `xss-lock` needs the logind session, so it stays a session-start line contributed into
+  `.xinitrc`'s block (question 4), not a unit.
+
+## Monitor layout (xrandr)
+
+**Measured:**
+
+- Each workstation has a layout script generated by `arandr`, with the monitor names baked in. One
+  workstation also has several layouts for named places, a hotplug rule and a wizard.
+- **The desktop carried the laptop's layout scripts.**
+- No `xorg.conf.d`, and no layout tool beyond the scripts.
+
+**Starting position: `autorandr`** (official repositories) inside the display server's module.
+
+- `autorandr` saves a layout as a profile **keyed by the connected monitors' identities** (their EDID)
+  and applies the matching one at login and on hotplug.
+- Profiles therefore need no machine's name. A profile can be shared mesh-wide and simply never
+  matches on a machine without those monitors. That is exactly the "say it by what is there, never by
+  a name" rule (ADR 0112).
+- The profiles are the operator's data, saved by the tool itself, so they are *found* (ADR 0182). A
+  `layout` verb on `node-display-server` lists, saves and applies them.
+- The arandr scripts and the hotplug rule retire once a profile exists for each.
+
+## Menus: rofi and dmenu
+
+**Measured:**
+
+- rofi is the launcher, the power menu, the theme picker and the clipboard menu.
+- The operator's scripts call `rofi -dmenu` in four places and **plain `dmenu` in two. dmenu is
+  installed on neither workstation, so those two fail.**
+
+**Starting position:**
+
+- **`rofi` holds `node-launcher`**, and the seat's protocol includes a **dmenu-compatible command**:
+  read choices on standard input, print the chosen one. Scripts call that command, not a program by
+  name.
+- **`dmenu` is a module of its own** (official repositories), able to hold the same seat on a machine
+  that wants it, for instance a Wayland session where `wofi` or `fuzzel` would hold it instead.
+- The rofi module carries its theme files, and the menus that belong to other modules arrive as those
+  modules' scripts:
+  - power menu → the session;
+  - clipboard menu → the clipboard module;
+  - theme picker → settings, once issue 168 closes.
+
+## The clipboard: xclip and greenclip
+
+**Measured:**
+
+- **greenclip** keeps the clipboard's history, and rofi shows it on a key binding.
+- **greenclip is not in the official repositories.**
+- It is started two ways: the window manager's configuration starts it on both workstations, and on
+  one a user unit is enabled as well.
+- Its configuration names an absolute home path.
+- **xclip** (official) is the command-line clipboard the operator's scripts use.
+
+**Starting position:**
+
+- **`xclip` is a module of its own,** a package and nothing else. It is the tool scripts depend on,
+  and a module that needs it requires it.
+- **The clipboard manager holds `node-clipboard`:** its daemon, started once by the session (a session
+  contribution, or a user unit once user-scoped units ship, never both), its configuration with no
+  absolute path, and its menu binding contributed to the window manager.
+- **Which manager holds it is the operator's choice:**
+  - greenclip, as today, shipped under ADR 0205;
+  - or `clipmenu` (official), which feeds the same dmenu-compatible command as the launcher seat above,
+    and needs no archive.
+- **On Wayland** the same seat is held by `cliphist` with `wl-clipboard`, both official.
+
+## Fonts
+
+**Measured:**
+
+- The fonts the desktop uses are **hand-copied files** in the account's font directory, not packages:
+  - a Nerd font for the window manager, the bar and the terminal;
+  - a second one for the prompt;
+  - on one workstation, the same four files twice, once under URL-encoded names;
+  - on the other, a different build of the same font and three more copied from a theme's repository.
+- The system's default monospace is a different font (`Noto Sans Mono`), so anything that asks for
+  `monospace` gets another face than the terminal.
+- The DPI is fixed in an X resource.
+- **Every Nerd font in use is in the official repositories** (Hack, Meslo, Iosevka, JetBrains Mono).
+
+**Decided** (the operator left the choice open, except that it must not be today's Hack):
+
+| role | face | why |
+|---|---|---|
+| monospace: terminal, window manager, bar, launcher, prompt | **JetBrains Mono Nerd Font** | built for long reading in a terminal, unambiguous `0O1lI`, optional ligatures; a version-3 Nerd font, so every icon the prompt and bar use is present |
+| interface: GTK, Qt, notifications | **Inter** | designed for screens, clear at small sizes |
+| icons missing from any face | Nerd Fonts Symbols | a fallback, so a font without icons still shows them |
+| emoji | Noto Color Emoji | |
+| serif and every other script | Noto | |
+
+All five are official packages.
+
+**Starting position:**
+
+- **A `fonts` module:** those packages, and a fontconfig file it owns that maps `monospace`, `sans-serif`,
+  `serif` and the emoji and symbol fallbacks to the chosen faces, so every program agrees.
+- The terminal, bar, launcher and prompt modules name the family, not a file.
+- The DPI becomes the display server's setting (issue 168).
+- The copied files are removed by the operator once the packages are in (ADR 0182).
+- Fonts are not a seat: several coexist. The module owns the one place where *the* default is said.
@@ -0,0 +1,77 @@
+# 05 — The tools each module serves
+
+A first catalogue for the modules of research 026 and 027, as the operator asked: "all kinds of useful
+tools for all these modules". Each tool is served by the node's runtime (ADR 0175), on the machine the
+module runs on. Through discovery (ADR 0195) it is reachable from any machine as
+`<machine>/<module>.<tool>`, or as `<machine>/<seat>.<verb>` where a seat defines it.
+
+**Conventions:**
+
+- **(r)** reads.
+- **(a)** acts on the machine, escalating where it must, as the packet filter does (to-be 38 WP4).
+- **(d)** is a desktop act that needs the operator's session.
+- A tool that changes something a module declares says so in its answer: the next push restores the
+  declaration.
+- Every tool answers structured data, not prose (issue 229).
+- **Seat verbs** (marked *seat*) are the protocol every holder of that seat serves. The rest are the
+  module's own.
+
+## The graphical session (026)
+
+| module | tools |
+|---|---|
+| `xorg` (*node-display-server*) | *seat* `displays` (r: outputs, modes, rates, connected monitors with their identity) · *seat* `layout` (r/a: list, save, apply an autorandr profile) · `set-mode` (a: one output's resolution, rate, rotation, scale) · `primary` (a) · `dpi` (r/a) · `input-devices` (r) · `input-set` (a: touchpad tap, natural scroll, pointer speed) · `keyboard` (r/a: layout and options) · `screenshot` (d: one screen or all, as a file) · `x-log` (r: the server's errors since start) |
+| `i3` (*node-display-session*) | *seat* `reload` (a) · *seat* `workspaces` (r) · *seat* `windows` (r: tree with classes, titles, workspaces) · `focus` (d: window or workspace) · `move` (d: window to workspace or output) · `layout-save` / `layout-restore` (d: a workspace's arrangement) · `exec` (d: start a program in the session) · `kill` (d) · `bindings` (r: every key binding and what it runs) · `config-check` (r: validate the composed configuration before a reload) · `marks` (r) · `scratchpad` (d) |
+| `sway` (*node-display-server*, *node-display-session*) | the same seat verbs over Wayland, plus `outputs` (r) and `idle-inhibitors` (r) |
+| `lemurs` (*node-login-manager*) | *seat* `sessions` (r: what the login screen offers) · *seat* `default-session` (r/a) · `logins` (r: who logged in when, from the journal) |
+| `xterm` (*node-terminal-emulator*) | *seat* `open` (d: a terminal, optionally running a command, in a directory) · `font` (r/a: face and size) · `colours` (r) |
+| `i3status-rust` (*node-bar*) | *seat* `reload` (a) · `blocks` (r: what the bar shows and each block's current value) · `block-run` (r: run one block once and answer its output) · `themes` (r) |
+| `picom` (*node-compositor*) | *seat* `restart` (a) · `rules` (r: opacity, shadow and blur rules in force) · `window-opacity` (d) · `toggle` (d: compositing off and on, for a game or a test) |
+| `rofi` (*node-launcher*) | *seat* `menu` (d: show a list, answer the chosen line: the dmenu-compatible command as a tool) · `applications` (r: the desktop entries it would offer) · `themes` (r) · `run` (d) |
+| `dmenu` (*node-launcher*) | *seat* `menu` (d) |
+| `dunst` (*node-notifier*) | *seat* `send` (d: title, body, urgency, actions) · *seat* `history` (r) · `pause` / `resume` (d: do not disturb) · `close-all` (d) · `rules` (r) · `count` (r: shown, waiting, history) |
+| lock module (*node-lock-screen*) | *seat* `lock` (d) · `idle` (r/a: screensaver and display power timeouts) · `inhibit` (d: keep the screen on for a while) · `locked` (r: is the session locked now, and since when) |
+| clipboard manager (*node-clipboard*) | *seat* `history` (r: entries, newest first, length-limited) · *seat* `copy` (d: put text on the clipboard) · `paste` (r: what the clipboard holds now) · `clear` (d) · `delete` (d: one entry) |
+| `xclip` | `copy` (d) · `paste` (r): the plain clipboard without a manager |
+| `feh` (wallpaper) | `set` (d: an image, per output) · `current` (r) |
+| `fonts` | `families` (r: installed faces) · `match` (r: what `monospace`, `sans-serif` and `emoji` resolve to) · `glyph` (r: which installed font has a given character) · `cache-rebuild` (a) |
+| theme module | `appearance` (r/a: dark or light, for GTK, Qt and the portal at once) · `cursor` (r/a) · `icons` (r) · `portal-check` (r: which portal backend answers which interface) |
+| `gnome-keyring` (*node-secret-service*) | *seat* `unlocked` (r) · `lock` (d) · `collections` (r: names and item counts, never secrets) · `ssh-keys` (r: what the agent holds, by fingerprint) |
+| desktop hardware module (laptop) | `brightness` (r/a: panel and keyboard) · `battery` (r: charge, health, cycles, limit) · `charge-limit` (r/a) · `gpu-mode` (r/a: integrated, hybrid, discrete) · *seat* `profile` (r/a: quiet, balanced, performance) · `thermals` (r: temperatures and fan speeds) · `power-draw` (r) |
+
+## The system and the account (027)
+
+| module | tools |
+|---|---|
+| `docker` (*node-container-runtime*, ADR 0166) | *seat* `list`, `inspect`, `logs`, `stats`, `start`, `stop`, `restart` (r/a) · `images` (r: with size and which container uses each) · `prune` (a: dangling images, stopped containers not held by the mesh, build cache, with a dry run first) · `disk-usage` (r) · `networks` (r) · `volumes` (r: with what mounts each and whether the mesh holds it) · `events` (r: the last hour) · `daemon-config` (r) |
+| `docker-compose` | `projects` (r: compose projects running and where their files are) · `up` / `down` / `restart` (a: one project, by directory) · `logs` (r) · `ps` (r) |
+| `sudo` | `rules` (r: what the account may run, without a prompt and with one) · `check` (r: does the escalation the mesh relies on work here) |
+| `pacman` | `search` (r) · `installed` (r: with version and explicitly or as a dependency) · `info` (r) · `owns` (r: which package owns a path) · `files` (r) · `updates` (r: what an upgrade would change) · `upgrade` (a: with the news first) · `orphans` (r) · `remove-orphans` (a) · `cache` (r/a: size, clean to the last N versions) · `history` (r: installs and upgrades from the log) · `mirrors` (r/a: rank and refresh) · `news` (r: distribution news since the last upgrade) |
+| AUR (package repository, 027 question 1) | `search` (r) · `build` (a: on the build machine, into the mesh's repository) · `outdated` (r) · `published` (r) |
+| `snapd`, `flatpak` | `list` (r) · `install` / `remove` (a) · `update` (a) · `runtimes` (r) · `disk-usage` (r) |
+| `time-sync` | `status` (r: synchronised, offset, server) · `servers` (r) · `sync-now` (a) |
+| `localization` | `get` (r: locale, time zone, keymap) · `time-zone` (r/a) · `locales` (r) |
+| `kernel` | `running` (r: version, command line, uptime) · `installed` (r) · `modules` (r: loaded, with what uses them) · `reboot-needed` (r: a newer kernel or library than the one running) · `microcode` (r) · `boot-entries` (r) · `initramfs-rebuild` (a) · `dmesg` (r: errors since boot) |
+| `logrotate` | `status` (r: last rotation per log) · `force` (a: one configuration) · `big-logs` (r: the largest logs on the machine) |
+| `avahi` | `browse` (r: services on the local network) · `resolve` (r) |
+| `cups` | `printers` (r) · `queue` (r) · `cancel` (a) · `print` (a: a file to a printer) · `default` (r/a) |
+| `bluetooth` | `devices` (r: paired, connected, battery where reported) · `connect` / `disconnect` (a) · `scan` (r) · `power` (r/a) |
+| `ssh-client` (owns `~/.ssh`) | `hosts` (r: every `Host` and where it came from: the mesh, a module, the operator) · `check` (r: modes, keys without a passphrase, keys unused for a year, stale `known_hosts` entries) · `authorized` (r: who may log in, by fingerprint and comment) · `revoke` (a: one authorized key, into the operator's region) · `known-host` (r/a: verify, refresh one host's key) · `test` (r: can this machine reach a host and authenticate, batch mode) |
+| `sshd` | `sessions` (r: who is logged in, from where) · `config-effective` (r: `sshd -T`) · `failed-logins` (r: since a time, with fail2ban's verdicts) |
+| scripts modules | `list` (r: each script with its one-line description) · `run` (a: one script by name with arguments, as the account, bounded like `execute`) · `which` (r: which module ships a command) |
+| `node-env` (*node-environment*) | `show` (r: every variable and `PATH` entry with the module that contributed it) · `diff` (r: what a shell actually has versus what the mesh composed) |
+| `zsh` (*node-login-shell*) | *seat* `execute` · `zsh_config` (r) · `history-search` (r: the account's history, by pattern) · `functions` (r: aliases and functions in force, with where each came from) · `startup-time` (r: how long an interactive shell takes to start, per slot) |
+| `memory-pressure` | `status` (r: memory, swap, compressed swap ratio, pressure stall) · `top` (r: the largest processes) · `oom-history` (r: what was killed, when) |
+| `zfs` | `pools` (r: health, capacity, fragmentation) · `datasets` (r) · `snapshots` (r/a: list, create, destroy by name) · `scrub` (r/a: status, start) · `errors` (r) · `arc` (r: cache statistics) |
+| `nfs-server`, `samba` | `exports` / `shares` (r) · `clients` (r: who has it mounted now) · `reload` (a) |
+| `nfs-client`, `smb-client` | `mounts` (r: each share, mounted or not, and since when) · `mount` / `unmount` (a) · `test` (r: is the server reachable, is the export offered) |
+| hosts-file holder (*node-hosts-file*, ADR 0199) | *seat* `entries`, `add`, `remove` |
+| `vnstat`, `lm_sensors` | `traffic` (r: per interface, day, month) · `sensors` (r) |
+| mail consumer (future effort) | `accounts` (r) · `search` (r) · `unread` (r) · `read` (r: one message) · `mark` (a) · `send` (a) |
+
+## What this catalogue is for
+
+It is a starting list, not a contract. A tool becomes a contract only when it is a seat's verb, and
+each seat's verbs are decided in that seat's record (ADR 0132). A module's own tools can grow freely.
+Every row above is a tool the operator would otherwise run by hand over ssh. That is the measure of
+whether one is worth writing.
@@ -0,0 +1,64 @@
+---
+status: active
+initiated: 2026-10-04
+touches:
+  - 02-DECISIONS/0165-container-runtime-is-what-a-machine-can-run-and-a-running-runtime-is-its-holders-health.md
+  - 02-DECISIONS/0166-the-container-runtime-is-a-node-seat-and-the-host-creates-containers-through-its-holder.md
+  - 02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md
+  - 02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md
+  - 03-DESIGN/01-to-be/37-the-operators-machine.md
+  - 03-DESIGN/01-to-be/38-building-the-operators-machine.md
+became: []
+---
+
+# 027 — The system layer as modules
+
+## What is investigated
+
+What runs on the machines below the operator's home and outside the mesh's own services, and which
+of it should be modules. That covers:
+
+- the container runtime and its tools;
+- privilege (sudo);
+- the package manager and the software it cannot install;
+- time, locale, the kernel and boot;
+- log rotation;
+- the machine-specific daemons the workstations and servers carry: printing, bluetooth, VPN
+  clients, virtualisation, storage, sharing.
+
+## Why
+
+The operator asked for the system level beside the graphical session. In particular:
+
+- a `docker` module (decided in principle by the proposed ADRs 0165 and 0166, never built);
+- a `docker-compose` module for development work, assigned **only to the two workstations**.
+
+Measured in [01](01-what-the-machines-run.md): on four machines, almost nothing at this level is
+owned by a module. The pieces differ by machine for no recorded reason. Three findings are security
+matters on their own.
+
+## How it is approached
+
+**Adopting is also improving** (the operator, 2026-10-04). A module is not a copy of what a machine
+does today. Making it is the moment to fix what is broken, drop what is dead, choose the better tool
+and remove the leftovers. Every module's design lists its improvements over today. **Every module
+also serves tools,** many of them, for reading, acting and diagnosing; a module that only places a
+package and a file is unfinished. The tools are catalogued in
+[026/05](../026-the-graphical-session-as-modules/05-the-tools-each-module-serves.md).
+
+## What it touches
+
+- **The container runtime seat** (ADRs 0165 and 0166, both proposed).
+- **The host's `package` shape**, which installs from the distribution's official repositories only,
+  while the workstations carry 67 and 114 packages from elsewhere.
+- **How a secret reaches the account's environment.** ADR 0203 forbids it in the contributed
+  environment, but a predecessor file supplies such secrets today.
+- **The facts the mesh assumes and never declares,** above all that the operator account escalates
+  without a prompt.
+
+## Documents
+
+- [01 — What the machines run](01-what-the-machines-run.md): evidence.
+- [02 — Candidates and questions](02-candidates-and-questions.md)
+- [03 — The account's own tools](03-the-accounts-own-tools.md): `~/.ssh` as one module's, scripts on every machine, the keyring, the laptop's power management, mail as events
+- The predecessor's lessons, shared with research 026: [026/03](../026-the-graphical-session-as-modules/03-what-the-predecessor-taught.md)
@@ -0,0 +1,103 @@
+# 01 — What the machines run
+
+Measured 2026-10-04 on four machines, read-only, including the host's own record of what it applied:
+two servers (the anchor and a home server) and two workstations (a laptop and a desktop). "Owned"
+means a module the mesh assigns declares it.
+
+## The container runtime
+
+| | anchor | home server | laptop | desktop |
+|---|---|---|---|---|
+| docker | 29.8.2 | 29.8.2 | 29.7.2 | 29.7.2 |
+| compose | 5.5.1 | 5.6.0 | 5.5.0 | 5.5.0 |
+| buildx | 0.37.2 | — | — | — |
+| podman | — | 6.1.3 | 6.1.0 | 6.1.0 |
+| `docker.socket` | disabled | enabled | enabled | enabled |
+| `containerd.service` | disabled | disabled | disabled | **enabled** |
+| `daemon.json` beyond the shared keys | direct routing, two more insecure registries | log rotation (100 MB × 10) | — | — |
+| docker group | operator, **a CI user** | operator | operator | operator |
+
+**Ownership:**
+
+- The `docker` package is owned on one machine only, by the installer's bootstrap, not by a module.
+- `docker.service` is declared indirectly, by the name resolver and the private-network modules,
+  which each merge their own keys into `daemon.json`.
+- Nothing owns the socket, containerd, compose, buildx or the group.
+
+**Compose in use:**
+
+- On the servers, no running container belongs to a compose project. Their compose files are
+  pre-mesh trees under the operator's and root's homes, plus a dangling enabled unit for one of them.
+- On the workstations, compose runs development stacks, and pre-mesh service trees sit under a
+  top-level directory.
+
+The mesh marks its own containers with a host label. On the workstations, a handful of unlabelled
+development and test containers run beside its build agent.
+
+## Privilege
+
+- The operator account escalates **without a prompt on all four machines**. The mesh relies on this,
+  but it is set by hand in `/etc/sudoers` (a `wheel` rule on two machines, the account named on
+  two), and nothing declares it.
+- On the anchor, a **CI user from the predecessor** keeps passwordless sudo and docker membership,
+  and a predecessor drop-in in `sudoers.d` survives.
+- On the desktop, the operator account is also in the **`root` group**.
+
+## The package manager
+
+- `pacman.conf` is stock except on one server (parallel downloads).
+- The mirror list was generated once by a tool that is no longer installed. On the anchor, it is the
+  hosting provider's single mirror.
+- An AUR helper is installed everywhere.
+- **Packages from outside the official repositories:** 2 on the anchor, 21 on the home server,
+  67 on the laptop, 114 on the desktop. They include:
+  - the agent CLI, which a catalogue module declares as a package and the host cannot install;
+  - a VPN client;
+  - a remote-access client;
+  - printer drivers;
+  - GPU tools;
+  - a kernel module built from source (DKMS) for a storage filesystem;
+  - a snap daemon.
+
+## Time, locale, kernel, boot
+
+| | anchor | home server | laptop | desktop |
+|---|---|---|---|---|
+| time zone, keymap | **another zone**, a non-US console keymap | local zone, unset | local zone, unset | local zone, unset |
+| time sync | timesyncd plus a provider drop-in | timesyncd | timesyncd | **ntpd**, timesyncd disabled |
+| bootloader | grub (BIOS) | systemd-boot **and** grub | systemd-boot | systemd-boot **and** grub |
+| kernels | one | two, plus a DKMS filesystem module | one | one, plus a DKMS controller driver |
+| microcode | **none** | yes | yes | **none** |
+| swap | RAID partition | partition | zram, a file and a partition | partition |
+| log rotation timer | not found | enabled | not found | not found |
+
+## Daemons and services no module owns
+
+- **All four:** avahi.
+- **Workstations:**
+  - a VPN client daemon (both);
+  - virtualisation (incus) with a hand-made unit that inserts container-runtime firewall rules (both);
+  - printing and bluetooth;
+  - GPU and power tuning per model;
+  - a remote-access daemon (laptop);
+  - snap and flatpak (desktop);
+  - the local model server, run from a hand-written unit although a catalogue module for it exists
+    (desktop);
+  - Samba sharing and a network filesystem mount from the home server (desktop). A second mount is
+    failing, and its **credential is written in clear in `/etc/fstab`**.
+- **Servers:**
+  - a storage pool (about 167 TB) with its import, mount and scrub units, an NFS server and Samba
+    sharing (home server);
+  - traffic and sensor monitoring (home server);
+  - a DHCP client daemon the catalogue has a module for but does not assign there (home server);
+  - cron, an entropy daemon, and the **legacy `iptables` services**, which run beside the mesh's own
+    filter (anchor).
+- **Not found anywhere:** a backup agent, a monitoring agent, a second VPN mesh.
+
+## What is plain debris
+
+- Dangling enabled-unit links on three machines.
+- Predecessor blocks in `/etc/hosts` on both servers.
+- The CI user, and the predecessor sudoers drop-in, on the anchor.
+- Pre-mesh compose trees on the anchor, the home server and the desktop.
+- Unlabelled test containers on the workstations.
@@ -0,0 +1,128 @@
+# 02 — Candidates and questions
+
+## Decided by the operator on 2026-10-04
+
+- **`docker`** holds the container runtime seat on every machine, as ADRs 0165 and 0166 propose. Those
+  records are promoted from proposed when it is built.
+- **`docker-compose` is a module of its own,** the distribution's package and nothing else. It is
+  assigned **only to the two workstations**, for development work. The servers run nothing through
+  compose.
+
+Later the same day, on the candidates below:
+
+- **Yes, all of them:** `docker`, `docker-compose`, `sudo`, `pacman`, an AUR helper (question 1),
+  `time-sync`, `kernel` (with boot and microcode), `logrotate`, `avahi`, `cups` with the printer's
+  driver, and every server-only candidate.
+- **Locale, time zone and keymap are one module, `localization`.**
+- **`snapd` and `flatpak`** are modules, on the two workstations only.
+- **`incus` is the lab's,** whose module depends on it. It is not a module of its own beside the lab.
+- **The agent's and the local model server's modules are still being developed,** and are not
+  assigned until they are.
+- **The predecessor's CI user is retired.** It was removed from the anchor the same day, with its
+  sudoers line, its docker membership and a dangling unit link; the backup is on the machine.
+
+## Candidate modules
+
+**On every machine:**
+
+| module | owns | first reason |
+|---|---|---|
+| `docker` | the packages (runtime, containerd), the service and socket, `daemon.json`'s base keys (live restore, log rotation), the docker group's members | four machines, four configurations, one owner on one |
+| `sudo` | the operator account's escalation as a drop-in, declared | the mesh's tools rely on it (to-be 38 WP4) and nothing states it |
+| `pacman` | `pacman.conf`'s few keys, the mirror list and its refresher, cache cleaning | mirrors generated once and never again |
+| `time-sync` | timesyncd and its drop-ins | two daemons across four machines |
+| `localization` | locale, time zone, console keymap (one module, the operator's choice) | one machine differs, with no record why |
+| `kernel` | the kernel packages, microcode, initramfs presets | two machines without microcode |
+| `logrotate` | the timer and the base configuration | rotation runs on one machine of four |
+| `avahi` | the daemon and name-service switch entry | on all four, owned by none |
+
+**On the workstations only:**
+
+- `docker-compose`;
+- `lemurs`, the login manager (research 026);
+- a VPN client module;
+- `incus` with its forward unit (the lab module declares the package on one workstation only);
+- `cups` with the printer's driver;
+- `bluetooth`;
+- per-model **hardware** modules: GPU, power, vendor keys, brightness. These are the same modules
+  research 026 needs for the desktop's fragments.
+
+**On the servers only:**
+
+- `zfs` with its scrub timer, and the long-term kernel it builds against;
+- `nfs-server`;
+- `samba`;
+- `vnstat`, `lm_sensors`.
+
+`cron` on the anchor serves one stock file and can go. So can the entropy daemon on a modern
+kernel.
+
+**Retire, not model:** the legacy `iptables` services on the anchor. They duplicate the mesh's
+filter, which is ADR 0100's ground.
+
+## Questions this effort has to answer
+
+1. **Software outside the official repositories.** The host's `package` shape installs from the
+   official repositories only. A catalogue module already declares an AUR package (the agent CLI),
+   which no machine could install, and the workstations carry 181 such packages between them.
+
+   | | option | for | against |
+   |---|---|---|---|
+   | P1 | ADR 0205's pinned vendored archive, per piece | exists | wrong for packages that build native code or kernel modules |
+   | P2 | **The build machine builds AUR packages into a package repository the mesh serves** from its artifact store. The host then installs them as packages, signed | one shape for every package; pinned, reviewed and built once | a repository to serve and a signing key to keep |
+   | P3 | An AUR helper on each machine, driven by the host | nothing to serve | builds on every machine, unpinned: the predecessor's `git clone` in another form |
+
+   Starting position: P2, for anything with native code. ADR 0205 stays for plain files such as a
+   theme.
+
+2. **Secrets in the account's environment.** A predecessor file feeds package-registry and API tokens
+   to the session. ADR 0203 refuses secrets in contributed values, because they travel in the clear.
+   The candidate is ADR 0182's third class: a module's own process writes a mode-0600 file of
+   exports, from secrets the vault hands it over the bus, and the shell and the session source it.
+   This needs its own record.
+
+3. **Per-machine sizing and drivers.** The swap layout, the GPU, the storage pool and the boot
+   loader are facts of one machine's hardware. They belong in hardware modules, or in settings
+   (issue 168), not in the shared ones.
+
+4. **What a module may leave behind.** Compose is installed on both servers, unowned. The mesh
+   removes nothing it did not make. The choice is between an operator's one-off removal and a
+   server-side `absent` declaration.
+
+5. **The hosts file.** ADR 0199 (decided on an open change, not yet merged)
+   gives `/etc/hosts` to one module through a seat, `node-hosts-file`, with an operator region and
+   three verbs. It is not built. Today the private network's foundation writes only its own block, and
+   the rest of each file is a predecessor's stale blocks (both servers) or the operator's development
+   names (both workstations). The candidate module is that seat's first holder. It takes the
+   private-network block as a contribution, and its operator region replaces the hand-kept lines.
+
+6. **Mounts.** The host has no shape for a filesystem mount; ADR 0091 is about what a container
+   mounts. One workstation mounts a share of the home server over NFS, and a second share over SMB.
+   That second one fails, and its credential sits in clear in `/etc/fstab`.
+
+   | | option | for | against |
+   |---|---|---|---|
+   | M1 | **A module owns `/etc/fstab`** and other modules contribute lines | one file, as people know it | the file also carries the root and boot filesystems the installer wrote, which no module should rewrite; a slot contribution into a file that can stop a machine booting |
+   | M2 | **Each client module writes its own systemd mount (and automount) unit**, which is the service manager's drop-in for exactly this. The `nfs-client` or `smb-client` module declares the unit file and the service shape enables it. `/etc/fstab` stays the machine's | no new host shape, and no shared file; the unit names its own dependencies (network online, the private network) and an automount does not hang a boot when the server is away; unassigning removes the mount | a mount reads as a unit, not a line |
+   | M3 | A new `mount` shape in the host | the host knows what a mount is | a second way to say what M2 says |
+
+   Starting position: **M2.** The credential an SMB mount needs is a secret, written by the module's
+   own process from the vault, mode 0600, which is question 2's mechanism. The pair is a server
+   module exporting (`nfs-server`, `samba`) and a client module mounting. The client requires the
+   share the server provides, so the mount is resolved, not hand-typed.
+
+7. **Two DHCP clients on one interface.** The home server runs `dhcpcd`, a DHCP *client* (no machine
+   runs a DHCP server), next to the network manager, which is its assigned networking module. Both
+   lease an address on the same interface, which therefore carries two LAN addresses. The catalogue's
+   `dhcpcd` module is assigned nowhere, and this unit is a leftover. The network manager is the
+   machine's one DHCP client, and `dhcpcd` should be disabled there.
+
+## Security findings, independent of any module
+
+1. A filesystem credential in clear text in a workstation's `/etc/fstab`, for a mount that is failing
+   anyway.
+2. A predecessor CI user with passwordless sudo and docker membership on the anchor, and a
+   predecessor sudoers drop-in. *The user was removed on 2026-10-04; the drop-in remains.*
+3. The operator account in the `root` group on one workstation.
+
+Each is one small change. None waits for a module.
@@ -0,0 +1,169 @@
+# 03 — The account's own tools: ssh, scripts, mail
+
+Three further directions from the operator on 2026-10-04. Each is account-level, like the shell
+([to-be 41](../../03-DESIGN/01-to-be/41-the-shell-and-the-accounts-environment.md)).
+
+## `~/.ssh` is one module's
+
+*"A module owns `~/.ssh`, so it is its responsibility that every folder is set up consistently and
+correctly."*
+
+**Measured:**
+
+- The catalogue's `ssh-client` module owns the directory (mode 0700) and one region of
+  `~/.ssh/config`: a `Host` block per machine of the mesh. It owns nothing else.
+- On one workstation, a predecessor's header, `Include` and hand-written host block sat **above** the
+  mesh's region. ssh takes the first match, so the predecessor's entries were the ones in force, for
+  the same machines. Removed on 2026-10-04.
+- On the control machine, two keys of a retired CI system were still in the operator's
+  `authorized_keys`, able to log in as the operator. Removed the same day.
+- Permissions differ by file and by machine. Backups of the configuration lie beside it.
+
+**Starting position:** `ssh-client` becomes the holder of everything under `~/.ssh`, classified as
+ADR 0182 asks:
+
+| path | class | how |
+|---|---|---|
+| `~/.ssh/`, its mode, every file's mode | owned | the directory resource, plus a check verb that reports a file with the wrong mode |
+| `~/.ssh/config` | written into, the mesh's block **at the start** | the mesh's hosts win; the operator's lines after it are kept; an `Include config.d/*` line in the block |
+| `~/.ssh/config.d/<module>` | owned by the contributing module | ssh's own drop-in: a work module adds its forge's host there (research 026 C1) |
+| `~/.ssh/authorized_keys` | written into, the mesh's block | the operator's keys as the mesh records them, and nothing a retired system left. The operator's own lines are kept below the block |
+| `~/.ssh/known_hosts` | written into, the mesh's block | every mesh machine's host key, so the first connection never asks |
+| private keys | found | never read and never written by the mesh; a key the mesh should hand out comes from the vault, through the module's own process (ADR 0182, third class) |
+
+The sshd module is the other half: the machine's side. It is already in the catalogue.
+
+## Scripts on every machine, shared and machine-specific
+
+*"All nodes should get some custom scripts, both node-specific and mesh-specific (shared)."*
+
+**Measured:** the operator's script folder holds 64 entries plus 33 in its `bin/`. It is under no
+version control, and exists only where it was copied. It mixes three kinds:
+
+1. scripts belonging to a module (the desktop's watchers, lock, menus; a laptop model's brightness);
+2. the operator's own tools;
+3. installers that modules have replaced.
+
+**Starting position:**
+
+- **The operator's scripts live in a repository of their own,** registered as any application is
+  ([ADR 0015](../../02-DECISIONS/0015-applications-live-in-their-own-repository.md)), built as archives,
+  unpacked into a directory the module owns under the home. `bin/` goes on `PATH` through an
+  environment contribution ([ADR 0203](../../02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md)),
+  and small functions go into the shell through a `shell` contribution
+  ([ADR 0204](../../02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md)).
+- **"Machine-specific" is said by assignment, never by naming a machine**
+  ([ADR 0112](../../02-DECISIONS/0112-a-module-definition-names-no-node-mesh-or-path.md)). One repository
+  holds several modules:
+  - `scripts` (shared, on every machine);
+  - `scripts-workstation`;
+  - `scripts-media`;
+  - and so on, each assigned where it applies.
+
+  A script that belongs to a piece of software or hardware moves into that module instead. A flavor
+  inside one module is what [research 026/03](../026-the-graphical-session-as-modules/03-what-the-predecessor-taught.md)
+  says not to repeat.
+- **A script can also be a tool.** A script with a one-line description is served by the node's
+  runtime, so it can be called through the mesh on any machine that has it.
+- A script that needs a secret gets it through question 2's mechanism, never from a file of
+  environment secrets.
+
+## The keyring
+
+*"A keyring is also a good thing to create a module for."*
+
+**Measured on the two workstations, which both run GNOME Keyring:**
+
+- **On one, the keyring unlocks at login.** The login manager's PAM service includes `login`, which
+  carries `pam_gnome_keyring`.
+- **On the other, it does not.** The PAM line is only in the screensaver's service, so at session
+  start the window manager runs a script that asks for the password a second time and unlocks the
+  keyring with it.
+- **On both, the session's start script starts the daemon again** with the ssh and gpg components,
+  and exports the ssh agent's socket. The keyring's current release serves the ssh agent through a
+  separate per-user socket unit instead.
+
+**Starting position:** a `gnome-keyring` module that holds a node seat, `node-secret-service` (the
+holder of the desktop's secret service; a password manager could hold it instead). It declares:
+
+- the package;
+- its lines in the login manager's PAM file, written into, never over (ADR 0102), so login unlocks it
+  on every machine;
+- the ssh agent's user socket, once user-scoped units ship;
+- the agent's socket path as an environment contribution, which needs a machine fact for the
+  account's runtime directory. ADR 0203 forbids `$` in values, so `$XDG_RUNTIME_DIR` cannot be
+  written in one.
+
+The second unlock prompt and the second daemon start go away.
+
+## Mail as events
+
+*"Ideally a mail consumer with all my mail accounts configured, so my mail is recorded in the bus."*
+
+**Measured:**
+
+- The predecessor polled one work mailbox every minute. It **read an access token out of the mail
+  client's process memory**, called a mail API with it, and raised a desktop notification per unread
+  message. It worked only while the mail client ran, and stopped silently when the predecessor's units
+  were retired.
+- Two further predecessor modules served mail tools, for one provider and for IMAP.
+- The mesh runs a mail server of its own for its domains.
+
+**Not decided here; it needs an effort of its own.** The questions it would have to answer:
+
+- **Accounts and how each authenticates:**
+  - IMAP with an app password;
+  - a provider's OAuth with a registered application;
+  - the mesh's own mail server, which can publish delivery itself.
+
+  An employer's tenant may forbid registering an application at all.
+- **What the bus records:**
+  - headers and a summary as events;
+  - bodies and attachments in an object store the event points at;
+  - retention, since mail is the most personal data the mesh would hold.
+- **What consumes it:** a notifier bridge to the desktop (the predecessor's notifications), search,
+  an agent's context.
+- **Where it runs:** one long-running module, not per machine (ADR 0198).
+
+The obvious first step is the mail server the mesh already runs.
+
+## Power management on the laptop
+
+*"Power management for the laptop."*
+
+**Measured on the laptop** (a gaming model with a hybrid GPU):
+
+- **The platform profile is driven by a vendor daemon** (`asusd`) and its CLI. The vendor CLI is
+  now in the official repositories; the copy installed came from elsewhere. A predecessor script
+  runs as a user unit and switches the profile every five seconds: quiet on battery, balanced on
+  mains, performance above 50 % CPU.
+- **The hybrid GPU's mode** (now hybrid) is held by a second vendor daemon (`supergfxd`), which is
+  **not** in the official repositories. Kernel-module options for the discrete GPU's power state
+  and its suspend, hibernate and resume units are set by hand. Its own power daemon is masked.
+- **The battery charge limit is 80 %,** set by the vendor daemon.
+- **The lid and power key suspend.** The brightness key is ignored by logind and handled by the
+  vendor-key path. Both are logind drop-ins.
+- **Memory pressure:** compressed swap in RAM (`zram`) beside a swap file and a partition;
+  `systemd-oomd` with drop-ins; a predecessor *memory guard* user unit that notifies before the OOM
+  killer acts.
+- `upower` runs. There is no `power-profiles-daemon`, `tlp`, `auto-cpufreq` or `thermald`, so nothing
+  competes with the vendor daemon, by design.
+
+All of it came from two predecessor modules, one of which was a laptop-model *flavor*. A desktop
+received part of it (research 026/01).
+
+**Starting position:**
+
+- **A hardware module per machine model** (here, the laptop's model). It holds the vendor daemon and
+  its profile configuration, the GPU mode daemon (ADR 0205's case, or the build machine's package
+  repository of research 027 question 1), the discrete GPU's module options and suspend units, the
+  logind drop-ins, the battery charge limit, and the vendor keys and brightness. It is assigned to
+  the one machine of that model, and to any second one later.
+- **The profile switching** moves from a polling script to the module's own long-running code
+  (ADR 0198). It reacts to the power-supply change event instead of polling, and its thresholds
+  become settings (issue 168).
+- **Memory pressure is not the laptop's alone.** `zram` and `systemd-oomd` with the notifier are a
+  `memory-pressure` module, assigned wherever wanted. The swap layout stays the machine's (`kernel`
+  module, question 3).
+- A **`node-power-profile`** seat (vendor daemon, or `power-profiles-daemon` on other hardware)
+  gives the mesh one verb, `profile`, the same on every machine that has one.
@@ -9,6 +9,8 @@ extends: 02-DECISIONS/0011-managed-files-are-generated-never-edited.md

 # 174. A node varies a module through settings and kept regions, never through an edit

+> **The mechanism changed — 2026-10-04, by [ADR 0204](0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md).** Where this record calls a kept region *a marked block in which the operator's own lines are kept*, read the inverse, which is what the host built: the mesh's region is the marked block, and every line outside it is the operator's, kept byte for byte and given back when the module goes. The decision stands: a node varies a module by settings and by the operator's own lines, never by an edit.
+
 ## Context

 [ADR 0011](0011-managed-files-are-generated-never-edited.md) says a managed file is derived and an
@@ -9,6 +9,8 @@ extends: 02-DECISIONS/0132-a-seat-carries-the-tools-its-holder-must-serve.md

 # 176. The login shell is a node seat held by one shell module, and `execute` is its contract

+> **The mechanism changed — 2026-10-04, by [ADR 0204](0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md).** The seat is no longer declared by the shell modules (§1). It is `node-login-shell`, in the mesh's own seat set, which a shell module claims. Its holder also places the shell code other modules contribute, and sources the account's environment ([ADR 0203](0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md)). What stands: one holder per node, the login shell set by the `user` shape and given back, `execute` as the contract, and any node may call it.
+
 ## Context

 [ADR 0040](0040-what-a-module-is.md) names the shell as its example of a *shared* seat: bash, zsh
@@ -9,6 +9,12 @@ extends: 02-DECISIONS/0112-a-module-definition-names-no-node-mesh-or-path.md

 # 181. The operator account is a node fact, and a home is a placement root

+> **Progressive insight — 2026-10-04.** This record called a resource under a home *home-scoped*, and a
+> module that places one a *home-scoped module*. There is no such kind of module
+> ([ADR 0173](0173-the-operators-machine-is-the-meshs-and-a-module-is-what-it-declares.md) §2: a module is
+> what it declares), so the three places now say *a resource placed under a home* and *a module placing
+> files under a home*. What was decided is unchanged.
+
 *Reconstructed. The controller shipped this on 2026-09-27 and
 [to-be 29](../03-DESIGN/01-to-be/29-a-node-has-operator-accounts.md) recorded it as built without a
 decision behind it. This record states what was decided, from the code and the design, and adds the
@@ -35,7 +41,7 @@ its home; the account and its home are machine facts a definition may name in a
 and content; a roster file may say it lives under the home, and is then rendered per node, placed under
 that node's account's home, owned by the account, and left out on a node with no account. On
 2026-10-02 **all four nodes of the live mesh carry an empty account**: the fact exists and nobody has
-stated it, so no home-scoped resource can land anywhere yet.
+stated it, so no resource placed under a home can land anywhere yet.

 ## Considered Options

@@ -68,7 +74,7 @@ account. A definition names the account and its home as machine facts, never as
 may say it is a home file and is then placed and owned the same way. The controller resolves both at
 composition, and the host chowns what it creates.

-**A node with no account cannot carry a home-scoped resource, and says so.** A roster fact that lives
+**A node with no account cannot carry a resource placed under a home, and says so.** A roster fact that lives
 under the home is left out of that node's declaration rather than written to nowhere. A resource naming
 the account fact on such a node is refused at composition, naming the fact the machine does not have.
 A module that writes a person's files is thereby unassignable to a machine with no person on it, which
@@ -80,7 +86,7 @@ anything.

 ## Consequences

- **The operator states the account before any home-scoped module lands.** Today none is stated, so the
+- **The operator states the account before any module placing files under a home lands.** Today none is stated, so the
  first assignment of such a module begins with four node records.
 - The roster carries each node's account, so a composed ssh configuration logs in as the right person
  on every machine — the gap that surfaced this, closed by the same fact.
@@ -9,6 +9,12 @@ extends: 02-DECISIONS/0118-undeclaring-gives-a-unit-back-the-state-it-was-found-

 # 182. Inside a home, the mesh owns the directory and the files it places, writes into the tool's own files, and holds everything else as found

+> **Progressive insight — 2026-10-04.** This record said *a home-scoped module* and *the family of
+> home-scoped modules*. There is no such kind of module
+> ([ADR 0173](0173-the-operators-machine-is-the-meshs-and-a-module-is-what-it-declares.md) §2), and the rule
+> is about a directory under a home, whichever module declares it; the three places now say so. The
+> decision, its options and its consequences are unchanged.
+
 ## Context

 [ADR 0181](0181-the-operator-account-is-a-node-fact-and-a-home-is-a-placement-root.md) lets a module
@@ -35,7 +41,7 @@ use tools that no longer exist. Nothing owns them; nothing will ever rewrite or
 `~/.ssh`: the mesh owns the directory and the files it places; it holds the person's private keys and
 personal drop-ins as found. That was argued from the lockout `~/.ssh` can cause. The argument here is
 the same shape with a different stake — the person's work rather than the person's way in — and it has
-to hold for every directory the family of home-scoped modules will touch, so it is a rule, not a
+to hold for every directory under a home that any module will touch, so it is a rule, not a
 section.

 ## Considered Options
@@ -52,7 +58,7 @@ section.

 ## Decision

-**A home-scoped module owns the directory it declares: its existence, owner and mode.** The host creates
+**A module that declares a directory under a home owns that directory: its existence, owner and mode.** The host creates
 it if absent, owned by the account, and never removes it while it holds anything
 ([ADR 0030](0030-data-outlives-the-mesh-that-declared-it.md)). Inside it, every path the module touches
 is in exactly one of four classes, and **the class is visible in the definition from the shape
@@ -105,7 +111,7 @@ finished its definition.
 | An owned file found with no record is kept once, then written | host tests of ADR 0102's kept-original rule |
 | Only the declared keys of a written-into file change, and are given back | host tests of ADR 0102: declared keys set, the rest kept, restored when undeclared |
 | Nothing found is touched | the family's lab check: a machine with a seeded home holding a person's file beside a predecessor's; after apply the person's file is byte-identical, the predecessor's is kept as the original, the mesh's keys are set and the person's keys in the same file remain; after unassign the mesh's files are gone, the keys are restored, the person's files are untouched and the directory stands |
-| Every path a home-scoped module touches is classified | a catalogue review rule for this family: each path is a directory, a file, a file written into, a secret-and-step, or absent — the first module written to it is [to-be 36](../03-DESIGN/01-to-be/36-the-operators-agent-on-a-machine.md) |
+| Every path a module touches under a home is classified | a catalogue review rule for this family: each path is a directory, a file, a file written into, a secret-and-step, or absent — the first module written to it is [to-be 36](../03-DESIGN/01-to-be/36-the-operators-agent-on-a-machine.md) |

 ## References

@@ -152,6 +152,30 @@ the node is bound to, and refuses with a notification otherwise.
 | An unservable binding refuses rather than lends | a manager test: a worker bound to a dead licence is answered with a refusal, never another licence's token |
 | A switch through the console changes the token on the node and nothing in the answer is a token | a live check on one workstation |

+> **The mechanism changed — 2026-10-03, by [ADR 0193](0193-every-bundle-the-runtime-serves-is-launched-and-the-runtime-knows-no-language.md)
+> and [ADR 0198](0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md).**
+> What stands: one manager holding the seat, one rotation source, a token sealed to the receiving
+> module's key on request/reply and never an event, the agent module alone writing what the agent
+> reads, the identity guard, the host knowing nothing. What moved: both modules' code is bundles the
+> node's runtime launches over stdio and is the bus for — `mesh/ask` for a call made on the module's
+> behalf, `mesh/publish` and `mesh/subscribe` beside it — so neither holds a bus credential of its own.
+> The manager's refresh and visits are a long-running bundle the control node's runtime launches. And,
+> by the operator's direction, **the manager starts every exchange**: it asks each bound node's agent
+> module for its public key, hands it a token, asks it for a login waiting to be adopted, and reconciles
+> every node on a schedule — which is what "the agent module asks the seat for its current token" and
+> "offers the grant to the manager" in the decision above now mean in practice. The agent module could
+> ask through its runtime; it does not need to.
+
+> **The mechanism changed — 2026-10-04, by [ADR 0206](0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md).**
+> What stands: the manager holding the seat, one rotation source, the grants encrypted in its store, a
+> token sealed to the receiving module's key on request/reply and never an event, the agent module alone
+> writing what the agent reads, the identity guard, bindings as a person's act. What moved: the dated note
+> above — the manager no longer starts every exchange. Each node reports what it holds as state, without
+> the secret; the manager asks a node for its grant only when a report shows one it does not hold, adopts
+> a licence by refreshing it rather than into a licence configured beforehand, and keeps what each
+> consumer should hold as state, from which the node fetches its token by request. The rotation and switch
+> events are gone.
+
 ## References

 - [ADR 0024](0024-model-access-is-a-provision.md), [ADR 0050](0050-model-access-is-vendor-agnostic.md) — the licence as a named thing, the carve-out this moves with the manager
@@ -107,6 +107,16 @@ unreferenced.
 - The store is briefly unavailable each night, for as long as collection takes. Everything that
  pulls from it retries; nothing in the mesh treats a momentary store as a failure
  ([ADR 0185](0185-a-control-plane-behind-its-seats-row-serves-what-it-can.md)).
+- **An apply arriving during the window reopens it**, because the host's rule for a container it
+  finds stopped is to replace it, and `while-stopped` is the first thing that makes a stopped
+  container intentional. Found by reading this before it merged, recorded as
+  [issue 224](../04-ISSUES/224-an-apply-reopens-a-maintenance-window-by-recreating-what-it-held-still/00-report.md)
+  rather than fixed here: the two candidate fixes — the window takes the apply lock, or the apply
+  learns which containers are held — are each a decision with its own cost, and neither belongs
+  inside this record. Nothing is worse than it was; the store has never collected at all.
+- **The sweep is bounded**: at most two hundred artifacts and sixty seconds per build, stopping at
+  the first refusal, because it runs inside somebody's build. What is left over is offered again
+  next time. The store stops growing from the first sweep; it does not empty in one.

 ## How this is checked

@@ -0,0 +1,106 @@
+---
+topic: what runs on it
+status: accepted
+date: 2026-10-04
+deciders: jochen
+reconstructed: false
+extends: 02-DECISIONS/0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md
+---
+
+# 201. A module keeps its current state in key-value buckets it declares, and reaches them through the runtime
+
+## Context
+
+A module's code reaches the bus through the node's runtime: it publishes events, subscribes to them
+and asks tools ([ADR 0198](0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md)).
+Events are kept for a week and replayed to a consumer that was away; requests are kept nowhere. What
+neither gives is **the current value of something**, seen by every machine, including one that joins
+after it was written. The first module to need it — the operator's agent on a machine — registers MCP
+servers for every machine as events, and a machine assigned later never hears of them; and it would
+replay a week of licence rotations where it needs only the binding that holds now. Research
+[024](../01-RESEARCH/024-state-a-module-keeps-on-the-bus/00-overview.md) measured the alternatives and
+the grants against a real server.
+
+[Design 32](../03-DESIGN/01-to-be/32-what-a-module-declares.md) §4 already names *state* as one of the
+mesh's relationships — 1:1, last per subject — and reserves it to the mesh's own declarations.
+[Design 25](../03-DESIGN/01-to-be/25-the-bus-on-nats.md) §1 expects key-value buckets on the bus.
+
+## Considered Options
+
+1. **Key-value buckets a module declares, created by the controller, reached through the runtime.**
+   Chosen.
+2. **State as events on EVENTS, read last-per-subject.** Rejected: retention is per stream and EVENTS
+   keeps seven days, so a value unchanged for a week disappears; a second stream over the same subjects
+   is refused by the server (design 32 §3). And events give no get, list or delete.
+3. **A last-per-subject stream per module, written by hand.** Rejected: it is what a key-value bucket
+   is on the server, without the client's get, list, delete and watch — the mesh writing NATS's
+   key-value layer again.
+4. **State in a module's own files or database, shared by asking a tool.** Rejected for state every
+   machine must see: a machine joining later has to know whom to ask and poll, and an owner that is
+   down answers nothing — the property the bus exists to remove.
+
+## Decision
+
+**1. A module declares its state by name.** `state` names the buckets it owns, by local name; every
+instance of the module may write and read them. `reads` names another module's bucket as
+`<module>.<name>`, read-only. A bucket's options are its owner's: how many past values a key keeps,
+and how long a value lives. A manifest names no bucket, stream or subject (design 32 §1).
+
+**2. One bucket per module per name, mesh-wide.** A key may name a machine by the module's own
+convention; the mesh does not scope buckets per machine.
+
+**3. The controller creates the buckets, from the catalogue, on every raise** — from registration,
+like a seat's stream, so a reader can watch a bucket whose owner is not yet assigned anywhere. A module
+never creates one. The runtime's grant on each bucket is the union of what its carried modules may do:
+an owner's instances write and read, a reader's read.
+
+**4. Each assignment is issued its buckets in its membership** ([ADR 0160](0160-the-mesh-issues-an-assignments-subjects-and-a-runtime-serves-what-it-is-issued.md)),
+by the name the module uses for each and whether it may write. The runtime serves `mesh/state.get`,
+`put`, `delete`, `keys` and `watch` on the bundle's channel from that list, and refuses — with the
+reason — a bucket the module was not issued and a write to one it only reads. A watch delivers the
+current values first, without deletions, then an end-of-current marker, then every change, each as a
+`mesh/state` request the bundle answers.
+
+**5. No secret is stored in a bucket, sealed or not.** A bucket is a stream, and design 32 §10 keeps
+every secret off streams. A value that needs a secret names it; the secret travels on request/reply.
+
+**6. The mesh caps size; a bucket outlives its module.** One value per key and no expiry unless the
+owner says otherwise; at most 256 KiB a value and 64 MiB a bucket. Unassigning a module leaves its
+buckets and what is in them ([ADR 0030](0030-data-outlives-the-mesh-that-declared-it.md)); a bucket
+whose declaration is gone from the catalogue is reported, never removed by the mesh.
+
+## Consequences
+
+- A machine that joins reads the current state at once, and every machine sees a change as it
+  happens, with no consumer created per reader and nothing replayed.
+- The runtime's channel has a sixth verb family, and the SDKs a small state surface over it — a
+  contract, which ADR 0039 admits: it changes when the verbs do, rarely, and every module should be
+  rebuilt when it does.
+- What got harder: the runtime must keep each module to its own buckets, because one principal per
+  machine carries all of them and the server enforces only the union. A write the server refuses
+  surfaces to a client as a timeout, not a refusal, so the runtime's own refusal is what a module sees.
+- The secrets rule is only partly mechanical. Sealed values cannot be recognised; the runtime refuses
+  a value with a field whose name says it is a credential, which catches the ordinary mistake and not a
+  determined one. For the operator's agent this means an MCP server's authorisation header stays out of
+  its bucket.
+- Buckets accumulate as modules come and go; that they are reported rather than removed is the price
+  of not deleting data.
+
+## How it is checked
+
+| Rule | Checked by |
+|---|---|
+| A manifest's state names are local, and a read names a bucket its owner declares | the catalogue's registration check, per manifest; a catalogue test that every `reads` whose owner is present names a bucket that owner declares |
+| Buckets exist for every declared state | the controller's raise asserts them idempotently; its test over a real bus |
+| Owners write, readers only read | the composer's test of the grants, per principal kind; the runtime's refusal test over a real bus |
+| A watch hands current values first, without deletions, then changes | the runtime's test over a real bus |
+| No credential-named field in a value | the runtime's refusal test |
+| Live | one module puts on one machine and another machine's watch sees it; a machine assigned afterwards reads it at start |
+
+## References
+
+- Research [024](../01-RESEARCH/024-state-a-module-keeps-on-the-bus/00-overview.md)
+- [Design 32](../03-DESIGN/01-to-be/32-what-a-module-declares.md) §4 and §10, [design 25](../03-DESIGN/01-to-be/25-the-bus-on-nats.md) §1 and §3
+- [ADR 0030](0030-data-outlives-the-mesh-that-declared-it.md), [ADR 0039](0039-what-the-sdk-holds-and-refuses.md),
+  [ADR 0160](0160-the-mesh-issues-an-assignments-subjects-and-a-runtime-serves-what-it-is-issued.md),
+  [ADR 0198](0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md)
@@ -7,11 +7,14 @@ reconstructed: false
 extends: 02-DECISIONS/0048-a-provider-creates-the-credential-the-mesh-minted.md
 ---

-# 201. A provider declares what it derives for each consumer, and the mesh tells both ends
+# 202. A provider declares what it derives for each consumer, and the mesh tells both ends

-> Written as 0188 on 2026-10-02 and renumbered to 0201 on 2026-10-04: the record of the bundles
-> refactor took 0188 on main while this one waited in a pull request, and the mesh's own code now
-> cites that one. Only the number moved; the decision is the one taken on the 2nd.
+> **Written as 0188 on 2026-10-02, renumbered to 0201, and to 0202 on 2026-10-04.** Twice, for the
+> same reason twice: the bundles refactor took 0188 while this waited in a pull request, and the
+> key-value-buckets record took 0201 while this waited again. Both times the number was free when
+> it was chosen and taken by the time this merged. Only the number moved; the decision is the one
+> taken on the 2nd. The check that refuses two records sharing a number is what caught it, both
+> times — a number is how a record is cited, and three repositories cite this one.

 ## Context

@@ -94,6 +97,15 @@ a literal in a consumer's definition is not merely redundant — it is the one t
 disagree with what the provider will actually create. The three object-store consumers lose their
 hand-written bucket names in this change.

+**5. A consumer that keeps several holders of one provision may not be served a derived value.**
+Each holder gets its own login, `…_<local>` ([ADR 0094](0094-a-module-may-hold-several-secrets-from-one-provider.md)),
+and a provider derives from the login — so it would make one resource per holder, while the
+consumer's side has one binding and one `${bound:<provision>:<key>}`, both derived from the
+un-suffixed identity. That is this record's own failure one case to the side, and just as quiet:
+the consumer would authenticate and be refused on every object. Refused at resolution, naming
+both ends. Lifting it means giving the consumer's side a local dimension, which is a decision and
+not an omission.
+
 ## Consequences

 - One more thing a definition may say, and one less thing a module may be wrong about. The
@@ -105,6 +117,10 @@ hand-written bucket names in this change.
 - A provider that already serves consumers keeps serving them: the derived value equals what the
  code derived, so no bucket, database or login changes name. This is a change of **who says it**,
  not of **what is said**.
+- A refusal here fails **that machine's push**, naming the definition, and nothing else. That is
+  deliberate and is the opposite of a module quietly left out: a definition that transcribes
+  somebody else's rule is wrong everywhere, not just here, and the loud failure is in front of
+  whoever can fix it.
 - The mesh now holds a rule in another system's alphabet — one rule, `dns`, stated once. A second
  alphabet is a decision, not an addition: the cost of each is that the mesh must be right about
  somebody else's naming, and that cost is only worth paying where the mesh already mints the name.
@@ -118,6 +134,8 @@ hand-written bucket names in this change.
  consumer — one test asserting the three agree, because agreeing is the whole point.
 - Two consumers of one provider on one machine get two different derived values, and neither gets
  the other's.
+- A consumer with several holders of a deriving provider is refused, with both ends named — the
+  test asserts the refusal, not merely that something failed.
 - A catalogue-wide test refuses a consumer definition that writes a literal where its provider
  derives: the provider's `serves` names the key, so the catalogue can say which definitions
  transcribe one.
@@ -0,0 +1,131 @@
+---
+topic: what runs on it
+status: accepted
+date: 2026-10-04
+deciders: jochen
+reconstructed: false
+extends: 02-DECISIONS/0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md
+---
+
+# 203. The account's environment is one module's, and every module contributes to it
+
+## Context
+
+A variable or a `PATH` entry is a fact about the operator's account. A toolchain needs its directory
+on `PATH`, a version manager needs a variable naming its directory, an agent needs a variable that
+turns one of its behaviours off, and the shell sets an editor. Today every one of these is a line of
+one shell's syntax in one hand-written startup file. [Research 025](../01-RESEARCH/025-how-a-module-plugs-into-the-shell/00-overview.md)
+measured on four machines:
+
+- about a quarter of the 65 lines a workstation runs at shell start are environment;
+- written into `.zshrc`, that environment reaches only interactive zsh. It misses the login shell's
+  `execute` verb ([ADR 0176](0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md)),
+  every script, and every program a graphical session starts;
+- the service manager's place for the account's environment, `~/.config/environment.d/`, holds
+  nothing on any machine.
+
+The shell module as first written carried some of these lines in its own block and dropped the rest.
+
+## Considered Options
+
+1. **Each module writes its own lines into the shell's startup file.** Rejected: one shell's syntax,
+   read by one kind of start, and the same lines rewritten by every shell module.
+2. **Contribute the facts to the login shell, whose holder renders them.** Rejected: the environment
+   then depends on which module holds the shell, every shell module renders the same facts again, and
+   the graphical session sees nothing.
+3. **Option 2, and the service manager's holder renders the same facts a second time** into
+   `environment.d`. Rejected: one fact set with two owners, whose renderings can disagree, and a
+   duty for the service manager unrelated to managing services.
+4. **One file in `environment.d` syntax, sourced by shells.** Rejected: that syntax is close to
+   POSIX assignment but not equal, and a value one reader accepts breaks the other.
+5. **Shells read the service manager's environment generator.** Rejected: every shell start then
+   runs a process and depends on the service manager, and the output is unquoted.
+6. **A module of its own holds the environment.** One mesh seat, held by one module per node,
+   whose files are the account's environment. Every module contributes facts to it, and those facts
+   are written in each reader's format. Chosen. It was the operator's proposal.
+
+Within option 6, two ways to write the files:
+
+- **a. The holder's own code renders what it receives.** This was research 025's starting position.
+  Rejected: the code needs something to run it whenever a contribution changes, and the result exists
+  only after a machine has applied and run it.
+- **b. The controller renders the facts into the holder's files,** in two named formats, at
+  composition. Chosen. The result is in the declaration before any machine applies it, nothing has to
+  trigger anything, and the two formats are standards: POSIX shell assignment and the service
+  manager's `environment.d`. The controller learns no shell. It writes an assignment in a standard
+  syntax, as it already writes a fail2ban stanza a module supplied.
+
+## Decision
+
+**1. The environment is a node seat, `node-environment`, in the mesh's own set.** One module per node
+holds it, and it is the only writer of the account's environment. The first holder is a module of its
+own (working name `node-env`), with no package and no process.
+
+**2. Any module contributes to it with `environment`:**
+
+- **`variables`:** names and values. A name is a POSIX variable name and never `PATH`. A value is
+  literal; it may use `${machine:…}`, resolved first, and may not contain `$`, a quote, a backslash or
+  a line break. The only expansion is the mesh's own, so the two formats cannot read one value
+  differently.
+- **`path`:** entries, each placed at the `start` or the `end` of the account's `PATH`.
+
+**3. The holder places the rendered environment with two placeholders** in its own files:
+
+- **`${environment:posix}`** renders lines a POSIX shell sources:
+  - every variable exported;
+  - every `PATH` entry added only if missing, so sourcing twice changes nothing.
+- **`${environment:systemd}`** renders the same facts as the service manager's user environment, with
+  the account's existing `PATH` kept between the start and the end entries.
+
+Each rendered line names the module that contributed it, so the file answers *where did this come
+from*. Contributions are ordered by module name, and then in the order a module declared them.
+
+**4. The seat's protocol fixes where the POSIX file is:** `~/.config/mesh/environment.sh` under the
+account's home. A shell sources that path without knowing which module wrote it. The service
+manager's file is `~/.config/environment.d/50-mesh.conf`.
+
+**5. Refused at composition:**
+
+- two modules on one node setting the same variable, both named;
+- an environment placeholder in a module that does not claim `node-environment`.
+
+A node with contributions and no holder writes them nowhere. The holder's absence is visible in the
+node's assignments, and no contributor is refused for it, because a missing `PATH` entry is a gap, not
+a broken machine.
+
+## Consequences
+
+- A shell's part in the environment is one line in its always-read startup file, sourcing the
+  POSIX file. A second shell module writes the same line in its own syntax, and no contributor
+  changes when the login shell does.
+- The graphical session sees the same `PATH` as the terminal, from the same facts.
+- The controller gains one gathered field and two renderers. Both are tested byte for byte, like
+  the jails a node composes ([to-be 31](../03-DESIGN/01-to-be/31-a-module-declares-its-fail2ban-jail.md)).
+- What a person sets for themselves stays theirs: variables of their own sit in their own lines of
+  their shell's file, read after the mesh's.
+- **What got harder:** a value that needs another variable expanded (`$HOME`, `$XDG_CONFIG_HOME`)
+  must be written with the mesh's own `${machine:…}` facts, or it is refused. Expansion at shell start
+  is exactly what made one value mean two things in two readers.
+- Once [issue 168](../04-ISSUES/168-a-setting-reaches-every-file-and-contribution/00-report.md)
+  closes, a value a person varies becomes a setting of the module that contributes it
+  ([ADR 0174](0174-a-node-varies-a-module-through-settings-and-kept-regions-never-an-edit.md)).
+
+## How it is checked
+
+| Rule | Checked by |
+|---|---|
+| Both renderings, byte for byte, from a fixed set of contributions | the controller's environment tests |
+| Sourcing the POSIX rendering twice leaves `PATH` unchanged | the same tests, running `sh` over the rendering |
+| A variable set by two modules is refused, naming both | the controller's resolve test |
+| An environment placeholder outside the holder is refused | the catalogue check, which registration runs |
+| A value with `$`, a quote, a backslash or a line break is refused | the manifest's parse test |
+| The zsh holder sources the path the seat fixes | the catalogue's zsh test |
+
+## References
+
+- [Research 025](../01-RESEARCH/025-how-a-module-plugs-into-the-shell/00-overview.md)
+- [ADR 0174](0174-a-node-varies-a-module-through-settings-and-kept-regions-never-an-edit.md),
+  [ADR 0176](0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md),
+  [ADR 0177](0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md),
+  [ADR 0182](0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md)
+- [To-be 41](../03-DESIGN/01-to-be/41-the-shell-and-the-accounts-environment.md)
@@ -0,0 +1,131 @@
+---
+topic: what runs on it
+status: accepted
+date: 2026-10-04
+deciders: jochen
+reconstructed: false
+extends: 02-DECISIONS/0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md
+---
+
+# 204. A module contributes shell code to the login shell in named slots, and the login shell is the mesh's seat
+
+## Context
+
+Some of what a shell runs at start is code in that shell's own syntax, and it belongs to other
+modules:
+
+- a prompt theme loads itself and its configuration;
+- plugins load themselves;
+- a version manager sources its loader.
+
+Order matters: a prompt's instant-prompt cache must run first, and syntax highlighting last. The
+predecessor kept all of this in one file per machine, and installed the theme and plugins by cloning
+them in a hook.
+[Research 025](../01-RESEARCH/025-how-a-module-plugs-into-the-shell/00-overview.md) measured that file
+as byte-identical on four machines. It carries:
+
+- the shell's defaults;
+- code belonging to four other pieces of software;
+- a handful of the operator's own lines.
+
+Nothing gave the other pieces a way in.
+
+Two further facts bear on the seat itself:
+
+- **The seat is declared by the zsh module** ([ADR 0176](0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md)
+  §1, under [ADR 0126](0126-a-module-declares-its-own-seats.md)). The controller refuses a second
+  module declaring a seat name, so fish or bash could only ever claim it, and the seat exists only
+  while zsh's definition is registered.
+- **The kept region is the other way round.** [ADR 0174](0174-a-node-varies-a-module-through-settings-and-kept-regions-never-an-edit.md)
+  describes a kept region as a marked block holding the operator's lines. The host built the inverse:
+  the mesh's region is the marked block, and every byte outside it is kept, verified unchanged, and
+  given back when the module goes.
+
+## Considered Options
+
+1. **A drop-in directory** that each module places a file in, and the shell sources. Rejected: every
+   contributor names a path inside the shell module's territory
+   ([ADR 0112](0112-a-module-definition-names-no-node-mesh-or-path.md)); order becomes a naming
+   convention nothing checks; and nothing ties the file to the shell actually being the one it is
+   written for.
+2. **Facts the holder renders**, through `contributes` / `receives`. Rejected: code is not a fact,
+   and the holder would only paste it.
+3. **Code contributed for a named shell in a named slot, assembled by the controller into the
+   holder's file.** This is what the controller already does for fail2ban jails: each module supplies
+   text in the tool's own format, and the controller sorts and concatenates it into the holder's file
+   without interpreting it. Chosen.
+
+For order, numbers (`10`, `50`, `90`) were rejected: every contributor guesses one, and collisions are
+silent. **Three named slots** were chosen: `first`, `normal`, `last`.
+
+## Decision
+
+**1. `node-login-shell` is a node seat in the mesh's own set,** with the verb `execute`. It replaces
+the module-declared `login-shell`. Everything else ADR 0176 decided stands: the holder sets the
+account's login shell through the `user` shape, `execute` is the contract, and any node may call it.
+A shell module claims the seat; none declares it.
+
+**2. Any module contributes shell code with `shell`:** entries naming the shell they are for (`zsh`,
+`bash`, `fish`), the slot, and the code. The controller does not read the code.
+
+**3. The holder places the code with placeholders** in its own files: `${shell:<shell>:<slot>}`. Each
+is filled with that shell's code for that slot, from every module on the node:
+
+- ordered by module name;
+- each piece preceded by a line naming its module;
+- empty when nothing is contributed.
+
+A shell-code placeholder in a module that does not claim `node-login-shell` is refused.
+
+**4. The holder's duties, which are the seat's protocol:**
+
+- Source the account's environment ([ADR 0203](0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md))
+  from the startup file every start of that shell reads. For zsh that is `.zshenv`, which a script, a
+  login and `execute` all read.
+- Write its interactive block at the **start** of the interactive startup file, so the operator's own
+  lines run after the mesh's and win.
+- Run `execute` as a non-interactive login shell in the account's home:
+  - bounded below the runtime's call limit;
+  - its output bounded;
+  - its whole process group ended on timeout.
+
+**5. The marked block is the mesh's; everything outside it is the operator's.** This is how ADR 0174's
+"kept region" is built. That record keeps its decision and gains a note saying where the mechanism
+lives.
+
+## Consequences
+
+- A prompt, a plugin and a version manager are each a module with its own package or archive, its own
+  configuration file, and a contribution. Assigning one adds its line to the shell, and unassigning it
+  takes the line away at the next composition.
+- Assigning the shell module loses nothing the machine does today:
+  - what is common to every machine becomes the shell module's default or another module's
+    contribution;
+  - what is the operator's stays below the block.
+- **The one-off migration is a person's act**, listed in the shell module's documentation
+  ([ADR 0182](0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md)):
+  delete the lines the block now carries from the found file.
+- `login-shell.execute` becomes `node-login-shell.execute`. Nothing has called it yet; the shell
+  module was never assigned.
+- **What got harder:** a module wanting a line in the shell must say which shell and which slot, and a
+  module supporting three shells writes its code three times. That is the honest cost of code in
+  three syntaxes.
+
+## How it is checked
+
+| Rule | Checked by |
+|---|---|
+| Code lands in its slot, in module order, only for its shell | the controller's shell-contribution tests |
+| A shell-code placeholder outside the holder is refused | the catalogue check |
+| `node-login-shell` is the mesh's, and no module may declare it | the seat table's tests |
+| The zsh block sits at the start, sources the environment from `.zshenv`, and holds the three slots | the catalogue's zsh test |
+| `execute` is bounded in time and output and kills its process group | the zsh module's tool tests over real child processes |
+
+## References
+
+- [Research 025](../01-RESEARCH/025-how-a-module-plugs-into-the-shell/00-overview.md)
+- [ADR 0174](0174-a-node-varies-a-module-through-settings-and-kept-regions-never-an-edit.md),
+  [ADR 0176](0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md),
+  [ADR 0203](0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md),
+  [to-be 31](../03-DESIGN/01-to-be/31-a-module-declares-its-fail2ban-jail.md)
+- [To-be 41](../03-DESIGN/01-to-be/41-the-shell-and-the-accounts-environment.md)
@@ -0,0 +1,69 @@
+---
+topic: what runs on it
+status: accepted
+date: 2026-10-04
+deciders: jochen
+reconstructed: false
+---
+
+# 205. Software the distribution does not package ships as a pinned archive of the module's own
+
+## Context
+
+The prompt theme the operator uses is not in the distribution's repositories. Its two plugins and an
+autocomplete plugin are. The predecessor installed all four by running `git clone` against their
+upstream repositories from an install hook. That way:
+
+- the version on a machine was whatever upstream's default branch held the day the hook ran;
+- two machines set up a week apart could differ;
+- a machine with no route to upstream failed its install.
+
+The mesh already has a pinned, delivered form for a module's own files: an **archive artifact** built
+from a directory of the module's source, delivered by the artifact store, unpacked by the host's
+`archive` resource, and pinned by digest. One showcase module uses it.
+
+## Considered Options
+
+1. **Clone from upstream on the machine,** as the predecessor did. Rejected: unpinned, unreproducible,
+   and it needs upstream reachable from every machine.
+2. **Build from the distribution's user repository.** Rejected: the host installs packages from the
+   distribution's own repositories. A user-repository build is a toolchain on every machine for one
+   theme.
+3. **Vendor a pinned upstream release into the module's directory and ship it as the module's archive
+   artifact.** Chosen. The release and its version are named in the module, its licence travels with
+   it, and every machine gets the same bytes from the mesh's own store.
+
+## Decision
+
+**A module whose software the distribution does not package carries a pinned upstream release in its
+own source directory and ships it as an archive artifact.**
+
+- The module's documentation names the upstream, the version and the licence.
+- The host unpacks it with the `archive` resource into a directory the module owns.
+- An upgrade is a change to the module, reviewed like any other.
+
+Software the distribution *does* package is installed as a package; a vendored copy of it is
+refused in review.
+
+## Consequences
+
+- The catalogue grows by the size of what it vendors: 1.4 MB for the prompt theme at the pinned
+  release.
+- Upstream's security fixes reach a machine only when somebody updates the module. That is the same
+  trade every pinned dependency makes, and it is visible: the version is in the module.
+- **What got harder:** a vendored program that downloads more at run time, as the prompt theme does
+  for its git status helper, still fetches that part from upstream on first use. This record pins
+  what the mesh ships, not what the software fetches for itself. The module's documentation says so.
+
+## How it is checked
+
+| Rule | Checked by |
+|---|---|
+| The archive is pinned by digest | the host's declaration validation, which refuses an archive without one |
+| The upstream, version and licence are named | review of the module's documentation; the module's test asserts the licence file is in the archive |
+| Packaged software is not vendored | review |
+
+## References
+
+- [ADR 0204](0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md)
+- [To-be 41](../03-DESIGN/01-to-be/41-the-shell-and-the-accounts-environment.md)
@@ -0,0 +1,144 @@
+---
+topic: what runs on it
+status: accepted
+date: 2026-10-04
+deciders: jochen
+reconstructed: false
+extends: 02-DECISIONS/0183-the-anthropic-licence-manager-is-a-module-and-hands-tokens-to-the-agent-over-the-bus.md
+---
+
+# 206. A node reports the Anthropic grant it holds; the licence manager adopts a licence by refreshing it, and what each node should hold is the manager's state
+
+## Context
+
+[ADR 0183](0183-the-anthropic-licence-manager-is-a-module-and-hands-tokens-to-the-agent-over-the-bus.md)
+made the licence manager a module holding the `anthropic-licence-manager` seat: one rotation source, the
+long-lived grants in its own store, a short-lived token handed to a node sealed on request/reply, the
+agent module alone writing what the agent reads. How the manager *learns* a licence, and who starts each
+exchange, it left to a later shape, and three texts have since disagreed: ADR 0183 has a node register
+its key and the manager adopt a login only into a licence the node is already bound to; its dated note
+of 2026-10-03 has the manager start every exchange and visit every node on a schedule; the agent module
+as built asks the seat for its token when an event says to, and pushes a login to the seat.
+
+**The operator settled it on 2026-10-04, in the operator's own words:** the manager must hold the active refresh token;
+whichever node a login happened on holds the latest one; every client publishes what its credentials
+file holds, the manager sees a licence it does not own yet and takes it into its store, and from then on
+rotates it and distributes the access token. A manager launched for the first time holds no licence and
+accepts what the clients report. Several nodes report the same account — today the nodes are all logged in
+to one personal account — and before the manager adopts a grant it must know the refresh token still
+works.
+
+Two facts bound how that is built:
+
+- **A refresh token cannot be published.** Anything published on the bus is kept, and a secret never
+  enters a stream, sealed or not ([design 32](../03-DESIGN/01-to-be/32-what-a-module-declares.md) §10).
+  A module's state is a stream too, and the runtime refuses a value carrying a field named like a
+  credential ([ADR 0201](0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md);
+  refused live on 2026-10-04 for an `Authorization` header).
+- **A refresh token can only be checked by using it.** No endpoint answers "is this refresh token
+  valid" without exchanging it, and an exchange is presumed to rotate it (ADR 0183: the predecessor
+  lost a licence to a reused one). Checking and adopting are therefore one act, and whoever checks
+  becomes the token's only live holder.
+
+Since ADR 0201 the bus has the shape this needs: **state** every node sees, including one that joins
+later or a manager that starts later, read whole on start and then watched.
+
+## Considered Options
+
+1. **Each node publishes its credentials file, the token included.** What the operator described,
+   literally. Rejected for the token only: it would sit in a stream every principal that reads the
+   bucket can read, for as long as the bucket keeps it, and the runtime refuses it anyway.
+2. **The manager visits every node on a schedule and collects a waiting login** (ADR 0183's dated
+   note). Rejected: the manager must know every node in advance and poll it, a node that joins later
+   waits for the next visit, and "what does each node hold" lives nowhere anyone can read.
+3. **Each node reports what it holds as state, without the secret; the manager asks for the secret
+   only when the report shows a grant it does not hold, and adopts by refreshing.** Chosen: the
+   operator's flow, with the one part that cannot be on the bus moved onto request/reply.
+
+## Decision
+
+**1. Every agent module reports what its node holds, as its own state.** One key per node in the
+module's `holdings` state: the account's identity as the agent's own state file names it (account id,
+address, organisation), the kind, the refresh token's **fingerprint** and whether one is present at
+all, the access token's fingerprint and expiry, the licence it was last handed, and when the credentials
+file last changed. Written when the module starts — a node already logged in when the module is first
+assigned reports at once — and again whenever the credentials file changes. **No token, ever**: a
+fingerprint names a token without being one.
+
+**2. A licence is an account, and the manager learns it from the reports.** The manager reads every
+node's `holdings` at start and watches them. A report carrying a refresh token whose fingerprint the
+manager does not hold is a **candidate**: for an account it has no licence for yet, a new licence; for
+one it has, a login made since. A manager launched for the first time holds no licence and treats
+every report as a candidate. An API key still enters only through the seat's `adopt` verb, from a file
+on the manager's node.
+
+**3. The secret travels only when asked for.** For a candidate, the manager calls that node's agent
+module on request/reply, giving its own public key, and is answered with the grant sealed to that key
+(ADR 0183's channel, unchanged).
+
+**4. Adopting is refreshing.** The manager exchanges the candidate's refresh token at the vendor's
+endpoint under its lease for that account. If the exchange succeeds, the grant it got back is the
+licence's, stored encrypted, and the manager is from then on its only rotation source. If it fails, the
+candidate is recorded dead, nothing is adopted, and the report says so. **Several nodes, one account:**
+candidates for one account are tried newest login first; the first that refreshes is adopted, and the
+manager does not exchange the others.
+
+**5. A node holds an access token only, so the latest login wins.** A node bound to an adopted licence
+is handed the access token and nothing else, and the agent module writes the credentials file without a
+refresh token — so the agent on the node can never refresh it, and two refreshers never hold one grant.
+A refresh token appearing in a node's file afterwards can therefore only be a person's login there; its
+report makes it a candidate, and if it refreshes it replaces the licence's grant. That is the operator's
+"whichever node a login happened on holds the latest one", made mechanical.
+
+**6. What each consumer should hold is the manager's state.** One key per consumer in the manager's
+`bindings` state: the licence, its kind, and a **generation** that increases with every rotation and
+every switch. The agent module watches its own key; when the generation is newer than the one it
+applied, it asks the seat's `current` verb for the token, sending its public key, and is answered sealed
+(request/reply). A node that was away reads its key when it is back and asks once. The `licence.rotated`
+and `licence.switched` events go: what they announced is now the state itself, and a node needs the
+latest, not the history.
+
+**7. A first binding follows the login.** When the manager adopts a licence from a node's report, a
+node with no binding yet whose report names that account is bound to it. Every later change is a
+person's act through `bind`, `switch` and `release`, as ADR 0183 says.
+
+**8. The identity guard stands, on two sources.** The account a grant is filed under is the identity
+the node read from the agent's own state. Where the vendor's answer to the refresh names the account,
+the manager compares the two and refuses a mismatch with a notification; whether it names it is
+measured when the manager is built, and the record of which source decided is kept in the audit.
+
+## Consequences
+
+- The manager needs no configuration to start: launched on a mesh whose nodes are logged in, it adopts
+  every account they hold, one licence each, from the newest login that still refreshes.
+- Every node's holding is readable by anyone allowed to read the state — the console, an agent, the
+  operator — without a token in sight, which is what `licence_status` on each node answered one at a
+  time.
+- **What got harder:** adoption consumes the refresh token the node held. On a node whose grant was
+  adopted, the agent's own copy is dead from that moment; until the manager hands it an access token
+  (decision 6), the agent keeps the access token it already had, which lives hours. And a node whose
+  file still holds a refresh token after adoption — it was not handed one yet — is a second holder of a
+  dead grant, not a live one, so the rotation-source rule holds.
+- A candidate whose refresh fails is not retried by the manager: a dead refresh token does not come
+  back. A person logs in again, and the new report is a new candidate.
+- Nothing in the reports is secret, but they do say which account each node uses; readers of the state
+  are declared in manifests like any other.
+
+## How it is checked
+
+| Rule | Checked by |
+|---|---|
+| No report carries a token | the runtime refuses a credential-named field (ADR 0201's test); the agent module's test: a report built from a full credentials file holds fingerprints and identity only |
+| A node already logged in reports at start | the agent module's test: with a credentials file present and unchanged, starting writes its `holdings` key |
+| A candidate is adopted only by a successful refresh, newest login first, once per account | the manager's tests against a stub vendor: two reports for one account, the newer refreshes and is adopted, the older is never exchanged; a failing refresh adopts nothing and records the candidate dead |
+| A node is handed an access token only | the agent module's test: the file it writes after a hand-over holds no refresh token |
+| A newer generation is fetched once, by request | the agent module's test: a `bindings` change with a newer generation asks `current` once; an equal one asks nothing |
+| No event carries a token, and none announces a rotation any more | the manager's test of everything it publishes |
+| Live | the manager launched with no licence on a mesh whose four nodes are logged in to one account adopts one licence, binds the four nodes, and each node's file then holds an access token and no refresh token |
+
+## References
+
+- [ADR 0183](0183-the-anthropic-licence-manager-is-a-module-and-hands-tokens-to-the-agent-over-the-bus.md) — the manager, its seat and its channel, which this extends
+- [ADR 0201](0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md) — module state, and the refusal of a secret in it
+- [design 32](../03-DESIGN/01-to-be/32-what-a-module-declares.md) §10 — no secret in a stream
+- [to-be 36](../03-DESIGN/01-to-be/36-the-operators-agent-on-a-machine.md), [to-be 39](../03-DESIGN/01-to-be/39-the-anthropic-licence-manager.md) — the two modules, amended by this record
@@ -0,0 +1,107 @@
+---
+topic: the mesh
+status: accepted
+date: 2026-10-04
+deciders: jochen
+reconstructed: false
+extends: 02-DECISIONS/0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md
+---
+
+# 207. A module depends on the node seats that apply its resources
+
+## Context
+
+A module declares resources: packages, services, containers, files. Some of those are applied
+through software on the machine that is itself a module:
+
+- a service through the service manager;
+- a package through the package manager;
+- a container through the container runtime.
+
+Until now nothing said so. A module carried a *capability* such as `service-manager` or
+`package-manager`, which the host detects on the machine. A capability says the software is
+installed. It does not say that a module of the mesh holds the role and answers for it.
+
+The cost showed on 2026-10-04:
+
+- **A networking module declared the service manager's own package.** The controller allows one
+  declaration of a resource per node, so the module that *is* the service manager could not declare
+  its package and had been written without it. The networking module's real relation to the service
+  manager, that it needs one held on its node, was nowhere.
+- **The container runtime** has had this decided for its own case since ADR 0165 and ADR 0166
+  (proposed): a module that delivers a container needs the runtime seat held on its machine, derived
+  from the container resource, with no manifest field.
+- **The operator's order for building the machines' modules** (to-be 42) is *the most core first*.
+  That is an order the mesh should enforce, not one a person should remember.
+
+## Considered Options
+
+1. **Keep capabilities as the only gate.** Rejected: a capability is a fact about the machine, not
+   about the mesh. Software installed by hand satisfies it, and nothing then answers for it.
+2. **A manifest field per module naming the seats it needs.** Rejected: a module would restate what
+   its resources already say, and a module that adds a service but forgets the field passes.
+3. **Derive the dependency from the resources,** as ADR 0165 already does for containers, and refuse
+   an assignment whose seats are not held on the node. Chosen.
+
+## Decision
+
+**1. Three node seats apply resources,** each in the mesh's own set:
+
+| resource | applied through | seat | first holder |
+|---|---|---|---|
+| `service` | the service manager | `node-service-manager` (ADR 0177) | `systemd` |
+| `package` | the package manager | `node-package-manager` (new) | `pacman` |
+| `container` | the container runtime | `node-container-runtime` (ADR 0166) | `docker` |
+
+`node-package-manager` is new and has no verbs yet. `node-container-runtime` is seeded now as ADR 0166
+names it. Its verbs, and the host creating containers through its holder, stay with that record's
+acceptance.
+
+**2. A module depends on each seat its resources need.** The controller derives this from the
+resource types the module declares. A module never states it.
+
+**3. A dependency is met when any module assigned to the same node holds the seat,** the module
+itself included. The holders of these seats declare resources of each other's kinds: the service
+manager's package needs the package manager, and the package manager's timer needs the service
+manager. They are therefore judged as the node's whole set of assignments, never one at a time.
+
+**4. Where it is checked:**
+
+- **At `assign`,** an assignment whose dependencies are unmet by the node's assignments, including the
+  new one, is refused. The refusal names each seat and the modules in the catalogue that can hold it.
+- **At composition,** an unmet dependency on a node is **reported** in `status` until the three holders
+  are assigned to every node. Then it is **refused** like any unresolved requirement. The switch is one
+  line in the controller, made when `status` reports none.
+
+**5. The mesh's own foundation is exempt.** These are the pieces genesis lays before any module exists:
+the host, the private network and the bootstrap runtime. Their declarations are the installation's,
+not a module's.
+
+## Consequences
+
+- The order of to-be 42 becomes the mesh's: `systemd`, `pacman` and `docker` on a node before
+  anything that installs, runs or contains.
+- **Two modules no longer declare one shared package to say they need it.** A component's module
+  (networkd's) declares what it configures and depends on the seat. The component's own package
+  belongs to the module that holds the seat.
+- Capabilities stay what they are, facts about the machine, used where a module needs the machine to
+  be able to do something.
+- **What got harder:** a module can no longer be tried on a node that lacks the core three. That is
+  the point.
+
+## How it is checked
+
+| Rule | Checked by |
+|---|---|
+| The dependency is derived from resources: a service, a package and a container each need their seat | the controller's resolve tests |
+| A node whose assignments hold the seats passes; one missing a holder is refused at `assign`, naming the seat and its possible holders | the same tests, and `assign` live |
+| Mutual dependencies among the holders resolve when they are assigned together | the same tests |
+| Until the switch, an unmet dependency is reported in `status` and does not refuse a push | the controller's status test |
+| Foundation declarations are exempt | the composition test with genesis's declarations |
+
+## References
+
+- [ADR 0165](0165-container-runtime-is-what-a-machine-can-run-and-a-running-runtime-is-its-holders-health.md),
+  [ADR 0166](0166-the-container-runtime-is-a-node-seat-and-the-host-creates-containers-through-its-holder.md),
+  [ADR 0177](0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md)
+- [To-be 42](../03-DESIGN/01-to-be/42-the-machines-modules-in-order.md)
@@ -0,0 +1,138 @@
+---
+topic: what runs on it
+status: accepted
+date: 2026-10-04
+deciders: jochen
+reconstructed: false
+extends: 02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md
+---
+
+# 208. The graphical session is one module per piece, on the mesh's seats
+
+## Context
+
+The two workstations run one predecessor desktop
+([research 026](../01-RESEARCH/026-the-graphical-session-as-modules/00-overview.md)). It was a module of
+983 lines with four flavors and 92 theme variables. One of its machines carried another machine model's
+hardware files, and its session's environment was a hand-kept copy of the account's. The operator asked
+for the desktop as modules at the shell's level, consistent across machines, with sway as a sibling of i3.
+To-be 38 named this WP7, and to-be 37 left one question for the resolver: how a module says it needs a
+display server held on its node.
+
+## Considered Options
+
+- **One desktop module, as before** (research 026 §1, G1). Rejected: flavors again, and the evidence is
+  a flavor on the wrong machine.
+- **One module per piece of software.** Chosen.
+- **For "i3 needs an X server" (research 026 §3):**
+  - a new field (R2), rejected as a second way to say what provisions already say;
+  - assigning carefully (R3), rejected because that is the misassignment the evidence shows;
+  - **a provision with the machine's reach** (R1), chosen.
+- **For other modules' lines in a holder's file (research 026 §5):**
+  - only drop-ins (C1), rejected because two files the session needs have no drop-in convention;
+  - only slots (C2), rejected as needless where the tool already reads a directory;
+  - **both, the boundary drawn by the tool** (C3), chosen.
+
+## Decision
+
+**1. One module per piece of software:** `lemurs`, `xorg`, `i3`, `xterm`, `picom`, `rofi`, `dmenu`,
+`dunst`, the lock screen, `xclip`, the clipboard manager, `feh`, `i3status-rust`, a theme module,
+`fonts`, `gnome-keyring`, and later `sway`, `foot`, `waybar` and `mako`. No flavors. What follows a
+machine's hardware is that model's hardware module (research 027/03).
+
+**2. The roles are node seats in the mesh's own set,** each with the verbs research 026/05 starts it with:
+
+| seat | holders | verbs to start with |
+|---|---|---|
+| `node-login-manager` | lemurs | `sessions` |
+| `node-display-server` | xorg, sway | `displays`, `layout` |
+| `node-display-session` | i3, sway | `reload`, `workspaces`, `windows` |
+| `node-terminal-emulator` | xterm, foot | `open` |
+| `node-launcher` | rofi, dmenu | `menu`, the dmenu-compatible command |
+| `node-notifier` | dunst, mako | `send`, `history` |
+| `node-lock-screen` | the lock module, swaylock | `lock` |
+| `node-clipboard` | the clipboard manager | `history`, `copy` |
+| `node-bar`, `node-compositor` | i3status-rust, waybar; picom | none yet |
+| `node-secret-service` | gnome-keyring | none yet |
+
+A compositor that is its own server holds two seats, as sway does.
+
+**3. A display is a provision with the machine's reach.**
+
+- A display server provides `x11-display` or `wayland-display`, reachable only on its own machine.
+- A module that draws on a display requires the one it speaks: i3, picom, xterm and the X lock require
+  `x11-display`; sway's companions require `wayland-display`.
+- A requirement with the machine's reach is resolved on the requiring module's own node, or not at
+  all, and is refused naming the seat's holders.
+- `xwayland`, as its own module, provides `x11-display` inside a Wayland session.
+
+This answers to-be 37 §4 by reusing provisions and reach rather than a new field. A capability the host
+reports, `graphical-session`, still gates the display server itself.
+
+**4. Other modules contribute to a holder's file in the tool's own grain.**
+
+- Where the tool reads a directory, the contributor places its own file there:
+  - i3's `include` directory;
+  - dunst's `dunstrc.d`;
+  - XDG autostart;
+  - `environment.d`;
+  - fontconfig's `conf.d`;
+  - ssh's `config.d`;
+  - the login manager's session directory.
+- Where it does not, **ADR 0204's slots serve beyond shells.** A `shell` contribution's `for` may also
+  name:
+  - `xinitrc`: POSIX code the session's start runs;
+  - `xresources`: X resources merged at session start.
+
+  The holder of `node-display-server` places them with `${shell:xinitrc:<slot>}` and
+  `${shell:xresources:<slot>}`.
+
+**5. The display server's module writes the session's start.** It writes a block at the start of
+`~/.xinitrc`, in this order:
+
+1. it sources the account's environment (ADR 0203);
+2. it imports the session's own variables into the user manager and D-Bus activation, by an explicit
+   list;
+3. it merges the X resources;
+4. it runs the `xinitrc` slots;
+5. it ends by starting the session holder's command, which the session module contributes in the
+   `last` slot.
+
+The desktop's identity and the theme variables are environment contributions of the session and
+theme modules. The hand-kept environment in today's file goes, and so does the predecessor's file of
+secrets (research 027 question 2).
+
+**6. Per-machine values:**
+
+- Monitor layouts are profiles keyed by the monitors' identities (research 026/04). They are the
+  operator's data, and the display server's `layout` verb manages them.
+- DPI and theme values are module defaults now, and settings after issue 168.
+
+## Consequences
+
+- A workstation's desktop is a list of assignments, the same on both. The one machine model's
+  hardware is one more assignment.
+- The X stack is built first, and sway is designed in from the start.
+- The controller learns:
+  - the eleven seats;
+  - provisions with the machine's reach;
+  - two more names for a contribution's `for`.
+- **What got harder:** a module that draws must say which display it speaks, and one that wants both
+  ships twice.
+
+## How it is checked
+
+| Rule | Checked by |
+|---|---|
+| The seats are in the mesh's own set, refused to any module that declares them | the seat table's tests |
+| A machine-reach requirement resolves on its own node only, refused naming the holders | the controller's resolve tests |
+| `xinitrc` and `xresources` slots are placed only by the display server's holder | the catalogue check |
+| The session block sources the environment, merges resources, runs the slots and ends with the session | the `xorg` module's manifest test, and on the proving workstation |
+
+## References
+
+- [Research 026](../01-RESEARCH/026-the-graphical-session-as-modules/00-overview.md), its 02, 04 and 05
+- [ADR 0203](0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md),
+  [ADR 0204](0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md),
+  [ADR 0207](0207-a-module-depends-on-the-node-seats-that-apply-its-resources.md)
+- [To-be 42](../03-DESIGN/01-to-be/42-the-machines-modules-in-order.md)
@@ -190,7 +190,8 @@ python3 00-META/checks/index.py            fail if stale
 - **0187** — [A dead tracker is not the machine's failure](0187-a-dead-tracker-is-not-the-machines-failure.md)
 - **0189** — [The store keeps what the records name, and a maintenance step holds its writers still](0189-the-store-keeps-what-the-records-name.md)
 - **0190** — [A seat's work is shared by its holders, and building is the first such role](0190-a-seats-work-is-shared-by-its-holders-and-building-is-the-first-such-role.md)
- **0201** — [A provider declares what it derives for each consumer, and the mesh tells both ends](0201-a-provider-declares-what-it-derives-for-each-consumer.md)
+- **0202** — [A provider declares what it derives for each consumer, and the mesh tells both ends](0202-a-provider-declares-what-it-derives-for-each-consumer.md)
+- **0207** — [A module depends on the node seats that apply its resources](0207-a-module-depends-on-the-node-seats-that-apply-its-resources.md)

 ### Its tiers, from the bottom up

@@ -300,6 +301,12 @@ python3 00-META/checks/index.py            fail if stale
 - **0195** — [The mesh's tools are found by address, not announced whole](0195-the-meshs-tools-are-found-by-address-not-announced-whole.md)
 - **0197** — [Every tool announces itself on the bus, in the NATS services protocol](0197-every-tool-announces-itself-on-the-bus-in-the-nats-services-protocol.md)
 - **0198** — [A module's long-running code is launched by the node's runtime, and reaches the bus through it](0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md)
+- **0201** — [A module keeps its current state in key-value buckets it declares, and reaches them through the runtime](0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md)
+- **0203** — [The account's environment is one module's, and every module contributes to it](0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md)
+- **0204** — [A module contributes shell code to the login shell in named slots, and the login shell is the mesh's seat](0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md)
+- **0205** — [Software the distribution does not package ships as a pinned archive of the module's own](0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md)
+- **0206** — [A node reports the Anthropic grant it holds; the licence manager adopts a licence by refreshing it, and what each node should hold is the manager's state](0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md)
+- **0208** — [The graphical session is one module per piece, on the mesh's seats](0208-the-graphical-session-is-one-module-per-piece-on-the-meshs-seats.md)

 ### How it is built

@@ -7,8 +7,10 @@ code:
  - mesh-tools src/broker-amqp.ts (to be replaced)
  - mesh-catalog modules/nats (to be written)
  - mesh-sdk src (the protocol's NATS binding, step 3)
-updated: 2026-10-02
+  - mesh-tools node-tools/internal/bus (a module's state, ADR 0201)
+updated: 2026-10-04
 decisions:
+  - 02-DECISIONS/0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md
  - 02-DECISIONS/0167-a-membership-carries-what-its-module-receives-and-who-the-mesh-is.md
  - 02-DECISIONS/0160-the-mesh-issues-an-assignments-subjects-and-a-runtime-serves-what-it-is-issued.md
  - 02-DECISIONS/0157-a-build-says-what-it-does-on-the-bus-as-it-happens.md
@@ -48,6 +50,7 @@ mesh's own state lives, and where what a module may say is decided by what it de
 | **events** — a module says something happened | 1:many | delivered to every consumer that declared it; dead-lettered when it cannot be |
 | **tools** — a module or a person asks another's tool | request/reply | one answer, from one server, or a timeout |
 | **work to a role** — a module submits to a capability without knowing who provides it | job | exactly one holder does it; it queues while nobody does |
+| **state** — a module's current value of something, every machine reading it | key-value | the newest per key, kept until replaced or deleted; read whole by a machine that joins later |

 The last two rows are the ones worth dwelling on, because they are not messaging in the sense of
 carrying bytes from A to B. **A role is addressable**, so a caller names the capability and never
@@ -56,7 +59,8 @@ changing ([ADR 0126](../../02-DECISIONS/0126-a-module-declares-its-own-seats.md)
 property of the mesh's architecture that happens to be expressed in subjects.

 And more of the mesh lands here as it is built: conditions and observed state in key-value
-buckets that anything may watch, the server's own advisories becoming observations like any other
+buckets that anything may watch — the first of them a module's own declared state, *2026-10-04*
+([ADR 0201](../../02-DECISIONS/0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md)) — the server's own advisories becoming observations like any other
 ([research 017](../../01-RESEARCH/017-a-mesh-that-heals-itself/00-overview.md)), and a person's
 client speaking the bus directly rather than through a surface built over it (§7). None of that
 is a message being moved; all of it is the bus being the mesh's centre.
@@ -84,8 +88,16 @@ mesh.seat.<seat>.event.<verb>     a role's own event           (JetStream: EVENT
 mesh.seat.<seat>.tool.<verb>      a role's tool                (core request/reply)
 mesh.ask.<node>.<command>         the controller's command api (core request/reply)
 mesh.assignment.<node>.<module>   an assignment's membership   (JetStream: ASSIGNMENTS, last-per-subject)
+$KV.<module>_<name>.<key>          a module's state             (JetStream: a key-value bucket per declared name)
 ```

+**Added 2026-10-04** ([ADR 0201](../../02-DECISIONS/0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md)):
+the last row is outside `mesh.` on purpose. A key-value bucket is NATS's own construct and lives
+under NATS's own prefix, which is what lets the server's key-value layer — direct reads, rollups,
+delete markers, watches — do the work instead of the mesh writing it again. The bucket is named for
+the module and the local name joined by an underscore, which neither may contain, so two modules can
+never derive one bucket.
+
 **Revised 2026-10-01** ([ADR 0160](../../02-DECISIONS/0160-the-mesh-issues-an-assignments-subjects-and-a-runtime-serves-what-it-is-issued.md)): the rows above
 for a module's and a seat's tools are the shapes the controller *issues*, not rules a runtime carries.
 Every assignment is published a membership — what it serves and where, in which queue, its seat verbs,
@@ -155,6 +167,7 @@ Core NATS is at-most-once. Everything the mesh must not lose lives in a JetStrea
 | CONTROL | `mesh.control.>` except `alive` (a build's outcome moved to its seat, ADR 0121) | work queue, one consumer (the controller), explicit ack | the store-window guarantee ([ADR 0083](../../02-DECISIONS/0083-one-push-leaves-the-mesh-consistent.md)): the controller `nak`s with a delay while its store is away and the message is redelivered; nothing is dropped |
 | NODES | `mesh.node.>` | last per subject | one declaration per node, always the newest |
 | EVENTS | `mesh.mod.*.event.>` and `mesh.seat.*.event.>` | limits (age, size), durable consumer per subscribing module | a subscriber that was down catches up; after `max-deliver` attempts the advisory feeds `mesh.events.dead` (its own small stream). *2026-10-01:* a build's whole log is here too, as the build-machine seat's `log.<build id>` events ([ADR 0157](../../02-DECISIONS/0157-a-build-says-what-it-does-on-the-bus-as-it-happens.md)) — one subject per build, a week of retention, read back by `builds --log <id>` with a consumer that is gone when the reading is done |
+| `KV_<module>_<name>` | `$KV.<module>_<name>.>` | the newest value per key — as many past values as the owner declared — no age unless the owner declared one; a value at most 256 KiB, a bucket at most 64 MiB | a module's state (ADR 0201): one per name in a manifest's `state`, created from the catalogue on every raise, so it exists before its owner runs anywhere; kept when the module is unassigned, because what it holds is data |

 Tool calls and heartbeats stay on core NATS: a lost heartbeat is the next heartbeat; a lost tool
 call is a timeout the caller already handles.
@@ -234,6 +247,14 @@ expresses this exactly, per subject, and better than a vhost could:
  permissions for each consumed event's subject, its tool subjects, and that same inbox prefix.
  Nothing else. A module that tries to publish outside its emits is refused by the server, not by
  convention.
+- **A module's state** (ADR 0201), for whichever principal carries the module — today the machine's
+  runtime, whose grant is the union of its modules': binding to the bucket, reading a key directly,
+  and an ordered consumer for listing and watching, created and deleted on the bucket's own stream
+  and nothing else's; and, for the owner's instances only, publishing under the bucket's own
+  `$KV.<bucket>.>`. *Measured 2026-10-04 against a running server:* without the consumer-delete
+  grant a watch cannot be stopped cleanly, and a write the server refuses reaches the writer as a
+  timeout rather than a refusal — so the runtime refuses first, from the membership, and the grant
+  is the second line.
 - **The controller's user** owns `mesh.control.>`, `mesh.node.>` and the streams, and may submit work
  to the seats the mesh's own flows use — a build, for one (ADR 0121).
  **A host's user** may publish its own `mesh.control.<node>.>` and subscribe its own
@@ -14,7 +14,7 @@ decisions:
  - 02-DECISIONS/0084-which-provider-serves-a-consumer.md
  - 02-DECISIONS/0046-a-module-configuration-is-its-assignments-not-its-manifest.md
  - 02-DECISIONS/0038-the-mesh-assigns-the-port.md
-  - 02-DECISIONS/0201-a-provider-declares-what-it-derives-for-each-consumer.md
+  - 02-DECISIONS/0202-a-provider-declares-what-it-derives-for-each-consumer.md
 ---

 # 27 — A module requires, the mesh resolves
@@ -208,7 +208,7 @@ the placeholder allows: the definition says which values reach which requirement
 does. *How it is checked:* the unit tests named in issue 173, and the plan comparison that closed it.

 *A provider says once what it derives for each consumer (2026-10-02,
-[ADR 0201](../../02-DECISIONS/0201-a-provider-declares-what-it-derives-for-each-consumer.md),
+[ADR 0202](../../02-DECISIONS/0202-a-provider-declares-what-it-derives-for-each-consumer.md),
 [issue 124](../../04-ISSUES/124-a-consumer-cannot-be-told-what-its-provider-derived/00-report.md)):*
 where a provider **names the resource** it gives each consumer — a bucket, a database, a vhost — the
 name is derived per consumer, and a literal `serves` block could not carry it. A served value may
@@ -221,7 +221,7 @@ its binding's served facts and as `${bound:<provision>:<key>}` in any file it wr
 as `derived` on that consumer's entry in its contributions file, so its provisioner is told the name
 rather than recomputing it. A consumer that writes the derived value into its own definition instead
 of asking for it is refused, naming the placeholder to use. *How it is checked:* the unit tests in
-ADR 0201's "how this is checked", each run against the unchanged controller first.
+ADR 0202's "how this is checked", each run against the unchanged controller first.

 ## How a definition reads what was resolved

@@ -11,8 +11,10 @@ code:
  - mesh-host internal/apply/apply.go
  - mesh-tools src/main.ts
  - mesh-catalog modules/mesh-catalog
-updated: 2026-10-02
+  - mesh-tools node-tools/internal/runtime (a module's state, ADR 0201)
+updated: 2026-10-04
 decisions:
+  - 02-DECISIONS/0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md
  - 02-DECISIONS/0160-the-mesh-issues-an-assignments-subjects-and-a-runtime-serves-what-it-is-issued.md
  - 02-DECISIONS/0126-a-module-declares-its-own-seats.md
  - 02-DECISIONS/0131-everything-on-the-mesh-speaks-to-the-broker-seat.md
@@ -67,6 +69,8 @@ the catalogue, and the mesh would have hundreds of copies of a decision it made
 | `tools: status` | queue-group subscription on `mesh.mod.<module>.tool.status` |
 | seat `telegram-sender`, `accepts: send` | work-queue consumer on `mesh.seat.telegram-sender.accept.send` |
 | `uses: telegram-sender` | publish on that seat's `accept` subjects, and nothing else |
+| `state: servers` | a key-value bucket for the module, created by the controller; its instances write and read it |
+| `reads: billing.orders` | read and watch billing's `orders` bucket, and nothing else of it |

 **Wildcards, and they are the mesh's rather than a bus's.** *Added 2026-09-27, from
 [issue 127](../../04-ISSUES/127-a-module-event-derives-a-subject-nothing-publishes/00-report.md).* A
@@ -221,7 +225,7 @@ service" versus "one worker per machine".
 | credential | sealed, per consumer | none | none | none | none |
 | reply | — | none | none, or an event later | a report | awaited |
 | retention | — | age and size | work queue, explicit ack | **last per subject** | none |
-| declared | `provides`/`requires` | `emits`/`consumes` | seat `accepts` / `uses` | the mesh's own | `serves` |
+| declared | `provides`/`requires` | `emits`/`consumes` | seat `accepts` / `uses` | the mesh's own; a module's `state` / `reads` | `serves` |

 **Job** is the one [ADR 0041](../../02-DECISIONS/0041-events-are-a-relationship.md) had no room
 for. Its table has events at 1:many and provisions at 1:1; a module submitting work to a service
@@ -236,6 +240,31 @@ last-per-subject retention, and a node that has seen sequence *n* refuses *n−1
 That is the wire-level answer to
 [issue 107](../../04-ISSUES/107-a-declaration-carries-no-order/00-report.md).

+**A module declares state too.** *Added 2026-10-04,
+[ADR 0201](../../02-DECISIONS/0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md).*
+State was the mesh's alone, and modules had the same need with nowhere to put it: an MCP server
+registered for every machine, sent as an event, never reached a machine assigned afterwards — its
+consumer did not exist yet when the event passed — and a licence binding sent as events replays a
+week of rotations where only the latest matters. So a module names the state it **owns** with
+`state`, and another module's it **reads** with `reads: <module>.<name>`. Each is a key-value bucket
+the controller creates from the catalogue, mesh-wide, existing from registration so a reader can
+watch before the owner runs anywhere ([design 25](25-the-bus-on-nats.md) §3). Every instance of the
+owner writes; a reader reads and watches. A key may name a machine by the module's own convention;
+the mesh keeps one bucket per name, not one per machine, because "every server, for every machine"
+is then one list rather than a walk.
+
+What a module sees is what it named. Its assignment's membership lists its buckets by those names,
+with whether it may write, and the runtime answers `get`, `put`, `delete`, `keys` and `watch` for
+them on the bundle's channel — refusing, with the reason, a name it was not issued or a write to a
+bucket it only reads. A watch hands the current values first, then every change: a bundle that starts
+late, or starts again, has the whole of the state before it has any of the news.
+
+The owner says how many past values a key keeps and how long a value lives, as a seat says how long
+its backlog survives (§3); the mesh caps a value's size and a bucket's. **A bucket outlives its
+module's assignment** — what a module stored is data
+([ADR 0030](../../02-DECISIONS/0030-data-outlives-the-mesh-that-declared-it.md)) — and one whose
+declaration is gone is reported, never removed by the mesh.
+
 ## 5. Seats

 A module declares a seat with its protocol, and the mesh enforces one holder at its scope
@@ -454,6 +483,14 @@ sealing key leaks, that stream is an archive rather than a moment. So:
  existing discipline — *fetched from it, not carried* — applied to the one payload where carrying
  it is worst.

+**A key-value bucket is a stream, so the same holds for it.** *Added 2026-10-04,
+[ADR 0201](../../02-DECISIONS/0201-a-module-keeps-its-current-state-in-key-value-buckets-it-declares-and-reaches-through-the-runtime.md).*
+No secret is put in a module's state, sealed or not: state is exactly what a machine joining a year
+later reads in full. A value that needs a secret names it, and the secret travels on request/reply.
+Sealed values are plain text to anything inspecting them, so this is checked only partly — the
+runtime refuses a value carrying a field whose name says it is a credential, which catches the
+ordinary mistake and not a determined one.
+
 **The bootstrap, which is circular and has a precedent.** The vault makes every secret
 ([ADR 0113](../../02-DECISIONS/0113-the-vault-makes-every-secret.md)), including the bus's own
 passwords. The vault is a module, and a module needs a bus account, whose password the vault
@@ -523,3 +560,9 @@ billing existing under that name.
  on, and exactly those two are rebuilt.
 - **A stale declaration is refused.** A bed: replay sequence *n−1* after *n*, and the node refuses
  it rather than applying it.
+- **A module reaches only the state it declared.** The composer's test: an owner's runtime may write
+  its buckets, a reader's may only read, and nothing else is granted; the runtime's test over a real
+  bus: a name not issued and a reader's write are refused with the reason.
+- **State is current at once.** The runtime's test over a real bus: a watch hands the current values
+  without deletions, then an end-of-current marker, then changes. Live: a machine assigned after a put
+  reads it at start.
@@ -2,8 +2,9 @@
 layer: to-be
 status: designed
 code: []
-updated: 2026-10-02
+updated: 2026-10-04
 decisions:
+  - 02-DECISIONS/0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md
  - 02-DECISIONS/0181-the-operator-account-is-a-node-fact-and-a-home-is-a-placement-root.md
  - 02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md
  - 02-DECISIONS/0183-the-anthropic-licence-manager-is-a-module-and-hands-tokens-to-the-agent-over-the-bus.md
@@ -54,8 +55,10 @@ instruction file and the manager's tools:
 | the console's entry in the agent's user-scope state | the managed settings' tool-server key, from the console's provision (§4) |

 **The home.** Under [ADR 0182](../../02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md)
-every path under `~/.claude` is *found*, with one exception: the agent's credentials file, which the
-module's own code writes for a subscription licence (§5). The person's memory, history, projects, local
+the module owns the directory `~/.claude` — that it exists, that the operator owns it, its mode,
+`0700` — and declares it, so the mesh refuses a second module owning it. Of what is inside, it owns only
+the agent's credentials file, which its own code writes for a subscription licence (§5); every other path
+is *found*. The person's memory, history, projects, local
 settings, their own rules, skills and tool servers are never read or written by the mesh. **The six
 predecessor files are the operator's to remove, once, on each workstation**; the module's documentation
 lists them, and until they go the agent reads stale instructions beside the mesh's.
@@ -63,9 +66,12 @@ lists them, and until they go the agent reads stale instructions beside the mesh
 ## 2. What the module declares and what its code writes

 **Declared, applied by the host:** the agent's package (§7); the module's state directory; a facts file
-in that directory carrying the node's name, the operator account, the console's endpoint, the module's
-settings; the bus, the console's provision, and that it uses the `anthropic-licence-manager` seat.
-Nothing under the home, nothing under `/etc`.
+in that directory carrying the node's name and the console's endpoint, and a settings file carrying the
+role and the extra tool servers, merged from the module's settings layers — the bundle is told the two
+files' paths, because a bundle's words are paths and constants only (ADR 0192); the bus, the console's provision, and that it uses the `anthropic-licence-manager` seat.
+Two directories, declared so the ownership check sees them: the agent's managed directory under
+`/etc`, root's, and `~/.claude` under the operator's home, the operator's. No *file* resource under
+either: what is in them is written by the module's code (§2 below) or is the person's.

 **Written by the module's code**, from the facts file and the manager's hand-over, whenever either
 changes:
@@ -111,17 +117,20 @@ the playbooks in the record.

 ## 4. The console

-The module tells the agent where the console is, and the port is the console's to say. **The console
-provides a node-scoped provision** — its MCP endpoint on loopback — serving the port the machine gave
-it, and the module requires it. A requirement names what the consumer is coupled to
-([ADR 0027](../../02-DECISIONS/0027-a-provision-names-what-the-consumer-is-coupled-to.md)); co-location
-resolves it; a machine without the console refuses the module by name. [To-be 34](34-the-console.md) is
-amended in the same change; issue 192 (open) found the gap.
+> **Revised 2026-10-03, building it.** The vendor's managed-settings key for tool servers refuses any
+> URL that is not `https://`, including one on loopback, so it cannot carry the console. The module
+> owns the vendor's **exclusive** managed tool-server file instead (operator's choice): the console as
+> `mesh`, over HTTP on loopback, and every server in the module's `mcp_servers` setting — and no other.
+> A server added by hand, a project's own file and a plugin's servers stop loading; claude.ai's
+> connectors are kept by a managed setting. A person's own servers move into the setting, for the mesh
+> or for one node. Stdio straight to the bus, through the runtime's own client, was weighed and left
+> for later: it needs a verb the delivered runtime does not have, and a session holding its own bus
+> connection breaks on a credential rotation.

 **Other tool servers** a person wants on every machine, or on one, are a declared setting of this module
-— mesh layer or node layer — rendered into the same managed key. A module tool, `mcp_configure`,
-validates a server and sets the setting through the controller's settings verb, so the list stays
-declared state. The agent's own HTTP-only constraint for managed servers applies; a person's local
+— mesh layer or node layer — rendered into the same managed file. The person sets them with the
+controller's `settings` verb on this module, so the list stays declared state; the list is the operator's
+choice, set where every setting is set. The agent's own HTTP-only constraint for managed servers applies; a person's local
 command-based servers stay their own, in their own file.

 **The entry's name is `mesh`.** The hand-made entry both workstations carry today is named after this
@@ -131,36 +140,42 @@ it is the person's to remove, and until then the agent sees the mesh's tools twi
 ## 5. The licence: the consumer side

 [ADR 0183](../../02-DECISIONS/0183-the-anthropic-licence-manager-is-a-module-and-hands-tokens-to-the-agent-over-the-bus.md)
-decides it; to-be 39 is the manager's half. This module:
+decides it and [ADR 0206](../../02-DECISIONS/0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md) says how it moves; to-be 39 is the manager's half. This module:

- **makes a keypair** in its state the first time it runs and registers the public half with the seat;
- **serves `apply`**: the manager's hand-over, a token sealed to the module's key, with the licence's
-  name and kind. A rotation of the same licence is applied only if newer within one lineage; a switch is
-  applied regardless, because across licences the expiries are unrelated. The answer says applied or
-  refused and why, and never echoes a token;
- **pulls** at start and when its token nears expiry, by the seat's `current` verb, and keeps the last
-  token when the manager does not answer, saying so;
- **writes** for a subscription licence the credentials file as the operator, access-token-only; for the
-  API-key licence sets the key-helper in the managed settings to a small program that prints the key
-  from the module's state, so no file under the home is touched;
- **offers a login to the manager**: when the credentials file changes by a person's login, it reads the
-  account's identity from the agent's state file and offers the grant to the seat, sealed to the manager's
-  key, for adoption; the manager decides;
- **serves `licence_status`**: which licence and kind this node holds, when the token expires, whether
+- **makes a keypair** in its state the first time it runs, and sends the public half with every request
+  that is answered sealed;
+- **reports what the node holds**, as its own `holdings` state, one key for this node: the account's
+  identity read from the agent's state file, the kind, the refresh token's fingerprint and whether one is
+  present, the access token's fingerprint and expiry, the licence and generation it last applied, when the
+  credentials file last changed. Written at start — a node already logged in reports at once — and on every
+  change of the file. Never a token: the runtime refuses one anyway;
+- **hands over a grant only when asked**: `claude_code_grant` answers the manager, which gives its public
+  key, with the full grant in the credentials file sealed to that key — the one time a refresh token
+  leaves the node, for the manager to adopt by refreshing it;
+- **watches the manager's `bindings` state** for this node, and when the generation is newer than the one
+  it applied, asks the seat's `current` verb for the token, sealed to its own key. A rotation of the same
+  licence is applied only if newer within one lineage; a switch is applied regardless;
+- **writes** for a subscription licence the credentials file as the operator, **access-token-only** — so
+  the agent here never refreshes, and a refresh token appearing later is a person's login, reported like
+  any change; for the API-key licence sets the key-helper in the managed settings to a small program that
+  prints the key from the module's state, so no file under the home is touched;
+- **serves `claude_code_status`**: which licence and kind this node holds, when the token expires, whether
  the file matches what was handed over — by fingerprint, never by value.

-Switching is the seat's `switch` verb, asked through the console; this module only applies what it is
-handed.
+Switching is the seat's `switch` verb, asked through the console; this module only applies what the
+state says it should hold. *2026-10-04:* this replaces the manager's visits of 2026-10-03 (ADR 0183's dated
+note): the node reports, the manager asks for a secret only when a report shows one it does not hold, and
+a token is fetched by request when the state says it changed.

 ## 6. Scope, settings and the order of assignment

 **Every node with an operator account** ([ADR 0181](../../02-DECISIONS/0181-the-operator-account-is-a-node-fact-and-a-home-is-a-placement-root.md)).
-None has one today; the operator states them first. **Per node:** the role. **Per mesh or per node:**
+All four nodes carry one since 2026-10-03. **Per node:** the role. **Per mesh or per node:**
 extra tool servers. **Prerequisite:** the manager holds its seat and has adopted the licences.

 **Order:** the manager assigned and a refresh observed; the console's provision in the catalogue; this
 module on one workstation; the six predecessor files and the hand-made console entry removed there; a
-new session read to confirm it sees the mesh's instruction file, the console's tools under `mesh`, and
+new session read to confirm it sees the mesh's instruction file, the console's five tools under `mesh`, and
 its licence; then the rest.

 ## 7. The package
@@ -178,13 +193,13 @@ installer is rejected: it puts a self-updating binary under the person's home, i

 | Check | Defends |
 |---|---|
-| the module's definition names no node, path or login, declares nothing under a home or `/etc`, and no file resource carries a secret | ADR 0112, ADR 0155, ADR 0183 |
+| the module's definition names no node, path or login, declares no file under a home or `/etc` (only the two directories), and no file resource carries a secret | ADR 0112, ADR 0155, ADR 0183 |
 | on a lab machine with an account and a seeded home holding a person's rule file and the predecessor's leftovers: after assign, the managed directory holds the mesh's files, the home is byte-identical except the credentials file, which is owned by the operator and names no refresh token; after unassign, the managed directory's files are gone and the home is untouched | ADR 0182, the host's agnosticism |
 | on a lab machine with no account, the assignment is refused naming the fact | ADR 0181 |
 | a switch asked of the seat through the console changes the licence and the token on the node; no tool answer and no log line holds a token | ADR 0183 |
 | the API-key binding writes nothing under the home and the agent authenticates through the helper | ADR 0183 |
 | the console's provision resolves by co-location; a machine without the console refuses the module by name | ADR 0027, ADR 0152 |
-| a new session on the assigned workstation lists the console's tools under `mesh` and answers "which node am I" from the instruction file | the exit of the build |
+| a new session on the assigned workstation lists the console's five tools under `mesh` ([ADR 0195](../../02-DECISIONS/0195-the-meshs-tools-are-found-by-address-not-announced-whole.md)) and answers "which node am I" from the instruction file | the exit of the build |

 ## What this does not settle

@@ -2,7 +2,7 @@
 layer: to-be
 status: in-progress
 code: [mesh-host, mesh-controller, mesh-tools, mesh-catalog]
-updated: 2026-10-02
+updated: 2026-10-04
 decisions:
  - 02-DECISIONS/0173-the-operators-machine-is-the-meshs-and-a-module-is-what-it-declares.md
  - 02-DECISIONS/0174-a-node-varies-a-module-through-settings-and-kept-regions-never-an-edit.md
@@ -33,12 +33,16 @@ This is the design [to-be 29](29-a-node-has-operator-accounts.md) §2 called *a
 Worked on the first one, a shell. The `zsh` module declares:

 - a **package**, `zsh`;
- **files under the home**, owned by the account: the shell's rc file with the module's default
-  configuration, carrying a kept region for the operator's own lines, and `${setting:…}`
-  placeholders for the few values a node varies; the account and its home are machine facts the
-  controller resolves ([ADR 0112](../../02-DECISIONS/0112-a-module-definition-names-no-node-mesh-or-path.md),
-  to-be 29 §2);
- a **seat declaration**, `login-shell`, node-scoped, with its one verb; and a **claim** on it;
+- **files under the home**, owned by the account: the mesh's block at the start of the shell's rc
+  file with the module's default configuration and the slots other modules' code lands in, the
+  operator's own lines kept after it, and `${setting:…}` placeholders for the few values a node
+  varies; the account and its home are machine facts the controller resolves
+  ([ADR 0112](../../02-DECISIONS/0112-a-module-definition-names-no-node-mesh-or-path.md),
+  to-be 29 §2). Its environment is a contribution to the environment module, not lines of its own
+  ([ADR 0203](../../02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md),
+  [ADR 0204](../../02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md),
+  [to-be 41](41-the-shell-and-the-accounts-environment.md));
+- a **claim** on the mesh's node-scoped seat `node-login-shell`, with its one verb;
 - a **`user` shape** naming the shell, applied only where the module holds the seat;
 - a **tools bundle**, the artifact kind for interpreted code, with `execute` and the module's own
  `show-config`.
@@ -80,7 +84,8 @@ root escalates itself.

 ## 4. The seats of the environment

-Decided now: **`login-shell`** (module-declared; zsh, fish, bash; verb `execute`) and
+Decided now: **`node-login-shell`** (the mesh's own, ADR 0204; zsh, fish, bash; verb `execute`),
+**`node-environment`** (the mesh's own, ADR 0203; the environment module; no verbs) and
 **`node-service-manager`** (the mesh's own; systemd; verbs over units in both scopes). The rest
 are candidates from [research 018](../../01-RESEARCH/018-the-operators-machine-as-modules/04-the-seats-of-the-environment.md),
 one record each when its first holder is written: display server, display session, terminal
@@ -15,6 +15,7 @@ decisions:
  - 02-DECISIONS/0192-a-tools-bundle-declares-what-it-is-given-and-the-runtime-hands-it-to-that-bundle-alone.md
  - 02-DECISIONS/0193-every-bundle-the-runtime-serves-is-launched-and-the-runtime-knows-no-language.md
  - 02-DECISIONS/0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md
+  - 02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md
 ---

 # 38. Building the operator's machine
@@ -330,6 +331,13 @@ tool of each.

 ## WP5 — The shell, on a server first

+*Replaced on 2026-10-04 by [to-be 41](41-the-shell-and-the-accounts-environment.md).* A review before
+assigning found that the shell module would duplicate every machine's existing startup file, drop
+lines from it, leave the prompt uninstalled, and could not be unassigned
+([issue 228](../../04-ISSUES/228-a-login-the-mesh-set-is-never-given-back/00-report.md)). The shell,
+its environment, the modules that plug into it, and the host's fix are built and proven there. What
+follows is the original plan, kept for the record.
+
 *mesh-catalog #224, already written. Half a day to assign and prove.*

 **Order.** Assign `zsh` to one server; push; `login-shell.execute@<server> command="uptime"`
@@ -2,8 +2,9 @@
 layer: to-be
 status: designed
 code: []
-updated: 2026-10-02
+updated: 2026-10-04
 decisions:
+  - 02-DECISIONS/0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md
  - 02-DECISIONS/0183-the-anthropic-licence-manager-is-a-module-and-hands-tokens-to-the-agent-over-the-bus.md
  - 02-DECISIONS/0024-model-access-is-a-provision.md
  - 02-DECISIONS/0050-model-access-is-vendor-agnostic.md
@@ -74,22 +75,22 @@ Carried from the predecessor, where each rule was earned by an incident:

 ## 4. Handing a token to a node

-Every node that runs the agent module registers that module's public key with the seat when it first
-runs. From then on:
+*Amended 2026-10-04 by [ADR 0206](../../02-DECISIONS/0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md)*, replacing the manager's visits: **what each consumer
+should hold is the manager's state, and the token is fetched when it changes.**

- **On rotation**, the manager calls `claude-code.apply@<node>` on every node bound to the rotated
-  licence, with the new token sealed to that node's module key. The module answers *applied*, or
-  *refused* and why, and the manager records it.
- **On a switch**, the same call with the other licence's token, and the binding is the authority: the
-  module applies a bind without comparing expiries, because across two licences the numbers are
-  unrelated.
- **On a pull** — the module starting, or finding its token near expiry — the module calls the seat's
-  `current` verb for its binding and is answered sealed the same way.
- **Never as an event.** What the manager emits names the licence and the outcome and carries no token.
+- **The manager keeps a `bindings` state**, one key per consumer: the licence, its kind, and a
+  **generation** that increases with every rotation and every switch. Nothing in it is secret.
+- **The agent module on each node watches its own key.** When the generation is newer than the one it
+  applied, it asks the seat's `current` verb, sending its public key, and is answered with the token
+  sealed to it — request/reply, never an event. A node that was away reads its key when it is back and
+  asks once; a manager that is down leaves every node on its last token, which lives hours.
+- **On a switch** the agent applies the new licence's token without comparing expiries, because across
+  two licences the numbers are unrelated; within one licence it applies only a newer grant.
+- **No event announces a rotation or a switch.** What they announced is the state itself, and a node
+  needs the latest, not the history. What the manager still emits names an outcome and carries no token.

-A node whose module has not registered a key cannot be handed a token, and the manager says so by name
-rather than falling silent. A node whose module refuses — a wrong identity, a stale grant within one
-lineage — is recorded as drift and reported.
+A consumer that never asks is visible: its own report (§6) names the licence and generation it holds,
+and a node behind its binding is drift the manager reports.

 ## 5. Who gets which licence

@@ -116,27 +117,46 @@ already keeps.

 ## 6. Adopting a grant

-A licence enters the mesh one of two ways, and the token never passes through a prompt, a terminal or an
-argument:
+*Amended 2026-10-04 by [ADR 0206](../../02-DECISIONS/0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md)*: a licence is an account, learned from what the nodes
+report, and adopted by refreshing it.

- **From a node's login.** A person logs in on a node, as they always have. The agent module there reads
-  the account's identity from the agent's own state file, and offers the full grant to the seat sealed
-  to the manager's key. The manager adopts it into the licence the node is bound to **only if the
-  identity matches** that licence's recorded account; a licence not yet identified is identified by its
-  first adoption; a mismatch is refused and notified, because the predecessor once filed one account's
-  grant into another's row this way.
+- **Every node reports what it holds**, as the agent module's `holdings` state, one key per node: the
+  account's identity read from the agent's own state file, the kind, the refresh token's fingerprint and
+  whether one is present, the access token's fingerprint and expiry, the licence and generation it was
+  last handed, when the credentials file last changed. Written when the module starts — a node already
+  logged in reports at once — and on every change. Never a token.
+- **The manager reads every report at start and watches them.** A report with a refresh token whose
+  fingerprint the manager does not hold is a candidate: a new licence for an account it has none for, a
+  login made since for one it has. A manager launched for the first time holds no licence and takes every
+  report as a candidate.
+- **The secret is asked for, never published.** For a candidate the manager calls that node's agent
+  module, giving its own public key, and is answered with the grant sealed to it.
+- **Adopting is refreshing.** The manager exchanges the candidate's refresh token under its lease for
+  that account; success makes the returned grant the licence's and the manager its only rotation source;
+  failure records the candidate dead and adopts nothing. Candidates for one account are tried newest login
+  first, and the first that refreshes ends the search — the others are never exchanged.
+- **The latest login wins.** A bound node is handed an access token only and its file holds no refresh
+  token, so a refresh token appearing there later is a person's login; its report makes it a candidate,
+  and if it refreshes it replaces the licence's grant.
+- **A first binding follows the login**: a node with no binding whose report names the adopted account
+  is bound to it. Every later change is `bind`, `switch` or `release`.
+- **The identity guard** files a grant under the identity the node read; where the vendor's refresh
+  answer names the account too, a mismatch is refused and notified. Which source decided is audited.
 - **An API key** is delivered to the manager by the operator through the seat's `adopt` verb from a file
  on the manager's node, never as an argument.

 ## 7. What it emits and serves

-**Events**, no secret in any: `licence.rotated`, `licence.switched`, `licence.adopted`,
-`licence.failing`, `licence.refused`, `usage.read` — the audit logger records them all.
+**Events**, no secret in any: `licence.adopted`, `licence.failing`, `licence.refused`, `usage.read` —
+the audit logger records them all. *2026-10-04 (ADR 0206):* `licence.rotated` and `licence.switched` are
+gone; a rotation or a switch is a new generation in the `bindings` state.
+
+**State**: `bindings`, which it keeps; the agent module's `holdings`, which it reads.

 **The seat's verbs**, the contract every future holder must serve: `licences` (each with kind,
 identity, expiry, failures, who is bound), `bindings`, `bind`, `switch`, `release`, `refresh` (now, one
-or all), `usage` (current and history), `adopt`, `register` (a node's module key), `current` (a
-consumer's token, sealed, asked by the consumer's module).
+or all), `usage` (current and history), `adopt`, and `current` (a consumer's token, sealed to the key the
+consumer sends — ADR 0206). The manager asks a node for a candidate grant by the agent module's own tool.

 ## 8. Settings

@@ -0,0 +1,216 @@
+---
+layer: to-be
+status: designed
+code: []
+updated: 2026-10-04
+decisions:
+  - 02-DECISIONS/0206-a-node-reports-the-anthropic-grant-it-holds-and-the-licence-manager-adopts-a-licence-by-refreshing-it.md
+  - 02-DECISIONS/0183-the-anthropic-licence-manager-is-a-module-and-hands-tokens-to-the-agent-over-the-bus.md
+  - 02-DECISIONS/0181-the-operator-account-is-a-node-fact-and-a-home-is-a-placement-root.md
+  - 02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md
+  - 02-DECISIONS/0175-one-tool-runtime-per-node-serves-every-modules-tools-on-the-host-side.md
+  - 02-DECISIONS/0188-a-modules-own-code-is-bundles-in-any-language-and-a-tools-bundle-speaks-mcp-to-the-runtime.md
+  - 02-DECISIONS/0192-a-tools-bundle-declares-what-it-is-given-and-the-runtime-hands-it-to-that-bundle-alone.md
+  - 02-DECISIONS/0149-the-live-mesh-is-the-test-bed.md
+  - 02-DECISIONS/0027-a-provision-names-what-the-consumer-is-coupled-to.md
+---
+
+# 40. Building the operator's agent and its licence manager
+
+**The work of [design 36](36-the-operators-agent-on-a-machine.md) and [design 39](39-the-anthropic-licence-manager.md),
+broken into packages that each end at something a person can see run, in the order their
+dependencies allow.** The two designs are the authority on *what* is built; this document holds the
+packages, their order, their sizes and their proofs, and is wrong the moment it disagrees with them.
+It is the shape [design 38](38-building-the-operators-machine.md) gives the operator's machine.
+
+*Revised 2026-10-03, after design 38's WP1–WP4b ran:* the node's tool runtime is live on all four
+machines, tools are bundles it serves and each is given only the words its artifact declares, every
+bundle is a child the runtime launches over stdio and is the bus for
+([ADR 0193](../../02-DECISIONS/0193-every-bundle-the-runtime-serves-is-launched-and-the-runtime-knows-no-language.md),
+[ADR 0198](../../02-DECISIONS/0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md)),
+and the console offers five tools over addresses
+([ADR 0195](../../02-DECISIONS/0195-the-meshs-tools-are-found-by-address-not-announced-whole.md)). What changed
+in this plan: the wait on design 38's WP3 is over; the manager starts every exchange, by the operator's
+direction (ADR 0183's dated note); and the manager's daemon is a long-running bundle the runtime launches,
+which ADR 0198 decided the same day — nothing in this plan waits on another record.
+
+## How this is built, and where it is run
+
+**On the live mesh, by the operator's decision** ([ADR 0149](../../02-DECISIONS/0149-the-live-mesh-is-the-test-bed.md)).
+Every package is written with unit tests, committed on one branch per repository
+([playbook 07](../../00-META/process/07-feature-branches.md)), and proven on the machines: one
+workstation first for the agent, the control node first for the manager, then the rest. A broken agent
+module leaves a workstation's agent without the mesh's instructions or with a stale token until the next
+push; the person's own files under the home are out of the failure's reach, by
+[ADR 0182](../../02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md).
+
+Each package names what proves it. A package that cannot name its proof is divided until it can.
+
+## What exists already, measured
+
+Measured 2026-10-03 on the four machines and in the repositories.
+
+| Piece | Today | Becomes |
+|---|---|---|
+| the node's tool runtime | live on all four, a host process; **runs as the operator account**; listens for the console on loopback at a port its own code fixes; launches or imports every assigned module's tools bundle and hands each its declared words | serves the agent module's tools; gains one provision for its endpoint (WP1) |
+| the operator account | **stated on all four** — the runtime runs as it | read by the agent module from the runtime's own words |
+| escalation | passwordless `sudo` for the operator account on all four — a fact about the machines, checked by nobody | how the agent module writes its managed directory under `/etc` |
+| the agent itself | installed on all four, at four different versions, all above the one the managed tool-server key needs | declared as the module's package |
+| a bundle's words | paths and constants written with `${dir:…}` and `${port:…}` only; a fact the mesh knows reaches a bundle as a file whose path is a word | the agent module's facts file and settings file |
+| a bundle calling a tool | `mesh/ask` through the runtime that launched it (ADR 0198); no bundle holds a bus credential | how the manager visits every node |
+| a module's own long-running code | a bundle the runtime launches and restarts (ADR 0198); the runtime's subscription and grants built, the modules moving in design 38 WP4c's waves | the manager's daemon (WP3, WP4) |
+| the vendor's refresh, the sealed box, the grant file | `anthropic-manager` in the catalogue, built on the controller placement ADR 0183 moved away from; assigned to nothing | its client ported into the manager; the module retired (WP6) |
+| the credentials write, the strip, the identity read | `anthropic-consumer` in the catalogue; tested; assigned to nothing | ported into the agent module with its tests; the module retired (WP6) |
+| the predecessor's manager and consumer | the lease per licence, the expiry floor, the lineage comparison, the identity guard, three touchpoints, cooldowns | ported as logic with its tests |
+
+## The order the work allows
+
+```
+WP0  the operator names the licences and each node's role   (the live mesh)   ── an hour
+WP1  the runtime provides its endpoint                       (mesh-tools)       ── small
+WP2  the agent module                                        (mesh-catalog)     ──┐ WP2 needs WP1;
+WP3  the manager's code, built and tested                    (mesh-catalog)     ──┘ WP3 is independent
+                                                                                  │
+WP2 live: one workstation, configuration only — no licence yet                  ── the first live proof
+                                                                                  │
+WP4  the manager live on the control node   ── its daemon a long-running bundle (ADR 0198)
+WP5  the licence end to end on one workstation
+WP6  the rest of the nodes, and the predecessor's remains
+```
+
+## WP0 — The operator names the licences and each node's role
+
+*The live mesh. An hour, and it is the operator's.* The accounts are stated already. What remains: the
+names of the two subscription licences and the API key; each node's role, as the agent module's setting
+on the node layer once the module is registered.
+
+**Proof.** The module's settings list a role for every node; the licences have names.
+
+## WP1 — The runtime provides its endpoint
+
+*mesh-tools. An hour.*
+
+**What changes.** The `node-tools` manifest provides a node-scoped provision, `mcp-endpoint`, serving
+the port its code listens on, the way the local model server serves its API
+([ADR 0027](../../02-DECISIONS/0027-a-provision-names-what-the-consumer-is-coupled-to.md)). Co-location
+resolves it. The runtime's port stays what its code fixes; assigning it is
+[issue 192](../../04-ISSUES/192-the-meshs-tools-reach-a-person-only-by-a-registration-made-by-hand/00-report.md)'s
+second question and not this package's.
+
+**Proof.** The plan for a workstation carrying a consumer of `mcp-endpoint` shows it bound to the
+runtime's port; the controller's tests and the catalogue's checks pass.
+
+## WP2 — The agent module
+
+*mesh-catalog. A day and a half.*
+
+**What is written**, as design 36 says:
+
+1. **The manifest.** The agent's package. A state directory. A facts file in it, rendered by the mesh:
+   the node's name and the console's address from `mcp-endpoint`. A settings file in it, merged from
+   the module's settings layers: the node's role and the extra tool servers. A tools bundle whose
+   words name the two files, the state directory and nothing else. The two directories it owns declared — the agent's managed
+   directory and `~/.claude` — and **no file resource under either.**
+2. **The renderer**, run whenever the runtime collects the module's tools: from the two files, the
+   managed settings file (the tool servers under the entry `mesh`, the attribution trailers, the
+   key-helper for an API-key binding) and the managed instruction file, written under the agent's
+   managed directory through the account's escalation, only when their content changed.
+3. **The keypair**, made once in the state directory; X25519 and an authenticated cipher from the
+   language's own library, so the bundle carries no dependency.
+4. **The tools and the state** (*2026-10-04, ADR 0206*): `claude_code_status` (what is rendered, what
+   licence is held, when its token expires, fingerprints only); `claude_code_render` (render now);
+   `claude_code_grant` (the full grant in the credentials file, sealed to the key the manager gives).
+   The `holdings` state, written at start and on every change of the credentials file; a watch of the
+   manager's `bindings` key for this node, which asks the seat's `current` on a newer generation and
+   applies the sealed answer — only if newer within one lineage unless it is a switch; the credentials
+   write as the operator, access-token-only, atomic; the key-helper program for an API key.
+5. **The documentation**: the six predecessor files and the hand-made console entry a person removes.
+
+**Proof, before anything runs live.** Unit tests: the renderer writes the mesh's keys and nothing else;
+it writes nothing when nothing changed; the credentials write strips a refresh token and is atomic; the
+lineage cases from the predecessor; a sealed hand-over opens only with the module's key; no tool's answer
+contains a token. The catalogue's checks pass.
+
+**Proof, live, on one workstation, configuration only.** Assign the module; set the node's role; push.
+The agent's managed directory holds the two files; everything under the person's agent directory is
+byte-identical to before; a new session lists the console's five tools under `mesh` and answers *which node am
+I* from the managed instruction file. `claude_code_status` answers through the console. No licence is
+touched: the module writes the credentials file only when it is handed a token.
+
+## WP3 — The manager's code, built and tested
+
+*mesh-catalog. Two to three days.*
+
+**What is written**, as design 39 says: the manifest (the seat and its verbs, a database, a `secret`
+for the key the grants are encrypted with, a tools bundle and a long-running bundle for the daemon, both launched by the runtime, settings
+with defaults); the store's migrations; the refresh with its plan, lease, floor and cadence as pure
+functions; the vendor client from `anthropic-manager`; adoption from a file and from a node's waiting
+login with the identity guard; usage and its threshold; the seat's verbs. *2026-10-04 (ADR 0206):* in place
+of the visit, the watch of every node's `holdings`, adoption of a candidate by refreshing it (newest login
+first, once per account), the `bindings` state with a generation per consumer, and `current`.
+
+**Proof, before anything runs live.** Unit tests: two refresh runs started together rotate one grant
+once; a mismatching identity is refused; a worker bound to a dead licence is refused and never lent
+another; nothing the daemon emits carries a token; a hand-over sealed for one node opens with no other
+node's key.
+
+## WP4 — The manager live on the control node
+
+*The live mesh. Half a day.* The daemon is a long-running bundle the control node's runtime launches
+(ADR 0198); it calls each node's agent module by `mesh/ask`. If the runtime's half of ADR 0198 is not
+yet live on the control node when this package starts, this package waits for it: no tool container, no
+credential copied by hand.
+
+**Order.** Assign the manager on the control node; push. It reads every node's `holdings` and adopts each
+account the nodes are logged in to, by refreshing the newest login's grant (ADR 0206); each node with no
+binding is bound to the account it reported. Adopt the API key from a file there. A second subscription
+account enters by a login on a workstation carrying the agent module.
+
+**Proof.** Through the console: `anthropic-licence-manager.licences` lists three licences with identity
+and expiry; within the cadence the audit shows a rotation and a later expiry; a forced `refresh` is
+logged with the vendor's answer.
+
+## WP5 — The licence end to end on one workstation
+
+*The live mesh. Half a day. The proof of the whole.*
+
+**Order.** Record the checksums under the person's agent directory. Bind the workstation to a
+subscription licence. Remove the six predecessor files and the hand-made console entry. Start a session.
+
+**Proof.** Everything under the person's agent directory is byte-identical but the credentials file,
+which is owned by the operator, readable by nobody else, and names no refresh token. A session makes a
+model request. `switch` to the second subscription licence changes the token on the workstation within a
+minute, and neither the verb's answer nor either module's log holds a token. Switched to the API key, the
+credentials file is left as it was and the agent authenticates through the key-helper. Switched back.
+
+## WP6 — The rest of the nodes, and the predecessor's remains
+
+*The live mesh and mesh-catalog. One day.* The module on every node, the predecessor's files removed on
+the second workstation; a login under a licence's account collected and adopted, and one under the wrong
+account refused and notified; `anthropic-manager` and `anthropic-consumer` retired from the catalogue;
+designs 36 and 39 set to `implemented` with the as-is written
+([playbook 02](../../00-META/process/02-graduation.md)).
+
+**Proof.** `claude_code_status` answers on every node; the refusal's notification arrived; the catalogue
+has no module built on the old placement.
+
+## What is deliberately not here
+
+- **The package repository seat** for a distribution that does not carry the agent's package (design 36
+  §7). The four machines have the package; a fifth would refuse the module in its package manager's
+  words.
+- **Escalation as a checked fact.** The agent module's write under `/etc` relies on the operator
+  account's passwordless `sudo`, true on all four and checked by nothing. A machine without it refuses
+  the render in the tool's own words; making escalation a reported capability is design 38's to decide.
+- **An automated switch on exhaustion.** The readings are kept from WP4; the policy is a later record.
+- **Workers and the mesh's own sessions as consumers.** The manager knows them from WP3; the consumers do
+  not exist yet ([to-be 15](15-the-agent-session.md)).
+- **Whether a refresh token is single-use.** WP4 may measure it; the design holds either way.
+
+## How this list is kept true
+
+Each package's proof is run when the package is finished and its line here gains the date and the
+commit, as design 38 does. A package whose proof fails is not reworded; the failure is recorded under it
+and the package stays open. When WP2's live proof runs, design 36 moves to `in-progress` with its owning
+repository; when WP5's does, design 39 does too; and when WP6's does, both move to `implemented`, with
+the as-is written.
@@ -0,0 +1,238 @@
+---
+layer: to-be
+status: in-progress
+code: [mesh-host, mesh-controller, mesh-catalog]
+updated: 2026-10-04
+decisions:
+  - 02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md
+  - 02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md
+  - 02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md
+  - 02-DECISIONS/0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md
+  - 02-DECISIONS/0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md
+  - 02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md
+---
+
+# 41. The shell and the account's environment
+
+What it takes for the operator's shell to be modules, without a machine losing anything it does
+today. This design replaces the shell half of
+[to-be 38](38-building-the-operators-machine.md) WP5, and finishes the service-manager module of WP6
+short of its user-scoped units. The decisions are [ADR 0203](../../02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md)
+(the environment), [ADR 0204](../../02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md)
+(shell code and the seat) and [ADR 0205](../../02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md)
+(vendored software). The evidence is [research 025](../../01-RESEARCH/025-how-a-module-plugs-into-the-shell/00-overview.md).
+
+## What a node with a shell looks like
+
+```
+ toolchain, agent, …             prompt, plugins, version manager
+        │ environment                     │ shell (zsh, slot)
+        ▼                                 ▼
+ node-environment  ── holds ──  node-env           node-login-shell ── holds ── zsh
+        │                                                 │
+        ├─▶ ~/.config/mesh/environment.sh  ◀─ sourced from zsh's block in ~/.zshenv
+        └─▶ ~/.config/environment.d/50-mesh.conf  ◀─ read by the account's service manager
+                                                          │
+                                       ~/.zshrc: the mesh's block FIRST — defaults and the
+                                       three slots — then the operator's own lines, kept
+```
+
+**The environment module** (`node-env`) holds `node-environment`. It has no package and no process.
+Its two files are written by the host from placeholders the controller fills.
+
+**The shell module** (`zsh`) holds `node-login-shell`. It:
+
+- installs the package;
+- sets the login shell through the `user` shape;
+- writes two blocks:
+  - one in `.zshenv`, sourcing the environment;
+  - one at the start of `.zshrc`, holding the defaults every machine shares today: the title, the
+    keybindings, the aliases and the two small functions, with the three slots in place;
+- contributes its own environment: the editor, the configuration home, and `~/.local/bin` plus the
+  two script directories on `PATH`;
+- serves `execute` and its own `zsh_config`.
+
+**The prompt module** (`powerlevel10k`) ships the theme as a pinned vendored archive, and the prompt's
+configuration as its own file in a directory it owns. It contributes the zsh code that loads both.
+
+**Two plugin modules** (`zsh-autosuggestions`, `zsh-syntax-highlighting`) each install their
+distribution package and contribute one line. Syntax highlighting goes in the `last` slot, which is
+what its upstream asks for.
+
+**What stays the operator's** is everything below the block in `.zshrc`, and `~/.zshrc.local`, which
+the operator's lines source as they do today. On every machine today that means:
+
+- the version manager's lines and the toolchain's `PATH` entry, until those modules exist;
+- the two variables naming the operator's own script library;
+- the agent's title variable;
+- the port aliases;
+- the workstation's desktop variables, which live in `~/.zshrc.local` already.
+
+Nothing is lost at any step, because a line moves out of the operator's part only when a module
+carries it.
+
+**The migration is a person's act**, listed in the zsh module's documentation (ADR 0182): after the
+first push, delete from `.zshrc` the lines the block now carries. Until then they run twice, which is
+harmless and visible.
+
+## Work packages
+
+```
+WP1  the host gives a login back                 (mesh-host)            issue 228
+WP2  the controller composes environment and shell code (mesh-controller)
+WP3  the modules                                 (mesh-catalog)         needs WP2 to resolve
+WP4  the service manager's module, finished      (mesh-catalog)         independent
+WP5  assign and prove                            (operator-gated)       needs WP1–WP3 merged and rolled
+```
+
+WP1, WP2 and WP4 are independent, and are built in parallel on one feature branch per repository
+([playbook 07](../../00-META/process/07-feature-branches.md)). WP3 is written in parallel and proven
+against WP2's controller before anything is published.
+
+## WP1 — The host gives a login back
+
+*mesh-host. Half a day. [Issue 228](../../04-ISSUES/228-a-login-the-mesh-set-is-never-given-back/00-report.md).*
+
+**What changes.**
+
+- The `user` shape records, in its applied record, the login shell it found whenever it changes it.
+- Removing a `user` never deletes the account, whether or not the mesh created it. If the account's
+  shell is still the one the mesh set, and the recorded shell is still executable, the recorded shell
+  is set back. Otherwise the shell is left as it is, and the outcome says why.
+- Before a shell is set, it is refused unless it is executable and listed among the machine's shells.
+  The exception is a shell that refuses logins (`nologin`, `false`): the distribution does not list
+  those, and the controller's own account uses one, so it need only be executable. The refusal fails
+  that resource and leaves the account untouched.
+- A directory the host creates on the way to a file, a block or an archive inside an account's home
+  belongs to that account, the home itself included when the host makes it. A directory that was
+  already there keeps its owner and mode (ADR 0182). Until this, a fresh account's `~/.config` or
+  `~/.local/share` would have been created as root's.
+- Giving the shell back is reported, never fatal. A failed `usermod` on removal is named in the
+  outcome and the record is dropped, because a fatal removal is exactly the wedge issue 228 is about.
+
+**Proof.** The host's tests:
+
+- an undeclared `user` no longer stops the apply;
+- the found shell comes back;
+- a shell changed by a person since is left alone;
+- a missing shell is refused before `usermod` runs;
+- a created account survives its removal.
+
+## WP2 — The controller composes environment and shell code
+
+*mesh-controller. One to two days.*
+
+**What changes.**
+
+- **The seat table.** It gains `node-environment` (node scope, no verbs) and `node-login-shell`
+  (node scope, the verb `execute`). A module may no longer declare a seat named `login-shell` or
+  `node-login-shell`. Both new seats are seeded into a live store by the existing additive seeding.
+- **The manifest.** It gains two contribution fields, each refused at parse when malformed:
+  - `environment`, with `variables` and `path`: a variable name must be a POSIX name and not `PATH`;
+    a value may not contain `$`, a quote, a backslash or a line break; a path entry's place is
+    `start` or `end`;
+  - `shell`: each entry names a known shell, a known slot, and non-empty code.
+- **Composition.** It fills `${environment:posix}`, `${environment:systemd}` and
+  `${shell:<shell>:<slot>}` in the claiming holder's file contents, from every module assigned to
+  the node. The rendering is ADR 0203's and ADR 0204's: module order, a naming line per contribution,
+  `PATH` entries added only when missing. `${machine:…}` in a contributed value is resolved first.
+- **Refusals.** A variable set by two modules on one node is refused, naming both. A placeholder in a
+  module that does not claim the matching seat is refused, both at the catalogue check and at
+  composition.
+
+**Proof.** The controller's tests:
+
+- both environment renderings, byte for byte, from a fixed set of contributions;
+- the POSIX rendering sourced twice by `sh` leaves `PATH` unchanged;
+- slot order and per-shell filtering;
+- each refusal, by name;
+- the seat table carries both seats and refuses a module declaring either.
+
+The catalogue check over the whole catalogue passes.
+
+## WP3 — The modules
+
+*mesh-catalog. One day.*
+
+**What changes.**
+
+- **`node-env`, new.** It claims `node-environment` and declares two owned files: the POSIX file at
+  the path the seat fixes, and the service manager's file, each holding its placeholder. It declares
+  no tools.
+- **`zsh`, rewritten.**
+  - It drops its seat declaration and claims `node-login-shell`.
+  - Its environment moves to a contribution.
+  - It writes a `.zshenv` block that sources the environment file.
+  - Its `.zshrc` block goes at the start and carries today's shared defaults, with the three slots.
+  - It keeps the `user` shape.
+  - `execute` runs `zsh -lc` in the account's home, with the runtime's session words for the user
+    manager. Its timeout is bounded below the runtime's thirty-second call limit; its output is cut at
+    a bound and marked as cut; on timeout it kills the process group.
+  - Tests cover the tool over real child processes and the manifest's shape.
+  - Its documentation lists the one-off migration.
+- **`powerlevel10k`, new.**
+  - The theme is vendored at a pinned upstream release, with its licence, as an archive artifact
+    unpacked into the module's directory under the account's home.
+  - The prompt configuration is today's file, as its own owned file in the same directory.
+  - It contributes the zsh code that loads the theme and the configuration.
+  - Today's file has the instant-prompt cache commented out, so the module does not turn it on.
+- **`zsh-autosuggestions` and `zsh-syntax-highlighting`, new.** Each declares its package and
+  contributes its loader from the distribution's path, in the `normal` and `last` slots.
+
+**Proof.** The controller's catalogue check over the whole catalogue passes. The modules' tests pass.
+A rehearsal composition for a node holding all five shows:
+
+- the `.zshrc` block with the prompt in `normal` and highlighting in `last`;
+- the environment file with the shell's `PATH` entries;
+- the service manager's file.
+
+## WP4 — The service manager's module, finished
+
+*mesh-catalog. Half a day. From the review of 2026-10-04.*
+
+**What changes.**
+
+- System-scope `start`, `stop`, `restart`, `enable` and `disable` escalate with `sudo -n` when the
+  runtime is not root, as the packet filter and intrusion modules do. They name a refusal by how it
+  failed.
+- User scope reaches the account's manager by its runtime directory, which the runtime's environment
+  lacks.
+- A failed `systemctl` is an error, not an empty list.
+- The package resource goes: the service manager is always present, and it collided with the network
+  module's identical declaration on a machine running both.
+- `status` says whether the mesh declares the unit. The restore note is attached only to such a unit.
+- Tests cover a fake runner.
+
+The user-scoped units of mesh-host #72 stay to-be 38's WP6.
+
+**Proof.** The module's tests. Live, after WP5:
+
+- `node-service-manager.units` answers in both scopes on a workstation and on a server;
+- `restart` of a harmless unit answers `ok`.
+
+## WP5 — Assign and prove
+
+*Operator-gated. Nothing here runs without the operator's go-ahead.*
+
+**Order.**
+
+1. Merge WP1 and roll the host.
+2. Merge WP2, and push the controller.
+3. Merge WP3 and WP4, and build the new modules by hand: a new catalogue module's first build is asked
+   for, not automatic.
+4. On one server, assign `node-env`, `zsh`, `zsh-autosuggestions` and `zsh-syntax-highlighting`, and
+   push. Then check:
+   - `node-login-shell.execute@<server> command="echo $PATH"` shows the shell's entries;
+   - `.zshrc` begins with the block;
+   - the operator's lines follow untouched;
+   - the environment file and the service manager's file exist.
+5. The operator deletes the duplicated lines, per the zsh module's documentation.
+6. The other server, then the two workstations, the workstations also with `powerlevel10k`.
+7. Assign `systemd` everywhere, and prove WP4.
+8. Unassign one plugin module on one machine. Its line leaves the block at the next push, and nothing
+   else changes.
+
+The follow-up records to-be 38 names are still owed:
+
+- what a shell module assigned beside the holder does;
+- how a person's own environment variable is a setting rather than a line, once issue 168 closes.
@@ -0,0 +1,105 @@
+---
+layer: to-be
+status: in-progress
+code: [mesh-catalog, mesh-controller, mesh-host]
+updated: 2026-10-04
+decisions:
+  - 02-DECISIONS/0173-the-operators-machine-is-the-meshs-and-a-module-is-what-it-declares.md
+  - 02-DECISIONS/0040-what-a-module-is.md
+  - 02-DECISIONS/0112-a-module-definition-names-no-node-mesh-or-path.md
+  - 02-DECISIONS/0175-one-tool-runtime-per-node-serves-every-modules-tools-on-the-host-side.md
+  - 02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md
+  - 02-DECISIONS/0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md
+  - 02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md
+  - 02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md
+  - 02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md
+  - 02-DECISIONS/0207-a-module-depends-on-the-node-seats-that-apply-its-resources.md
+  - 02-DECISIONS/0208-the-graphical-session-is-one-module-per-piece-on-the-meshs-seats.md
+---
+
+# 42. The machines' modules, in order
+
+The order in which the modules of [research 026](../../01-RESEARCH/026-the-graphical-session-as-modules/00-overview.md)
+and [research 027](../../01-RESEARCH/027-the-system-layer-as-modules/00-overview.md) are built and rolled
+out, as the operator set it on 2026-10-04.
+
+Three phases, in order, each built from the bottom up (the most core module first):
+
+1. the modules every machine shares;
+2. those both workstations share;
+3. those of one machine model.
+
+The shell came first ([to-be 41](41-the-shell-and-the-accounts-environment.md)). Each module's
+definition, improvements and tools follow the research. A position that needs a new mechanism (a new
+seat, a gated assignment, generalised contributions) gets its record when its first module needs it,
+not before. Modules that need none go ahead now.
+
+## How every module moves
+
+1. Written in the catalogue, with its tools and their tests, and checked by the controller's catalogue
+   check.
+2. Merged, which builds it.
+3. Assigned to **the first workstation, the proving machine**, and pushed. Its tools and files are
+   proven there.
+4. Then assigned to every other machine it applies to, and pushed.
+
+The operator delegated the go-ahead for each step on 2026-10-04 ("non-important decisions, easily
+reversed"). Each step is reported.
+
+**Adopting is also improving** (research 026, 027 overviews): every module lists what it fixes over
+today, and leaves no predecessor copy of what it now owns.
+
+## Phase 1 — every machine
+
+In order:
+
+| | module | owns | improves |
+|---|---|---|---|
+| 1 | `sudo` | the operator account's escalation, as a drop-in it owns | declares what three modules' tools assume and nothing stated |
+| 2 | `localization` | locale, time zone, console keymap | one machine on another zone and keymap |
+| 3 | `time-sync` | timesyncd and its servers | two different daemons across four machines |
+| 4 | `pacman` | the package manager's configuration, mirrors and their refresh, cache cleaning | mirrors generated once and never again; caches never cleaned |
+| 5 | `logrotate` | the timer and base configuration | rotation running on one machine of four |
+| 6 | `avahi` | the daemon | on all four, owned by none |
+| 7 | `systemd` | the service manager's tools (to-be 41 WP4) | built, assigned nowhere |
+| 8 | `docker` | the runtime's packages, base configuration, group | four configurations, one owner on one machine |
+| 9 | `ssh-client` | everything under `~/.ssh` (research 027/03) | a predecessor's entries winning over the mesh's; stale keys |
+| 10 | scripts | the operator's own scripts, shared and per role (research 027/03) | under no version control, copied by hand |
+| 11 | `kernel` | kernel, microcode, boot entries | two machines without microcode |
+
+`systemd`, `pacman` and `docker` hold the three seats that apply resources
+([ADR 0207](../../02-DECISIONS/0207-a-module-depends-on-the-node-seats-that-apply-its-resources.md)):
+every module that declares a service, a package or a container depends on them being held on its node.
+They go on every machine before the rest, and once they have, an unmet dependency is refused rather
+than reported.
+
+`kernel` is last because a mistake in it costs a boot. `docker` stays a module without the runtime seat
+until ADRs 0165 and 0166 are accepted.
+
+## Phase 2 — both workstations
+
+In order:
+
+1. `fonts`;
+2. `xorg` with autorandr;
+3. `lemurs`;
+4. `i3`;
+5. `xterm`;
+6. the theme module;
+7. `picom`, `rofi`, `dmenu`, `dunst`, the lock module, `xclip`, the clipboard manager, `feh` and
+   `i3status-rust`;
+8. `gnome-keyring`;
+9. `docker-compose`, `snapd`, `flatpak`, `cups`, `bluetooth`.
+
+The seats, gating, contributions and session start are [ADR 0208](../../02-DECISIONS/0208-the-graphical-session-is-one-module-per-piece-on-the-meshs-seats.md).
+
+## Phase 3 — one machine model
+
+The laptop's hardware module (vendor daemon, GPU mode, charge limit, logind, brightness and vendor keys)
+and `memory-pressure` (research 027/03).
+
+## How it is checked
+
+Each module's own tests and the catalogue check, at merge. On the proving machine, each tool answered
+through the mesh and each owned file checked in place, before any other machine is assigned. This
+document's tables are updated as each module lands.
@@ -43,6 +43,8 @@ document is written and this one's status becomes `implemented`.
 | [`32-what-a-module-declares.md`](32-what-a-module-declares.md) | **Proposed.** What a module declares and what the bus derives from it: three namespaces, subjects from local names, queues never declared, the five relationships, and the build-publish-deploy lifecycle on one bus | [ADR 0126](../../02-DECISIONS/0126-a-module-declares-its-own-seats.md), [ADR 0127](../../02-DECISIONS/0127-amqp-is-a-provision-not-the-bus.md), superseded by [ADR 0131](../../02-DECISIONS/0131-everything-on-the-mesh-speaks-to-the-broker-seat.md) (superseding [ADR 0125](../../02-DECISIONS/0125-the-bus-is-the-only-broker.md)), [ADR 0041](../../02-DECISIONS/0041-events-are-a-relationship.md) |
 | [`37-the-operators-machine.md`](37-the-operators-machine.md) | **In progress.** Every configurable thing on a node is a module, the home included; one default per module varied by settings or kept regions; roles a machine has once as seats with tool contracts; one tool runtime per node on the host side | [ADR 0173](../../02-DECISIONS/0173-the-operators-machine-is-the-meshs-and-a-module-is-what-it-declares.md), [0174](../../02-DECISIONS/0174-a-node-varies-a-module-through-settings-and-kept-regions-never-an-edit.md), [0175](../../02-DECISIONS/0175-one-tool-runtime-per-node-serves-every-modules-tools-on-the-host-side.md), [0176](../../02-DECISIONS/0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md), [0177](../../02-DECISIONS/0177-a-unit-may-be-user-scoped-and-the-service-manager-is-a-node-seat.md) |
 | [`38-building-the-operators-machine.md`](38-building-the-operators-machine.md) | **In progress.** The work of design 37 as packages: the runtime serves many modules, the controller composes one per node, the console becomes its serving mode, the packet filter moves first, then the shell and the service manager — tested on the live mesh by the operator's decision | [ADR 0175](../../02-DECISIONS/0175-one-tool-runtime-per-node-serves-every-modules-tools-on-the-host-side.md), [0160](../../02-DECISIONS/0160-the-mesh-issues-an-assignments-subjects-and-a-runtime-serves-what-it-is-issued.md), [0149](../../02-DECISIONS/0149-the-live-mesh-is-the-test-bed.md) |
+| [`41-the-shell-and-the-accounts-environment.md`](41-the-shell-and-the-accounts-environment.md) | **In progress.** The shell and the account's environment as modules: an environment module every module contributes variables and `PATH` entries to, shell code contributed to the login shell in named slots, the prompt and plugins as modules, the host giving a login back, and the service manager's module finished | [ADR 0203](../../02-DECISIONS/0203-the-accounts-environment-is-one-modules-and-every-module-contributes-to-it.md), [ADR 0204](../../02-DECISIONS/0204-a-module-contributes-shell-code-to-the-login-shell-in-named-slots.md), [ADR 0205](../../02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md) |
+| [`42-the-machines-modules-in-order.md`](42-the-machines-modules-in-order.md) | **In progress.** The order the machines' modules of research 026 and 027 are built and rolled out: every machine's first (sudo, localization, time sync, pacman, logrotate, avahi, systemd, docker, `~/.ssh`, scripts, kernel), then both workstations', then one machine model's; each proven on one workstation before the rest | [ADR 0173](../../02-DECISIONS/0173-the-operators-machine-is-the-meshs-and-a-module-is-what-it-declares.md), [ADR 0182](../../02-DECISIONS/0182-inside-a-home-the-mesh-owns-what-it-places-and-holds-the-rest-as-found.md), [ADR 0205](../../02-DECISIONS/0205-software-the-distribution-does-not-package-ships-as-a-pinned-archive-of-the-module.md) |

 ## Not yet written

@@ -2,7 +2,7 @@
 status: resolved
 opened: 2026-09-26
 located-in: [mesh-controller internal/catalogue, mesh-sdk src/provisioner, mesh-catalog modules/minio]
-fixed-by: 02-DECISIONS/0201-a-provider-declares-what-it-derives-for-each-consumer.md
+fixed-by: 02-DECISIONS/0202-a-provider-declares-what-it-derives-for-each-consumer.md
 amended-design: 03-DESIGN/01-to-be/27-a-module-requires-the-mesh-resolves.md
 ---

@@ -64,7 +64,7 @@ compares it to what the provider will actually create. The one wrong instance wa
  bucket in its own configuration against the one the provider would create is a check that could
  exist today, for any interface, without the mechanism above.

-## Answered, 2026-10-02 — [ADR 0201](../../02-DECISIONS/0201-a-provider-declares-what-it-derives-for-each-consumer.md)
+## Answered, 2026-10-02 — [ADR 0202](../../02-DECISIONS/0202-a-provider-declares-what-it-derives-for-each-consumer.md)

 The channel is the provider's own `serves` block, which may now name the consumer the mesh is
 serving: `${consumer:as}` and `${consumer:as:dns}`. The mesh fills it once, where it knows who the
@@ -1,8 +1,9 @@
 ---
-status: located
+status: resolved
 opened: 2026-09-30
 located-in: [mesh-host internal/apply (no removal for an archive)]
 fixed-by:
+  - mesh-host#90
 amended-design:
 ---

@@ -54,3 +55,15 @@ argue for elsewhere: the mesh gives back what it found.
 A module with an archive is assigned, pushed, unassigned and pushed again; what the archive put on the
 machine is gone, anything that was in the directory beforehand is still there, and the apply that
 removed it applied everything else in the same declaration.
+
+## Resolved
+
+*2026-10-04.* Hit again live the same day: a race between two pushes delivered a declaration without
+a just-assigned module, and removing its tools bundle stopped a workstation's apply until the next push.
+mesh-host#90 records what an archive unpacked: its files, the directories it made, whether the host
+made the target and its parents. Undeclaring removes exactly those, never a file it did not place and
+never a directory that was there before, and a failed removal is reported, never fatal.
+
+An archive recorded before the change learns its list from its own bytes on the next apply while it is
+still declared. One already orphaned is left in place, said and forgotten. Applying an archive no longer
+deletes files the mesh did not place in its target directory (ADR 0030).
@@ -0,0 +1,64 @@
+---
+status: open
+opened: 2026-10-04
+located-in: [mesh-host internal/apply/apply.go, mesh-host internal/apply/schedule.go]
+fixed-by:
+amended-design:
+---
+
+# 224 — An apply arriving during a maintenance window reopens it, by recreating the container the window is holding still
+
+## What was observed
+
+Reviewing [ADR 0189](../../02-DECISIONS/0189-the-store-keeps-what-the-records-name.md)'s
+`while-stopped` before merging it, 2026-10-04. Found by reading, not by running.
+
+A scheduled step may hold its module's containers still while it runs. The host stops them, runs
+the step, starts them again. Nothing tells the **apply** that a window is open, and the apply's
+rule for a container it finds stopped is to replace it:
+
+```
+case existed && (before.Spec == want || legacy) && before.Running && len(reasons) == 0:
+        out.Action = "unchanged"
+case existed:
+        rm -f
+```
+
+`before.Running` is false for a container a window is holding, so the second branch takes it:
+the container is removed and recreated, **running**, in the middle of the step that required it
+to be still.
+
+## Why it matters
+
+For the store, which is what the field was built for, the chain is: a push lands at 03:30 → the
+apply recreates the registry → the registry accepts an upload from a build running at the same
+time → `garbage-collect`, already past its mark phase, sweeps the blob that upload just wrote.
+The image is then in the store with a layer missing, and the build that made it reported success.
+
+Two things have to coincide, so it is not likely. It is also not rare enough to leave unsaid: the
+mesh pushes on every merge, at any hour, and a collection over a store this size is minutes rather
+than seconds.
+
+**The general shape is the one that matters.** `while-stopped` is the first thing in the mesh that
+makes a container's stopped state *intentional*. Everything else in the host reads "stopped" as
+"broken, fix it", which is right everywhere else and wrong here. Any future use of the field
+inherits this.
+
+## What this is not
+
+Not a regression. The store has never collected anything, so nothing is worse than it was; this
+is a hole in something new rather than something that broke.
+
+## Open questions
+
+- **Should a window take the apply lock?** The daemon already serialises applies with `applying`
+  and, across processes, with `store.Lock`. A window that held it would make the race impossible.
+  The cost is that a push arriving mid-window waits for minutes, and a push that waits is what
+  [issue 185](../185-a-refused-membership-publish-stops-the-controller/00-report.md)'s
+  family of outages looked like from outside.
+- **Or should the apply learn that a container is held?** Narrower: the scheduler says which
+  containers a window currently holds, and `applyContainer` reports those unchanged instead of
+  recreating them. Nothing blocks, and the apply tells the truth for the minutes it matters —
+  at the cost of a second source for "is this container meant to be running".
+- Either way: should the *report* say a window is open, so a machine that looks half-stopped at
+  03:31 reads as working rather than broken?
@@ -0,0 +1,97 @@
+---
+status: resolved
+opened: 2026-10-04
+located-in: [mesh-host internal/apply, mesh-controller internal/catalogue]
+fixed-by: mesh-controller#263
+amended-design:
+---
+
+# 225 — A provisioner cannot read the grant secrets since its code left the container, and every consumer of it is unserved
+
+## What was observed
+
+On the control machine, 2026-10-04, found while looking at why one app was restarting:
+
+```
+[mongodb] [provisioner:mongodb-database] mesh_novox_photos: secret not readable yet
+  (/var/lib/mongodb/grants/novox.photos.secret):
+  Error: EACCES: permission denied, open '/var/lib/mongodb/grants/novox.photos.secret'
+```
+
+**4330 times, every five seconds, since 01:30:20.** The consequence is not a log line: the
+provisioner never reads the password, so it never creates the user, so the consumer never
+connects —
+
+```
+UserNotFound: Could not find user "mesh_novox_photos" for db "admin"
+```
+
+— and the app crash-loops. Two consumers on this machine are in that state.
+
+## Why
+
+The grant secrets are what the mesh seals for each consumer and the host unseals beside the
+provider's contributions file. They are written `-rw------- root root`, which was right while a
+module's own code ran in a container as root.
+
+[ADR 0198](../../02-DECISIONS/0198-a-modules-long-running-code-is-launched-by-the-node-runtime-and-reaches-the-bus-through-it.md)
+moved a module's long-running code out of its container and under the node's runtime, which runs
+as the operator's account. The provisioner is now that account; the secret is still root's. The
+timestamps say it exactly: the files are dated 2026-09-26, the first refusal is 01:30:20 on the
+day the runtime rolled.
+
+**Nothing reports it.** The machine applies cleanly and reads as current; the provisioner says
+`secret not readable yet`, whose wording is for a real and ordinary race on the first pass — the
+host has not written the file yet — and which is indistinguishable, in the log, from a permanent
+refusal. Four thousand occurrences of a message that means "wait a moment" is the shape to
+recognise.
+
+## Why it matters beyond this instance
+
+This is every provider that provisions. The grant secret is the one file the sdk's harness reads
+for every consumer, so a provider that cannot read it serves nobody — and says so only in a line
+that reads like patience.
+
+It is also the general question the runtime move leaves: **what the mesh seals for a module is
+owned for the shape that module's code used to have.** Each module whose code moved is a module
+whose files may now be unreadable to it, and ownership is the mesh's to state, not the module's
+to work around.
+
+## What this is not
+
+Not caused by [ADR 0202](../../02-DECISIONS/0202-a-provider-declares-what-it-derives-for-each-consumer.md)
+or [ADR 0189](../../02-DECISIONS/0189-the-store-keeps-what-the-records-name.md), which landed two
+to three hours after the first refusal. Those rebuilt the two affected consumers, which recreated
+their containers and made a silent fault visible as a restarting one. The dates are above.
+
+## Open questions
+
+- Who owns a grant secret now — the module's account, as `secrets-owner` already says for a
+  module's own secrets? Then the host writes it so, and this is a one-line statement in the
+  declaration rather than a convention.
+- Should `secret not readable yet` stop saying "yet" after the first few passes? A message that
+  is right once and wrong four thousand times is a message that hides its own meaning.
+- Which other modules' files did the runtime move leave behind? The sweep is the same question
+  for every path the mesh writes for a module: directories, bundles, received files.
+
+## Resolved, 2026-10-04
+
+A grant secret is composed with the account that will read it: the node's account where the
+module's code is a bundle the runtime runs, its declared `secrets-owner` where it is still a
+container, root where it says neither. The same rule the module's own secrets already followed,
+reaching the other kind of secret the mesh writes for a module (mesh-controller#263).
+
+`givenTo` could not have reached these: it claims the files a bundle's *words* name, and the
+harness composes a grant secret's path from the contributions file, which no word names.
+
+And the harness stops calling a permanent refusal a race (mesh-sdk#22, 0.1.9). After about a
+minute it says so plainly, rarely rather than every five seconds, and names what to look at —
+who owns the file and who the process runs as. That is the half that cost three hours.
+
+**How it was checked:** on the control machine, after the push — the grant secrets belong to the
+operator's account, **zero `EACCES` since 12:30:10** where there had been 4330, both users were
+created, and `mongodb-server` logs `Authentication succeeded` for each.
+
+It also uncovered [issue 232](../232-a-consumer-authenticates-against-a-database-its-user-does-not-live-in/00-report.md),
+which this fault had been hiding: with no user anywhere, "not found in admin" was a complete
+account of *this* issue and said nothing about the consumer asking the wrong database.
@@ -0,0 +1,76 @@
+---
+status: resolved
+opened: 2026-10-04
+located-in: [mesh-controller cmd/mesh-controller/collect.go, mesh-controller internal/inventory/collection.go]
+fixed-by: mesh-controller#263
+amended-design:
+---
+
+# 226 — The store's sweep stops at the first reference recorded with an address, so it collects nothing at all
+
+## What was observed
+
+The first live run of [ADR 0189](../../02-DECISIONS/0189-the-store-keeps-what-the-records-name.md)'s
+sweep, 2026-10-04, printed on every build:
+
+```
+the artifact store kept 127.0.0.1:5100/mesh-tools/build@sha256:0de48cd3…, so nothing more was
+  asked of it: 127.0.0.1:5100/mesh-tools/build@sha256:0de48cd3… is not a reference into the
+  mesh's artifact store
+1681 more to collect; the next build asks again
+```
+
+Nothing is collected, and nothing ever will be. The store holds 1681 artifacts the mesh no longer
+keeps and the feature that exists to remove them is inert.
+
+## Why
+
+Two correct decisions meeting badly.
+
+**A reference recorded before references were kept without an address** is
+`127.0.0.1:5100/<path>@sha256:…` rather than `artifact-store://<path>@sha256:…`
+([04-ISSUES/102](../102-an-address-recorded-at-genesis-or-build-does-not-follow-the-nodes-ports/00-report.md)).
+`LetGo` rightly refuses to compose a delete for a reference whose shape it does not recognise —
+that refusal is what keeps the sweep from reaching something that is not the mesh's.
+
+**The sweep stops at the first refusal**, because "a store that refuses one refuses all of them"
+— deletion disabled, the store down, the network gone — and pushing through would mean a hundred
+identical failures in front of whoever was building something. That reasoning is right for the
+store refusing. It is wrong for *this* record being unreadable.
+
+So one old record, early in the oldest-first order, halts the whole sweep for ever.
+
+## Why it matters beyond this instance
+
+**A guard that cannot tell "I will not ask about this" from "it would not answer" stops the wrong
+amount of work.** The two deserve opposite responses: skip one, abandon the other. Collapsing
+them into "an error" is how a bounded, cautious loop becomes a loop that does nothing — and it
+reports the right number while doing it, which is what made it look healthy.
+
+## What a fix has to settle
+
+- A reference the sweep cannot address is **skipped, and the sweep goes on** — it is a fact about
+  that record, not about the store.
+- `Recorded()` already normalises the old form to the kept one, and is what the rest of the mesh
+  uses for exactly these references. The sweep should normalise before asking rather than refuse.
+- Only a refusal *by the store* ends a sweep.
+- **How it is checked:** a sweep over records holding one address-recorded reference and one kept
+  one collects the second; a sweep against a store that refuses stops at the first.
+
+## Resolved, 2026-10-04
+
+Two changes, deliberately separate.
+
+**Normalising moved to where the provenance is known.** Every reference the sweep handles came
+from a build record, so every one is the mesh's own and `Recorded` may read an address-era
+reference as the kept one. Not in `LetGo` — it cannot tell `docker.io` from the mesh's store, and
+an attempt to put it there was caught at once by the test that says a foreign reference is never
+asked about. The guard stays strict; the records speak the one vocabulary.
+
+**A reference the sweep will not address is `ErrNotOurs`:** skipped, not marked collected, never
+a reason to stop. Only the store refusing ends a sweep.
+
+**How it was checked:** the first build after the roll-out printed *"the artifact store let go of
+200 artifact(s) the mesh no longer keeps — 1126 more to collect; the next build asks again"*.
+Two hundred is the per-sweep bound working as intended; the backlog is falling with every build
+instead of standing at 1681 for ever.
@@ -0,0 +1,60 @@
+---
+status: resolved
+opened: 2026-10-04
+located-in: [mesh-catalog modules/photos]
+fixed-by: mesh-catalog#263, mesh-controller#263
+amended-design:
+---
+
+# 227 — The photo app's admin client asks for port 80, which the reverse proxy holds, so it cannot start
+
+## What was observed
+
+Applying the control machine, 2026-10-04:
+
+```
+applying "photos.admin-client": starting container photos-admin-client:
+  failed to bind host port 0.0.0.0:80/tcp: address already in use
+```
+
+Port 80 on that machine belongs to the reverse proxy (`mesh-route-proxy`, confirmed with `ss`),
+which is the whole arrangement: the proxy holds the public ports and every module is reached
+through it. A module that publishes 80 itself can never start beside it.
+
+Everything else on the machine applied; this one resource fails every pass.
+
+## How it surfaced
+
+`photos` had been pinned at a commit from 2026-09-28 and was rebuilt to `main` on 2026-10-04 —
+forced by [ADR 0202](../../02-DECISIONS/0202-a-provider-declares-what-it-derives-for-each-consumer.md)'s
+refusal of its transcribed bucket name. The admin client is one of the changes that came with the
+rest of `main`. The rebuild did not create the conflict; it delivered it.
+
+**A module pinned months behind carries whatever its branch gained, all at once, the first time
+something makes it move.** That is the cost of a pin, and it is paid in full rather than
+gradually.
+
+## What a fix has to settle
+
+- Which port the admin client should ask for, or whether it should be reached through the proxy
+  like everything else and publish nothing.
+- Whether a module declaring a port the machine's proxy already holds should be refused when it
+  is composed, rather than failing on the machine every pass. The mesh assigns ports
+  ([ADR 0038](../../02-DECISIONS/0038-the-mesh-assigns-the-port.md)); a fixed 80 beside a proxy is
+  a statement it could check.
+
+## Resolved, 2026-10-04
+
+The three photo modules publish the endpoint they declare — `4001:80`, `4012:80`, `4013:80` —
+so the software's own port reaches the machine at the port the mesh assigned, and nothing asks
+for 80.
+
+**The rule, rather than three repairs.** A container may publish only a port its module declares:
+the short form `"80"` means *publish what the software calls 80*, and the mesh fills in the
+machine's half from the port it assigned — which it can only do for a port the module declared.
+Four modules publish 80 quite safely because they declare 80. The difference is the declaration,
+not the number. A catalogue-wide test in mesh-controller#263 says so, and names all three
+offenders against the catalogue as it was.
+
+**How it was checked:** `photos-admin-client` has been up since the push, where before it failed
+on every pass.
@@ -0,0 +1,52 @@
+---
+status: located
+opened: 2026-10-04
+located-in:
+  - mesh-host
+fixed-by:
+amended-design:
+---
+
+# 228 — A login the mesh set is never given back, and undeclaring one stops the node applying
+
+## What was observed
+
+2026-10-04. Before the shell module of to-be 38 WP5 was assigned anywhere, a review traced what the
+host does with the `user` shape the module declares (the operator account, with the login shell zsh)
+on three events: first assign, a later push, and unassign.
+
+1. **Undeclaring a `user` stops the node applying anything, for good.**
+   - The host's removal has no case for a `user`, so the orphaned record fails with "no way to remove".
+   - Orphans are removed before the declaration's first resource, and that failure aborts the apply.
+   - The record stays in the host's store, so every later apply fails the same way.
+
+   This was reproduced in a throwaway test against the host's code: the apply produced no outcomes,
+   and an unrelated file in the same declaration was not written. Renaming the resource's id has the
+   same effect. A showcase module carries a `user` today and is exposed to it too.
+2. **The shell the account had is never recorded.** [ADR 0176](../../02-DECISIONS/0176-the-login-shell-is-a-node-seat-and-execute-is-its-contract.md)
+   §2 says the host "gives back [the login shell] when the holding moves". The host keeps nothing to
+   give back.
+3. **A login shell is set whether or not it exists.** A failed package install does not stop the
+   resources after it. `usermod --shell` on the distribution only warns about a missing or
+   non-executable shell, and succeeds. The host's read-back compares the user database's string,
+   which matches. So an account can be pointed at a shell that is not there, and console, ssh and
+   display-manager logins then fail. No machine hit this, because zsh was already installed on all
+   four.
+
+## Why it matters beyond this instance
+
+Unassigning any module with a login in it, the case the mesh promises is ordinary, wedges the
+machine's applies until a person edits the host's store. It is the same class of failure as an
+earlier archive that could not be removed: a shape the host can create and cannot take away.
+
+## Located
+
+mesh-host, `internal/apply`: `remove()` has no `user` case, and `applyUser` neither records the shell
+it replaced nor checks the shell it sets. The fix is set out in
+[to-be 41](../../03-DESIGN/01-to-be/41-the-shell-and-the-accounts-environment.md) WP1:
+
+- a removal that never deletes an account;
+- the login shell given back, if it is still the one the mesh set and the recorded one still exists;
+- a shell refused before it is set unless it is executable and listed among the machine's shells
+  (a shell that refuses logins need only be executable, since the distribution does not list it and
+  the controller's own account uses one).
@@ -0,0 +1,61 @@
+---
+status: open
+opened: 2026-10-04
+located-in: []
+fixed-by:
+amended-design:
+---
+
+# 229 — A rollout cannot be followed through the mesh's tools, so an agent goes round them
+
+## What was observed
+
+2026-10-04, rolling out to-be 41. An agent drove the rollout through the mesh's MCP tools: the
+controller seat's `status`, `plans`, `command`, and the forge's merge. Four times it left those tools
+and posted JSON-RPC by hand to the node console's HTTP endpoint with `curl`:
+
+1. **To wait for a plan.** `plans` answers once, with prose. Nothing waits for a plan to reach a tier,
+   finish or fail. An agent's tools cannot be called from a shell loop, so the only way to be told
+   when a plan moved was a background `curl` loop polling the console every twenty seconds and
+   matching the plan's line with `grep`.
+2. **To read `status`.** `status` answers a paragraph of prose (the bus's user list), then a JSON
+   document, both inside one string. Picking out `behind`, `waiting` and `reported` took a script
+   that cut the string at the first brace and parsed the rest.
+3. **To read one module out of `module list`,** whose output was too long to read whole for one line.
+4. **To call a tool that arrived after the agent's session began.** The modules rolled out in that same
+   session added `node-login-shell.execute` and `zsh.zsh_config` to one machine. The agent's MCP
+   connection had been opened before the console moved to discovery ([ADR 0195](../../02-DECISIONS/0195-the-meshs-tools-are-found-by-address-not-announced-whole.md)).
+   It still held the flat catalogue the console announced then, which lacks both the new verbs and the five discovery tools (`mesh_call` among
+   them) the console announces now. Clearing a session does not reconnect its MCP servers, and the
+   console never sends a list-changed notice, so nothing told the client its list was stale. The agent
+   posted `mesh_machine` and `mesh_call` by hand. Reconnecting the server would have given it the
+   discovery tools, which reach any tool by address the moment it exists.
+
+The calls were authorised, because the console is the operator's own surface. But each is a raw call
+the mesh's tools were meant to make unnecessary ([ADR 0154](../../02-DECISIONS/0154-the-meshs-own-verbs-are-the-controller-seats-tools.md)
+puts the controller's verbs behind the seat). Each is also a script that breaks silently when a
+sentence in the prose changes.
+
+## Why it matters beyond this instance
+
+Every rollout an agent drives has the same shape: merge, wait for a plan, push, wait for reports,
+check `status`. When the tools answer only once and only in prose, every agent writes its own poller
+and its own parser. Those are invisible to review, different each time, and wrong the first time the
+wording moves. An agent that cannot wait also tends to act early, which is the opposite of what a
+rollout needs.
+
+## What a fix has to settle
+
+- A way to **wait** on the mesh's own progress. For example, `plans` and `status` could take a plan
+  or node and a bound, and answer when it moves or the bound passes. Or a verb could follow one plan
+  to its end.
+- **Structured answers** from the controller's verbs, with the prose as a field beside the data, not
+  around it.
+- Whether `command`'s generic answer should take a filter, or whether the verbs it is used for most
+  (`module list`, `node show`) deserve verbs of their own.
+- **A client is told when the console's own surface changes.** The console announces `listChanged`
+  and sends the notice when what it lists changes, for example after an upgrade that changes its
+  tools. A long-running session then never keeps a list the console no longer serves. Discovery
+  already makes every module's tools reachable without the list changing.
+
+How each is checked belongs to the record that settles it.
@@ -0,0 +1,87 @@
+---
+status: open
+opened: 2026-10-04
+located-in:
+  - mesh-host
+  - mesh-controller
+fixed-by:
+amended-design:
+---
+
+# 230 — A host that hands over to a newer one loses its report, and a plan waits for it for ever without saying so
+
+## What was observed
+
+2026-10-04, rolling out to-be 41. A new host build and a new controller were merged together. The
+controller's plan built build-agent and sent every machine a fresh declaration, which also delivered
+the new host. Three of the four machines logged, within the same second:
+
+```
+host 4bd7df099757 is delivered; standing aside so the launcher runs it
+applied 546 resource(s)
+applied, and could not tell the mesh: reporting: context canceled
+nox-mesh-host-launch: running /usr/lib/nox-mesh-host/versions/4bd7df099757/nox-mesh-host
+```
+
+The new host came up and waited for its next declaration. The mesh never heard that the old one had
+applied.
+
+The plan then sat at "tier 1 built; waiting for build-agent on [three machines] to be applied", and
+everything the mesh said about it read as healthy:
+
+- `status` showed it as `rolling` with `"late": false`;
+- `plans` printed "for 0s" on every look, so the wait never appeared to grow;
+- the three machines' reports showed `current: false`, which reads like a machine that is merely slow.
+
+Nothing logged, alerted or counted the wait. It was found because a person asked twice for the plan's
+state, and the cause was found by reading a machine's own journal. A push to each of the three machines
+released it: each new host applied and reported, and the plan moved on.
+
+The same day, a second way to lose a report showed up. Assigning modules with tools to a workstation
+changed the bus's user list, which the control machine's declaration carries. Applying it replaced the
+bus's container, which cut every machine off for about fifteen seconds. The control machine itself
+then logged `applied, and could not tell the mesh: reporting: nats: connection closed`. The report was
+lost because the bus restarted under the apply that restarted it.
+
+## Why it matters beyond this instance
+
+**Every genuine host upgrade loses one report.**
+[Issue 163](../163-a-delivered-host-stood-aside-on-every-push-and-reported-nothing/00-report.md) fixed
+the host that stood aside on every push for the version it already ran. It named the mechanism, that
+standing aside cancels the context the report is published with. That fix made standing aside
+happen only for a real new version, but left the mechanism in place. So whenever a host build reaches
+a machine, that apply's report is lost.
+
+**And the mesh cannot tell a stuck wait from a slow one.** A plan that waits on a report that will
+never come waits for ever, and nothing about it changes:
+
+- its age does not grow ("for 0s");
+- `late` stays false;
+- nothing logs, emits an event or alerts.
+
+This is [issue 187](../187-the-mesh-tells-nobody-when-it-stops-working/00-report.md)'s class of fault
+again, *the mesh tells nobody when it stops working*, now in the rollout machinery that every merge
+goes through. The operator's rule from issue 163 applies: if an answer has not come in the time an
+answer takes, something is wrong, and the mesh must say so itself.
+
+## What a fix has to settle
+
+1. **A report survives whatever its own apply restarts.** The host publishes its report and has it
+   acknowledged before it stands aside. It retries a report the bus dropped once the link is back.
+   Failing that, the new host should report the declaration it took over,
+   naming the apply its predecessor finished. A lost report must be impossible, not merely unlikely.
+2. **A plan's wait has an age and a bound.**
+   - "for 0s" must be the real time since the wait began.
+   - A wait past a bound, set by how long an apply takes rather than by a guess, makes the plan
+     `late`.
+3. **Late is said where people and agents look.**
+   - It is said in `status` and in `plans`.
+   - It is logged as a warning by the controller.
+   - It is emitted as an event under the controller seat, so something can alert on it.
+4. **A plan waiting on a machine the mesh has stopped hearing from** says that, by name, instead of
+   waiting. The machine's heartbeat already tells the controller it is alive. A live machine with an
+   unacknowledged declaration is the stuck case itself.
+
+How each is checked belongs to the fix. For the host: a delivered upgrade, applied, is reported. For
+the controller: a plan whose machine never reports turns `late` within its bound, and says so in
+`status`, the log and an event.
@@ -0,0 +1,41 @@
+---
+status: open
+opened: 2026-10-04
+located-in:
+  - mesh-controller
+fixed-by:
+amended-design:
+---
+
+# 231 — A misspelled placeholder is written out as text
+
+## What was observed
+
+2026-10-04, while studying the predecessor's failures. A manifest was checked whose one file holds four
+placeholders: `${shel:zsh:first}` (a misspelled namespace), `${setting:Undeclared}` (a setting the module
+does not declare), `${machnie:address}` (a misspelled namespace) and `${XDG_CACHE_HOME:-x}` (shell
+syntax, which must pass through). The catalogue check, which runs the same functions registration does,
+answered `ok`.
+
+The controller fills each namespace it knows with its own pattern (`machine`, `setting`, `bound`, `dir`,
+`port`, `secret`, `environment`, `shell`, …). A word in that shape that no pass consumes is left in the
+file as it was written. A misspelling therefore reaches a machine as literal text, in a configuration
+file that then reads it as a value.
+
+## Why it matters beyond this instance
+
+This is exactly the predecessor's failure: an unresolved template variable in a destination path
+installed green, and a literal `${...}` path stood under `/etc/ssl` until somebody looked. The mesh's
+namespaced placeholders were meant to end it ([ADR 0164](../../02-DECISIONS/0164-a-setting-is-declared-with-its-default-its-meaning-and-what-changing-it-costs.md)),
+and they do for every name spelled right.
+
+## What a fix has to settle
+
+After every pass, a final sweep refuses any remaining `${<word>:` whose word is a lower-case
+namespace-shaped token, naming the module, the field and the token, at the catalogue check and at
+composition. Shell syntax (`${NAME:-…}`, `${(%):-…}`, `${1:-.}`) is not namespace-shaped and passes. So
+does contributed shell code, which no pass reads (ADR 0204). A setting a module uses but does not
+declare is refused the same way.
+
+How it is checked: the controller's test with the four placeholders above, three refused by name and
+one passed through.
@@ -0,0 +1,60 @@
+---
+status: resolved
+opened: 2026-10-04
+located-in: [mesh-catalog modules/photos]
+fixed-by: mesh-catalog#264
+amended-design:
+---
+
+# 232 — A consumer authenticates against a database its user does not live in, and one fault hid it behind another
+
+## What was observed
+
+Fixing [issue 225](../225-a-provisioner-cannot-read-the-grant-secrets-since-its-code-left-the-container/00-report.md)
+on the control machine, 2026-10-04. With the grant secrets readable again the provisioner created
+both consumers' users at once, and one consumer still could not connect:
+
+```
+Authentication succeeded | user: mesh_novox_invoice | authDb: mesh_novox_invoice
+Authentication succeeded | user: mesh_novox_photos  | authDb: mesh_novox_photos
+Authentication failed    | user: mesh_novox_photos  | authDb: admin
+                           UserNotFound: Could not find user "mesh_novox_photos" for db "admin"
+```
+
+The provider creates each consumer's user **in that consumer's own database**, which is what the
+first two lines are. `photos` asks for `admin`. Its sibling `invoicing`, against the same
+provider, asks for `${bound:mongodb-database:as}` — the name the mesh gave it — and works.
+
+The password was never the problem: the grant secret and the value in the consumer's environment
+hash identically.
+
+## Why it matters beyond this instance
+
+**One fault wore the other's clothes.** While the provisioner could not read its secrets at all,
+*no* user existed, so `UserNotFound ... for db "admin"` was a true and complete account of issue
+225. Fixing 225 is what made the wrong database visible — before that, every symptom pointed at
+the thing that was already broken, and a second fault behind it was indistinguishable.
+
+That is the general shape worth keeping: **a fault that explains the symptom is not evidence
+there is only one.** The check is to fix the first and look again, rather than to close both on
+one explanation.
+
+It also says something about the interface. Which database a consumer authenticates against is
+part of what `mongodb-database` means, and it is spelled out by hand in each consumer. Two
+consumers of one provider wrote two different answers, and only one was right; nothing compared
+them. That is the shape [issue 124](../124-a-consumer-cannot-be-told-what-its-provider-derived/00-report.md)
+records for a derived bucket, here for the authentication database —
+[ADR 0202](../../02-DECISIONS/0202-a-provider-declares-what-it-derives-for-each-consumer.md)'s
+mechanism is what would remove it, by letting the provider say it once.
+
+## Resolved
+
+`photos` asks for `${bound:mongodb-database:as}`, as `invoicing` already did (mesh-catalog#264).
+**How it is checked:** the module is rebuilt and pushed, and `photos-server` connects — verified
+on the control machine rather than inferred from the manifest.
+
+## What this leaves open
+
+Nothing compares two consumers' idea of one interface. The provider could serve the
+authentication database as a derived value under ADR 0202 and neither consumer would state it;
+that is a candidate for the next consumer of this interface, not a repair of this one.
Author	SHA1	Message	Date
jschoubben	ab1bd5598e	Issues 225, 226, 227 resolved with their live proofs; 232 opened and resolved 225: a grant secret is composed with the account that reads it — the node's account for a bundle, the declared secrets-owner for a container. Zero EACCES since 12:30:10 where there had been 4330, both users created, mongodb logging Authentication succeeded for each. The harness also stops calling a permanent refusal a race, which is the half that cost three hours. 226: normalising moved to the records, where the provenance is known, and a reference the sweep will not address is skipped rather than ending the sweep. The first build after the roll-out collected 200 and said 1126 remain — the backlog falls with every build instead of standing at 1681 for ever. 227: the three photo modules publish the endpoint they declare, and a catalogue-wide test makes it a rule: a container publishes only a port its module declares, or the mesh has nothing to assign and the number escapes. 232 came out from under 225: photos asked for a database its user does not live in, invisible while no user existed at all.	2026-10-04 12:37:31 +02:00
jschoubben	3f3fb99219	Issue 232: a consumer authenticates against a database its user does not live in Found fixing 225: with the secrets readable the provisioner created both users at once, and photos still could not connect because it asks for admin while its user lives in its own database. The password was never wrong — the grant secret and the consumer's environment hash identically. One fault wore the other's clothes: while no user existed anywhere, the error was a complete account of 225. Worth keeping as a habit — fix the first and look again.	2026-10-04 12:33:57 +02:00
mesh-admin	3afe619531	Merge pull request 'ADR 0208: the graphical session is one module per piece, on the mesh's seats' (#356 ) from decision/0208-the-graphical-session-is-modules-on-seats into main	2026-10-04 10:29:20 +00:00
jochen	502cf4839b	ADR 0208: the graphical session is one module per piece, on the mesh's seats Eleven node seats; a display as a provision with the machine's reach; other modules' lines through the tool's own drop-in directory or ADR 0204's slots, now also for xinitrc and xresources; the display server's module writes the session's start.	2026-10-04 12:29:13 +02:00
mesh-admin	0ba68c154e	Merge pull request 'Issue 162 resolved: an archive can be undeclared (mesh-host#90)' (#355 ) from issues/162-resolved into main	2026-10-04 10:25:44 +00:00
jochen	460793af1c	Issue 162 resolved: an archive can be undeclared (mesh-host#90)	2026-10-04 12:23:06 +02:00
mesh-admin	25de331e9b	Merge pull request 'ADR 0207: a module depends on the node seats that apply its resources' (#354 ) from decision/0207-a-module-depends-on-the-seats-that-apply-its-resources into main	2026-10-04 10:21:46 +00:00
jochen	ed5ddcdef6	ADR 0207 extends ADR 0177 (accepted); 0166 stays a reference	2026-10-04 12:21:40 +02:00
jochen	e4f80cc3ce	ADR 0207: a module depends on the node seats that apply its resources A service needs node-service-manager held on its node, a package node-package-manager, a container node-container-runtime: derived from the resources, never stated; refused at assign, reported at composition until the three holders are on every node. Glossary: depends on a seat; nothing claims a package.	2026-10-04 12:21:24 +02:00
mesh-admin	d2689c0f86	Merge pull request 'Issues 229 and 230: a rollout cannot be followed through the mesh's tools; a host hand-over loses its report and a plan waits for ever' (#352 ) from issues/229-a-rollout-cannot-be-followed-through-the-meshs-tools into main	2026-10-04 10:09:34 +00:00
mesh-admin	719aa6bd62	Merge pull request 'Research 026 and 027, issue 231, to-be 42: the graphical session, the system layer, and the order they are built in' (#353 ) from research/026-027-the-graphical-session-and-the-system-layer into main	2026-10-04 10:08:33 +00:00
jochen	ca13f59c88	To-be 42: the machines' modules, in order — every machine's, then the workstations', then one model's	2026-10-04 12:08:26 +02:00
jochen	f8a0402485	Merge remote-tracking branch 'origin/main' into research/026-027-the-graphical-session-and-the-system-layer	2026-10-04 12:08:17 +02:00
jochen	9016d88d54	Research 026/027: improve while adopting, the fonts chosen, and a catalogue of the tools each module serves	2026-10-04 12:06:08 +02:00
jochen	6e5dfd2ab8	Research 027/03: the laptop's power management; 026/04: fonts	2026-10-04 12:03:29 +02:00
mesh-admin	872f20d51f	Merge pull request 'To-be 40: building the operator's agent and its licence manager as work packages' (#297 ) from feat/claude-code-work-packages into main	2026-10-04 10:01:15 +00:00
jochen	550453c5db	Research 026/04: the clipboard	2026-10-04 12:00:20 +02:00
jochen	b7aebedc2d	Research 026/04: the screensaver, monitor layouts and menus	2026-10-04 12:00:01 +02:00
jochen	27b2d30441	Research 027/03: ~/.ssh as one module's, scripts on every machine, the keyring, mail as events	2026-10-04 11:59:23 +02:00
jochen	82fa5f79ea	ADR 0206: a node reports the grant it holds; the manager adopts a licence by refreshing it The operator's flow: clients publish what their credentials file holds, the manager takes in a licence it does not own and rotates it from then on. The token itself cannot be published (design 32 §10, ADR 0201), so a node reports fingerprints and identity as state and hands the grant over only when the manager asks; adopting is refreshing, newest login first; bindings with a generation replace the rotated/switched events. Designs 36 and 39 and to-be 40 amended; a pointer note on ADR 0183.	2026-10-04 11:58:46 +02:00
jochen	f6668d76d6	There is no home-scoped module: ADR 0181 and 0182 say so as progressive insights; design 36 and to-be 40: the module declares the two directories it owns ADR 0173 §2: a module is what it declares, and there are no kinds of module. The two records called a resource under a home and a module placing one home-scoped; the wording is corrected in place, marked and dated, the decisions unchanged. Design 36 and to-be 40 now say the module declares /etc/claude-code and ~/.claude as directories, so the ownership check sees both, and declares no file under either (mesh-catalog #244).	2026-10-04 11:56:32 +02:00
jochen	f5d54db7aa	Plan and designs after ADR 0193, 0195 and 0198: bundles are launched and the runtime is their bus; the manager's daemon is a long-running bundle; the console's five tools The dated note on ADR 0183 now rests on ADR 0193 and 0198 rather than on a bundle having no way to call: the manager starts every exchange by the operator's direction, through mesh/ask. To-be 40's WP4 no longer waits on a record — ADR 0198 is it — and the live proofs count the console's five tools (ADR 0195).	2026-10-04 11:56:32 +02:00
jochen	bcf010886d	Design 36 §4: the console is registered in the exclusive managed tool-server file, because the managed-settings key refuses a non-https URL	2026-10-04 11:56:32 +02:00
jochen	2eba399e1e	To-be 40 revised for the tools refactor; the manager starts every exchange (ADR 0183 dated note, designs 36 and 39) Design 38's WP1-WP4b ran: the node's tool runtime is live on all four machines as the operator account, tools are bundles given only their declared words, and a bundle has no bus credential. So the wait on design 38 WP3 is over, the agent module calls nothing and the manager starts every exchange (key, hand-over, waiting login, reconcile), and the manager's daemon now waits on WP4c's record instead. Accounts are stated on all four, sudo -n works for each, the agent is installed on all four; the plan's WP0 shrinks and WP2 gets a configuration-only live proof before any licence.	2026-10-04 11:56:32 +02:00
jochen	d227ed12d2	To-be 40: building the operator's agent and its licence manager as work packages Designs 36 and 39 say what is built; this says in which order and what proves each step, in the shape to-be 38 gave the operator's machine. Seven packages: the operator states the facts (accounts, roles, licences); the console provides its endpoint; the licence manager and the agent module are built and unit-tested in parallel; the manager goes live on the control node; the agent on one workstation, with the switch and the predecessor's files removed as the proof of the whole; then the rest of the nodes and the retirement of the two catalogue modules built on the old placement. The live proofs wait for to-be 38's WP3, because both modules' tools run in the node's tool runtime (ADR 0175) and a per-module tool container would rebuild what that record retires.	2026-10-04 11:56:32 +02:00
jochen	8712d666bf	Research 026/03: what the predecessor taught; issue 231: a misspelled placeholder is written out as text	2026-10-04 11:49:19 +02:00
jochen	61e70b9395	Research 027: the operator's choices, the hosts file, mounts, and two DHCP clients on one interface	2026-10-04 11:21:35 +02:00
jochen	de032e704c	Research 026 (the graphical session) and 027 (the system layer) Evidence from both workstations and all four machines, read-only, and the questions each must answer: seats and gating for the display stack, who starts the session with which environment, contributions beyond shells, sway as a sibling session; the container runtime with docker-compose on workstations only, software outside the official repositories, secrets in the account's environment, and three security findings.	2026-10-04 11:17:34 +02:00
jochen	0c2eae07c5	Issue 229: the stale tool list is a connection opened before discovery; the fix is list-changed	2026-10-04 11:01:50 +02:00
jochen	f23a71e0d7	Issue 230: a report is also lost when the apply restarts the bus	2026-10-04 11:00:27 +02:00
jochen	9c13c89fa3	Issue 229: new tools never reach an agent's connection, and the console's generic tools are not on it	2026-10-04 11:00:13 +02:00
jochen	2db0ea268d	Issue 230: a host that hands over loses its report, and a plan waits for it for ever without saying so	2026-10-04 10:54:35 +02:00
jochen	8d83d94659	Issue 229: a rollout cannot be followed through the mesh's tools	2026-10-04 10:51:45 +02:00
mesh-admin	a8ffc2b94b	Merge pull request 'Research 025 graduated: ADRs 0203–0205, issue 228, to-be 41 (the shell and the account's environment)' (#351 ) from feat/the-shell-and-its-environment into main	2026-10-04 08:49:36 +00:00
jochen	1dcbdae1c4	Issue 225 → 228: the number was taken on main while this branch was open	2026-10-04 10:30:46 +02:00
jochen	c3ec48f85c	To-be 41 WP1: directories made inside a home belong to its account	2026-10-04 10:30:23 +02:00
jochen	72eda923c7	ADR 0205: the vendored theme's measured size	2026-10-04 10:30:23 +02:00
jochen	c4fedcdbe3	To-be 41 WP1: a shell that refuses logins need not be listed; giving back is never fatal	2026-10-04 10:30:23 +02:00
jochen	0bf70ee8b4	Graduate research 025: the environment and the shell's contributions ADR 0203: the account's environment is one module's (seat node-environment); every module contributes variables and PATH entries, rendered by the controller as a POSIX file and as environment.d. ADR 0204: shell code is contributed to the login shell in named slots, and login-shell becomes the mesh's node-login-shell. ADR 0205: software the distribution does not package ships as a pinned archive of the module. Issue 225: undeclaring a user stops a node applying; the shell is never given back or checked. To-be 41 carries the work packages; to-be 38 WP5 points to it.	2026-10-04 10:30:23 +02:00
jochen	947b85af5e	Research 025: an environment module holds the account's environment The operator's proposal: one module, holding a mesh seat node-environment, is the only writer of the account's environment. It renders contributed variables and PATH entries as a POSIX file shells source and as environment.d for the graphical session. The shell's contribution shrinks to shell code; the shell render-then-service-manager-again positions become options weighed against it.	2026-10-04 10:30:18 +02:00
jochen	ac6c306df3	Research 025: how a module plugs into the operator's shell Opened after the zsh module's rollout (to-be 38 WP5) was stopped: every machine carries the same predecessor-written startup file, the module's block would duplicate it and drop lines, nothing installs the prompt, and execute never reads .zshrc. Weighs how modules contribute environment and shell code, where the operator's own lines go, ordering, and what a contribution is addressed to.	2026-10-04 10:30:18 +02:00
mesh-admin	96df3ccc88	Merge pull request 'ADR 0201 → 0202, and three issues from the night group 8 shipped' (#350 ) from issues/the-night-of-group-8 into main	2026-10-04 02:34:32 +00:00
jschoubben	bc64c5c187	ADR 0201 → 0202, and three issues from the night it shipped The derived-value record is renumbered a second time: the key-value-buckets record took 0201 while this waited to merge, as the bundles record took 0188 before it. Both times free when chosen, taken by the time it landed. cycle.py caught it; three repositories cite this record, so the number matters. 225 — a provisioner has not been able to read its grant secrets since 01:30, when a module's own code left its container and the files stayed root's. Four thousand refusals, each worded as patience, and two consumers unserved. Not from ADR 0202 or 0189, which landed hours later; dates in the report. 226 — the store's sweep stops at the first reference recorded with an address and collects nothing. A guard that cannot tell 'I will not ask about this' from 'it would not answer' stops the wrong amount of work. 227 — the photo app's admin client asks for the port the proxy holds. A module pinned months behind carries everything its branch gained, the first time anything makes it move.	2026-10-04 04:33:45 +02:00
mesh-admin	be4b5777b8	Merge pull request 'Research 024 and ADR 0201: a module keeps its current state in key-value buckets' (#348 ) from feat/module-state-on-the-bus into main	2026-10-04 01:43:34 +00:00
mesh-admin	d882b3568c	Merge pull request 'Group 8: ADR 0201 (a provider declares what it derives, issue 124) and ADR 0189 (the store keeps what the records name, issue 108); issue 202' (#305 ) from feat/the-store-keeps-what-the-records-name into main	2026-10-04 01:30:47 +00:00
jschoubben	a3523617d3	Review before merge: the multi-holder boundary, the window's open race, the sweep's bounds ADR 0201 gains the boundary found reading it back: a consumer keeping several holders of a deriving provider is refused, because the two ends have no way to agree. ADR 0189 gains two consequences — the sweep is bounded because it runs inside a build, and an apply arriving mid-window reopens it. That last one is issue 224, recorded rather than fixed: the host's rule for a stopped container is to replace it, and while-stopped is the first thing that makes a stopped container intentional. Both candidate fixes are decisions with their own cost. Nothing is worse than it was; the store has never collected.	2026-10-04 03:27:32 +02:00
jochen	6b4da63261	Research 024: the composed grants, checked against a server once built	2026-10-04 02:50:02 +02:00
jochen	e1b0bbde91	Research 024 and ADR 0201: a module keeps its current state in key-value buckets Events miss a machine that joins after them and replay history where only the latest matters. A module now declares state it owns and reads; the controller creates the buckets, the runtime serves them on the bundle's channel. Designs 32 and 25 amended; grants measured against a running server.	2026-10-04 02:36:59 +02:00