It asks what it missed on every start and the answer never arrived: the control plane replayed each
build it held as a module's event from a module called "control-plane", which does not exist, so its
own account refused the publish and the graph kept the gap. The control plane now states those under
the seat it holds (novox/hq ADR 0134, mesh-controller #129), so this consumes that too — one handler,
because what a build means for the graph is the same whether the build machine says it as it happens
or the mesh says what it already held.
It brought its schema up inside its runtime, on every start. That made a schema it could not reach a
crash loop rather than a stop, with the module graph keeping a gap and nothing saying so — which is
how a whole morning's builds went unrecorded. The mesh now prepares this module's state before it
starts this version and does not start it if that failed (novox/hq ADR 0135): the work moves to an
entrypoint the image names in MESH_PREPARE, beside the entrypoints it already names.
The reason it was at start — that a step blocking the apply would block the very apply bringing the
overlay up — stopped being true when a step's failure became its module's business rather than the
machine's (ADR 0136).
Its runtime announces that it has just started and may have missed builds — the event the control
plane follows to replay them — and its manifest did not declare it. A module's authority on the bus
is derived from what it declares, so the publish was refused and the runtime died on start, in a
loop, with the mesh's graph never catching up.
ADR 0121. The builder declared `built` as its own event, so every consumer depended
on which module happens to be the build machine today. It is the build-machine
role's event now: the builder declares none of its own, and the catalogue listens
for `mesh-build-machine.built` rather than `builder.built`.
Nothing changes about what reaches the catalogue. What changes is that it survives
the build machine being a different module, which is the whole reason the mesh has a
word for a role.
Every module named its events the way the old bus spelled a routing key —
`module.<module>.<verb>`. Design 29 says a module names an event locally and the
mesh works out where it lands, so all 37 were stale against a rule already
decided. On the new bus that derives into a namespace belonging to a module
called "module", so no cross-module subscription in the mesh matched anything:
nothing failed, nothing reacted (novox/hq 04-ISSUES/127).
36 manifests converted, and 43 files of module code with them. The code mattered
as much as the manifests: the runtime builds the subject from what `emit()` is
handed, so a converted manifest with unconverted code would have had the
permission and the subject disagree.
Three things the new check found on the way:
- `photos` emitted an event its manifest never declared, which the new bus refuses
outright. Declared.
- `showcase` waited for an event nothing emits, so its demo could never be
triggered — only `showcase` may publish under its own name. It emits both halves
now.
- `distribution` declared an event named after a different module. It emits
`image.pushed` under its own name. An event about a *role* belongs on the seat,
where the name outlives whoever holds it, but the sdk has no way to publish on a
seat yet, so that stays recorded rather than declared.
The audit logger's "everything" pattern is `**` rather than the old bus's `#`.
Ten manifests claim mesh-* names now. What they PROVIDE is unchanged: gitea
still provides git and npm-package-registry, and a consumer requires the
interface, not the seat.
From the survey of every env-file secret (ADR 0086, issue 041): amqp-ping,
minio, mongodb and grafana use the _FILE twin their software honours;
mesh-catalog and model-usage read DATABASE_URL_FILE (a file the mesh
templates, mounted where only the runtime reads it); grafana's secret files
belong to its own account. Two dead deliveries removed: a line nothing read
in amqp-email-forwarder, and mailu's secret.env on four containers that
never read it. The 25 exceptions that remain carry the surveyed reason —
convertible and awaiting a bed, convertible through a generated config file,
the application's own code, or not convertible.
ADR 0086. mesh-controller mounts its six own secrets and names them with
_FILE twins, so no credential of its own reaches its environment. The 35
containers that still read a secret through an env-file carry
secrets-in-environment with the reason; converting each where its software
accepts a path is the per-module work of issue 041.
A replayed build is registered exactly as any other and announced to nobody. A
module that moved months ago is not something anything should act on now:
emitting `upgraded` would have the control plane decide about a rollout, and
`rebuild-needed` would ask for builds of things already current.
Asked on every start rather than only the first, because a catalogue cannot tell
whether it has a gap — and the answer is idempotent, so asking when there is none
costs a message. Asked after subscribing, so a build arriving during the replay
is not lost between the two.
Closes novox/hq 04-ISSUES/050 with mesh-control.
Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx
Each named a digest produced inside a lab that no longer exists, so none of them
could be built anywhere else. They say which module they stand on now, and there
is deliberately no default — a build nobody told stops at the declaration rather
than at a reference that resolves to nothing.
A comment changed in a build recipe is a new commit and a byte-identical image.
Comparing commits called every module standing on it stale, so the mesh would
have rebuilt itself entirely to arrive back exactly where it started — and
listed each dependent once per commit that had produced the same image.
The base was a digest typed in by hand, for an image nothing in the mesh could
produce — so the graph held edges pointing at it with no version on the far end,
and the one change that reaches every module at once could never be noticed.
It is a module now, and these edges resolve.
Build edges are discovered by building; requires and provides are stated by the
module about itself. Both belong in the graph and answer different questions —
and "what provides postgres-database" needed a sweep over every manifest, which
only something holding all of them can do.
The catalogue expected each edge to name a module and a commit. The builder
sends a pinned image reference — it cannot know which module produced it, that
is a fact about the graph. So every build that had been built on top of anything
was rejected, and only the modules built against nothing ever registered.
Versions now record what they published, and an edge resolves through that. An
edge to an artifact no module here produced is kept: it resolves by itself when
that module is registered, which is the ordinary case while a mesh fills in.
`run` imports an entrypoint without binding a broker — it exists for a step that
works offline and exits. Both the catalogue and amqp-ping subscribe on import,
so both died on the first on() with no broker bound.
The runtime base carries what every module needs, and a database driver is not
that. Installed into an empty directory because the module's package.json also
names the sdk, which lives in the base rather than on a registry.
It links module-versions to each other and knows nothing about nodes; which
machine runs what stays the control plane's (novox/hq ADR 0070, 0072). Keeping
them apart is what lets the control plane carry on composing declarations while
this is down.
The builder announces what it built, this places it in the graph and announces
what that means, and the control plane hooks the meaning rather than the build
output. A rebuild producing the commit already current is registered and is not
an upgrade — announcing it would ripple outward forever through modules that did
not change.
Ordering is not computed. Modules stale and waiting on nothing that is itself
stale are announced as buildable; the rest stay stale and appear once whatever
they were waiting for is registered, so a chain and a diamond need no special
handling and nothing holds a plan.
Four tools over the graph: what this mesh holds, one module in full, what a
change to a module reaches, and what must be rebuilt and why. The edges are
derived from builds rather than declared, so they cannot drift from what the code
actually uses.
Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx
jschoubben