**0024 accepted.** Model access was decided, built, and proven in the lab, and two design documents rest on it; only the status had never moved. The gate is green again. **The work breakdown rewritten.** It planned a decomposition of the existing system in place — extract contexts, declared features, shrink the shared library. That is not the work. A replacement is being built beside it, and only the old Phase 0 survived contact with reality, so the one document meant to say what happens next was describing a system being retired. Now ordered by what "modules move across one at a time until the old registry is off" actually requires: - Phase 0 is marked done against the twenty-two lab assertions, **and carries its own limitation**: every module exercised was written to test the mechanism, so the vocabulary was shaped by its own fixtures. - Phase 1 is the vocabulary gaps found by asking what real modules need — an object-store provision, a session as a licence consumer, a network shape with ordering, public certificate issuance. - Phase 2 is one module, then a week of running it, because the point of going first is to find what Phase 1 missed. - Phase 3 picks modules that each prove something the first did not; the mail system is last because it is the one that may send work back into the declaration language. - Phase 4 is switching the registry off, named as a phase so it is not mistaken for the goal. Keeps the rules of engagement unchanged — they were about how work is done, not what it is — with one addition: stop and ask before anything that touches a machine outside the lab. Adds a section on keeping the list true, since the document it replaces was wrong for weeks and nothing said so. A claim here is counted, not reasoned, and a phase is done when the lab says so.
6.6 KiB
02-DECISIONS
Architecture decision records — the "why" trail behind the rules in
00-META and the specifications in 03-DESIGN.
Numbered 02 because a decision precedes the design it authorises. Research concludes,
the decision is recorded here, and only then is the design written. Following the folder
numbers walks the process in the order it happens.
One file per decision, numbered, never deleted. A superseded record has its status: changed
and gains a pointer to what replaced it — its text is never edited. The reasoning that was
rejected is the expensive half to rediscover.
The records run in the order the decisions were taken, oldest first.
Every decision is a record. There is no ledger and no index file — if a decision is worth
recording it is worth a record, and if it is not worth a record it is not recorded
(ADR 0019). A "decision" small enough to be one line is
almost always a rule, and a rule belongs in
00-META/how-we-build.md, where it is enforced and keeps the
incident that earned it.
Frontmatter
---
status: proposed | accepted | superseded
date: YYYY-MM-DD # when the decision was taken, not when it was written down
deciders: name
reconstructed: true|false # true when the record was written after the fact from evidence
superseded-by: # 02-DECISIONS/NNNN-....md, when status is superseded
extends: # 02-DECISIONS/NNNN-....md, when this record widens an earlier one
---
Body
# N. Title in plain language
## Context what was true, with evidence
## Considered Options numbered, each with why it was rejected
## Decision what was decided
## Consequences what follows, including what got harder
## References commits, pull requests, knowledge-base entries, prior art
State evidence, not assertion. "Zero of 124 modules declare brain as a dependency"
outranks "the dependency rule is not followed".
Reconstructed records
Records 0001–0014 were written on 2026-08-23, after the decisions they describe. Records 0015 onward were taken as records. Those
decisions were taken in implementation rather than in a document; the records state what was
decided and the evidence it was decided from, and each carries reconstructed: true and says
so in its first lines.
A reconstructed record is not a transcript. Where the deliberation is not recoverable, the options section states what the alternatives were and why the chosen one won on the evidence available — not a discussion that did not happen. Where a date is not establishable it says so rather than guessing.
Index
A number identifies a record and never changes. Records are referenced from outside this repository — code comments, commit messages — so a number that moves invalidates them silently. Renumbering once cost 96 references across two code repositories, and that is why the numbers are now fixed.
So the folder is in creation order, and the reading order lives here. It is generated from
each record's topic: and written, because a reader looking at the folder on a forge sees the
folder rather than a command. The objection to a written index is that it drifts — which is
answered by checking it rather than by refusing to write one:
python3 00-META/checks/index.py --write regenerate
python3 00-META/checks/index.py fail if stale
What the mesh is
- 0001 — The mesh brokers capabilities; nodes host; agents think
- 0002 — Nodes communicate over a message broker, not over HTTP
- 0003 — An agent is a persistent employee, not an instance of a pool
Its tiers, from the bottom up
- 0004 — A node, and how it joins
- 0005 — The node host
- 0006 — The substrate and the control plane
- 0007 — Connectivity
- 0008 — A context owns its store, exclusively
- 0028 — The substrate supplies the control plane and nothing else
What runs on them, and how it gets there
- 0009 — Modules and the graph
- 0010 — Delivery
- 0024 — Model access is a provision, and a licence is a thing with a name
- 0026 — The mesh has a session of its own, and it is the node session's mechanism
- 0027 — A provision names what the consumer is coupled to, not the role it plays
How it is built
- 0011 — Managed files are generated onto nodes and never edited there
- 0012 — The mesh creates no symlinks — a derived file is a copy
- 0013 — Schema and state changes are numbered migrations, in the same language as the code
- 0014 — No workspace — each module is a standalone package consuming published dependencies
- 0015 — Applications live in their own repository; the monorepo is for the mesh
- 0016 — The lab
How it is checked
- 0017 — A test defends a decision
- 0018 — A picture of a system is read from the system, never from what asked for it
How we work
- 0019 — How this repository works
- 0020 — The mesh is governed by a constitution, injected where work is decided
- 0021 — HQ is the source of the mesh constitution
- 0022 — The constitution absorbs what is already enforced
- 0023 — The approval is the checkpoint, not the second pair of hands
- 0025 — The design record is read where it is written, never copied to be found