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.
Its runtime is a tool host: it connects to the mesh's broker before it does
anything else. The module declares own-secrets.broker, and then its container
neither mounts that file nor names it, so the runtime started and said there was
no broker to reach, forever, in a restart loop.
lavinmq's runtime container does both, and is the shape this follows.
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 line in postgres's recipe and a one-line file in amqp-ping, both added to
move a commit and watch the mesh notice. The proofs worked; neither was meant
to stay. MESH_MODULE is set from the sealed credential at run time anyway, so
baking it in was dead weight as well as noise.
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.
`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.
A module's runtime image was assembled by a script copying the sdk and the tool
runtime out of neighbouring checkouts, so it could only be built on a workstation
that had them. That is why no module declared what it was made of and why
forty-seven point at a placeholder.
The tool runtime becomes an image a module's runtime is built FROM, published like
any other artifact. The module then builds from its own directory and that base —
one clone, which is what the builder can actually be asked for (novox/hq ADR 0069).
The dependency stops being a property of somebody's machine and becomes a build
edge, pinned to a digest the mesh's registry assigned.
The compiler is invoked by its real path rather than through node_modules/.bin:
those are symlinks to a launcher that requires its library relatively, and
resolving them while building the base leaves a launcher pointing at nothing.
Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx
lavinmq becomes a provider of a user-facing amqp interface: a consumer
that requires a message queue is given its OWN broker — a scoped vhost
and user on a lavinmq provider — not an account on the mesh's own
control-plane broker (ADR 0048). Vhost-per-login is the isolation model,
the exact analog of postgres's database-per-login: the provider names a
vhost after the consumer's login and a user with full rights on that
vhost and none elsewhere, so a login is a broker the consumer alone can
reach.
The provider drives lavinmq through its HTTP management API (client.ts,
the module's one impure seam), with a run-once bootstrap that computes
the RabbitMQ-compatible password hash lavinmq's config wants from the
plain admin secret the mesh mints — the value no ${secret:...}
placeholder can produce and the reason the bootstrap exists (ADR 0052).
serves.amqp carries the port so consumers reference ${bound:amqp:port}.
amqp-ping is a demo consumer: it contributes nothing (the vhost is the
login), reads its grant from an env-file the mesh fills, and uses
${bound:amqp:as} for BOTH its username and its vhost — the db-name
lesson applied to AMQP. It speaks AMQP 0-9-1 over a raw socket with no
npm dependency (the way redis speaks RESP) and round-trips one message.
It carries a slug so its identity fits the 20-char backend bound
(ADR 0049).
Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF
jschoubben