ADR 0152: the operator's surface is a module, the console

The work order's group-3 question answered: an ordinary module the mesh assigns to the machine a
person sits at, holding a minted credential, calling tools under a manifest grant (invokes), serving
MCP on loopback. Design 34; pointers in 33, 25 and 0095; module check designed into 12 (issue 148);
README stops claiming an indexing nothing provides (issue 006).

03-DESIGN/01-to-be/12-a-module-repository.md

@@ -7,9 +7,10 @@ code:
   - mesh-controller internal/catalogue/build.go
   - mesh-controller internal/inventory/secrets.go
   - mesh-controller cmd/mesh-builder
-updated: 2026-09-12
+updated: 2026-09-30
 decisions:
   - 02-DECISIONS/0069-a-module-is-a-repository-and-a-path.md
+  - 02-DECISIONS/0037-where-a-module-lives.md
   - 02-DECISIONS/0009-modules-and-the-graph.md
   - 02-DECISIONS/0010-delivery.md
   - 02-DECISIONS/0005-the-node-host.md
@@ -60,6 +61,32 @@ module from a repository and a path, and the root-only reading left every existi
 unbuildable — pointed at the catalogue the builder finds no manifest, pointed at a module's source
 it finds no manifest either.*
 
+## A manifest is checked where it is written
+
+*Added 2026-09-30, from [issue 148](../../04-ISSUES/148-a-manifest-outside-this-catalogue-has-no-check/00-report.md).*
+
+The check the mesh applies at registration — the manifest parses strictly, every name in it is a
+usable one, its routes and events and seats are well formed, and no two manifests given together
+declare one seat — is a verb on the controller's binary, `module check <manifest>…`, and it needs no
+mesh. It reads the files it is given, runs the same functions registration runs, prints every problem
+in the manifest's own words, and exits non-zero if there was one. Somebody describing their own
+application in their own repository — the case [ADR 0037](../../02-DECISIONS/0037-where-a-module-lives.md)
+calls the one that matters most — runs it before pushing, and finds out there rather than when a
+running mesh refuses the registration, or later, when a machine applies something that resolved and
+should not have.
+
+**What it cannot know, it says.** A seat another module declares elsewhere is unknown to a check that
+was not handed that module's manifest, and the output says so rather than refusing: pass the other
+manifest too. The mesh's own seats it knows from the binary, which is the one place that set may be
+read without a store ([ADR 0122](../../02-DECISIONS/0122-a-seat-is-data-a-rename-is-a-database-update.md)
+keeps the store authoritative, so a claim on a mesh seat is judged fully only at registration, and the
+check says that too).
+
+*How it is checked:* the controller's test runs the check over the catalogue checkout beside it and
+over a manifest with a known fault, and asserts the first passes and the second names the fault; the
+test that used to be the only check, `TestEveryCatalogueManifestParses`, now stands beside a command
+anybody can run.
+
 ## The manifest in the repository is not the manifest the mesh holds
 
 A resource names an artifact: