ADR 0195: the mesh's tools are found by address, not announced whole; research 021; to-be 34 §3a

03-DESIGN/01-to-be/34-the-console.md

@@ -1,9 +1,10 @@
 ---
 layer: to-be
-status: implemented
+status: designed
 code: [mesh-catalog, mesh-tools, mesh-controller]
-updated: 2026-10-02
+updated: 2026-10-03
 decisions:
+  - 02-DECISIONS/0195-the-meshs-tools-are-found-by-address-not-announced-whole.md
   - 02-DECISIONS/0160-the-mesh-issues-an-assignments-subjects-and-a-runtime-serves-what-it-is-issued.md
   - 02-DECISIONS/0159-a-tool-call-names-the-machine-and-a-holder-serves-its-seats-verbs.md
   - 02-DECISIONS/0152-the-operators-surface-is-a-module-the-console.md
@@ -93,6 +94,23 @@ prerequisites are listed in that record. When the seat serves them, the console
 modules' own, and the person stops opening a shell for the mesh's own questions. Until then the console
 says so in its handshake.
 
+## 3a. Found by address, not announced whole (2026-10-03)
+
+*By [ADR 0195](../../02-DECISIONS/0195-the-meshs-tools-are-found-by-address-not-announced-whole.md);
+this section governs where it and §2–§3 disagree.* The console announces five tools —
+`mesh_overview`, `mesh_machine`, `mesh_search`, `mesh_describe`, `mesh_call` — and every tool the mesh
+answers is reached through them by its address: `<seat>.<verb>` for a seat held once for the mesh,
+`<node>/<seat>.<verb>` for one held per machine, `<node>/<module>.<tool>` for an assignment, and
+`<module>.<tool>` as well for a module whose instances are interchangeable. A module that is not
+interchangeable is called with its machine or refused with the machines it runs on. Each discovery
+verb asks the mesh when it is called, so nothing is kept for a session's length; the flat catalogue
+stays reachable through the `mesh` client and a setting, unannounced.
+
+*Found 2026-10-03, measuring for that record:* §3's statement that a stateful module on two machines is
+listed once per machine does not hold on the live console — postgres and mssql are listed once, `node`
+optional, answered by whichever instance replies. The address replaces that statement rather than
+repairing it.
+
 ## 4. Where it runs
 
 On whichever machines an operator sits at, by assignment. It is not on the control node by default and