claude-code: launched over stdio (ADR 0193), the console's five tools in its instructions (ADR 0195)

Every bundle is now a child speaking MCP over stdio, so stdout is the channel: the module logs on
stderr. The managed CLAUDE.md teaches mesh_search, mesh_describe, mesh_call, mesh_overview and
mesh_machine with addresses (<seat>.<verb>, <node>/<module>.<tool>) instead of flat tool names.
A hand-over is applied whatever the trailing render says; a failed render is reported beside it.
Proven over stdio as the runtime drives it: five tools listed, a key made on first use, a sealed
switch writing an access-token-only 0600 credentials file that keeps unknown keys.

modules/claude-code/test/render.test.ts

@@ -30,7 +30,8 @@ test("the instruction file names the node and its role, and no other node", () =
   const md = render(facts, { role: "the laptop" }, null, "/h")["CLAUDE.md"];
   assert.match(md, /\*\*Node:\*\* `workstation`/);
   assert.match(md, /\*\*Role:\*\* the laptop/);
-  assert.match(md, /records\.records_search/);
+  assert.match(md, /mesh_call/);
+  assert.match(md, /records_search/);
 });
 
 test("rendering is deterministic, so an unchanged input writes nothing", () => {