Merge remote-tracking branch 'origin/codex/invariant-service-seam' into codex/invariant-package-registration-gate

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-19-package-owned-invariant-service.i18n.yaml
#	docs/core-data-structures/session.md
#	docs/module-graph.md
#	package.json
#	packages/sdk/scripts/tsconfig.json

packages/core/tools/src/index.ts

@@ -139,7 +139,7 @@ export interface ToolDefinition extends ToolSchema {
    * Opted-in executions must not mutate parent-owned state. Shared state must
    * tolerate concurrent dispatch; recorder races are permitted only when they
    * commute or fail closed. See the
-   * [parallel-tool-call RFC](../../../../docs/rfc/implemented/feature/2026-07-10-parallel-tool-call-execution.md)
+   * [parallel-tool-call Agent Note](../../../../.agents/notes/implemented/feature/2026-07-10-parallel-tool-call-execution.md)
    * for the full contract.
    * @param args - parsed arguments; `defineTool` validates before calling.
    * @returns Whether this call may join a parallel group.

packages/core/tools/src/ts-types.ts

@@ -75,7 +75,7 @@ export function jsonSchemaToTs(schema: unknown, indent = 0): string {
   }
 }
 
-/** The fixed model-facing usage contract rendered above the declarations (see the Code Mode RFC's "What the model sees"). */
+/** The fixed model-facing usage contract rendered above the declarations (see the Code Mode Agent Note's "What the model sees"). */
 const SDK_INSTRUCTIONS = `## Writing code for run_code
 
 Pass \`run_code\` the body of an async TypeScript function (erasable syntax only — no \`enum\` or namespaces; type annotations are advisory, the code runs type-stripped). Inside the program: