Merge remote-tracking branch 'origin/master' into feat/plan-mode

Master arrivals re-grafted onto the plan-mode surfaces:
- Package invariant runtime contracts: every package owns ./invariant —
  added the dsh-mode companion (mode/set payload validation: non-empty
  trimmed name), its unit spec, exports/peer wiring, and the mode group in
  the tsconfig invariant paths glob.
- Interception waterfalls gained an AbortSignal parameter
  (agent/prompt-submit, agent/turn-continuation) and ToolExecutionInput.signal
  became required: listeners and test dispatch updated; the exit tool now
  forwards exec.signal unconditionally.
- TUI question dialog: master's position/unanswered header layout kept,
  the plan-review detail block re-grafted between question and answers.
- LSP capability family arrived: lsp tool joins the catalog pin, dsh-lsp
  examples deps beside dsh-mode; lsp-definition snapshot refreshed with
  the mode command and modes advertisement.
- docs/architecture.md and packages/README.md regenerated tables re-grafted
  (ctx.modes row, mode package row) and condensed within word ceilings.
- examples/acp-agent cordis.yml: kept the deployment-owned plan instructions
  (incl. the conversational-agreement sentence) beside master's routed-model
  compaction comment; snapshot expected outputs refreshed keyless and noise
  fixtures restored.

scripts/gen-doc-graphs.ts

@@ -110,9 +110,17 @@ const SERVICE_ROLES: ServiceRole[] = [
     pkg: 'session',
     title: 'In-memory session store',
     mode: 'core',
-    consumers: ['agent-loop', 'agent', 'cli-demo', 'session-persistence', 'session-query', 'subagent-inprocess', 'invariants'],
+    consumers: ['agent-loop', 'agent', 'cli-demo', 'session-persistence', 'session-query', 'subagent-inprocess'],
     note: 'Owns append-only Session instances and emits the durable session event feed.',
   },
+  {
+    key: 'invariants',
+    pkg: 'invariants',
+    title: 'Package-owned invariant registry',
+    mode: 'core',
+    consumers: ['session', 'agent', 'scope', 'agent-loop'],
+    note: 'Companion subpaths register owner-local checks; the service owns selection, uniqueness, child fibers, and package-attributed failures.',
+  },
   {
     key: 'sessionPersistence',
     pkg: 'session-persistence',
@@ -184,7 +192,7 @@ const SERVICE_ROLES: ServiceRole[] = [
     pkg: 'agent',
     title: 'Agent service',
     mode: 'core',
-    consumers: ['agent-loop', 'acp', 'cli-demo', 'subagent-inprocess', 'tui-demo', 'invariants'],
+    consumers: ['agent-loop', 'acp', 'cli-demo', 'subagent-inprocess', 'tui-demo'],
     note: 'Owns live Agent handles, the create/resume factory seam, and process-local initiator propagation.',
   },
   {