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-tool-catalog.ts

@@ -34,6 +34,8 @@ import * as ToolCordis from '@deepseek-ai/dsh-tool-cordis'
 import * as ToolFs from '@deepseek-ai/dsh-tool-fs'
 import * as ToolFsSearch from '@deepseek-ai/dsh-tool-fs-search'
 import * as ToolGoal from '@deepseek-ai/dsh-tool-goal'
+import Lsp from '@deepseek-ai/dsh-lsp'
+import * as ToolLsp from '@deepseek-ai/dsh-tool-lsp'
 import * as ToolSkill from '@deepseek-ai/dsh-tool-skill'
 import * as ToolTasks from '@deepseek-ai/dsh-tool-tasks'
 import * as ToolTodo from '@deepseek-ai/dsh-tool-todo'
@@ -255,6 +257,20 @@ const TOOL_PACKAGES: ToolPackage[] = [
     note:
       'create, edit, pause, and resume require direct-human root authority; complete and blocked also accept the exact current goal round. The default blocked lower bound is three admitted rounds.',
   },
+  {
+    pkg: '@deepseek-ai/dsh-tool-lsp',
+    dir: 'tool-lsp',
+    source: 'packages/lsp/tool-lsp/src/index.ts',
+    requires: ['ctx.tools', 'ctx.lsp', 'ctx.systemPrompt'],
+    writes: ['tool/call', 'tool/result'],
+    async mount(ctx) {
+      // The tool registers from the seam alone; the schema does not depend on any provider.
+      await ctx.plugin(Lsp)
+      await ctx.plugin(ToolLsp)
+    },
+    note:
+      'The lsp tool keeps provider selection and language-server subprocesses behind ctx.lsp, so its model-visible schema stays stable across providers. Requires a registered provider (e.g. `@deepseek-ai/dsh-lsp-local`) at runtime; without one, a query returns the structured `LSP_UNAVAILABLE` error rather than changing the schema.',
+  },
   {
     pkg: '@deepseek-ai/dsh-tool-ralph',
     dir: 'tool-ralph',