Merge commit 'refs/codex/unblock/master-current' into HEAD

# Conflicts:
#	docs/event-producer-consumer.md
#	examples/acp-agent/tests/snapshots/bash-spill/session.jsonl
#	examples/acp-agent/tests/snapshots/escalation-approved/session.jsonl
#	examples/acp-agent/tests/snapshots/escalation-rejected/session.jsonl
#	examples/acp-agent/tests/snapshots/fs-escalation-approved/session.jsonl
#	examples/acp-agent/tests/snapshots/hook-cc-pretool-ask/session.jsonl
#	packages/context/workspace-context/tests/workspace-context.spec.ts
#	packages/core/agent/src/index.ts
#	packages/support/invariants/tests/invariants.spec.ts
#	packages/ui/acp/src/index.ts
#	packages/ui/tui/tests/harness.ts
#	packages/ui/tui/tests/tui.spec.ts

packages/examples/agent-spine-demo/tests/agent-core.spec.ts

@@ -12,6 +12,10 @@ import LocalFileSystem from '@deepseek-ai/dsh-fs-local'
 import { MockAdapter, textResponse } from '../../../core/agent-loop/tests/mock-adapter.ts'
 import { CallId, LlmAdapter, LlmError, type GenerateOptions, type Message, type StreamChunk } from '@deepseek-ai/dsh-llm'
 import type { ToolExecution } from '@deepseek-ai/dsh-tools'
+import * as sessionInvariant from '@deepseek-ai/dsh-session/invariant'
+import * as agentInvariant from '@deepseek-ai/dsh-agent/invariant'
+import * as scopeInvariant from '@deepseek-ai/dsh-scope/invariant'
+import * as agentLoopInvariant from '@deepseek-ai/dsh-agent-loop/invariant'
 
 const testToolSignal = new AbortController().signal
 
@@ -46,7 +50,14 @@ async function mount(config: agentCore.Config, withBash = false): Promise<Contex
   process.env.DSH_HOME = await mkdtemp(join(tmpdir(), 'dsh-agent-spine-demo-home-'))
   process.env.DSH_AGENTS_HOME = await mkdtemp(join(tmpdir(), 'dsh-agent-spine-demo-agents-'))
   const ctx = new Context()
-  if (withBash) ctx.provide('bash', { sandboxMode: undefined })
+  if (withBash) {
+    ctx.provide('bash', {
+      sandboxMode: undefined,
+      resolve() { throw new Error('composition test does not execute bash') },
+      run() { throw new Error('composition test does not execute bash') },
+      start() { throw new Error('composition test does not execute bash') },
+    })
+  }
   try {
     await ctx.plugin(agentCore, config)
     // The bundle mounts its children inside apply() (not awaited there); let their
@@ -125,6 +136,7 @@ describe('dsh-agent-spine-demo bundle', () => {
     expect(ctx.get('skills')).toBeDefined()
     expect(ctx.get('agents')).toBeDefined()
     expect(ctx.get('tasks')).toBeDefined()
+    expect(ctx.get('invariants')).toBeDefined()
     expect(ctx.get('agentLoop')).toBeDefined()
     expect(ctx.get('goals')).toBeUndefined()
     await ctx.fiber.dispose()
@@ -158,6 +170,28 @@ describe('dsh-agent-spine-demo bundle', () => {
     await ctx.fiber.dispose()
   })
 
+  it('mounts package companions and forwards invariant selection config', async () => {
+    const nestedTurn = (ctx: Context): void => {
+      const session = ctx.sessions.create()
+      session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
+      session.append('turn/start', { turn: 2, trigger: { kind: 'message', source: { kind: 'user' } } })
+    }
+
+    const enabled = await mount({ workspaceContext: false })
+    expect(() => { nestedTurn(enabled) }).toThrow(/turn 1 is still open/)
+    await enabled.fiber.dispose()
+
+    for (const invariants of [
+      { enabled: false },
+      { package_allowlist: ['^@deepseek-ai/dsh-agent$'] },
+      { package_blocklist: ['^@deepseek-ai/dsh-session$'] },
+    ]) {
+      const filtered = await mount({ workspaceContext: false, invariants })
+      expect(() => { nestedTurn(filtered) }).not.toThrow()
+      await filtered.fiber.dispose()
+    }
+  })
+
   it('loads and configures bounded request recovery for every bundled front door', async () => {
     const adapter = new TransientOnceAdapter()
     const ctx = await mount({
@@ -461,6 +495,7 @@ describe('dsh-agent-spine-demo bundle', () => {
       skills: { enabled: false },
       toolBash: { enableRunInBackground: false },
       toolTasks: false as const,
+      invariants: { enabled: false },
       llmRetry: { maxTransientRetries: 1, jitterRatio: 0 },
     }
 
@@ -473,6 +508,7 @@ describe('dsh-agent-spine-demo bundle', () => {
       skills: appConfig.skills,
       toolBash: appConfig.toolBash,
       toolTasks: appConfig.toolTasks,
+      invariants: appConfig.invariants,
       llmRetry: appConfig.llmRetry,
     })
     expect(agentCore.pickSpineConfig({ workspaceContext: false })).toEqual({ workspaceContext: false })
@@ -534,4 +570,16 @@ describe('dsh-agent-spine-demo bundle', () => {
     expect(unwrapped.Config).toBeDefined()
     expect(typeof unwrapped.apply).toBe('function')
   })
+
+  it('keeps each standard-spine invariant companion loadable through the real Loader unwrap path', () => {
+    const loader = Object.create(Loader.prototype) as Loader
+    for (const companion of [sessionInvariant, agentInvariant, scopeInvariant, agentLoopInvariant]) {
+      expect('default' in companion).toBe(false)
+      const unwrapped = loader.unwrapExports(companion) as Record<string, unknown>
+      expect(unwrapped).toBe(companion)
+      expect(typeof unwrapped.name).toBe('string')
+      expect(unwrapped.inject).toContain('invariants')
+      expect(typeof unwrapped.apply).toBe('function')
+    }
+  })
 })