Merge remote-tracking branch 'origin/master' into feat/todo-multi-in-progress

2026-08-06 11:25:28 +08:00
parent 9794c793c2 e88bace07e
commit e0a7f40f04
3992 changed files with 241706 additions and 57716 deletions
--- a/examples/headless-agent/README.i18n.yaml
+++ b/examples/headless-agent/README.i18n.yaml
@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write examples/headless-agent/README.md
-README.md: 445804a2611e5e8093eadf345ad10a2a7984c012
-README.zh.md: 956bc82e77f79c3f05e4b51297fd5365e6e89be1
+README.md: 670a91ab402cf98585f2ece70787beb3b4aaf4dc
+README.zh.md: 6c8b3b5694403c5e09f2904f5c3ca18fe569163e
--- a/examples/headless-agent/README.md
+++ b/examples/headless-agent/README.md
@@ -19,8 +19,8 @@ Exactly one nonblank positional task is required; quote tasks containing spaces.

 Each invocation creates and persists a fresh session, runs all model and tool steps in one turn, flushes, disposes, and exits. This is non-interactive automation: there is no prompt, approval, resume, second turn, or stdin context. The configured tools can mutate the launch workspace, run commands, spawn child agents, and consume provider tokens.

-## Advanced and snapshot wiring
+## Advanced configuration

-[`advanced.cordis.yml`](advanced.cordis.yml) adds Code Mode and the Cordis tools to the shipped leaf. [`advanced.cordis.snapshot.yml`](advanced.cordis.snapshot.yml) replaces only the live LLM with replay. The tests under [`tests/`](tests/) own the keyless real-Loader smoke, key-gated world-verified smoke, and the `stream-json` replay snapshot with its parent and child session fixtures.
+[`advanced.cordis.yml`](advanced.cordis.yml) adds Code Mode and the Cordis tools to the shipped leaf.

 The package-level [CLI contract](../../packages/examples/cli-demo/README.md) documents output records, exit status, cancellation, persistence, and model/token effects.
--- a/examples/headless-agent/README.zh.md
+++ b/examples/headless-agent/README.zh.md
@@ -19,8 +19,8 @@ pnpm run demo:headless --output-format stream-json -- "run the focused tests"

 每次调用都会创建并持久化新会话，在一个轮次中运行所有模型和工具步骤，然后刷写持久化数据、执行 dispose（资源释放），再退出。这是非交互式自动化：没有提示符、批准、恢复、第二轮次或 stdin 上下文。已配置工具可以修改启动时所在的工作区、运行命令、spawn 子 agent，并消耗提供方 token。

-## 高级与快照接线
+## 高级配置

-[`advanced.cordis.yml`](advanced.cordis.yml) 在已交付叶节点上添加 Code Mode 和 Cordis 工具。[`advanced.cordis.snapshot.yml`](advanced.cordis.snapshot.yml) 只将实时 LLM（大语言模型）替换为回放。[`tests/`](tests/) 下涵盖无密钥真实 Loader 冒烟测试、密钥门控的外部状态验证冒烟测试，以及带父子会话 fixture（测试前置数据）的 `stream-json` 回放快照。
+[`advanced.cordis.yml`](advanced.cordis.yml) 在已交付叶节点上添加 Code Mode 和 Cordis 工具。

-这份包（package）级 [CLI（命令行界面）契约](../../packages/examples/cli-demo/README.md) 说明输出记录、退出状态、取消、持久化以及模型／token 影响。
+这份包级 [CLI（命令行界面）契约](../../packages/examples/cli-demo/README.md) 说明输出记录、退出状态、取消、持久化以及模型／token 影响。
--- a/examples/headless-agent/advanced.cordis.snapshot.yml
+++ b/examples/headless-agent/advanced.cordis.snapshot.yml
@@ -18,7 +18,7 @@
      - id: cli-agent
        name: '@deepseek-ai/dsh-cli-demo'
        config:
-          provider: deepseek
+          provider: deepseek-official
          model: deepseek-v4-flash
          persistenceRoot: './.sessions'
          # Replay fixtures are raw JSONL; the whole-config patch must restate
--- a/examples/headless-agent/advanced.cordis.yml
+++ b/examples/headless-agent/advanced.cordis.yml
@@ -7,7 +7,7 @@
      - id: cli-agent
        name: '@deepseek-ai/dsh-cli-demo'
        config:
-          provider: deepseek
+          provider: deepseek-official
          model: deepseek-v4-pro
          persistenceRoot: './.sessions'
          persistenceCompression: !!js "process.env.DSH_SNAPSHOT === undefined ? 'zstd' : 'none'"
--- a/examples/headless-agent/composition.md
+++ b/examples/headless-agent/composition.md
@@ -8,6 +8,10 @@ The headless demo combines the real DeepSeek adapter and coding capabilities wit
 ```mermaid
 flowchart LR
  cfg["examples/headless-agent<br/>cordis.yml"]
+  plugin_headless_settings["settings<br/>@deepseek-ai/dsh-settings-local"]
+  cfg --> plugin_headless_settings
+  plugin_headless_credentials["credentials<br/>@deepseek-ai/dsh-credentials-local"]
+  cfg --> plugin_headless_credentials
  plugin_headless_llm_deepseek["llm-deepseek<br/>@deepseek-ai/dsh-llm-deepseek"]
  cfg --> plugin_headless_llm_deepseek
  plugin_headless_subprocess["subprocess<br/>@deepseek-ai/dsh-subprocess-local"]
@@ -33,6 +37,10 @@ flowchart LR
  cfg --> plugin_headless_subagent_spawn
  plugin_headless_subagent_fork["subagent-fork<br/>@deepseek-ai/dsh-subagent-fork"]
  cfg --> plugin_headless_subagent_fork
+  plugin_headless_tool_subagent_control["tool-subagent-control<br/>@deepseek-ai/dsh-tool-subagent-control"]
+  cfg --> plugin_headless_tool_subagent_control
+  plugin_headless_tool_subagent_report["tool-subagent-report<br/>@deepseek-ai/dsh-tool-subagent-report"]
+  cfg --> plugin_headless_tool_subagent_report
  plugin_headless_tool_subagent["tool-subagent<br/>@deepseek-ai/dsh-tool-subagent"]
  cfg --> plugin_headless_tool_subagent
  plugin_headless_tool_subagent_fork["tool-subagent-fork<br/>@deepseek-ai/dsh-tool-subagent"]
@@ -55,6 +63,8 @@ flowchart LR

 | Plugin id | Package / module |
 | --- | --- |
+| `settings` | `@deepseek-ai/dsh-settings-local` |
+| `credentials` | `@deepseek-ai/dsh-credentials-local` |
 | `llm-deepseek` | `@deepseek-ai/dsh-llm-deepseek` |
 | `subprocess` | `@deepseek-ai/dsh-subprocess-local` |
 | `bash` | `@deepseek-ai/dsh-bash-local` |
@@ -64,6 +74,8 @@ flowchart LR
 | `subagent` | `@deepseek-ai/dsh-subagent` |
 | `subagent-spawn` | `@deepseek-ai/dsh-subagent-spawn` |
 | `subagent-fork` | `@deepseek-ai/dsh-subagent-fork` |
+| `tool-subagent-control` | `@deepseek-ai/dsh-tool-subagent-control` |
+| `tool-subagent-report` | `@deepseek-ai/dsh-tool-subagent-report` |
 | `tool-subagent` | `@deepseek-ai/dsh-tool-subagent` |
 | `tool-subagent-fork` | `@deepseek-ai/dsh-tool-subagent` |
 | `workflow-workerthread` | `@deepseek-ai/dsh-workflow-workerthread` |
--- a/examples/headless-agent/cordis.yml
+++ b/examples/headless-agent/cordis.yml
@@ -1,16 +1,28 @@
 # One-shot coding agent with format-pure stdout. The app bin loads the
-# gitignored root `.env`; this file reads `DEEPSEEK_API_KEY` and optional
-# `DEEPSEEK_BASE_URL` through `!!js`.
+# gitignored root `.env` into the process environment; entry configs here are
+# the composition base, while user-plane values resolve per request through
+# the two providers below.
+
+# User-settings document (`$DSH_HOME/settings.yaml`, hot-reloaded): a
+# `llm-deepseek:` section there overrides the adapter entry below without a
+# restart.
+- id: settings
+  name: '@deepseek-ai/dsh-settings-local'
+
+# Credential store: the live process environment over `$DSH_HOME/.env`
+# (owner-only file, hot-reloaded). The adapter resolves `DEEPSEEK_API_KEY`
+# through it at each request, so no key is inlined in this file.
+- id: credentials
+  name: '@deepseek-ai/dsh-credentials-local'

 # The DeepSeek adapter. Swap to '@deepseek-ai/dsh-llm-pi-ai' for the pi-ai-backed
-# twin (same config shape; `reasoning: high` replaces thinking/reasoningEffort).
-# Shipped default: full thinking at max effort on every request (wire-only
-# defaults; they never enter the request header).
+# twin (a `providers` dict keyed by route; `reasoning: high` replaces
+# thinking/reasoningEffort). Shipped default: full thinking at max effort on
+# every request. Exact-model resolution materializes request defaults before
+# the request header is logged.
 - id: llm-deepseek
  name: '@deepseek-ai/dsh-llm-deepseek'
  config:
-    apiKey: !!js process.env.DEEPSEEK_API_KEY
-    baseURL: !!js process.env.DEEPSEEK_BASE_URL
    thinking: enabled
    reasoningEffort: max
    models:
@@ -32,7 +44,7 @@
 - id: cli-agent
  name: '@deepseek-ai/dsh-cli-demo'
  config:
-    provider: deepseek
+    provider: deepseek-official
    # Stays on flash: the goal/ralph replay corpora were recorded on it, and
    # their nested-include overlays cannot re-pin the app config (a config
    # patch cannot target an entry behind a nested include).
@@ -74,11 +86,21 @@
  config:
    providerName: fork

+# Continuable background children are selected per delegation tool. The
+# separately loaded control registers global `send_message`; `report` is
+# installed only in continuable child scopes.
+- id: tool-subagent-control
+  name: '@deepseek-ai/dsh-tool-subagent-control'
+
+- id: tool-subagent-report
+  name: '@deepseek-ai/dsh-tool-subagent-report'
+
 - id: tool-subagent
  name: '@deepseek-ai/dsh-tool-subagent'
  config:
    provider: spawn
    toolName: subagent
+    backgroundMode: continuable
    maxDepth: 1

 - id: tool-subagent-fork
@@ -86,6 +108,7 @@
  config:
    provider: fork
    toolName: subagent_fork
+    backgroundMode: continuable
    maxDepth: 1

 # The worker-thread workflow engine fans a model-written JavaScript script's
--- a/examples/headless-agent/credentials.cordis.snapshot.yml
+++ b/examples/headless-agent/credentials.cordis.snapshot.yml
@@ -0,0 +1,18 @@
+# Keyless dynamic-configuration composition: the base settings and credentials
+# providers see only the isolated run home, no API key exists anywhere, and
+# the deepseek-official route still registers — so the prompt fails with the actionable
+# MISSING_CREDENTIAL guidance this snapshot pins as first-run UX.
+- id: base
+  name: '@cordisjs/plugin-include'
+  config:
+    path: ./cordis.yml
+    patches:
+      - id: llm-deepseek
+        name: '@deepseek-ai/dsh-llm-deepseek'
+        disabled: true
+      - insert:
+          # The endpoint is never dialed: credential resolution fails first.
+          - id: llm-deepseek-keyless
+            name: '@deepseek-ai/dsh-llm-deepseek'
+            config:
+              baseURL: 'http://127.0.0.1:9'
--- a/examples/headless-agent/pty.cordis.snapshot.yml
+++ b/examples/headless-agent/pty.cordis.snapshot.yml
@@ -8,6 +8,10 @@
        name: '@deepseek-ai/dsh-llm-deepseek'
        disabled: true
      - insert:
+          - id: sandbox-policy
+            name: '@deepseek-ai/dsh-sandbox-policy'
+            config:
+              mode: danger-full-access
          - id: pty
            name: '@deepseek-ai/dsh-pty'
          - id: pty-snapshot-backend
--- a/examples/headless-agent/subagent-inheritance.cordis.snapshot.yml
+++ b/examples/headless-agent/subagent-inheritance.cordis.snapshot.yml
@@ -16,11 +16,6 @@
 - id: replay
  name: '@deepseek-ai/dsh-llm-replay'

- id: bash
-  name: '@deepseek-ai/dsh-bash-local'
-  config:
-    timeoutMs: 60000
-
 # The confining filesystem stack: the wide deployment default lives on the
 # shared policy home; the seeded parent's read-only override must beat it
 # INSIDE the child for the scenario to deny.
@@ -39,6 +34,9 @@
 - id: tool-fs
  name: '@deepseek-ai/dsh-tool-fs'

+# This scenario probes filesystem confinement only, so the bash stack is absent:
+# without it the bundle's `toolBash: false` is required, because `tool-bash` would
+# otherwise wait forever for a `bash` executor this tree never mounts.
 - id: agent
  name: '@deepseek-ai/dsh-agent-spine-demo'
  config:
@@ -46,6 +44,7 @@
    workspaceContext: false
    skills:
      enabled: false
+    toolBash: false
    toolTasks: false
    goals: false

--- a/examples/headless-agent/tests/code-mode.e2e.ts
+++ b/examples/headless-agent/tests/code-mode.e2e.ts
@@ -1,7 +1,7 @@
 import { mkdtemp, mkdir, readFile, rm, writeFile } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
-import { afterEach, describe, expect, it } from 'vitest'
+import { afterEach, describe, expect, it, vi } from 'vitest'
 import { Context } from 'cordis'
 import LlmService, { createUserMessage, CallId, HarnessError  } from '@deepseek-ai/dsh-llm'
 import SessionStore, { SessionId } from '@deepseek-ai/dsh-session'
@@ -13,6 +13,7 @@ import AgentRegistry, { type Agent } from '@deepseek-ai/dsh-agent'

 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
+import * as BashEnvPlugin from '@deepseek-ai/dsh-bash-env'
 import LocalSubprocessService from '@deepseek-ai/dsh-subprocess-local'
 import * as ToolBash from '@deepseek-ai/dsh-tool-bash'
 import * as LlmDeepSeek from '@deepseek-ai/dsh-llm-deepseek'
@@ -57,6 +58,7 @@ async function codeModeHarness(cwd: string): Promise<Context> {
  await harness.plugin(AgentLoop, { agents: [] })
  await harness.plugin(LlmDeepSeek)
  await harness.plugin(LocalSubprocessService)
+  await harness.plugin(BashEnvPlugin)
  await harness.plugin(LocalBashExecutor, { cwd, timeoutMs: 30_000 })
  await harness.plugin(ToolBash)
  await harness.plugin(WorkerCodeRuntime, {})
@@ -117,6 +119,7 @@ async function backgroundCodeModeHarness(cwd: string): Promise<Context> {
  await harness.plugin(LocalTaskService)
  await harness.plugin(ToolTasks, {})
  await harness.plugin(LocalSubprocessService)
+  await harness.plugin(BashEnvPlugin)
  await harness.plugin(LocalBashExecutor, { cwd, timeoutMs: 30_000 })
  await harness.plugin(ToolBash)
  return harness
@@ -312,7 +315,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('Code Mode: real model writes a p
  it('collapses the wire tool list to [run_code], bridges sub-calls, and returns curated output', async () => {
    workdir = await mkdtemp(join(tmpdir(), 'dsh-code-mode-e2e-'))
    ctx = await codeModeHarness(workdir)
-    const agent = ctx.agentLoop.create(SessionId('e2e-code-mode'), { provider: 'deepseek', model: 'deepseek-v4-flash' })
+    const agent = ctx.agentLoop.create(SessionId('e2e-code-mode'), { provider: 'deepseek-official', model: 'deepseek-v4-flash' })

    agent.followup(createUserMessage({
      content: [{
@@ -354,7 +357,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('Code Mode: real model writes a p
    expect(finalText).toContain('beta-9')
  }, 180_000)

-  it('delivers nested workspace instructions discovered by an fs sub-call after the outer result', async () => {
+  it('projects nested workspace instructions discovered by an fs sub-call', async () => {
    workdir = await mkdtemp(join(tmpdir(), 'dsh-code-mode-workspace-e2e-'))
    await mkdir(join(workdir, '.git'), { recursive: true })
    await mkdir(join(workdir, 'pkg/deep'), { recursive: true })
@@ -364,7 +367,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('Code Mode: real model writes a p
    const handle = await ctx.agents.create({
      sessionId: SessionId('e2e-code-mode-workspace-session'),
      meta: { cwd: workdir },
-      agentOptions: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+      agentOptions: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
    })

    handle.agent.followup(createUserMessage({
@@ -377,16 +380,21 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('Code Mode: real model writes a p
    const events: SessionEvent[] = [...handle.agent.session.events]
    const dispatch = events.find(event => event.type === 'tool/code-dispatch' && event.data.name === 'read')
    const outerResult = events.find(event => event.type === 'tool/result')
-    const workspaceContext = events.find(event => event.type === 'user/message'
-      && event.data.source.kind === 'workspace-instructions')
+    const workspaceContext = await vi.waitFor(() => {
+      const splice = handle.agent.session.events.findLast(event => event.type === 'agent/inbox/spliced'
+        && event.data.inserted.some(message => message.source.kind === 'workspace-instructions'))
+      const inserted = splice?.type === 'agent/inbox/spliced'
+        ? splice.data.inserted.find(message => message.source.kind === 'workspace-instructions')
+        : undefined
+      expect(inserted).toBeDefined()
+      return inserted!
+    })
    expect(dispatch).toBeDefined()
    expect(outerResult).toBeDefined()
-    expect(workspaceContext).toBeDefined()
-    expect(workspaceContext!.seq).toBeGreaterThan(outerResult!.seq)
-    const finalMessage = events.findLast(event => event.type === 'assistant/message')
-    const answer = finalMessage?.type === 'assistant/message'
-      ? finalMessage.data.message.content.filter(block => block.type === 'text').map(block => block.text).join('')
-      : ''
-    expect(answer).toContain(WORKSPACE_PROBE)
+    const contextText = workspaceContext.content
+      .filter(block => block.type === 'text')
+      .map(block => block.text)
+      .join('\n')
+    expect(contextText).toContain(WORKSPACE_PROBE)
  }, 180_000)
 })
--- a/examples/headless-agent/tests/coding-task.e2e.ts
+++ b/examples/headless-agent/tests/coding-task.e2e.ts
@@ -55,7 +55,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('coding task: fix a failing test
    expect(before.status).not.toBe(0)

    ctx = await codingHarness(workdir, { persona: SYSTEM_PROMPT })
-    const agent = ctx.agentLoop.create(SessionId('e2e-task'), { provider: 'deepseek', model: 'deepseek-v4-flash' })
+    const agent = ctx.agentLoop.create(SessionId('e2e-task'), { provider: 'deepseek-official', model: 'deepseek-v4-flash' })

    agent.followup(createUserMessage({
      content: [{
--- a/examples/headless-agent/tests/compaction.e2e.ts
+++ b/examples/headless-agent/tests/compaction.e2e.ts
@@ -45,7 +45,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('compaction: a long session compa
      },
      persistenceRoot: join(workdir, '.sessions'),
    })
-    const agent = ctx.agentLoop.create(SessionId('e2e-compaction'), { provider: 'deepseek', model: 'deepseek-v4-flash' })
+    const agent = ctx.agentLoop.create(SessionId('e2e-compaction'), { provider: 'deepseek-official', model: 'deepseek-v4-flash' })

    agent.followup(createUserMessage({
      content: [{
--- a/examples/headless-agent/tests/fixtures/cli.cordis.yml
+++ b/examples/headless-agent/tests/fixtures/cli.cordis.yml
@@ -1,6 +1,9 @@
 - id: cli-mock-llm
  name: './cli-mock-llm.ts'

+- id: repository-plugin-fixture
+  name: './repository-plugin/load.mjs'
+
 - id: base
  name: '@cordisjs/plugin-include'
  config:
@@ -16,4 +19,8 @@
          model: cli-mock
          persistenceRoot: './.sessions'
          workspaceContext: false
+          dshHome: './.dsh-home'
+          skills:
+            local:
+              agentsHome: './.agents-home'
          persona: 'Keyless headless-agent smoke.'
--- a/examples/headless-agent/tests/fixtures/deepseek-defaults.cordis.yml
+++ b/examples/headless-agent/tests/fixtures/deepseek-defaults.cordis.yml
@@ -0,0 +1,17 @@
+- id: base
+  name: '@cordisjs/plugin-include'
+  config:
+    path: ../../cordis.yml
+    patches:
+      - id: llm-deepseek
+        config:
+          apiKey: snapshot-key
+          baseURL: !!js process.env.DSH_SNAPSHOT_BASE_URL
+          thinking: disabled
+      - id: cli-agent
+        config:
+          provider: deepseek-official
+          model: deepseek-v4-flash
+          persistenceRoot: './.sessions'
+          workspaceContext: false
+          persona: 'Keyless DeepSeek adapter defaults snapshot.'
--- a/examples/headless-agent/tests/fixtures/goal-domain/seed-goal.ts
+++ b/examples/headless-agent/tests/fixtures/goal-domain/seed-goal.ts
@@ -7,11 +7,13 @@ export const name = 'seed-goal'
 export const inject = ['goals']

 export function apply(ctx: Context): void {
-  ctx.on('agent/step', (agent) => {
-    if (ctx.goals.get(agent) !== undefined) return
-    ctx.goals.create(agent, {
-      objective: 'Prove the composed goal survives in the session log',
-      maxGoalRounds: 7,
-    })
+  ctx.on('agent/pre-step', (agent, _messages, _context, next) => {
+    if (ctx.goals.get(agent) === undefined) {
+      ctx.goals.create(agent, {
+        objective: 'Prove the composed goal survives in the session log',
+        maxGoalRounds: 7,
+      })
+    }
+    return next()
  })
 }
--- a/examples/headless-agent/tests/fixtures/repository-plugin/dsh-plugin-assets/skills/0/repository-fixture/SKILL.md
+++ b/examples/headless-agent/tests/fixtures/repository-plugin/dsh-plugin-assets/skills/0/repository-fixture/SKILL.md
@@ -0,0 +1,6 @@
+---
+name: repository-fixture
+description: Repository fixture skill.
+---
+
+Static instructions from a prepared repository plugin.
--- a/examples/headless-agent/tests/fixtures/repository-plugin/dsh-plugin.mjs
+++ b/examples/headless-agent/tests/fixtures/repository-plugin/dsh-plugin.mjs
@@ -0,0 +1,9 @@
+// Generated by dsh-plugin-prepare. Do not edit.
+const manifest = {"name":"headless-repository-fixture","skills":["dsh-plugin-assets/skills/0"]}
+export const name = "headless-repository-fixture"
+export const inject = ["loader","skills"]
+export async function apply(ctx) {
+  const runtime = ctx.loader.builtins["dsh-repository-plugin"]
+  if (runtime === undefined) throw new Error("missing Cordis builtin dsh-repository-plugin")
+  await ctx.plugin(runtime, { baseUrl: import.meta.url, manifest })
+}
--- a/examples/headless-agent/tests/fixtures/repository-plugin/load.mjs
+++ b/examples/headless-agent/tests/fixtures/repository-plugin/load.mjs
@@ -0,0 +1,13 @@
+/**
+ * Keyless fixture owner that mounts the runtime before its prepared wrapper.
+ * Cordis starts sibling Loader entries concurrently, so row order is not a dependency edge.
+ */
+import * as RepositoryPlugin from '@deepseek-ai/dsh-repository-plugin'
+import * as PreparedPlugin from './dsh-plugin.mjs'
+
+export const name = 'headless-repository-fixture-loader'
+
+export async function apply(ctx) {
+  await ctx.plugin(RepositoryPlugin)
+  await ctx.plugin(PreparedPlugin)
+}
--- a/examples/headless-agent/tests/fixtures/retry-snapshot-backend.mjs
+++ b/examples/headless-agent/tests/fixtures/retry-snapshot-backend.mjs
@@ -49,5 +49,5 @@ export const inject = ['llm']
 * @param {import('cordis').Context} ctx - plugin context carrying the LLM service.
 */
 export function apply(ctx) {
-  ctx.llm.registerAdapter(['deepseek'], new RetrySnapshotAdapter())
+  ctx.llm.registerAdapter(['deepseek-official'], new RetrySnapshotAdapter())
 }
--- a/examples/headless-agent/tests/fixtures/semantic-checkpoint-agent.ts
+++ b/examples/headless-agent/tests/fixtures/semantic-checkpoint-agent.ts
@@ -19,7 +19,7 @@ export const inject = ['agents', 'agentLoop', 'sessionPersistence']
 export async function apply(ctx: Context): Promise<void> {
  const handle = await ctx.agents.resume({
    resumeSessionId: 'semantic-checkpoint-unknown-outcome' as SessionId,
-    agentOptions: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+    agentOptions: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
  })
  ctx.effect(() => () => handle.dispose(), 'semantic-checkpoint-agent.handle')
 }
--- a/examples/headless-agent/tests/fixtures/startup-activation-error/activation-error.mjs
+++ b/examples/headless-agent/tests/fixtures/startup-activation-error/activation-error.mjs
@@ -0,0 +1,6 @@
+/** Fail activation with a deterministic stack so the user-visible startup diagnostic is snapshot-stable. */
+export function apply() {
+  const failure = new Error('startup activation snapshot failure')
+  failure.stack = 'Error: startup activation snapshot failure\n    at activation-error-fixture'
+  throw failure
+}
--- a/examples/headless-agent/tests/fixtures/startup-activation-error/cordis.yml
+++ b/examples/headless-agent/tests/fixtures/startup-activation-error/cordis.yml
@@ -0,0 +1,2 @@
+- id: activation-error
+  name: ./activation-error.mjs
--- a/examples/headless-agent/tests/fixtures/subagent-inheritance-agent.ts
+++ b/examples/headless-agent/tests/fixtures/subagent-inheritance-agent.ts
@@ -19,7 +19,7 @@ export const inject = ['agents', 'agentLoop', 'sessionPersistence']
 export async function apply(ctx: Context): Promise<void> {
  const handle = await ctx.agents.resume({
    resumeSessionId: 'subagent-inheritance-parent' as SessionId,
-    agentOptions: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+    agentOptions: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
  })
  ctx.effect(() => () => handle.dispose(), 'subagent-inheritance-agent.handle')
 }
--- a/examples/headless-agent/tests/fixtures/telemetry-otel.cordis.yml
+++ b/examples/headless-agent/tests/fixtures/telemetry-otel.cordis.yml
@@ -8,6 +8,10 @@
 - id: telemetry-redact-rule
  name: './telemetry-redact-rule.ts'

+# Managed child-process groups required by the bash executor.
+- id: subprocess
+  name: '@deepseek-ai/dsh-subprocess-local'
+
 - id: bash
  name: '@deepseek-ai/dsh-bash-local'

--- a/examples/headless-agent/tests/full-loop.e2e.ts
+++ b/examples/headless-agent/tests/full-loop.e2e.ts
@@ -29,7 +29,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('full loop: real model + real bas
  it('runs a bash command on request and reports its output', async () => {
    workdir = await mkdtemp(join(tmpdir(), 'dsh-full-loop-e2e-'))
    ctx = await codingHarness(workdir, { persona: SYSTEM_PROMPT })
-    const agent = ctx.agentLoop.create(SessionId('e2e-loop'), { provider: 'deepseek', model: 'deepseek-v4-flash' })
+    const agent = ctx.agentLoop.create(SessionId('e2e-loop'), { provider: 'deepseek-official', model: 'deepseek-v4-flash' })

    agent.followup(createUserMessage({ content: [{ type: 'text', text: 'Run `echo e2e-ok` with the bash tool and tell me its exact output.' }], source: { kind: 'user' } }))
    await waitForIdle(ctx, agent)
--- a/examples/headless-agent/tests/harness.ts
+++ b/examples/headless-agent/tests/harness.ts
@@ -4,6 +4,7 @@ import type { Agent } from '@deepseek-ai/dsh-agent'
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'
 import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
+import * as BashEnvPlugin from '@deepseek-ai/dsh-bash-env'
 import LocalSubprocessService from '@deepseek-ai/dsh-subprocess-local'
 import * as ToolBash from '@deepseek-ai/dsh-tool-bash'
 import * as ToolTodo from '@deepseek-ai/dsh-tool-todo'
@@ -62,6 +63,7 @@ export async function codingHarness(workdir: string, options: CodingHarnessOptio
    models: [{ id: 'deepseek-v4-flash', contextWindow: options.modelContextWindow }],
  })
  await ctx.plugin(LocalSubprocessService)
+  await ctx.plugin(BashEnvPlugin)
  await ctx.plugin(LocalBashExecutor, { cwd: workdir, timeoutMs: 30_000 })
  await ctx.plugin(ToolBash)
  await ctx.plugin(ToolTodo, { allowParallelInProgress: true })
--- a/examples/headless-agent/tests/headless.snapshot.ts
+++ b/examples/headless-agent/tests/headless.snapshot.ts
@@ -1,4 +1,6 @@
 import { readFile, readdir, writeFile } from 'node:fs/promises'
+import { createServer } from 'node:http'
+import type { IncomingMessage, ServerResponse } from 'node:http'
 import { delimiter, dirname, join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import {
@@ -27,11 +29,16 @@ const goalScenarioDir = join(snapshotsDir, 'goal-tools')
 const goalConfigPath = fileURLToPath(new URL('../goal.cordis.snapshot.yml', import.meta.url))
 const retryScenarioDir = join(snapshotsDir, 'provider-retry')
 const retryConfigPath = fileURLToPath(new URL('../retry.cordis.snapshot.yml', import.meta.url))
+const credentialsScenarioDir = join(snapshotsDir, 'missing-credential')
+const credentialsConfigPath = fileURLToPath(new URL('../credentials.cordis.snapshot.yml', import.meta.url))
 const ralphScenarioDir = join(snapshotsDir, 'ralph-loop')
 const ralphConfigPath = fileURLToPath(new URL('../ralph.cordis.snapshot.yml', import.meta.url))
+const startupFailureConfigPath = fileURLToPath(new URL('./fixtures/startup-activation-error/cordis.yml', import.meta.url))
+const startupFailureExpected = join(snapshotsDir, 'startup-activation-error', 'stderr.expected.txt')
 const binScript = fileURLToPath(new URL('../../../packages/examples/cli-demo/src/bin.ts', import.meta.url))
 const tsconfigPath = fileURLToPath(new URL('../../../tsconfig.json', import.meta.url))
 const reasoningConfigPath = fileURLToPath(new URL('./fixtures/cli.cordis.yml', import.meta.url))
+const deepseekDefaultsConfigPath = fileURLToPath(new URL('./fixtures/deepseek-defaults.cordis.yml', import.meta.url))
 const refreshing = process.env.DSH_SNAPSHOT === 'refresh'

 interface JsonObject {
@@ -43,6 +50,40 @@ interface PersistedLog {
  readonly header: JsonObject
 }

+interface DeepSeekDefaultsServer {
+  readonly url: string
+  readonly requests: JsonObject[]
+  close(): Promise<void>
+}
+
+/** Serve one deterministic DeepSeek-compatible response while retaining its request body. */
+async function deepseekDefaultsServer(): Promise<DeepSeekDefaultsServer> {
+  const requests: JsonObject[] = []
+  const server = createServer((request: IncomingMessage, response: ServerResponse) => {
+    let body = ''
+    request.setEncoding('utf8')
+    request.on('data', (chunk: string) => { body += chunk })
+    request.on('end', () => {
+      requests.push(JSON.parse(body) as JsonObject)
+      response.writeHead(200, { 'content-type': 'text/event-stream' })
+      response.end([
+        'data: {"choices":[{"delta":{"content":"DEFAULTS_OK"}}]}',
+        'data: {"choices":[{"delta":{},"finish_reason":"stop"}],"usage":{"prompt_tokens":3,"completion_tokens":1}}',
+        'data: [DONE]',
+        '',
+      ].join('\n\n'))
+    })
+  })
+  await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve))
+  const address = server.address()
+  if (address === null || typeof address === 'string') throw new Error('DeepSeek defaults snapshot server has no port')
+  return {
+    url: `http://127.0.0.1:${address.port}`,
+    requests,
+    close: () => new Promise(resolve => server.close(() => { resolve() })),
+  }
+}
+
 function parseJsonl(content: string): JsonObject[] {
  return content.split('\n')
    .filter(line => line.trim().length > 0)
@@ -128,6 +169,20 @@ async function persistedLogs(cwd: string): Promise<PersistedLog[]> {
 }

 describe('headless stream-json snapshots', () => {
+  it('prints the original Loader activation error through the assembled one-shot app', async () => {
+    const result = await runLoaderSmoke({
+      label: 'headless startup activation error snapshot',
+      tempDirPrefix: 'headless-snapshot-startup-error-',
+      binScript,
+      configPath: startupFailureConfigPath,
+      binArgs: ['--config', startupFailureConfigPath, '--output-format', 'stream-json', 'unreachable task'],
+      tsconfigPath,
+      expectedExitCode: 1,
+    })
+    expect(result.stdout).toBe('')
+    await expect(result.stderr).toMatchFileSnapshot(startupFailureExpected)
+  }, LOADER_SMOKE_TEST_TIMEOUT_MS)
+
  it('retries a transient provider failure through the one-shot app', async () => {
    const prompt = await scenarioPrompt(retryScenarioDir, 'provider-retry')
    const streamExpected = join(retryScenarioDir, 'stream-json.expected.jsonl')
@@ -151,7 +206,7 @@ describe('headless stream-json snapshots', () => {
        const retries = records.filter(record => record.type === 'llm/retry')
        expect(retries).toHaveLength(1)
        expect(retries[0]?.data).toMatchObject({
-          provider: 'deepseek',
+          provider: 'deepseek-official',
          mode: 'normal',
          policyKey: '["normal",1,["RATE_LIMIT"],1,1,0]',
          retry: 1,
@@ -168,6 +223,37 @@ describe('headless stream-json snapshots', () => {
    expect(normalized).toBe(await readFile(streamExpected, 'utf8'))
  }, LOADER_SMOKE_TEST_TIMEOUT_MS)

+  it('logs actionable missing-credential guidance through the one-shot app', async () => {
+    const streamExpected = join(credentialsScenarioDir, 'stream-json.expected.jsonl')
+    let runCwd = ''
+    const result = await runLoaderSmoke({
+      label: 'missing-credential headless stream-json snapshot',
+      tempDirPrefix: 'headless-snapshot-missing-credential-',
+      binScript,
+      configPath: credentialsConfigPath,
+      binArgs: ['--config', credentialsConfigPath, '--output-format', 'stream-json', 'say pong'],
+      tsconfigPath,
+      env: {
+        // First-run posture: no key in the environment, none under ./.dsh.
+        DEEPSEEK_API_KEY: '',
+        DEEPSEEK_BASE_URL: '',
+        NODE_OPTIONS: [process.env.NODE_OPTIONS, '--disable-warning=ExperimentalWarning'].filter(Boolean).join(' '),
+      },
+      prepare: (cwd) => { runCwd = cwd },
+    })
+
+    expect(result.stderr).toBe('')
+    const normalized = normalizeHeadlessStream(result.stdout, runCwd)
+    if (refreshing) await writeFile(streamExpected, normalized)
+    expect(normalized).toBe(await readFile(streamExpected, 'utf8'))
+    // The durable failure leads with the credential store — the path that
+    // keeps the secret out of configuration files — and offers a literal key last.
+    expect(normalized).toContain(
+      'store DEEPSEEK_API_KEY through the credentials service (the web Models page writes it),',
+    )
+    expect(normalized).toContain('as a last resort')
+  }, LOADER_SMOKE_TEST_TIMEOUT_MS)
+
  it('logs the model default and a dynamic next-step reasoning effort', async () => {
    const result = await runLoaderSmoke({
      label: 'reasoning effort headless stream-json snapshot',
@@ -208,6 +294,57 @@ describe('headless stream-json snapshots', () => {
    `)
  }, LOADER_SMOKE_TEST_TIMEOUT_MS)

+  it('logs and sends the DeepSeek adapter maxTokens default through the one-shot app', async () => {
+    const server = await deepseekDefaultsServer()
+    try {
+      const result = await runLoaderSmoke({
+        label: 'DeepSeek adapter defaults headless stream-json snapshot',
+        tempDirPrefix: 'headless-snapshot-deepseek-defaults-',
+        binScript,
+        configPath: deepseekDefaultsConfigPath,
+        binArgs: [
+          '--config',
+          deepseekDefaultsConfigPath,
+          '--output-format',
+          'stream-json',
+          'return the deterministic response',
+        ],
+        tsconfigPath,
+        env: {
+          DSH_SNAPSHOT_BASE_URL: server.url,
+          NODE_OPTIONS: [process.env.NODE_OPTIONS, '--disable-warning=ExperimentalWarning'].filter(Boolean).join(' '),
+        },
+      })
+
+      expect(result.stderr).toBe('')
+      expect(server.requests).toHaveLength(1)
+      expect(server.requests[0]?.max_tokens).toBe(256_000)
+      const header = (parseJsonl(result.stdout)
+        .map(record => record.event)
+        .find((event): event is JsonObject => (
+          event !== null
+          && typeof event === 'object'
+          && !Array.isArray(event)
+          && 'type' in event
+          && event.type === 'request/header'
+        ))?.data as JsonObject | undefined)?.header as JsonObject | undefined
+      expect(header?.config).toMatchInlineSnapshot(`
+        {
+          "maxTokens": 256000,
+          "model": "deepseek-v4-flash",
+          "provider": "deepseek-official",
+          "reasoningEffort": "off",
+        }
+      `)
+      expect(header?.adapterDefaults).toEqual({
+        maxTokens: true,
+        reasoningEffort: true,
+      })
+    } finally {
+      await server.close()
+    }
+  }, LOADER_SMOKE_TEST_TIMEOUT_MS)
+
  it('replays the advanced toolchain through the one-shot app', async () => {
    const prompt = await scenarioPrompt(advancedScenarioDir, 'advanced-toolchain')
    const fixtureFiles = [
@@ -321,19 +458,11 @@ describe('headless stream-json snapshots', () => {
        const probeContent = probeMessage?.content as JsonObject[] | undefined
        expect(probeContent?.[0]?.isError).toBe(true)
        expect((probeData?.error as JsonObject | undefined)?.code).toBe('GOAL_NOT_FOUND')
-        const goalChanges = records.filter((record) => {
-          if (record.type !== 'user/message') return false
-          const data = record.data as JsonObject | undefined
-          const source = data?.source as JsonObject | undefined
-          const change = source?.change as JsonObject | undefined
-          return source?.kind === 'goal' && change?.kind === 'goal/change'
-        })
+        const goalChanges = records.filter(record => record.type === 'goal/change')
        expect(goalChanges).toHaveLength(1)
        const data = goalChanges[0]?.data as JsonObject | undefined
-        const source = data?.source as JsonObject | undefined
-        const change = source?.change as JsonObject | undefined
-        const goal = change?.goal as JsonObject | undefined
-        expect(change?.operation).toBe('create')
+        const goal = data?.goal as JsonObject | undefined
+        expect(data?.operation).toBe('create')
        expect(goal).toMatchObject({
          objective: 'Finish the headless goal-tool snapshot proof',
          phase: 'active',
--- a/examples/headless-agent/tests/keyless-smoke.e2e.ts
+++ b/examples/headless-agent/tests/keyless-smoke.e2e.ts
@@ -1,10 +1,12 @@
-import { readFile, readdir } from 'node:fs/promises'
+import { cp, mkdir, mkdtemp, readFile, readdir, rm, writeFile } from 'node:fs/promises'
+import { tmpdir } from 'node:os'
 import { zstdDecompress } from 'node:zlib'
 import { promisify } from 'node:util'
 import { join } from 'node:path'
 import { fileURLToPath } from 'node:url'
 import { describe, expect, it } from 'vitest'
 import { LOADER_SMOKE_TEST_TIMEOUT_MS, runLoaderSmoke } from '@deepseek-ai/dsh-loader-smoke'
+import { PREPARED_ENTRY_FILENAME, prepareDshPlugin } from '@deepseek-ai/dsh-repository-plugin'
 import type { SessionEvent } from '@deepseek-ai/dsh-session'

 const binScript = fileURLToPath(new URL('../../../packages/examples/cli-demo/src/bin.ts', import.meta.url))
@@ -36,16 +38,48 @@ describe('headless-agent keyless smoke', () => {
    const result = lines.at(-1)
    expect(stderr).toBe('')
    expect(events.some(event => event.type === 'tool/call' && event.data.name === 'bash')).toBe(true)
+    const catalogMessage = events.find(event => event.type === 'user/message'
+      && event.data.source.kind === 'plugin'
+      && event.data.source.plugin === 'dsh-tool-skill')
+    const catalog = catalogMessage?.type === 'user/message'
+      ? catalogMessage.data.content.filter(block => block.type === 'text').map(block => block.text).join('\n')
+      : ''
+    expect(catalog.split('\n').find(line => line.includes('repository-fixture'))).toMatchInlineSnapshot(
+      `
+        "- \`repository-fixture\`: Repository fixture skill."
+      `,
+    )
    const toolResult = events.find(event => event.type === 'tool/result')
    expect(JSON.stringify(toolResult)).toContain('CLI_TOOL_ROUND_TRIP')
    expect(result).toMatchObject({
      type: 'result',
-      success: true,
-      turn: 1,
-      reason: { kind: 'completed' },
      usage: { inputTokens: 18, outputTokens: 8, cacheReadTokens: 2, reasoningTokens: 1 },
    })
-    expect(String(result?.['result'])).toContain('CLI_TOOL_ROUND_TRIP')
+    expect(String(result?.['output'])).toContain('CLI_TOOL_ROUND_TRIP')
    expect(persistedHeader).toMatchObject({ type: 'session' })
  }, LOADER_SMOKE_TEST_TIMEOUT_MS)
+
+  it('keeps the checked-in prepared wrapper identical to the generator output for its manifest', async () => {
+    // The fixture claims "Generated by dsh-plugin-prepare"; this pin makes the
+    // claim true — a wrapper-template change fails here until the fixture is
+    // regenerated, so the assembled smoke can never exercise a stale shape.
+    const fixture = fileURLToPath(new URL('./fixtures/repository-plugin/', import.meta.url))
+    const root = await mkdtemp(join(tmpdir(), 'dsh-fixture-drift-'))
+    try {
+      const plugin = join(root, '.dsh-plugin')
+      await mkdir(plugin, { recursive: true })
+      await cp(join(fixture, 'dsh-plugin-assets/skills/0'), join(root, 'skills'), { recursive: true })
+      await writeFile(join(plugin, 'package.json'), `${JSON.stringify({
+        name: 'headless-repository-fixture',
+        version: '0.0.0',
+        dsh: { skills: ['../skills'] },
+      }, undefined, 2)}\n`)
+      await prepareDshPlugin(plugin)
+      const generated = await readFile(join(plugin, PREPARED_ENTRY_FILENAME), 'utf8')
+      const checkedIn = await readFile(join(fixture, PREPARED_ENTRY_FILENAME), 'utf8')
+      expect(checkedIn).toBe(generated)
+    } finally {
+      await rm(root, { recursive: true, force: true })
+    }
+  })
 })
--- a/examples/headless-agent/tests/resume.e2e.ts
+++ b/examples/headless-agent/tests/resume.e2e.ts
@@ -40,7 +40,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('resume: continue a persisted ses
    ctx = await codingHarness(process.cwd(), { persona: SYSTEM_PROMPT, persistenceRoot: root })
    const first = (await ctx.agents.create({
      sessionId: SESSION_ID,
-      agentOptions: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+      agentOptions: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
    })).agent
    first.followup(createUserMessage({ content: [{ type: 'text', text: `Remember this code for later: ${SECRET}. Just acknowledge it.` }], source: { kind: 'user' } }))
    await waitForIdle(ctx, first)
@@ -53,7 +53,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('resume: continue a persisted ses
    ctx = await codingHarness(process.cwd(), { persona: SYSTEM_PROMPT, persistenceRoot: root })
    const resumed = (await ctx.agents.resume({
      resumeSessionId: SESSION_ID,
-      agentOptions: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+      agentOptions: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
    })).agent
    expect(resumed.session.id).toBe(SESSION_ID)
    // The prior user turn is in the rehydrated log before the model is asked.
--- a/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
+++ b/examples/headless-agent/tests/semantic-checkpoint-snapshots/tool-outcome-unknown/session.expected.jsonl
@@ -1,21 +1,25 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
+{"type":"turn/start","seq":0,"time":0,"data":{"turn":1}}
 {"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Perform one side-effecting remote mutation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"step/start","seq":2,"time":0,"data":{"turn":1,"step":1}}
-{"type":"assistant/message","seq":3,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"unknown-outcome-call","name":"write_remote","arguments":"{\"value\":1}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"surfaceOp":"append"}
+{"type":"assistant/message","seq":3,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"unknown-outcome-call","name":"write_remote","arguments":"{\"value\":1}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"surfaceOp":"append"}
 {"type":"tool/call","seq":4,"time":0,"data":{"turn":1,"step":1,"callId":"unknown-outcome-call","name":"write_remote","arguments":"{\"value\":1}"}}
 {"type":"tool/result","seq":5,"time":0,"data":{"turn":1,"step":1,"message":{"id":"interrupted-tool-result-unknown-outcome-call-5","role":"user","source":{"kind":"tool","callId":"unknown-outcome-call"},"content":[{"type":"tool-result","toolCallId":"unknown-outcome-call","isError":true,"content":[{"type":"text","text":"The tool call was interrupted after it was recorded, but no result was durably recorded. Its outcome is unknown. Decide whether to retry from the tool semantics: retry only if the operation is read-only or idempotent; if it may have side effects, first verify external state or ask the user. Do not retry blindly."}]}]},"error":{"name":"ToolOutcomeUnknownError","code":"TOOL_OUTCOME_UNKNOWN"}},"surfaceOp":"append","sourceEventSeqs":[4]}
 {"type":"step/end","seq":6,"time":0,"data":{"turn":1,"step":1}}
 {"type":"turn/end","seq":7,"time":0,"data":{"turn":1,"reason":{"kind":"interrupted"}}}
-{"type":"turn/start","seq":8,"time":0,"data":{"turn":2,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"user/message","seq":9,"time":0,"data":{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":10,"time":0,"data":{"title":"Perform one side-effecting remote mutati","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":11,"time":0,"data":{"turn":2,"step":1}}
-{"type":"request/header","seq":12,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}
-{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":17,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[13,14,15,16],"surfaceOp":"append"}
-{"type":"step/end","seq":18,"time":0,"data":{"turn":2,"step":1}}
-{"type":"turn/end","seq":19,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"session/end-seed","seq":8,"time":0,"data":{}}
+{"type":"agent/inbox/spliced","seq":9,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","seq":10,"time":0,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":11,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","seq":12,"time":0,"data":{"turn":2,"step":1}}
+{"type":"user/message","seq":13,"time":0,"data":{"content":[{"type":"text","text":"Continue safely from the interrupted operation."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","seq":14,"time":0,"data":{"title":"Perform one side-effecting remote mutati","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"request/header","seq":15,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","seq":16,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"text-delta","index":0,"text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}
+{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}}}}
+{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":21,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"text","text":"I will verify the external state before deciding whether to retry the side-effecting operation."}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"}},"sourceEventSeqs":[17,18,19,20],"surfaceOp":"append"}
+{"type":"step/end","seq":22,"time":0,"data":{"turn":2,"step":1}}
+{"type":"turn/end","seq":23,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
--- a/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts
+++ b/examples/headless-agent/tests/semantic-checkpoint.snapshot.ts
@@ -32,7 +32,7 @@ async function seedInterruptedSession(root: string, cwd: string): Promise<string
    delegationDepth: 0,
  }
  const events: SessionEvent[] = [
-    { type: 'turn/start', seq: 0, time: 10, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
+    { type: 'turn/start', seq: 0, time: 10, data: { turn: 1 } },
    { type: 'user/message', seq: 1, time: 11, data: createUserMessage({
      content: [{ type: 'text', text: 'Perform one side-effecting remote mutation.' }], source: { kind: 'user' },
    }), surfaceOp: 'append' },
@@ -49,7 +49,7 @@ async function seedInterruptedSession(root: string, cwd: string): Promise<string
          content: [{ type: 'tool-call', id: CallId('unknown-outcome-call'), name: 'write_remote', arguments: '{"value":1}' }],
          source: {
            kind: 'model',
-            ...{ provider: 'deepseek', model: 'deepseek-v4-flash' },
+            ...{ provider: 'deepseek-official', model: 'deepseek-v4-flash' },
          },
        }),
      },
@@ -112,10 +112,8 @@ describe('semantic checkpoint recovery snapshot', () => {
    const records = result.stdout.trimEnd().split('\n').map(line => JSON.parse(line) as Record<string, unknown>)
    expect(records.at(-1)).toMatchObject({
      type: 'result',
-      success: true,
      sessionId,
-      result: 'I will verify the external state before deciding whether to retry the side-effecting operation.',
-      reason: { kind: 'completed' },
+      output: 'I will verify the external state before deciding whether to retry the side-effecting operation.',
    })
  }, LOADER_SMOKE_TEST_TIMEOUT_MS)
 })
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.1.jsonl
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.2.jsonl
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/session.jsonl
--- a/examples/headless-agent/tests/snapshots/advanced-toolchain/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/advanced-toolchain/stream-json.expected.jsonl
@@ -1,66 +1,69 @@
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":0,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":2,"time":0,"data":{"title":"Run this advanced flow exactly","messageSeqs":[1],"source":{"kind":"fallback"}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":0,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/start","seq":1,"time":0,"data":{"turn":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"agent/inbox/spliced","seq":2,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}}
 {"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":3,"time":0,"data":{"turn":1,"step":1}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"request/header","seq":4,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":5,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":6,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-mount","name":"cordis_mount","argumentsDelta":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":7,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":10,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[5,6,7,8,9],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/call","seq":11,"time":0,"data":{"turn":1,"step":1,"callId":"advanced-mount","name":"cordis_mount","arguments":"{\"code\":\"return { name: 'snapshot-marker', apply() {} }\"}"}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/result","seq":12,"time":0,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"advanced-mount"},"content":[{"type":"tool-result","toolCallId":"advanced-mount","content":[{"type":"text","text":"Temporary Plugin dyn-1 is running (plugin \"snapshot-marker\"; available until unmounted or DSH restarts)."}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[11],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":13,"time":0,"data":{"turn":1,"step":1}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":14,"time":0,"data":{"turn":1,"step":2}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-code","name":"run_code","argumentsDelta":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":20,"time":0,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[15,16,17,18,19],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/call","seq":21,"time":0,"data":{"turn":1,"step":2,"callId":"advanced-code","name":"run_code","arguments":"{\"code\": \"return await tools.cordis_inspect({ what: 'temporary' })\", \"description\": \"Run the scripted inspection program\"}"}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/code-dispatch-start","seq":22,"time":0,"data":{"parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_inspect","arguments":{"what":"temporary"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/code-dispatch","seq":23,"time":0,"data":{"parentCallId":"advanced-code","subCallId":"advanced-code:code:1","name":"cordis_inspect","arguments":{"what":"temporary"},"isError":false,"content":[{"type":"text","text":"## Temporary Plugins\n- Temporary Plugin dyn-1: snapshot-marker [running] — provides: none; waiting for: none; lifetime: until unmounted or DSH restarts"}]}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/result","seq":24,"time":0,"data":{"turn":1,"step":2,"message":{"source":{"kind":"tool","callId":"advanced-code"},"content":[{"type":"tool-result","toolCallId":"advanced-code","content":[{"type":"text","text":"## Temporary Plugins\n- Temporary Plugin dyn-1: snapshot-marker [running] — provides: none; waiting for: none; lifetime: until unmounted or DSH restarts"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[21],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":25,"time":0,"data":{"turn":1,"step":2}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":26,"time":0,"data":{"turn":1,"step":3}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":27,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":28,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-direct-child","name":"subagent","argumentsDelta":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":29,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":30,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":31,"time":0,"data":{"turn":1,"step":3,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":32,"time":0,"data":{"turn":1,"step":3,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[27,28,29,30,31],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/call","seq":33,"time":0,"data":{"turn":1,"step":3,"callId":"advanced-direct-child","name":"subagent","arguments":"{\"description\":\"Check direct child\",\"prompt\":\"Reply with exactly DIRECT_CHILD_OK and nothing else.\"}"}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/result","seq":34,"time":0,"data":{"turn":1,"step":3,"message":{"source":{"kind":"tool","callId":"advanced-direct-child"},"content":[{"type":"tool-result","toolCallId":"advanced-direct-child","content":[{"type":"text","text":"DIRECT_CHILD_OK"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[33],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":35,"time":0,"data":{"turn":1,"step":3}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":36,"time":0,"data":{"turn":1,"step":4}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":37,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":38,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-workflow","name":"workflow","argumentsDelta":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":39,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":40,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":41,"time":0,"data":{"turn":1,"step":4,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":42,"time":0,"data":{"turn":1,"step":4,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[37,38,39,40,41],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/call","seq":43,"time":0,"data":{"turn":1,"step":4,"callId":"advanced-workflow","name":"workflow","arguments":"{\"script\":\"phase('Delegate')\\nconst reply = await agent('Reply with exactly WORKFLOW_CHILD_OK and nothing else.', { label: 'workflow-child' })\\nreturn { reply }\",\"meta\":{\"name\":\"advanced-headless-snapshot\",\"description\":\"exercise one workflow child through the headless agent\"}}"}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/result","seq":44,"time":0,"data":{"turn":1,"step":4,"message":{"source":{"kind":"tool","callId":"advanced-workflow"},"content":[{"type":"tool-result","toolCallId":"advanced-workflow","content":[{"type":"text","text":"workflow \"advanced-headless-snapshot\" completed (1 agent).\nReturn value:\n{\n  \"reply\": \"WORKFLOW_CHILD_OK\"\n}"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[43],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":45,"time":0,"data":{"turn":1,"step":4}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":46,"time":0,"data":{"turn":1,"step":5}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":47,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":48,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"tool-call-delta","index":0,"id":"advanced-unmount","name":"cordis_unmount","argumentsDelta":"{\"id\":\"dyn-1\"}"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":49,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":50,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":51,"time":0,"data":{"turn":1,"step":5,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":52,"time":0,"data":{"turn":1,"step":5,"message":{"role":"assistant","content":[{"type":"tool-call","id":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[47,48,49,50,51],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/call","seq":53,"time":0,"data":{"turn":1,"step":5,"callId":"advanced-unmount","name":"cordis_unmount","arguments":"{\"id\":\"dyn-1\"}"}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/result","seq":54,"time":0,"data":{"turn":1,"step":5,"message":{"source":{"kind":"tool","callId":"advanced-unmount"},"content":[{"type":"tool-result","toolCallId":"advanced-unmount","content":[{"type":"text","text":"Temporary Plugin dyn-1 was unmounted and removed."}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[53],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":55,"time":0,"data":{"turn":1,"step":5}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":56,"time":0,"data":{"turn":1,"step":6}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":57,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":58,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"text-delta","index":0,"text":"ADVANCED_HEADLESS_OK"}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":59,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"ADVANCED_HEADLESS_OK"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":60,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"usage","usage":{"inputTokens":3,"outputTokens":3}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":61,"time":0,"data":{"turn":1,"step":6,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":62,"time":0,"data":{"turn":1,"step":6,"message":{"role":"assistant","content":[{"type":"text","text":"ADVANCED_HEADLESS_OK"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":3,"outputTokens":3}},"sourceEventSeqs":[57,58,59,60,61],"surfaceOp":"append"}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":63,"time":0,"data":{"turn":1,"step":6}}}
-{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/end","seq":64,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}}
-{"type":"result","success":true,"sessionId":"{{sessionId}}","turn":1,"result":"ADVANCED_HEADLESS_OK","reason":{"kind":"completed"},"usage":{"inputTokens":18,"outputTokens":18}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Run this advanced flow exactly once: try a no-op temporary Cordis Plugin named snapshot-marker; use run_code to inspect the live temporary Plugins through tools.cordis_inspect; delegate once to a direct spawn child; run one workflow that delegates to another spawn child; stop dyn-1; then reply with exactly ADVANCED_HEADLESS_OK."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"Run this advanced flow exactly","messageSeqs":[4],"source":{"kind":"fallback"}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"request/header","seq":6,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}}
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+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}}
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--- a/examples/headless-agent/tests/snapshots/goal-tools/stream-json.expected.jsonl
+++ b/examples/headless-agent/tests/snapshots/goal-tools/stream-json.expected.jsonl
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--- a/examples/headless-agent/tests/snapshots/missing-credential/stream-json.expected.jsonl
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--- a/examples/headless-agent/tests/snapshots/provider-retry/stream-json.expected.jsonl
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+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"user/message","seq":4,"time":0,"data":{"content":[{"type":"text","text":"Run a two-round fresh-agent Ralph loop to prove the shipped headless integration."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"session/title","seq":5,"time":0,"data":{"title":"Run a two-round fresh-agent Ralph","messageSeqs":[4],"source":{"kind":"fallback"}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"request/header","seq":6,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"request/context","seq":7,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"call_ralph","name":"ralph","argumentsDelta":"{\"objective\":\"Prove two fresh Ralph rounds through the shipped headless app.\",\"maxRounds\":2}"}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"call_ralph","name":"ralph","arguments":"{\"objective\":\"Prove two fresh Ralph rounds through the shipped headless app.\",\"maxRounds\":2}"}}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":20,"outputTokens":8}}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":13,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"call_ralph","name":"ralph","arguments":"{\"objective\":\"Prove two fresh Ralph rounds through the shipped headless app.\",\"maxRounds\":2}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":20,"outputTokens":8}},"sourceEventSeqs":[8,9,10,11,12],"surfaceOp":"append"}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/call","seq":14,"time":0,"data":{"turn":1,"step":1,"callId":"call_ralph","name":"ralph","arguments":"{\"objective\":\"Prove two fresh Ralph rounds through the shipped headless app.\",\"maxRounds\":2}"}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"tool/result","seq":15,"time":0,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"call_ralph"},"content":[{"type":"tool-result","toolCallId":"call_ralph","content":[{"type":"text","text":"Ralph worker reported completion after 2 rounds.\nFinal report:\n{\n  \"status\": \"complete\",\n  \"summary\": \"The Ralph snapshot objective is complete.\",\n  \"evidence\": [\n    \"Two fresh rounds completed through the shipped app.\"\n  ],\n  \"nextSteps\": [],\n  \"blocker\": \"\"\n}"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[14],"surfaceOp":"append"}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":16,"time":0,"data":{"turn":1,"step":1}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/start","seq":17,"time":0,"data":{"turn":1,"step":2}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"RALPH SNAPSHOT COMPLETE"}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"RALPH SNAPSHOT COMPLETE"}}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":21,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":30,"outputTokens":4}}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/chunk","seq":22,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"assistant/message","seq":23,"time":0,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"RALPH SNAPSHOT COMPLETE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":30,"outputTokens":4}},"sourceEventSeqs":[18,19,20,21,22],"surfaceOp":"append"}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"step/end","seq":24,"time":0,"data":{"turn":1,"step":2}}}
+{"type":"session_event","sessionId":"{{sessionId}}","event":{"type":"turn/end","seq":25,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}}
+{"type":"result","sessionId":"{{sessionId}}","output":"RALPH SNAPSHOT COMPLETE","usage":{"inputTokens":50,"outputTokens":12}}
--- a/examples/headless-agent/tests/snapshots/startup-activation-error/stderr.expected.txt
+++ b/examples/headless-agent/tests/snapshots/startup-activation-error/stderr.expected.txt
@@ -0,0 +1,3 @@
+dsh-cli-demo: dsh-cli-demo: plugin tree failed to load: failed to apply loader entry include (cordis:include): failed to apply loader entry activation-error (./activation-error.mjs): startup activation snapshot failure
+Error: startup activation snapshot failure
+    at activation-error-fixture
--- a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
+++ b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/child.expected.jsonl
@@ -1,25 +1,30 @@
-{"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","parentSession":"{{sessionId}}","delegationDepth":1}
+{"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","parentSession":"{{sessionId}}","origin":"subagent","delegationDepth":1}
 {"type":"sandbox/mode","seq":0,"time":0,"data":{"mode":"read-only","source":"delegation"}}
-{"type":"turn/start","seq":1,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"user/message","seq":2,"time":0,"data":{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":3,"time":0,"data":{"title":"Use the write tool exactly","messageSeqs":[2],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":4,"time":0,"data":{"turn":1,"step":1}}
-{"type":"request/header","seq":5,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"assistant/chunk","seq":6,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":7,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"child-write","name":"write","argumentsDelta":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}
-{"type":"assistant/chunk","seq":8,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}}
-{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":11,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[6,7,8,9,10],"surfaceOp":"append"}
-{"type":"tool/call","seq":12,"time":0,"data":{"turn":1,"step":1,"callId":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}
-{"type":"tool/result","seq":13,"time":0,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"child-write"},"content":[{"type":"tool-result","toolCallId":"child-write","content":[{"type":"text","text":"Error: [sandbox: file access denied under read-only mode]\n[sandbox: escalation available — retry this exact operation once with sandbox_permissions (the narrowest wider mode that suffices) + justification; the approval prompt asks the user]"}],"isError":true}],"role":"user","id":"{{sessionId}}"},"error":{"name":"FsError","code":"FS_SANDBOX_DENIED"}},"sourceEventSeqs":[12],"surfaceOp":"append"}
-{"type":"step/end","seq":14,"time":0,"data":{"turn":1,"step":1}}
-{"type":"step/start","seq":15,"time":0,"data":{"turn":1,"step":2}}
-{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}
-{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}}
-{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":21,"time":0,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[16,17,18,19,20],"surfaceOp":"append"}
-{"type":"step/end","seq":22,"time":0,"data":{"turn":1,"step":2}}
-{"type":"turn/end","seq":23,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
+{"type":"agent/inbox/spliced","seq":1,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","seq":2,"time":0,"data":{"turn":1}}
+{"type":"agent/inbox/spliced","seq":3,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"subagent/descriptor","seq":4,"time":0,"data":{"version":2,"mode":"one-shot","provider":"spawn","label":"Delegated write probe"}}
+{"type":"step/start","seq":5,"time":0,"data":{"turn":1,"step":1}}
+{"type":"user/message","seq":6,"time":0,"data":{"content":[{"type":"text","text":"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","seq":7,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","seq":8,"time":0,"data":{"title":"Use the write tool exactly","messageSeqs":[6],"source":{"kind":"fallback"}}}
+{"type":"request/header","seq":9,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","seq":10,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"child-write","name":"write","argumentsDelta":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}
+{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}}}
+{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":1,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":16,"time":0,"data":{"turn":1,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[11,12,13,14,15],"surfaceOp":"append"}
+{"type":"tool/call","seq":17,"time":0,"data":{"turn":1,"step":1,"callId":"child-write","name":"write","arguments":"{\"file_path\": \"inherited.txt\", \"content\": \"escaped\"}"}}
+{"type":"tool/result","seq":18,"time":0,"data":{"turn":1,"step":1,"message":{"source":{"kind":"tool","callId":"child-write"},"content":[{"type":"tool-result","toolCallId":"child-write","content":[{"type":"text","text":"Error: [sandbox: file access denied under read-only mode]\n[sandbox: escalation available — retry this exact operation once with sandbox_permissions (the narrowest wider mode that suffices) + justification; the approval prompt asks the user]"}],"isError":true}],"role":"user","id":"{{sessionId}}"},"error":{"name":"FsError","code":"FS_SANDBOX_DENIED"}},"sourceEventSeqs":[17],"surfaceOp":"append"}
+{"type":"step/end","seq":19,"time":0,"data":{"turn":1,"step":1}}
+{"type":"step/start","seq":20,"time":0,"data":{"turn":1,"step":2}}
+{"type":"assistant/chunk","seq":21,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","seq":22,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"text-delta","index":0,"text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}
+{"type":"assistant/chunk","seq":23,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}}}}
+{"type":"assistant/chunk","seq":24,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":25,"time":0,"data":{"turn":1,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":26,"time":0,"data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[21,22,23,24,25],"surfaceOp":"append"}
+{"type":"step/end","seq":27,"time":0,"data":{"turn":1,"step":2}}
+{"type":"turn/end","seq":28,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
--- a/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
+++ b/examples/headless-agent/tests/subagent-inheritance-snapshots/parent-override/parent.expected.jsonl
@@ -1,28 +1,33 @@
 {"type":"session","version":0,"id":"{{sessionId}}","createdAt":0,"cwd":"{{cwd}}","delegationDepth":0}
-{"type":"turn/start","seq":0,"time":0,"data":{"turn":1,"trigger":{"kind":"message","source":{"kind":"user"}}}}
+{"type":"turn/start","seq":0,"time":0,"data":{"turn":1}}
 {"type":"user/message","seq":1,"time":0,"data":{"content":[{"type":"text","text":"Tighten this session to read-only."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
 {"type":"sandbox/mode","seq":2,"time":0,"data":{"mode":"read-only"}}
 {"type":"turn/end","seq":3,"time":0,"data":{"turn":1,"reason":{"kind":"completed"}}}
-{"type":"turn/start","seq":4,"time":0,"data":{"turn":2,"trigger":{"kind":"message","source":{"kind":"user"}}}}
-{"type":"user/message","seq":5,"time":0,"data":{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
-{"type":"session/title","seq":6,"time":0,"data":{"title":"Tighten this session to read-only.","messageSeqs":[1],"source":{"kind":"fallback"}}}
-{"type":"step/start","seq":7,"time":0,"data":{"turn":2,"step":1}}
-{"type":"request/header","seq":8,"time":0,"data":{"header":{"config":{"provider":"deepseek","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
-{"type":"assistant/chunk","seq":9,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
-{"type":"assistant/chunk","seq":10,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"delegate-write","name":"subagent","argumentsDelta":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}
-{"type":"assistant/chunk","seq":11,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}}
-{"type":"assistant/chunk","seq":12,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":13,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
-{"type":"assistant/message","seq":14,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[9,10,11,12,13],"surfaceOp":"append"}
-{"type":"tool/call","seq":15,"time":0,"data":{"turn":2,"step":1,"callId":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}
-{"type":"tool/result","seq":16,"time":0,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"delegate-write"},"content":[{"type":"tool-result","toolCallId":"delegate-write","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[15],"surfaceOp":"append"}
-{"type":"step/end","seq":17,"time":0,"data":{"turn":2,"step":1}}
-{"type":"step/start","seq":18,"time":0,"data":{"turn":2,"step":2}}
-{"type":"assistant/chunk","seq":19,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
-{"type":"assistant/chunk","seq":20,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}
-{"type":"assistant/chunk","seq":21,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}}
-{"type":"assistant/chunk","seq":22,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
-{"type":"assistant/chunk","seq":23,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
-{"type":"assistant/message","seq":24,"time":0,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[19,20,21,22,23],"surfaceOp":"append"}
-{"type":"step/end","seq":25,"time":0,"data":{"turn":2,"step":2}}
-{"type":"turn/end","seq":26,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
+{"type":"session/end-seed","seq":4,"time":0,"data":{}}
+{"type":"agent/inbox/spliced","seq":5,"time":0,"data":{"target":"next-turn","start":0,"inserted":[{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"}]}}
+{"type":"turn/start","seq":6,"time":0,"data":{"turn":2}}
+{"type":"agent/inbox/spliced","seq":7,"time":0,"data":{"target":"next-turn","start":0,"removedCount":1,"inserted":[]}}
+{"type":"step/start","seq":8,"time":0,"data":{"turn":2,"step":1}}
+{"type":"user/message","seq":9,"time":0,"data":{"content":[{"type":"text","text":"Delegate the write probe to a subagent."}],"source":{"kind":"user"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"user/message","seq":10,"time":0,"data":{"content":[{"type":"text","text":"Current runtime context. This snapshot supersedes earlier runtime-context snapshots.\n\nCurrent DSH file policy: read-only. Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode. Do not refuse a required modification from this policy alone: try an available tool normally and follow any denial and escalation guidance it returns."}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"role":"user","id":"{{sessionId}}"},"surfaceOp":"append"}
+{"type":"session/title","seq":11,"time":0,"data":{"title":"Tighten this session to read-only.","messageSeqs":[1],"source":{"kind":"fallback"}}}
+{"type":"request/header","seq":12,"time":0,"data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"system":"{{system}}","tools":"{{tools}}"},"reason":"initial"}}
+{"type":"request/context","seq":13,"time":0,"data":{"provider":"deepseek-official","model":"deepseek-v4-flash"}}
+{"type":"assistant/chunk","seq":14,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-start","index":0,"blockType":"tool-call"}}}
+{"type":"assistant/chunk","seq":15,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"tool-call-delta","index":0,"id":"delegate-write","name":"subagent","argumentsDelta":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}
+{"type":"assistant/chunk","seq":16,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"block-end","index":0,"block":{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}}}
+{"type":"assistant/chunk","seq":17,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":18,"time":0,"data":{"turn":2,"step":1,"chunk":{"type":"finish","reason":{"kind":"tool-calls"}}}}
+{"type":"assistant/message","seq":19,"time":0,"data":{"turn":2,"step":1,"message":{"role":"assistant","content":[{"type":"tool-call","id":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[14,15,16,17,18],"surfaceOp":"append"}
+{"type":"tool/call","seq":20,"time":0,"data":{"turn":2,"step":1,"callId":"delegate-write","name":"subagent","arguments":"{\"description\": \"Delegated write probe\", \"prompt\": \"Use the write tool exactly once with file_path set to exactly the relative path inherited.txt and content escaped. If the write is denied, reply with the single word CHILD_DENIED and the denial marker line; do not retry and do not request escalation. If it succeeds, reply CHILD_WROTE.\"}"}}
+{"type":"tool/result","seq":21,"time":0,"data":{"turn":2,"step":1,"message":{"source":{"kind":"tool","callId":"delegate-write"},"content":[{"type":"tool-result","toolCallId":"delegate-write","content":[{"type":"text","text":"CHILD_DENIED [sandbox: file access denied under read-only mode]"}],"isError":false}],"role":"user","id":"{{sessionId}}"}},"sourceEventSeqs":[20],"surfaceOp":"append"}
+{"type":"step/end","seq":22,"time":0,"data":{"turn":2,"step":1}}
+{"type":"step/start","seq":23,"time":0,"data":{"turn":2,"step":2}}
+{"type":"assistant/chunk","seq":24,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-start","index":0,"blockType":"text"}}}
+{"type":"assistant/chunk","seq":25,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"text-delta","index":0,"text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}
+{"type":"assistant/chunk","seq":26,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"block-end","index":0,"block":{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}}}}
+{"type":"assistant/chunk","seq":27,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"usage","usage":{"inputTokens":10,"outputTokens":5}}}}
+{"type":"assistant/chunk","seq":28,"time":0,"data":{"turn":2,"step":2,"chunk":{"type":"finish","reason":{"kind":"stop"}}}}
+{"type":"assistant/message","seq":29,"time":0,"data":{"turn":2,"step":2,"message":{"role":"assistant","content":[{"type":"text","text":"The delegated child was denied by the sandbox. PARENT_DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{sessionId}}"},"usage":{"inputTokens":10,"outputTokens":5}},"sourceEventSeqs":[24,25,26,27,28],"surfaceOp":"append"}
+{"type":"step/end","seq":30,"time":0,"data":{"turn":2,"step":2}}
+{"type":"turn/end","seq":31,"time":0,"data":{"turn":2,"reason":{"kind":"completed"}}}
--- a/examples/headless-agent/tests/subagent-inheritance.snapshot.ts
+++ b/examples/headless-agent/tests/subagent-inheritance.snapshot.ts
@@ -39,7 +39,7 @@ async function seedReadOnlyParent(root: string, cwd: string): Promise<void> {
    delegationDepth: 0,
  }
  const events: SessionEvent[] = [
-    { type: 'turn/start', seq: 0, time: 10, data: { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } } },
+    { type: 'turn/start', seq: 0, time: 10, data: { turn: 1 } },
    { type: 'user/message', seq: 1, time: 11, data: createUserMessage({ content: [{ type: 'text', text: 'Tighten this session to read-only.' }], source: { kind: 'user' } }), surfaceOp: 'append' },
    { type: 'sandbox/mode', seq: 2, time: 12, data: { mode: 'read-only' } },
    { type: 'turn/end', seq: 3, time: 13, data: { turn: 1, reason: { kind: 'completed' } } },
@@ -97,6 +97,26 @@ describe('parent-only override inheritance snapshot', () => {
          data: { mode: 'read-only', source: 'delegation' },
        })

+        const runtimeContexts = (content: string): string[] => content.trimEnd().split('\n').flatMap((line) => {
+          const record = JSON.parse(line) as {
+            type?: string
+            data?: { source?: { kind?: string; plugin?: string }; content?: Array<{ type?: string; text?: unknown }> }
+          }
+          if (record.type !== 'user/message'
+            || record.data?.source?.kind !== 'plugin'
+            || record.data.source.plugin !== '@deepseek-ai/dsh-system-prompt') return []
+          return record.data.content?.flatMap(block => block.type === 'text' && typeof block.text === 'string' ? [block.text] : []) ?? []
+        })
+        const policyContexts = [...runtimeContexts(parent), ...runtimeContexts(child)]
+        expect(policyContexts).toHaveLength(2)
+        for (const context of policyContexts) {
+          expect(context).toContain('Any available operation enforced by the DSH file sandbox cannot modify files in the standing mode.')
+          expect(context).toContain('Do not refuse a required modification from this policy alone')
+          expect(context).not.toContain('write and edit tools')
+          expect(context).not.toContain('one-shot bash commands')
+          expect(context).not.toContain('terminal sessions')
+        }
+
        const context: NormalizeContext = { sessionIds: [sessionId, String(headerOf(child).id)], cwd }
        const normalizedParent = scrubRequestHeaders(normalizeSessionLog(parent, context))
        const normalizedChild = scrubRequestHeaders(normalizeSessionLog(child, context))
@@ -115,10 +135,8 @@ describe('parent-only override inheritance snapshot', () => {
    const records = result.stdout.trimEnd().split('\n').map(line => JSON.parse(line) as Record<string, unknown>)
    expect(records.at(-1)).toMatchObject({
      type: 'result',
-      success: true,
      sessionId,
-      result: 'The delegated child was denied by the sandbox. PARENT_DONE',
-      reason: { kind: 'completed' },
+      output: 'The delegated child was denied by the sandbox. PARENT_DONE',
    })
  }, LOADER_SMOKE_TEST_TIMEOUT_MS)
 })
--- a/examples/headless-agent/tests/todo-write.e2e.ts
+++ b/examples/headless-agent/tests/todo-write.e2e.ts
@@ -27,7 +27,7 @@ describe.skipIf(!process.env.DEEPSEEK_API_KEY)('todo_write: real model records a
  it('appends a todo/write event with the model-produced task list', async () => {
    workdir = await mkdtemp(join(tmpdir(), 'dsh-todo-write-e2e-'))
    ctx = await codingHarness(workdir, { persona: TODO_SYSTEM_PROMPT })
-    const agent = ctx.agentLoop.create(SessionId('e2e-todo'), { provider: 'deepseek', model: 'deepseek-v4-flash' })
+    const agent = ctx.agentLoop.create(SessionId('e2e-todo'), { provider: 'deepseek-official', model: 'deepseek-v4-flash' })

    agent.followup(createUserMessage({
      content: [{ type: 'text', text: