Merge remote-tracking branch 'origin/master' into xtr/react-loop-simplification

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-25-web-client-session-scope-and-provide-channel.i18n.yaml
#	docs/architecture.i18n.yaml
#	docs/architecture.md
#	docs/architecture.zh.md
#	docs/cookbook/extension-cookbook.i18n.yaml
#	docs/cookbook/extension-cookbook.md
#	docs/cookbook/extension-cookbook.zh.md
#	docs/core-data-structures/llm-streaming.i18n.yaml
#	docs/core-data-structures/session.i18n.yaml
#	docs/defensive-patterns.i18n.yaml
#	packages/acp/acp/README.i18n.yaml
#	packages/client/runtime/README.i18n.yaml
#	packages/client/ui-conversation/README.i18n.yaml
#	packages/client/ui-goal/README.i18n.yaml
#	packages/compact/compact-basic/README.i18n.yaml
#	packages/context/README.i18n.yaml
#	packages/context/README.md
#	packages/context/README.zh.md
#	packages/context/session-reference/README.i18n.yaml
#	packages/context/session-reference/README.md
#	packages/context/session-reference/README.zh.md
#	packages/context/tmux-context/README.i18n.yaml
#	packages/core/session/README.i18n.yaml
#	packages/core/session/README.md
#	packages/core/session/README.zh.md
#	packages/goal/command-goal/README.i18n.yaml
#	packages/goal/goal-session/README.i18n.yaml
#	packages/goal/goal-session/README.zh.md
#	packages/guard/README.i18n.yaml
#	packages/guard/README.md
#	packages/guard/README.zh.md
#	packages/guard/repeat-tool-guard/README.i18n.yaml
#	packages/host/apiproxy/README.i18n.yaml
#	packages/host/apiproxy/README.md
#	packages/host/apiproxy/README.zh.md
#	packages/plan/plan-mode/README.i18n.yaml
#	packages/sdk/sdk-client/README.i18n.yaml
#	packages/sdk/sdk-client/README.md
#	packages/sdk/sdk-client/README.zh.md
#	packages/session-persistence/session-persistence/README.i18n.yaml
#	packages/subagent/subagent-dsh-sdk/README.i18n.yaml
#	python/sdk/README.i18n.yaml

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: f1cf1964bbe15bc2b15abcd78a12fc1ffe7ea767
+README.md: 670a91ab402cf98585f2ece70787beb3b4aaf4dc
+README.zh.md: 6c8b3b5694403c5e09f2904f5c3ca18fe569163e

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.

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。