fix(examples): isolate headless agent example

docs/cookbook/extension-cookbook.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
-extension-cookbook.md: 3474bc116b43f9be57b52e947f9cf99730f7e796
-extension-cookbook.zh.md: 1a605b20fe4e171a948ac2a046193a2f4d884e44
+extension-cookbook.md: 9d583a484fca89810bf1e7062fe9aab5b2a2da5e
+extension-cookbook.zh.md: afb6edee56be5aeec22957acb903a6ac3a869856

docs/cookbook/extension-cookbook.md

@@ -87,7 +87,7 @@ export function apply(ctx: Context) {
 
 ## Runnable wirings
 
-Three complete examples load their plugin trees from `cordis.yml`: [`examples/echo-agent`](../../examples/echo-agent) (mock model + echo tool — the all-mock skeleton check, `pnpm run demo:echo`), [`examples/coding-agent`](../../examples/coding-agent) (DeepSeek V4 + the bash tool suite behind a terminal REPL UI, `pnpm run demo:repl`), and [`examples/acp-agent`](../../examples/acp-agent) (an agent exposed as an ACP server over JSON-RPC stdio — the client-driver shape, `pnpm run demo:acp`). Each leaf is just its swappable backends plus an app-package entry: the stdio demos load [`@deepseek-ai/dsh-stdio-demo`](../../packages/examples/stdio-demo), the ACP demo loads [`@deepseek-ai/dsh-acp-demo`](../../packages/examples/acp-demo), and both app packages share the spine via the [`@deepseek-ai/dsh-agent-spine-demo`](../../packages/examples/agent-spine-demo) bundle.
+Five complete examples load their plugin trees from `cordis.yml`: [`examples/echo-agent`](../../examples/echo-agent) (mock model + echo tool — the all-mock skeleton check, `pnpm run demo:echo`), [`examples/coding-agent`](../../examples/coding-agent) (DeepSeek V4 + coding tools behind a terminal REPL, `pnpm run demo:repl`), [`examples/headless-agent`](../../examples/headless-agent) (the same capability class behind a one-shot positional task and DSH-native output, `pnpm run demo:headless -- "task"`), [`examples/cordis-agent`](../../examples/cordis-agent) (the self-referential runtime-inspection demo, `pnpm run demo:cordis`), and [`examples/acp-agent`](../../examples/acp-agent) (an agent exposed as an ACP server over JSON-RPC stdio — the client-driver shape, `pnpm run demo:acp`). Each leaf is its swappable backends plus one app-package entry: the stdio demos load [`@deepseek-ai/dsh-stdio-demo`](../../packages/examples/stdio-demo), the headless demo loads [`@deepseek-ai/dsh-cli-demo`](../../packages/examples/cli-demo), the ACP demo loads [`@deepseek-ai/dsh-acp-demo`](../../packages/examples/acp-demo), and all three app packages share the spine through [`@deepseek-ai/dsh-agent-spine-demo`](../../packages/examples/agent-spine-demo).
 
 ## The feature → mechanism map
 

docs/cookbook/extension-cookbook.zh.md

@@ -87,7 +87,7 @@ export function apply(ctx: Context) {
 
 ## 可运行的组装示例
 
-三个完整示例从 `cordis.yml` 加载各自的插件树：[`examples/echo-agent`](../../examples/echo-agent)（mock 模型 + echo 工具——全 mock 骨架检查，`pnpm run demo:echo`）、[`examples/coding-agent`](../../examples/coding-agent)（DeepSeek V4 + bash 工具套件，配合终端 REPL UI，`pnpm run demo:repl`）、[`examples/acp-agent`](../../examples/acp-agent)（通过 JSON-RPC stdio 暴露为 ACP 服务器的 agent——客户端驱动形态，`pnpm run demo:acp`）。每个叶子只是其可替换后端加一个 app 包入口：stdio 演示加载 [`@deepseek-ai/dsh-stdio-demo`](../../packages/examples/stdio-demo)，ACP 演示加载 [`@deepseek-ai/dsh-acp-demo`](../../packages/examples/acp-demo)，两个 app 包通过 [`@deepseek-ai/dsh-agent-spine-demo`](../../packages/examples/agent-spine-demo) bundle 共享主干。
+五个完整示例从 `cordis.yml` 加载各自的插件树：[`examples/echo-agent`](../../examples/echo-agent)（mock 模型 + echo 工具——全 mock 骨架检查，`pnpm run demo:echo`）、[`examples/coding-agent`](../../examples/coding-agent)（DeepSeek V4 + coding 工具，配合终端 REPL，`pnpm run demo:repl`）、[`examples/headless-agent`](../../examples/headless-agent)（同类能力通过单次位置任务和 DSH 原生输出运行，`pnpm run demo:headless -- "task"`）、[`examples/cordis-agent`](../../examples/cordis-agent)（自引用的运行时检查演示，`pnpm run demo:cordis`）、[`examples/acp-agent`](../../examples/acp-agent)（通过 JSON-RPC stdio 暴露为 ACP 服务器的 agent——客户端驱动形态，`pnpm run demo:acp`）。每个叶子由其可替换后端加一个 app 包入口组成：stdio 演示加载 [`@deepseek-ai/dsh-stdio-demo`](../../packages/examples/stdio-demo)，headless 演示加载 [`@deepseek-ai/dsh-cli-demo`](../../packages/examples/cli-demo)，ACP 演示加载 [`@deepseek-ai/dsh-acp-demo`](../../packages/examples/acp-demo)，三个 app 包都通过 [`@deepseek-ai/dsh-agent-spine-demo`](../../packages/examples/agent-spine-demo) 共享主干。
 
 ## 功能→机制映射