Remove the Echo agent

docs/cookbook/adding-a-tool.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
-adding-a-tool.md: 68a8449bc189497b917efe678837d757f85aaf75
-adding-a-tool.zh.md: 003534e04550bfbee6740aa3b6bee02ac2cdc237
+adding-a-tool.md: a45315dc0ec92ab28963c2aca32dffcf5f778dcd
+adding-a-tool.zh.md: f574957ddd0e42cedc93ddc0f3270110a8f110c5

docs/cookbook/adding-a-tool.md

@@ -2,7 +2,7 @@
 
 English | [中文](adding-a-tool.zh.md)
 
-How to give the model a new capability. Reference implementations: `examples/echo-agent/src/echo-tool.ts` (minimal) and `packages/bash/tool-bash` (production-grade, three-package seam).
+How to give the model a new capability. The minimal shape below shows the contract; `packages/bash/tool-bash` is the production-grade three-package seam.
 
 ## The minimal shape
 

docs/cookbook/adding-a-tool.zh.md

@@ -2,7 +2,7 @@
 
 [English](adding-a-tool.md) | 中文
 
-如何为模型赋予一项新能力。参考实现：`examples/echo-agent/src/echo-tool.ts`（最小化）和 `packages/bash/tool-bash`（生产级，由三个包（package）构成的 seam）。
+如何为模型赋予一项新能力。下文的最小形态展示这项契约；`packages/bash/tool-bash` 是生产级、由三个包（package）构成的 seam。
 
 ## 最小形态
 

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: 811eeb04d1730a8062454f932477d1e05275f3cf
-extension-cookbook.zh.md: a1c22aeffcd337401bed9444ebd52ebd5b524595
+extension-cookbook.md: 32877b6170fd75ec901dda7cc0aec6b5a92e6cc6
+extension-cookbook.zh.md: d6bb6075b47867dcb5a848c835062ef4d9af5d45

docs/cookbook/extension-cookbook.md

@@ -87,7 +87,7 @@ export function apply(ctx: Context) {
 
 ## Runnable wirings
 
-Five runnable leaves load their plugin trees from `cordis.yml`: [`examples/echo-agent`](../../examples/echo-agent) (keyless mock model + echo tool through Headless, `pnpm run demo:echo "task"`), [`examples/tui-agent`](../../examples/tui-agent) (DeepSeek coding tools through the full-screen TUI, `pnpm run demo:tui`), [`examples/headless-agent`](../../examples/headless-agent) (the coding capabilities behind a one-shot task and DSH-native output, `pnpm run demo:headless "task"`), [`examples/cordis-agent`](../../examples/cordis-agent) (self-inspection and dynamic plugin mounting through the TUI, `pnpm run demo:cordis`), and [`examples/acp-agent`](../../examples/acp-agent) (an ACP server over JSON-RPC stdio, `pnpm run demo:acp`). Interactive leaves load [`@deepseek-ai/dsh-tui-demo`](../../packages/examples/tui-demo), non-interactive leaves load [`@deepseek-ai/dsh-cli-demo`](../../packages/examples/cli-demo), the ACP leaf loads [`@deepseek-ai/dsh-acp-demo`](../../packages/examples/acp-demo), and all three app packages share [`@deepseek-ai/dsh-agent-spine-demo`](../../packages/examples/agent-spine-demo).
+Four runnable leaves load their plugin trees from `cordis.yml`: [`examples/tui-agent`](../../examples/tui-agent) (DeepSeek coding tools through the full-screen TUI, `pnpm run demo:tui`), [`examples/headless-agent`](../../examples/headless-agent) (the coding capabilities behind a one-shot task and DSH-native output, `pnpm run demo:headless "task"`), [`examples/cordis-agent`](../../examples/cordis-agent) (self-inspection and dynamic plugin mounting through the TUI, `pnpm run demo:cordis`), and [`examples/acp-agent`](../../examples/acp-agent) (an ACP server over JSON-RPC stdio, `pnpm run demo:acp`). Interactive leaves load [`@deepseek-ai/dsh-tui-demo`](../../packages/examples/tui-demo), non-interactive leaves load [`@deepseek-ai/dsh-cli-demo`](../../packages/examples/cli-demo), the ACP leaf loads [`@deepseek-ai/dsh-acp-demo`](../../packages/examples/acp-demo), and all three app packages share [`@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
 
-五个可运行叶子从 `cordis.yml` 加载各自的插件树：[`examples/echo-agent`](../../examples/echo-agent)（通过 Headless 运行的 keyless mock 模型 + echo 工具，`pnpm run demo:echo "task"`）、[`examples/tui-agent`](../../examples/tui-agent)（通过全屏 TUI 运行的 DeepSeek coding 工具，`pnpm run demo:tui`）、[`examples/headless-agent`](../../examples/headless-agent)（通过单次任务和 DSH 原生输出运行的 coding 能力，`pnpm run demo:headless "task"`）、[`examples/cordis-agent`](../../examples/cordis-agent)（通过 TUI 进行自我检查和动态插件挂载，`pnpm run demo:cordis`）与 [`examples/acp-agent`](../../examples/acp-agent)（通过 JSON-RPC stdio 暴露的 ACP 服务器，`pnpm run demo:acp`）。交互式叶子加载 [`@deepseek-ai/dsh-tui-demo`](../../packages/examples/tui-demo)，非交互式叶子加载 [`@deepseek-ai/dsh-cli-demo`](../../packages/examples/cli-demo)，ACP 叶子加载 [`@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。
+四个可运行叶子从 `cordis.yml` 加载各自的插件树：[`examples/tui-agent`](../../examples/tui-agent)（通过全屏 TUI 运行的 DeepSeek coding 工具，`pnpm run demo:tui`）、[`examples/headless-agent`](../../examples/headless-agent)（通过单次任务和 DSH 原生输出运行的 coding 能力，`pnpm run demo:headless "task"`）、[`examples/cordis-agent`](../../examples/cordis-agent)（通过 TUI 进行自我检查和动态插件挂载，`pnpm run demo:cordis`）与 [`examples/acp-agent`](../../examples/acp-agent)（通过 JSON-RPC stdio 暴露的 ACP 服务器，`pnpm run demo:acp`）。交互式叶子加载 [`@deepseek-ai/dsh-tui-demo`](../../packages/examples/tui-demo)，非交互式叶子加载 [`@deepseek-ai/dsh-cli-demo`](../../packages/examples/cli-demo)，ACP 叶子加载 [`@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