agents-coder.html
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<!doctype html>
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<title>Coder Agent · 完整 Skill 规范 · LemonBoss PRD</title>
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<div class="crumb"><span class="pill">02 · DESIGN / Agents</span><span class="sep">/</span><span>Coder Agent</span></div>
<h1>Coder Agent · 完整 Skill 规范</h1>
<p class="deck">DevLoop 的代码主力。读 SDD 内对应 Unit 的 <code><pre data-contract></code> + 上游 Unit 的 <code>contract.json</code>,产 <code>units/{id}/code/**</code> + <code>contract.json</code> + <code>coder.log</code>。是 L1 内被调用频率最高的 Agent。</p>
</header>
<article class="body">
<section>
<div class="agent-hero">
<div class="avatar" style="background:var(--L1-tint);color:var(--L1)">C</div>
<div>
<h2 style="margin:0">Coder Agent</h2>
<p style="margin:6px 0">写前后端代码 · 暴露契约 · 自己留决策日志</p>
<div class="meta">
<div><b>Loop</b> <span class="tag L1">L1</span></div>
<div><b>Model</b> Sonnet 4.6</div>
<div><b>Modes</b> implement · retry · resume</div>
<div><b>沙箱</b> units/{unitId}/ 内 code/ + contract.json + coder.log</div>
<div><b>会话复用</b> 是(SessionPool key = coder.cid.pid.unitId)</div>
</div>
</div>
</div>
</section>
<section>
<h2>① 功能需求</h2>
<ol>
<li><b>三种调用模式:</b>
<ul style="padding-left:20px">
<li><code>implement</code> · Unit 首次写代码</li>
<li><code>retry</code> · Tester 红 → 基于 failures + hint + 自己历史 coder.log <b>反思</b>后重写</li>
<li><code>resume</code> · 崩溃恢复</li>
</ul>
</li>
<li><b>读契约写代码:</b>从 SDD 找 <code>data-unit-id={自己}</code> section,读 contract + acceptance。每个 depends_on Unit 只读 <code>contract.json</code>,<b>不</b>读它们 code/。</li>
<li><b>遵循 LemonBoss 代码约定:</b>
<ul style="padding-left:20px">
<li>后端:Express route + service 双层;DB 用 <code>better-sqlite3</code>(参考 memory)</li>
<li>前端:Vue 3 Composition API + vue-i18n(key 复用既有)</li>
<li>路径别名 <code>@server</code> 可用,不要新增别名</li>
<li>禁止重新发明轮子(已有 <code>scheduler / process-guard</code> 等直接用)</li>
</ul>
</li>
<li><b>产 <code>contract.json</code>:</b>结构必须与 SDD 描述一致;<code>version</code> 字段 = <code>hash_contract(contract.exports)</code>,必须与 units.json 中该 Unit 的 contract_hash 一致。</li>
<li><b>反思能力:</b>retry 时显式说明「上次错 X,这次改 Y,因为 Z」,写入 coder.log。不允许重写时忽略 history。</li>
<li><b>不写测试:</b>Tester 的活。写测试容易写「永远绿」的 trivial case。</li>
<li><b>不读、不动其他 Unit 的代码 / 契约。</b>违反 → 沙箱拒绝。</li>
</ol>
</section>
<section>
<h2>② Skill 设计</h2>
<h3>2.1 输出沙箱(严格)</h3>
<pre class="tree">
data/companies/{cid}/projects/{pid}/units/{unitId}/
├── spec.json <span class="com"># 只读 (Architect 写)</span>
├── code/ <span class="com"># Coder 写 ★</span>
│ ├── server.js <span class="com"># 后端入口 (be 类)</span>
│ ├── service.js <span class="com"># 业务逻辑</span>
│ ├── schema.sql <span class="com"># DB DDL (含 db Unit 时)</span>
│ └── ... (Coder 自由组织)
├── contract.json <span class="com"># Coder 写 ★ 必须与 SDD 一致</span>
└── coder.log <span class="com"># Coder 写 ★ append-only 决策日志</span>
<span class="com"># Coder 可读路径(只读):</span>
sdd/mvcp/*.html <span class="com"># 仅自己 unit 的 section</span>
../{depends_on Unit}/contract.json <span class="com"># 上游 contract,不读 code/</span>
units.json <span class="com"># 只读 contract_hash 对比</span>
</pre>
<h3>2.2 完整 System Prompt(可拷贝直用)</h3>
<p>落 <code>system/agents/devloop-coder/prompt.md</code>。LoopController 注入时头部补 <code>## Memory</code> + <code>## Unit Spec</code>(含 sdd section 节选 + 上游 contract 摘要),尾部补 <code>## Retry History</code>(retry 模式时)。</p>
<pre class="code"><span class="c"># ROLE</span>
<span class="v">你是 LemonBoss DevLoop 的 Coder Agent。本次任务:实现 Unit {unitId}。</span>
<span class="v">读 SDD 内的 Unit spec + contract,写代码到 ./code/,写 contract.json,</span>
<span class="v">记录自己的决策到 coder.log。</span>
<span class="c"># MODES</span>
<span class="v">- "implement" Unit 首次实现</span>
<span class="v">- "retry" 上次 Tester 红了,基于 history 反思后重写</span>
<span class="v">- "resume" 从 resume_token 继续</span>
<span class="c"># SANDBOX (强约束 - 越界自动拒绝)</span>
<span class="v">你<b>只能</b>写:</span>
<span class="v"> ./code/**</span>
<span class="v"> ./contract.json</span>
<span class="v"> ./coder.log</span>
<span class="v">禁止写:</span>
<span class="v"> ./tests/** (Tester 的领地)</span>
<span class="v"> ../{别的 unit}/** (其他 Unit 的领地)</span>
<span class="v"> ../../sdd/** (Architect 的领地)</span>
<span class="v"> ../../prd/** (PM 的领地)</span>
<span class="v"> ../../units.json (Architect/UnitRegistry 的)</span>
<span class="v">你可读:</span>
<span class="v"> ./spec.json (Architect 写的本 Unit 元数据)</span>
<span class="v"> ../../sdd/mvcp/*.html (只看自己 unit 的 section)</span>
<span class="v"> ../{depends_on}/contract.json (上游 contract,不读它们 code/)</span>
<span class="v"> ./coder.log (retry 时反思自己历史)</span>
<span class="v"> ./runs/{最新}/result.json (retry 时看 Tester failures)</span>
<span class="c"># MANDATORY WORKFLOW</span>
<span class="v">## step 0 · 读上下文</span>
<span class="v"> - implement: 读 spec.json + sdd section + 全部上游 contract.json</span>
<span class="v"> - retry: 上面全部 + 读自己 coder.log + 最近 runs/{}/result.json</span>
<span class="v"> - resume: 由 LoopController 注入 resume context</span>
<span class="v">## step 1 · write_todolist</span>
<span class="v">### implement 典型 (6 项):</span>
<span class="v"> step-001 解析 SDD 的 Unit spec + 上游 contracts</span>
<span class="v"> step-002 设计 code/ 文件结构 (后端: server + service + (schema if db);前端: component + composable)</span>
<span class="v"> step-003 实现核心逻辑</span>
<span class="v"> step-004 写 contract.json (结构匹配 SDD)</span>
<span class="v"> step-005 调 hash_contract → 验证 version 与 units.json 中 contract_hash 一致</span>
<span class="v"> step-006 append coder.log 决策摘要 + 自检 sandbox</span>
<span class="v">### retry 典型 (5 项):</span>
<span class="v"> step-001 读 failures + hint + 自己 coder.log</span>
<span class="v"> step-002 反思: 上次错 X, 真正原因 Y, 这次改 Z</span>
<span class="v"> step-003 精准 patch code/(改最小范围)</span>
<span class="v"> step-004 如有契约调整 → 同步更新 contract.json + 重新 hash</span>
<span class="v"> step-005 append coder.log 新决策 (explicit:"上次 X,这次 Y,因 Z")</span>
<span class="c"># RULES (硬约束)</span>
<span class="v">1. 任何 curl/带 JSON body 的 Bash 命令 → 先写 /tmp/*.json 再 -d @file</span>
<span class="v"> 参见 CLAUDE.md L91-99。jsonGuard 中间件会拦截 inline JSON 自动拒绝。</span>
<span class="v"> 反例(禁): curl -d '{"k":"v"}' http://...</span>
<span class="v"> 正例: echo '{"k":"v"}' > /tmp/x.json && curl -d @/tmp/x.json http://...</span>
<span class="v">2. contract.json 必须先调 hash_contract 工具计算 version。</span>
<span class="v"> 不要手算 sha256。算出来的 version 必须 === units.json 中本 Unit 的 contract_hash。</span>
<span class="v"> 如不一致 → 你产的 contract 跟 SDD 不匹配,必须改 code/ 让它匹配。</span>
<span class="v">3. retry 时 coder.log 必须含 "上次 X 这次 Y 因 Z" 结构,不允许只写"修了 bug"。</span>
<span class="v">4. 不读其他 Unit 的 code/。只读 contract.json。</span>
<span class="v"> 反例(禁): cat ../profile-be/code/server.js</span>
<span class="v"> 正例: cat ../profile-be/contract.json</span>
<span class="v">5. 后端 Unit 必须用 better-sqlite3 (memory 一致)。不要 mysql/postgres/mongodb。</span>
<span class="v">6. 前端 Unit 用 Vue 3 Composition API + script setup,不用 Options API。</span>
<span class="v">7. 写完每个 step 立即 update_todo_item, 不要批处理。</span>
<span class="v">8. 不调 call_sub_agent。Coder 不分派。</span>
<span class="c"># 反思模板 (retry 时强制用)</span>
<span class="v">在 coder.log 写新条目时,用这个模板:</span>
<span class="v"> ---</span>
<span class="v"> attempt: 2</span>
<span class="v"> ts: 2026-05-13T10:32:08Z</span>
<span class="v"> last_failure: login.invalid-pwd 期望 401 收 500</span>
<span class="v"> last_cause: 没处理 user 不存在,直接 bcrypt.compare(null,...) 抛 TypeError</span>
<span class="v"> this_fix: service.js login() 先 SELECT user, user 缺失或 pwd 错统一 return 401</span>
<span class="v"> rationale: 401 是"凭据无效"的语义,不该用 500 (服务器错误) 暴露用户不存在</span>
<span class="v"> changed_files: [code/auth-service.js]</span>
<span class="v"> ---</span>
<span class="c"># SELF-CHECK (完工前必跑)</span>
<span class="v">1. contract.json hash 与 units.json[unitId].contract_hash 一致</span>
<span class="v">2. code/ 下文件能 node --check 通过 (be); 前端能 vite build dry-run 通过 (fe)</span>
<span class="v">3. coder.log 这次有新一条决策 (implement 1 条, retry 模板格式)</span>
<span class="v">4. 没有写 code/ 沙箱外的文件</span>
<span class="v">5. todolist 全 done</span>
<span class="c"># OUTPUT VOICE</span>
<span class="v">- 代码风格遵循 LemonBoss 既有 (扫 server/services/* 仿)</span>
<span class="v">- 不写大段注释,只在 WHY 非显然时一行</span>
<span class="v">- 不写"完美""强大",数字胜过形容词</span>
<span class="v">- coder.log 用人话不是 emoji</span></pre>
<h3>2.3 工具集(含签名)</h3>
<table>
<thead><tr><th>工具</th><th>签名</th><th>用途</th><th>访问边界</th></tr></thead>
<tbody>
<tr><td><code>Read</code></td><td>(path)</td><td>读 spec/sdd/上游 contract/历史 log</td><td>沙箱白名单</td></tr>
<tr><td><code>Edit</code></td><td>(path, old, new)</td><td>精准修改(retry 时常用)</td><td>code/** + contract.json</td></tr>
<tr><td><code>Write</code></td><td>(path, content)</td><td>新文件</td><td>code/** + contract.json + coder.log</td></tr>
<tr><td><code>Bash</code></td><td>(cmd)</td><td>跑 npm install · lint · syntax check · curl</td><td>cwd 锁 units/{unitId}/, jsonGuard 强制</td></tr>
<tr><td><code>hash_contract</code> <span class="tag NEW">NEW</span></td><td>(contract) → "sha256:..."</td><td>同 Architect 工具,复用</td><td>—</td></tr>
<tr><td><code>contract_bridge</code> <span class="tag NEW">NEW</span></td><td>(pid, unitId) → {ok, expected, actual}</td><td>对比 contract.json 与 units.json 中 hash</td><td>—</td></tr>
<tr><td><code>sandbox_check</code> <span class="tag NEW">NEW</span></td><td>(pid, unitId) → {ok, violations[]}</td><td>扫所有本 Unit 文件确认无越界</td><td>—</td></tr>
<tr><td><code>append_coder_log</code> <span class="tag NEW">NEW</span></td><td>(decision: object)</td><td>结构化追加 coder.log(含 attempt/last_failure/this_fix 字段)</td><td>coder.log only</td></tr>
<tr><td><code>write_todolist</code></td><td>(items)</td><td>同 PM/Architect</td><td>agent-state/</td></tr>
<tr><td><code>update_todo_item</code></td><td>(id, status, output_ref?)</td><td>同上</td><td>—</td></tr>
<tr><td><code>update_runtime_state</code></td><td>(step, total)</td><td>同上</td><td>—</td></tr>
<tr><td><code>timeline_append</code></td><td>(kind, ref, summary)</td><td>同上 · 典型 kind: unit_coded · code_patched</td><td>—</td></tr>
<tr><td><code>record_memory</code></td><td>(topic, content, relevance)</td><td>同上 · memory/devloop/coder/</td><td>memory/devloop/coder/</td></tr>
</tbody>
</table>
<h3>2.4 禁用的工具 / 行为</h3>
<div class="callout warn">
<ul style="margin:0">
<li><b>不允许 call_sub_agent</b> — Coder 不分派</li>
<li><b>不允许 inline JSON Bash</b> — jsonGuard 强制拦截</li>
<li><b>不允许写</b>:tests/ · ../别的 unit/ · sdd/ · prd/ · units.json · integration/</li>
<li><b>不允许读</b>其他 Unit 的 code/(仅 contract.json)</li>
<li><b>不允许跳过反思</b> — retry 模式 coder.log 必含 "last_failure/this_fix" 字段</li>
</ul>
</div>
</section>
<section>
<h2>③ 持久化集成</h2>
<p>与 PM/Architect 同模式:开工前 LoopController 注入 memory,结束前可写新 memory(少用,Coder memory 通常是<b>代码风格偏好</b>)。todolist + runtime + timeline 同步。</p>
<p><b>retry 模式的特殊性:</b><code>history</code> 字段由 LoopController 注入到 prompt 尾部,含上一次 failure + hint + 旧 coder.log 摘要。<b>Coder 不主动读 history</b>,从 prompt 拿。</p>
<p><b>Coder memory 典型话题:</b></p>
<ul>
<li>"never use callback style, prefer async/await"</li>
<li>"401 vs 500: 凭据问题 401, 服务器内部错 500"</li>
<li>"sqlite better-sqlite3 同步 API, 不要 await db.query"</li>
</ul>
</section>
<section>
<h2>④ I/O 契约</h2>
<pre class="code"><span class="k">const</span> CoderInput = Type.<span class="n">Object</span>(<span class="p">{</span>
pid: Type.<span class="n">String</span>(),
unit_id: Type.<span class="n">String</span>(),
mode: Type.<span class="n">Union</span>(<span class="p">[</span>Type.<span class="n">Literal</span>(<span class="s">'implement'</span>),
Type.<span class="n">Literal</span>(<span class="s">'retry'</span>),
Type.<span class="n">Literal</span>(<span class="s">'resume'</span>)<span class="p">]</span>),
<span class="c">// retry 模式由 LoopController 注入</span>
history: Type.<span class="n">Optional</span>(Type.<span class="n">Array</span>(Type.<span class="n">Object</span>(<span class="p">{</span>
attempt: Type.<span class="n">Number</span>(),
my_decision: Type.<span class="n">String</span>(), <span class="c">// 上次的反思条目</span>
tester_said: Type.<span class="n">Array</span>(Type.<span class="n">Any</span>()), <span class="c">// 上次 failures</span>
<span class="p">}</span>))),
reflect_hint: Type.<span class="n">Optional</span>(Type.<span class="n">String</span>()), <span class="c">// Tester 给的 hint</span>
resume_token: Type.<span class="n">Optional</span>(Type.<span class="n">String</span>()),
call_id: Type.<span class="n">String</span>(),
company_id: Type.<span class="n">String</span>(),
<span class="p">}</span>);
<span class="k">const</span> CoderOutput = Type.<span class="n">Object</span>(<span class="p">{</span>
ok: Type.<span class="n">Boolean</span>(),
mode: Type.<span class="n">String</span>(),
unit_id: Type.<span class="n">String</span>(),
attempt: Type.<span class="n">Number</span>(),
files_written: Type.<span class="n">Array</span>(Type.<span class="n">String</span>()),
contract_hash: Type.<span class="n">String</span>(),
contract_match_sdd: Type.<span class="n">Boolean</span>(),
decision: Type.<span class="n">Object</span>(<span class="p">{</span> <span class="c">// 本次 coder.log 主条目摘要</span>
last_failure: Type.<span class="n">Optional</span>(Type.<span class="n">String</span>()),
this_fix: Type.<span class="n">String</span>(),
rationale: Type.<span class="n">String</span>(),
changed_files: Type.<span class="n">Array</span>(Type.<span class="n">String</span>()),
<span class="p">}</span>),
sandbox_violations: Type.<span class="n">Array</span>(Type.<span class="n">String</span>()), <span class="c">// 必为 []</span>
duration_ms: Type.<span class="n">Number</span>(),
tokens_used: Type.<span class="n">Number</span>(),
<span class="p">}</span>);</pre>
</section>
<section>
<h2>⑤ 上下游传递</h2>
<div class="io-grid">
<div class="io-box">
<h4>⬆ 上游</h4>
<ul>
<li><b>Architect</b> · 通过 spec.json + sdd section</li>
<li><b>上游 Unit 的 Coder</b>(已完成)· 通过 ../{dep}/contract.json</li>
<li><b>LoopController</b> · 注入 input + memory + (retry 时) history</li>
<li><b>Tester</b>(retry 时间接)· 通过 runs/{}/result.json failures</li>
</ul>
</div>
<div class="io-box">
<h4>⬇ 下游</h4>
<ul>
<li><b>Tester</b> · 读 code/ + contract.json 写测试</li>
<li><b>下游 Unit 的 Coder</b> · 读我的 contract.json(不读 code)</li>
<li><b>Integrator</b>(L2 时)· 起 code/ 真实进程跑 e2e</li>
<li><b>UnitRegistry</b> · 接 status: coding → testing</li>
<li><b>BugTriager</b>(L2 失败时)· 读 code/ + contract.json + coder.log 做归因</li>
</ul>
</div>
</div>
</section>
<section>
<h2>⑥ 完整执行样例</h2>
<div class="tabs" data-tabs>
<div class="tabbar" role="tablist">
<button role="tab" aria-selected="true" aria-controls="ca">Sample A · implement (todo-be)</button>
<button role="tab" aria-selected="false" aria-controls="cb">Sample B · retry (反思后重写)</button>
<button role="tab" aria-selected="false" aria-controls="cc">Sample C · resume (崩溃恢复)</button>
</div>
<div class="tabpanel" id="ca">
<pre class="code"><span class="c"># ─────────── INPUT ───────────</span>
<span class="p">{</span>
<span class="n">"pid"</span>: <span class="s">"p-test001"</span>,
<span class="n">"unit_id"</span>: <span class="s">"todo-be"</span>,
<span class="n">"mode"</span>: <span class="s">"implement"</span>,
<span class="n">"call_id"</span>: <span class="s">"call-c-001"</span>,
<span class="n">"company_id"</span>: <span class="s">"c-test"</span>
<span class="p">}</span>
<span class="c"># INJECTED MEMORY</span>
## Memory (from prior projects)
### sqlite-conventions (relevance: 0.93)
- better-sqlite3 是同步 API,不要 await
- prepared statement 优先于字符串拼接
- 写在 service 层,不直接在 route 用
### http-status (relevance: 0.88)
- 400 客户端语法错; 401 凭据无效; 404 不存在; 409 冲突
- 201 Created 含 Location header
<span class="c"># INJECTED Unit Spec (摘自 sdd/mvcp/control.html)</span>
## Unit Spec: todo-be
contract:
POST /api/todos body: { title: string (1..200) }
→ 201 { id, title, created_at }
→ 400 { error: "title_required" } | { error: "title_too_long" }
GET /api/todos → 200 { items: [{ id, title, created_at }, ...] }
acceptance:
- 创建后能列出
- 空 title 返 400
- 200+ 字符 title 返 400
<span class="c"># ─────────── 内部执行 ───────────</span>
<span class="c"># step 1 · write_todolist (implement 6 项)</span>
<span class="c"># step 2 · 设计文件结构</span>
<span class="c"># code/server.js Express app + route</span>
<span class="c"># code/service.js 业务逻辑 + DB</span>
<span class="c"># code/schema.sql DDL (schema 简单,内联在 service)</span>
<span class="c"># step 3 · Write code/service.js</span>
<span class="k">const</span> Database = <span class="n">require</span>(<span class="s">'better-sqlite3'</span>);
<span class="k">const</span> db = <span class="k">new</span> <span class="n">Database</span>(<span class="s">':memory:'</span>);
db.<span class="n">exec</span>(<span class="s">`CREATE TABLE todos (id INTEGER PRIMARY KEY AUTOINCREMENT,
title TEXT NOT NULL, created_at TEXT DEFAULT CURRENT_TIMESTAMP)`</span>);
<span class="k">const</span> insertStmt = db.<span class="n">prepare</span>(<span class="s">'INSERT INTO todos (title) VALUES (?)'</span>);
<span class="k">const</span> listStmt = db.<span class="n">prepare</span>(<span class="s">'SELECT id, title, created_at FROM todos ORDER BY id DESC'</span>);
<span class="k">function</span> <span class="n">create</span>(title) <span class="p">{</span>
<span class="k">if</span> (!title || title.<span class="n">length</span> === <span class="v">0</span>) <span class="k">return</span> <span class="p">{</span> error: <span class="s">'title_required'</span> <span class="p">}</span>;
<span class="k">if</span> (title.<span class="n">length</span> > <span class="v">200</span>) <span class="k">return</span> <span class="p">{</span> error: <span class="s">'title_too_long'</span> <span class="p">}</span>;
<span class="k">const</span> r = insertStmt.<span class="n">run</span>(title);
<span class="k">return</span> listStmt.<span class="n">get</span>(r.<span class="n">lastInsertRowid</span>) || <span class="p">{</span> id: r.<span class="n">lastInsertRowid</span>, title <span class="p">}</span>;
<span class="p">}</span>
<span class="k">module.exports</span> = <span class="p">{</span> create, list: () => (<span class="p">{</span> items: listStmt.<span class="n">all</span>() <span class="p">}</span>) <span class="p">}</span>;
<span class="c"># step 3 · Write code/server.js</span>
<span class="k">const</span> express = <span class="n">require</span>(<span class="s">'express'</span>);
<span class="k">const</span> svc = <span class="n">require</span>(<span class="s">'./service'</span>);
<span class="k">const</span> app = <span class="n">express</span>();
app.<span class="n">use</span>(express.<span class="n">json</span>());
app.<span class="n">post</span>(<span class="s">'/api/todos'</span>, (req, res) => <span class="p">{</span>
<span class="k">const</span> r = svc.<span class="n">create</span>(req.<span class="n">body</span>.<span class="n">title</span>);
<span class="k">if</span> (r.<span class="n">error</span>) <span class="k">return</span> res.<span class="n">status</span>(<span class="v">400</span>).<span class="n">json</span>(r);
res.<span class="n">status</span>(<span class="v">201</span>).<span class="n">json</span>(r);
<span class="p">}</span>);
app.<span class="n">get</span>(<span class="s">'/api/todos'</span>, (req, res) => res.<span class="n">json</span>(svc.<span class="n">list</span>()));
<span class="k">module.exports</span> = app;
<span class="c"># step 4 · Write contract.json</span>
<span class="p">{</span>
<span class="n">"unit_id"</span>: <span class="s">"todo-be"</span>,
<span class="n">"version"</span>: <span class="s">"sha256:4a7c8e2f9d1b3a5e"</span>,
<span class="n">"exports"</span>: <span class="p">{</span>
<span class="n">"http"</span>: <span class="p">[</span>
<span class="p">{</span> <span class="n">"method"</span>:<span class="s">"POST"</span>, <span class="n">"path"</span>:<span class="s">"/api/todos"</span>,
<span class="n">"request"</span>:<span class="p">{</span><span class="n">"title"</span>:<span class="s">"string"</span><span class="p">}</span>,
<span class="n">"responses"</span>:<span class="p">{</span>
<span class="n">"201"</span>:<span class="p">{</span><span class="n">"id"</span>:<span class="s">"number"</span>,<span class="n">"title"</span>:<span class="s">"string"</span>,<span class="n">"created_at"</span>:<span class="s">"string"</span><span class="p">}</span>,
<span class="n">"400"</span>:<span class="p">{</span><span class="n">"error"</span>:<span class="s">"\"title_required\" | \"title_too_long\""</span><span class="p">}</span>
<span class="p">}</span> <span class="p">}</span>,
<span class="p">{</span> <span class="n">"method"</span>:<span class="s">"GET"</span>, <span class="n">"path"</span>:<span class="s">"/api/todos"</span>, ... <span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>,
<span class="n">"consumes"</span>: <span class="p">[]</span>
<span class="p">}</span>
<span class="c"># step 5 · contract_bridge → { ok: true, expected: "sha256:4a7c8e2f9d1b3a5e", actual: 同 }</span>
<span class="c"># step 6 · append_coder_log</span>
append_coder_log(<span class="p">{</span>
attempt: <span class="v">1</span>,
this_fix: <span class="s">"首次实现 todo-be:Express + better-sqlite3 内存库 + 双端点"</span>,
rationale: <span class="s">"按 SDD 拆 server/service 双层; 内存库便于 Tester 跑 vitest"</span>,
changed_files: <span class="p">[</span><span class="s">"code/server.js"</span>, <span class="s">"code/service.js"</span><span class="p">]</span>
<span class="p">}</span>)
<span class="c"># OUTPUT</span>
<span class="p">{</span>
<span class="n">"ok"</span>: <span class="v">true</span>, <span class="n">"mode"</span>: <span class="s">"implement"</span>, <span class="n">"unit_id"</span>: <span class="s">"todo-be"</span>, <span class="n">"attempt"</span>: <span class="v">1</span>,
<span class="n">"files_written"</span>: <span class="p">[</span><span class="s">"code/server.js"</span>, <span class="s">"code/service.js"</span>, <span class="s">"contract.json"</span>, <span class="s">"coder.log"</span><span class="p">]</span>,
<span class="n">"contract_hash"</span>: <span class="s">"sha256:4a7c8e2f9d1b3a5e"</span>,
<span class="n">"contract_match_sdd"</span>: <span class="v">true</span>,
<span class="n">"decision"</span>: <span class="p">{</span> <span class="n">"this_fix"</span>: <span class="s">"首次实现..."</span>, ... <span class="p">}</span>,
<span class="n">"sandbox_violations"</span>: <span class="p">[]</span>,
<span class="n">"duration_ms"</span>: <span class="v">38_412</span>, <span class="n">"tokens_used"</span>: <span class="v">5_120</span>
<span class="p">}</span></pre>
</div>
<div class="tabpanel" id="cb" hidden>
<pre class="code"><span class="c"># ─────────── INPUT (retry mode) ───────────</span>
<span class="p">{</span>
<span class="n">"pid"</span>: <span class="s">"p-test001"</span>, <span class="n">"unit_id"</span>: <span class="s">"todo-be"</span>, <span class="n">"mode"</span>: <span class="s">"retry"</span>,
<span class="n">"history"</span>: <span class="p">[</span>
<span class="p">{</span>
<span class="n">"attempt"</span>: <span class="v">1</span>,
<span class="n">"my_decision"</span>: <span class="s">"用 better-sqlite3 内存库 + 双端点"</span>,
<span class="n">"tester_said"</span>: <span class="p">[</span>
<span class="p">{</span> <span class="n">"test"</span>:<span class="s">"empty title"</span>, <span class="n">"expected"</span>:<span class="v">400</span>, <span class="n">"got"</span>:<span class="v">500</span>,
<span class="n">"stack"</span>:<span class="s">"TypeError: title.length undefined"</span> <span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>
<span class="p">]</span>,
<span class="n">"reflect_hint"</span>: <span class="s">"title 字段缺失时 req.body.title 是 undefined,先判存在性"</span>,
...
<span class="p">}</span>
<span class="c"># INJECTED Retry History (LoopController 拼到 prompt 尾部)</span>
## Retry History
attempt 1 决策: "用 better-sqlite3 内存库 + 双端点"
attempt 1 失败:
- test "empty title" 期望 400 收 500
- stack: TypeError: title.length undefined
Tester 提示: "title 字段缺失时 req.body.title 是 undefined,先判存在性"
<span class="c"># step 1 · todolist 5 项 (retry 模板)</span>
<span class="c"># step 2 · 反思</span>
<span class="c"># 上次错: service.create(title) 内 if (!title || title.length === 0)</span>
<span class="c"># 当 title=undefined 时 title.length 抛 TypeError</span>
<span class="c"># 真正原因: undefined 没短路到 !title (空字符串才会),</span>
<span class="c"># 但 || 链对 undefined 是 truthy 之前先取 .length 抛错</span>
<span class="c"># 错!实际上 !undefined 是 true → 短路返 title_required</span>
<span class="c"># 重新看 stack: route 层先解构 body.title,如果 body 整个缺失则报错</span>
<span class="c"># ✓ 真正错: req.body 是 undefined (express.json() 没匹配 content-type)</span>
<span class="c"># step 3 · Edit code/server.js</span>
<span class="c"># - 兜底: const { title } = req.body || {};</span>
<span class="c"># step 5 · append_coder_log</span>
append_coder_log(<span class="p">{</span>
attempt: <span class="v">2</span>,
ts: <span class="s">"2026-05-13T10:32:08Z"</span>,
last_failure: <span class="s">"empty title 期望 400 收 500"</span>,
last_cause: <span class="s">"req.body 为 undefined 时解构 title 抛 TypeError"</span>,
this_fix: <span class="s">"route 层 req.body || {} 兜底,再传入 service"</span>,
rationale: <span class="s">"express.json() 对非 application/json 请求不解析,body 是 undefined"</span>,
changed_files: <span class="p">[</span><span class="s">"code/server.js"</span><span class="p">]</span>
<span class="p">}</span>)
<span class="c"># OUTPUT</span>
<span class="p">{</span>
<span class="n">"ok"</span>: <span class="v">true</span>, <span class="n">"mode"</span>: <span class="s">"retry"</span>, <span class="n">"attempt"</span>: <span class="v">2</span>,
<span class="n">"files_written"</span>: <span class="p">[</span><span class="s">"code/server.js"</span>, <span class="s">"coder.log"</span><span class="p">]</span>,
<span class="n">"contract_hash"</span>: <span class="s">"sha256:4a7c8e2f9d1b3a5e"</span>, <span class="c">// hash 不变 (只改实现)</span>
<span class="n">"contract_match_sdd"</span>: <span class="v">true</span>,
<span class="n">"decision"</span>: <span class="p">{</span>
<span class="n">"last_failure"</span>: <span class="s">"empty title 期望 400 收 500"</span>,
<span class="n">"this_fix"</span>: <span class="s">"route 层 req.body || {} 兜底"</span>,
<span class="n">"rationale"</span>: <span class="s">"express.json() 对非 JSON 请求 body 是 undefined"</span>,
<span class="n">"changed_files"</span>: <span class="p">[</span><span class="s">"code/server.js"</span><span class="p">]</span>
<span class="p">}</span>,
...
<span class="p">}</span></pre>
</div>
<div class="tabpanel" id="cc" hidden>
<pre class="code"><span class="c"># ─────────── INPUT (resume) ───────────</span>
<span class="p">{</span>
<span class="n">"pid"</span>: <span class="s">"p-test001"</span>, <span class="n">"unit_id"</span>: <span class="s">"todo-be"</span>,
<span class="n">"mode"</span>: <span class="s">"resume"</span>,
<span class="n">"resume_token"</span>: <span class="s">"rt-coder-...-step3"</span>,
...
<span class="p">}</span>
<span class="c"># LoopController 已注入 agent-state/coder.json + coder-todo.json</span>
<span class="c"># 上次进度: step-001/002/003 done, step-004 doing 时崩</span>
<span class="c"># code/server.js, code/service.js 已写</span>
<span class="c"># contract.json 未写</span>
<span class="c"># Coder 自动续:</span>
update_runtime_state(current_step=<span class="v">3</span>, total_steps=<span class="v">6</span>)
<span class="c"># 从 step-004 继续</span>
<span class="c"># step-004: 写 contract.json</span>
<span class="c"># step-005: contract_bridge 验证</span>
<span class="c"># step-006: append_coder_log + sandbox check</span>
<span class="c"># OUTPUT (同 Sample A 但 files_written 不含已写的)</span></pre>
</div>
</div>
</section>
<section>
<h2>⑦ 助手工具源码</h2>
<h3>7.1 <code>contract-bridge.js</code> · contract.json ↔ units.json 一致性</h3>
<pre class="code"><span class="c">// server/services/agent-tools/contract-bridge.js · ~50 行</span>
<span class="k">const</span> fs = <span class="n">require</span>(<span class="s">'fs'</span>);
<span class="k">const</span> path = <span class="n">require</span>(<span class="s">'path'</span>);
<span class="k">const</span> <span class="p">{</span> hashContract <span class="p">}</span> = <span class="n">require</span>(<span class="s">'./hash-contract'</span>);
<span class="k">function</span> <span class="n">verifyContractBridge</span>(pid, unitId) <span class="p">{</span>
<span class="k">const</span> projDir = <span class="n">projectsDir</span>(pid);
<span class="k">const</span> contractPath = path.<span class="n">join</span>(projDir, <span class="s">'units'</span>, unitId, <span class="s">'contract.json'</span>);
<span class="k">const</span> unitsPath = path.<span class="n">join</span>(projDir, <span class="s">'units.json'</span>);
<span class="k">if</span> (!fs.<span class="n">existsSync</span>(contractPath))
<span class="k">return</span> <span class="p">{</span> ok: <span class="v">false</span>, reason: <span class="s">'contract.json missing'</span> <span class="p">}</span>;
<span class="k">const</span> contract = <span class="n">JSON.parse</span>(fs.<span class="n">readFileSync</span>(contractPath, <span class="s">'utf8'</span>));
<span class="k">const</span> units = <span class="n">JSON.parse</span>(fs.<span class="n">readFileSync</span>(unitsPath, <span class="s">'utf8'</span>));
<span class="k">const</span> unit = units.<span class="n">units</span>.<span class="n">find</span>(u => u.id === unitId);
<span class="k">if</span> (!unit) <span class="k">return</span> <span class="p">{</span> ok: <span class="v">false</span>, reason: <span class="s">'unit not in units.json'</span> <span class="p">}</span>;
<span class="k">const</span> expected = unit.<span class="n">contract_hash</span>;
<span class="k">const</span> recomputed = <span class="n">hashContract</span>(contract);
<span class="c">// 还检查 contract.version 自报与重算一致</span>
<span class="k">if</span> (contract.<span class="n">version</span> !== recomputed) <span class="p">{</span>
<span class="k">return</span> <span class="p">{</span>
ok: <span class="v">false</span>,
reason: <span class="s">'contract.version self-inconsistent'</span>,
claimed: contract.<span class="n">version</span>, actual: recomputed,
<span class="p">}</span>;
<span class="p">}</span>
<span class="k">if</span> (recomputed !== expected) <span class="p">{</span>
<span class="k">return</span> <span class="p">{</span>
ok: <span class="v">false</span>,
reason: <span class="s">'contract does not match SDD-declared hash'</span>,
expected, actual: recomputed,
hint: <span class="s">'你的 contract 与 SDD 描述不一致,改 code 让契约对齐'</span>,
<span class="p">}</span>;
<span class="p">}</span>
<span class="k">return</span> <span class="p">{</span> ok: <span class="v">true</span>, hash: recomputed <span class="p">}</span>;
<span class="p">}</span>
module.<span class="n">exports</span> = <span class="p">{</span> verifyContractBridge <span class="p">}</span>;</pre>
<h3>7.2 <code>sandbox-check.js</code> · 沙箱越界扫描</h3>
<pre class="code"><span class="c">// server/services/agent-tools/sandbox-check.js · ~60 行</span>
<span class="k">const</span> fs = <span class="n">require</span>(<span class="s">'fs'</span>);
<span class="k">const</span> path = <span class="n">require</span>(<span class="s">'path'</span>);
<span class="c">/**
* 给定 (pid, unitId, since:timestamp) → 扫描自 since 起被 mtime 修改过的文件,
* 任何在沙箱外的写盘 → violations。
* 由 LoopController 在 callAgent 结束后调用。
*/</span>
<span class="k">function</span> <span class="n">scanSandbox</span>(<span class="p">{</span> pid, agent, unitId, since <span class="p">}</span>) <span class="p">{</span>
<span class="k">const</span> projDir = <span class="n">projectsDir</span>(pid);
<span class="k">const</span> allowed = <span class="p">[</span>
path.<span class="n">join</span>(projDir, <span class="s">'units'</span>, unitId, <span class="s">'code'</span>),
path.<span class="n">join</span>(projDir, <span class="s">'units'</span>, unitId, <span class="s">'contract.json'</span>),
path.<span class="n">join</span>(projDir, <span class="s">'units'</span>, unitId, <span class="s">'coder.log'</span>),
path.<span class="n">join</span>(projDir, <span class="s">'agent-state'</span>), <span class="c">// runtime/todolist 写允许</span>
path.<span class="n">join</span>(projDir, <span class="s">'timeline.ndjson'</span>),
<span class="p">]</span>;
<span class="k">const</span> violations = <span class="p">[]</span>;
<span class="n">walk</span>(projDir, (f) => <span class="p">{</span>
<span class="k">const</span> st = fs.<span class="n">statSync</span>(f);
<span class="k">if</span> (st.<span class="n">mtimeMs</span> < since) <span class="k">return</span>;
<span class="k">const</span> within = allowed.<span class="n">some</span>(a => f.<span class="n">startsWith</span>(a));
<span class="k">if</span> (!within) violations.<span class="n">push</span>(f);
<span class="p">}</span>);
<span class="k">return</span> <span class="p">{</span> ok: violations.length === <span class="v">0</span>, violations <span class="p">}</span>;
<span class="p">}</span>
<span class="k">function</span> <span class="n">walk</span>(dir, cb) <span class="p">{</span>
<span class="k">for</span> (<span class="k">const</span> e <span class="k">of</span> fs.<span class="n">readdirSync</span>(dir, <span class="p">{</span> withFileTypes: <span class="v">true</span> <span class="p">}</span>)) <span class="p">{</span>
<span class="k">const</span> p = path.<span class="n">join</span>(dir, e.<span class="n">name</span>);
<span class="k">if</span> (e.<span class="n">isDirectory</span>()) <span class="n">walk</span>(p, cb);
<span class="k">else</span> <span class="n">cb</span>(p);
<span class="p">}</span>
<span class="p">}</span>
module.<span class="n">exports</span> = <span class="p">{</span> scanSandbox <span class="p">}</span>;</pre>
<h3>7.3 <code>append-coder-log.js</code> · 结构化决策日志</h3>
<pre class="code"><span class="c">// server/services/agent-tools/append-coder-log.js · ~30 行</span>
<span class="k">const</span> fs = <span class="n">require</span>(<span class="s">'fs'</span>);
<span class="k">const</span> path = <span class="n">require</span>(<span class="s">'path'</span>);
<span class="k">function</span> <span class="n">appendCoderLog</span>(pid, unitId, decision) <span class="p">{</span>
<span class="k">const</span> required = <span class="p">[</span><span class="s">'attempt'</span>, <span class="s">'this_fix'</span>, <span class="s">'rationale'</span>, <span class="s">'changed_files'</span><span class="p">]</span>;
<span class="k">if</span> (decision.<span class="n">attempt</span> > <span class="v">1</span>) required.<span class="n">push</span>(<span class="s">'last_failure'</span>, <span class="s">'last_cause'</span>);
<span class="k">const</span> missing = required.<span class="n">filter</span>(k => !decision[k]);
<span class="k">if</span> (missing.length)
<span class="k">throw new</span> <span class="n">Error</span>(<span class="s">`coder.log decision missing fields: </span><span class="v">${missing.join(',')}</span><span class="s">`</span>);
<span class="k">const</span> p = path.<span class="n">join</span>(<span class="n">projectsDir</span>(pid), <span class="s">'units'</span>, unitId, <span class="s">'coder.log'</span>);
<span class="k">const</span> block = <span class="s">'---\n'</span>
+ <span class="n">Object.entries</span>(decision)
.<span class="n">map</span>(([k, v]) => <span class="s">`</span><span class="v">${k}</span><span class="s">: </span><span class="v">${typeof v === 'object' ? JSON.stringify(v) : v}</span><span class="s">`</span>)
.<span class="n">join</span>(<span class="s">'\n'</span>)
+ <span class="s">'\n---\n\n'</span>;
fs.<span class="n">appendFileSync</span>(p, block);
<span class="k">return</span> <span class="p">{</span> ok: <span class="v">true</span> <span class="p">}</span>;
<span class="p">}</span>
module.<span class="n">exports</span> = <span class="p">{</span> appendCoderLog <span class="p">}</span>;</pre>
</section>
<section>
<h2>⑧ 自检 Checklist</h2>
<table>
<thead><tr><th>#</th><th>检查项</th><th>命令 / 工具</th><th>通过判定</th></tr></thead>
<tbody>
<tr><td>1</td><td>contract.json hash 一致</td><td><code>verifyContractBridge(pid, unitId)</code></td><td>ok=true</td></tr>
<tr><td>2</td><td>code/ 文件能 parse</td><td>be: <code>node --check code/server.js</code>;fe: vite dry-run</td><td>0 退出</td></tr>
<tr><td>3</td><td>coder.log 新条目</td><td>file mtime > call start</td><td>true</td></tr>
<tr><td>4</td><td>retry 模式 coder.log 含 last_failure / this_fix</td><td>regex 校验最末条目</td><td>命中</td></tr>
<tr><td>5</td><td>沙箱无越界</td><td><code>scanSandbox</code></td><td>violations=[]</td></tr>
<tr><td>6</td><td>不读其他 Unit code/</td><td>session log review</td><td>无 ../{xxx-(be|fe|mw|db)}/code 路径出现</td></tr>
<tr><td>7</td><td>todolist 全 done</td><td>read agent-state/coder-todo.json</td><td>全 done</td></tr>
<tr><td>8</td><td>timeline 含 unit_coded</td><td>tail timeline.ndjson</td><td>命中</td></tr>
<tr><td>9</td><td>agent-state.coder.json 终态</td><td>read M-10</td><td>status=done</td></tr>
<tr><td>10</td><td>无 Bash inline JSON</td><td>jsonGuard 中间件实时拦截 (运行时无遗漏)</td><td>0 拒绝事件</td></tr>
</tbody>
</table>
<p class="sig">任一不过 → 不输出 ok=true。retry 最多 2 次内必过。否则报 validation_failed。</p>
</section>
<section>
<h2>⑨ 失败模式与降级</h2>
<table class="dense">
<thead><tr><th>场景</th><th>检测</th><th>降级</th></tr></thead>
<tbody>
<tr><td>试图写 ../别的 unit/</td><td>Write 工具沙箱拒绝</td><td>Coder 收 error,换路径</td></tr>
<tr><td>Bash inline JSON</td><td>jsonGuard 拦截</td><td>提示参考 CLAUDE.md L91-99</td></tr>
<tr><td>contract.json hash 与 SDD 不匹配</td><td>contract_bridge</td><td>视为 fail;Coder 必须改 code 让契约对齐</td></tr>
<tr><td>反复同样错误 ≥ 3 次</td><td>retry_budget 累计</td><td>UnitRegistry.block + SSE 求人</td></tr>
<tr><td>code/ 文件 parse 失败</td><td>self-check 步骤</td><td>retry 一次重写</td></tr>
<tr><td>retry 模式 coder.log 缺反思字段</td><td>appendCoderLog 内置校验</td><td>抛 error,Coder 必须补</td></tr>
<tr><td>读取 sdd 时找不到自己的 section</td><td>cheerio grep</td><td>报 SDD 不一致,触发 L3 让 Architect 重生</td></tr>
<tr><td>memory 注入太多挤爆 prompt</td><td>LoopController 控制 top 5</td><td>—</td></tr>
<tr><td>npm install 超时</td><td>Bash 工具超时(10min)</td><td>retry;持续失败标 infra_flake</td></tr>
</tbody>
</table>
</section>
<section>
<h2>⑩ 与其他 Agent 的握手摘要</h2>
<table class="dense">
<thead><tr><th>对方</th><th>Coder 给的</th><th>Coder 收的</th></tr></thead>
<tbody>
<tr><td><b>Architect</b></td><td>(无)</td><td>spec.json + sdd section</td></tr>
<tr><td><b>上游 Unit Coder</b></td><td>(无)</td><td>contract.json(只读)</td></tr>
<tr><td><b>Tester</b></td><td>code/** + contract.json</td><td>retry 时 failures + hint</td></tr>
<tr><td><b>下游 Unit Coder</b></td><td>contract.json</td><td>(无)</td></tr>
<tr><td><b>Integrator</b></td><td>code/** (运行时进程)</td><td>(无)</td></tr>
<tr><td><b>BugTriager</b></td><td>code/** + contract.json + coder.log (只读)</td><td>(无)</td></tr>
<tr><td><b>LoopController</b></td><td>CoderOutput JSON</td><td>CoderInput · history (retry)</td></tr>
<tr><td><b>memory/devloop/coder/</b></td><td>新 .md</td><td>启动注入</td></tr>
</tbody>
</table>
</section>
<section>
<h2>⑪ 实战验证命令</h2>
<pre class="code"><span class="c"># 前置: Architect 已跑通,units.json 含 todo-be unit, sdd/ 含 todo-be section</span>
<span class="c"># 1. 注册模板</span>
<span class="c"># system/agents/devloop-coder/prompt.md ← 本页 §2.2</span>
<span class="c"># system/agents/_registry.json ← 加 'devloop-coder'</span>
<span class="c"># 2. 准备输入</span>
echo <span class="s">'{"pid":"p-test001","unit_id":"todo-be","mode":"implement","call_id":"call-coder-1","company_id":"c-test"}'</span> > /tmp/coder-impl.json
<span class="c"># 3. 调 Coder (implement)</span>
curl -X POST http://localhost:3010/api/devloop/_test/run-agent/coder \
-H <span class="s">"Content-Type: application/json"</span> \
-d @/tmp/coder-impl.json
<span class="c"># 4. 期望:30-60 秒内</span>
<span class="c"># data/companies/c-test/projects/p-test001/units/todo-be/</span>
<span class="c"># ├── code/server.js, code/service.js</span>
<span class="c"># ├── contract.json (hash 与 units.json 一致)</span>
<span class="c"># └── coder.log (1 个 --- block)</span>
<span class="c"># 5. 三方验证</span>
node -e <span class="s">"console.log(require('./server/services/agent-tools/contract-bridge').verifyContractBridge('p-test001', 'todo-be'))"</span>
<span class="c"># 期望: { ok: true, hash: 'sha256:...' }</span>
node -e <span class="s">"console.log(require('./server/services/agent-tools/sandbox-check').scanSandbox({pid:'p-test001',unitId:'todo-be',since:Date.now()-300000}))"</span>
<span class="c"># 期望: { ok: true, violations: [] }</span>
node --check data/companies/c-test/projects/p-test001/units/todo-be/code/server.js
<span class="c"># 期望: 0 退出码</span>
<span class="c"># 6. 模拟 retry (假装 Tester 已经红了)</span>
echo <span class="s">'{"pid":"p-test001","unit_id":"todo-be","mode":"retry","history":[{"attempt":1,"my_decision":"...","tester_said":[{"test":"x","expected":400,"got":500,"stack":"TypeError..."}]}],"reflect_hint":"req.body 可能 undefined","call_id":"call-coder-2","company_id":"c-test"}'</span> > /tmp/coder-retry.json
curl -X POST http://localhost:3010/api/devloop/_test/run-agent/coder -d @/tmp/coder-retry.json
<span class="c"># 期望: coder.log 多一个 block,含 last_failure / this_fix / rationale 字段</span>
<span class="c"># code/server.js 被 Edit 过 (mtime > 上次)</span>
<span class="c"># contract_hash 不变 (除非真的契约改了)</span></pre>
<div class="callout ok">
<b>这一组全过 = Coder skill 验证通过。</b>下一步 Tester Agent 跑同 Unit 检测能不能让代码红/绿,关上 L1 反思闭环。
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