步驟6 執行統計回寫：每顆零件跑完回寫 success_rate（task 29，design.md「執行統計設計」）

- registry 新增 POST /analytics/record：ANALYTICS_KV 計數器（stats:{hash_id}:{version}）
  為唯一真相源，衍生值（success_rate/avg_duration_ms/call_count）回填 comp: 記錄
  ——查詢讀取端讀哪就寫哪，不開第二真相源。KV 無 CAS，誠實標註非原子。
- cypher-executor execution-evaluator 從 stub 改真實作：執行收尾（/cypher/execute
  成功與 ExecutionError 路徑＋webhook 路徑）對 trace 裡每顆 Component 節點
  fire-and-forget 回寫，waitUntil 包、不增加執行同步延遲（仿 recordRecipeStats 慣例）。
  成敗判定＝trace error 或 output.success===false（makeHttpRunner 非 2xx 不 throw）。
- registry 位置沿 search-nodes 慣例：REGISTRY_BASE_URL 覆蓋，未設走 wasmWorkerUrl。
- 新增單測 13 個全綠；本地雙 wrangler dev 端到端實測：http_request 跑 5 次
  （3 成功＋2 失敗）→ success_rate 1→0.6、call_count 0→5，/cypher/search 同步可見。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

registry/src/actions/queryComponents.ts

@@ -137,7 +137,8 @@ export async function searchComponents(
 
 // ── 內部工具函數 ──────────────────────────────────────────────────────────────
 
-function computeScore(v: Record<string, unknown>): number {
+// export：recordAnalytics 選「最優版本」要與 getComponent 同判準（單一評分真相）
+export function computeScore(v: Record<string, unknown>): number {
   const successRate = parseFloat(String(v.success_rate ?? '1'));
   const avgDuration = parseFloat(String(v.avg_duration_ms ?? '10'));
   const callCount = parseInt(String(v.call_count ?? '0'), 10);

registry/src/actions/recordAnalytics.ts

@@ -0,0 +1,128 @@
+// recordAnalytics — 零件執行結果回寫（POST /analytics/record 的實作）
+// SDD: system-dev/docs/3-specs/arcrun-core-mvp/design.md「執行統計設計」
+//
+// 真相源＝ANALYTICS_KV 計數器（key = stats:{hash_id}:{version}，見 src/types.ts 註記）：
+//   { total_runs, success_runs, total_ms }
+// 讀取端（queryComponents / GET /components/*）讀的是 comp: 記錄上的
+// success_rate / avg_duration_ms / call_count 欄位——所以每次記錄後把衍生值
+// 回填 comp: 記錄（唯一寫入者是本函式，衍生值不是第二個真相源）。
+//
+// 尺度註記：design.md:499 寫 success_rate = success_runs / total_runs * 100（百分比顯示）。
+// 本 repo comp: 記錄的 success_rate 既有尺度是 0..1（預設 1，computeScore 直接相乘），
+// 為不破壞既有讀取端與未測零件的預設值，落庫維持 0..1；*100 只是等價的顯示換算。
+//
+// 誠實限制：CF KV 無 CAS/原子遞增，read-modify-write 併發下偶有丟計數；
+// 統計用途可接受（design 的「樂觀鎖」在 KV 上做不到，不假裝做到了）。
+
+import type { Bindings } from '../types';
+import { computeScore } from './queryComponents';
+
+export interface AnalyticsRecordInput {
+  canonical_id: string;        // 也接受 cmp_xxxxxxxx hash_id
+  version?: string;            // 不給 → 記到查詢會回的最優版本（getComponent 同判準）
+  success: boolean;
+  duration_ms: number;
+}
+
+export interface AnalyticsRecordResult {
+  ok: boolean;
+  error?: string;
+  canonical_id?: string;
+  version?: string;
+  total_runs?: number;
+  success_runs?: number;
+  success_rate?: number;       // 0..1，與 comp: 記錄同尺度
+  avg_duration_ms?: number;
+}
+
+interface StatsCounters {
+  total_runs: number;
+  success_runs: number;
+  total_ms: number;
+}
+
+export async function recordAnalytics(
+  input: AnalyticsRecordInput,
+  env: Bindings,
+): Promise<AnalyticsRecordResult> {
+  // 1. 解析 hash_id（與 queryComponents.resolveHashId 同規則）
+  const hashId = input.canonical_id.startsWith('cmp_')
+    ? input.canonical_id
+    : await env.SUBMISSIONS_KV.get(`idx:${input.canonical_id}`);
+  if (!hashId) {
+    return { ok: false, error: `零件 ${input.canonical_id} 不在索引` };
+  }
+
+  // 2. 找目標版本記錄：指定 version 就用它；沒指定 → 最優版本（與 getComponent 同判準：score 最高）
+  const list = await env.SUBMISSIONS_KV.list({ prefix: `comp:${hashId}:` });
+  let targetKey: string | null = null;
+  let targetRecord: Record<string, unknown> | null = null;
+  let bestScore = -Infinity;
+
+  for (const key of list.keys) {
+    const raw = await env.SUBMISSIONS_KV.get(key.name);
+    if (!raw) continue;
+    let v: Record<string, unknown>;
+    try { v = JSON.parse(raw); } catch { continue; }
+    if (v.status === 'tombstone') continue;
+
+    if (input.version) {
+      if (String(v.version) === input.version) {
+        targetKey = key.name;
+        targetRecord = v;
+        break;
+      }
+      continue;
+    }
+    const score = computeScore(v);
+    if (score > bestScore) {
+      bestScore = score;
+      targetKey = key.name;
+      targetRecord = v;
+    }
+  }
+
+  if (!targetKey || !targetRecord) {
+    return { ok: false, error: `零件 ${input.canonical_id} 無可用版本記錄` };
+  }
+
+  const version = String(targetRecord.version ?? 'v1');
+  const canonicalId = String(targetRecord.canonical_id ?? input.canonical_id);
+
+  // 3. 更新計數器（真相源，ANALYTICS_KV stats:{hash_id}:{version}）
+  const statsKey = `stats:${hashId}:${version}`;
+  let counters: StatsCounters = { total_runs: 0, success_runs: 0, total_ms: 0 };
+  const rawStats = await env.ANALYTICS_KV.get(statsKey);
+  if (rawStats) {
+    try {
+      const parsed = JSON.parse(rawStats) as Partial<StatsCounters>;
+      counters = {
+        total_runs: Number(parsed.total_runs) || 0,
+        success_runs: Number(parsed.success_runs) || 0,
+        total_ms: Number(parsed.total_ms) || 0,
+      };
+    } catch { /* 損毀計數器 → 重新起算 */ }
+  }
+  counters.total_runs += 1;
+  counters.success_runs += input.success ? 1 : 0;
+  counters.total_ms += Math.max(0, Number(input.duration_ms) || 0);
+  await env.ANALYTICS_KV.put(statsKey, JSON.stringify(counters));
+
+  // 4. 衍生值回填 comp: 記錄（讀取端讀的地方）
+  const successRate = counters.success_runs / counters.total_runs;
+  const avgDurationMs = Math.round(counters.total_ms / counters.total_runs);
+  targetRecord.success_rate = successRate;
+  targetRecord.avg_duration_ms = avgDurationMs;
+  targetRecord.call_count = counters.total_runs;
+  await env.SUBMISSIONS_KV.put(targetKey, JSON.stringify(targetRecord));
+
+  return {
+    ok: true,
+    canonical_id: canonicalId,
+    version,
+    total_runs: counters.total_runs,
+    success_runs: counters.success_runs,
+    success_rate: successRate,
+    avg_duration_ms: avgDurationMs,
+  };
+}

registry/src/index.ts

@@ -9,6 +9,7 @@ import validateContractRoute from './routes/validateContract';
 import componentsRoute from './routes/components';
 import queryRoute from './routes/query';
 import initRoute from './routes/init';
+import analyticsRoute from './routes/analytics';
 
 const app = new Hono<{ Bindings: Bindings }>();
 app.use('*', cors());
@@ -25,4 +26,7 @@ app.route('/components', componentsRoute); // POST /components
 // === 初始化端點（建立 tpl-component template）===
 app.route('/init', initRoute);
 
+// === 執行統計回寫（cypher-executor 執行收尾 fire-and-forget 打進來）===
+app.route('/analytics', analyticsRoute); // POST /analytics/record
+
 export default app;

registry/src/routes/analytics.ts

@@ -0,0 +1,37 @@
+// POST /analytics/record — 零件執行結果回寫端點
+// SDD: system-dev/docs/3-specs/arcrun-core-mvp/design.md「執行統計設計」
+// 呼叫方：cypher-executor 執行收尾（fire-and-forget，統計失敗不影響執行）
+
+import { Hono } from 'hono';
+import type { Bindings } from '../types';
+import { recordAnalytics } from '../actions/recordAnalytics';
+
+const app = new Hono<{ Bindings: Bindings }>();
+
+app.post('/record', async c => {
+  const body = await c.req.json().catch(() => null) as {
+    canonical_id?: unknown;
+    version?: unknown;
+    success?: unknown;
+    duration_ms?: unknown;
+  } | null;
+
+  if (!body || typeof body.canonical_id !== 'string' || body.canonical_id.trim() === '') {
+    return c.json({ ok: false, error: 'canonical_id 必填' }, 400);
+  }
+  if (typeof body.success !== 'boolean') {
+    return c.json({ ok: false, error: 'success 必須為 boolean' }, 400);
+  }
+
+  const result = await recordAnalytics({
+    canonical_id: body.canonical_id.trim(),
+    version: typeof body.version === 'string' && body.version !== '' ? body.version : undefined,
+    success: body.success,
+    duration_ms: typeof body.duration_ms === 'number' ? body.duration_ms : 0,
+  }, c.env);
+
+  if (!result.ok) return c.json(result, 404);
+  return c.json(result);
+});
+
+export default app;