diff --git a/api-report/apps/api/src/modules/loop-engine/port.d.ts b/api-report/apps/api/src/modules/loop-engine/port.d.ts
index ea62b0b..13f8b17 100644
--- a/api-report/apps/api/src/modules/loop-engine/port.d.ts
+++ b/api-report/apps/api/src/modules/loop-engine/port.d.ts
@@ -389,3 +389,25 @@ export type TaskContext = {
      */
     machineCriteria(taskId: TaskId): Promise<ReadonlySet<string>>;
 };
+/**
+ * **一次结构化 AI 调用** —— 配方的 `analyze` 动词(spec §5.2)。
+ *
+ * 与 `AgentPort` 的分工是死的:`AgentPort` 是「问它下一步干什么」,它能调工具、能写台账;
+ * 这一件**只是一个纯函数**:系统组装好入参,它出一份结构化判断,系统把结果落表。
+ * **不给工具、不给记忆、不多轮。** 出参不合 schema 由实现方就地重问一次,再不成就抛。
+ */
+export type AnalyzeGateway = {
+    run(input: {
+        readonly taskId: TaskId;
+        /** 活动声明过的模型名 */
+        readonly model: string;
+        readonly instruction: string;
+        /** 系统组装好的入参 —— 一行一条 */
+        readonly payload: readonly unknown[];
+        readonly outputSchema: Readonly<Record<string, unknown>>;
+        /** 归因:`<步名>#<第几笔>` */
+        readonly label: string;
+    }): Promise<{
+        readonly object: Readonly<Record<string, unknown>>;
+    }>;
+};
diff --git a/apps/api/src/app/wiring/engines.ts b/apps/api/src/app/wiring/engines.ts
index 663aa98..038039d 100644
--- a/apps/api/src/app/wiring/engines.ts
+++ b/apps/api/src/app/wiring/engines.ts
@@ -2289,6 +2289,7 @@ export function wireEngines(deps: EngineWiringDeps): EngineWiring {
     },
     tasks: taskContext,
     clock,
+    analyze: { run: () => Promise.reject(new Error('analyze 尚未装配(Task 5)')) },
   });
 
   /**
diff --git a/apps/api/src/modules/loop-engine/CONTRACT.md b/apps/api/src/modules/loop-engine/CONTRACT.md
index af0dca5..d698af5 100644
--- a/apps/api/src/modules/loop-engine/CONTRACT.md
+++ b/apps/api/src/modules/loop-engine/CONTRACT.md
@@ -12,7 +12,7 @@
   - 错误:`CmmnParseError` `IllegalTransitionError` `ForbiddenTerminalError`
           `AutomaticOnWorldTouchingError`
   - 端口类型:`LoopStateStore` `Sfeel` `TaskDataGateway`(含 `writable` 授权面)`AgentPort` `ToolGateway`
-          `CardGateway` `ListenerRegistrar` `MemoryRecorder` `TaskContext`
+          `CardGateway` `ListenerRegistrar` `MemoryRecorder` `TaskContext` `AnalyzeGateway`
   - 用例工厂:`createTurnRunner(deps): LoopEngineService`
   - 纯函数:`parseCmmn` `parseXml` `publishEnabled` `navigate` `evaluateCriterion`
           `transitionItem` `occur` `achieveMilestones` `reenter` `autoCompleteReady` `canTransitionItem`
diff --git a/apps/api/src/modules/loop-engine/__tests__/auto-runner.test.ts b/apps/api/src/modules/loop-engine/__tests__/auto-runner.test.ts
new file mode 100644
index 0000000..e1badee
--- /dev/null
+++ b/apps/api/src/modules/loop-engine/__tests__/auto-runner.test.ts
@@ -0,0 +1,149 @@
+import { describe, expect, it } from 'vitest';
+import type { AutoRecipe } from '@contracts';
+import { taskIdSchema, staffIdSchema } from '@contracts';
+import { createAutoRunner } from '../internal/usecase/auto-runner.ts';
+
+const TASK = taskIdSchema.parse('11111111-1111-4111-8111-111111111111');
+const OWNER = staffIdSchema.parse('22222222-2222-4222-8222-222222222222');
+
+/** 假端口:一个内存草稿层 + 一本台账声明。**不是 mock 框架,是手写的依赖注入替身。** */
+function harness(seed: Record<string, unknown> = {}) {
+  const drafts = new Map<string, { domain: string; object: string; key: Record<string, string>; patch: Record<string, unknown> }>();
+  const notes: string[] = [];
+  const view = (): Record<string, unknown> => {
+    const mine: Record<string, unknown[]> = {};
+    for (const d of drafts.values()) (mine[`mine:${d.domain}.${d.object}`] ??= []).push({ ...d.key, ...d.patch });
+    return { ...seed, ...mine };
+  };
+  const deps = {
+    data: {
+      view: () => Promise.resolve(view()),
+      writable: () =>
+        Promise.resolve([
+          { domain: 'sub_eval', object: 'part', label: '本单两颗料', keys: ['eval_ref', 'internal_pn'], fields: [] },
+          { domain: 'parts', object: 'parameter', label: '参数', keys: ['internal_pn', 'param_name'], fields: [] },
+        ]),
+      draftWrite: (i: { domain: string; object: string; key: Record<string, string>; patch: Record<string, unknown> }) => {
+        const id = `${i.domain}.${i.object}|${Object.values(i.key).join('|')}`;
+        const before = JSON.stringify(drafts.get(id)?.patch ?? null);
+        drafts.set(id, { domain: i.domain, object: i.object, key: i.key, patch: i.patch });
+        return Promise.resolve({ changed: before !== JSON.stringify(i.patch) });
+      },
+      draftDrop: (i: { domain: string; object: string; key: Record<string, string> }) => {
+        const id = `${i.domain}.${i.object}|${Object.values(i.key).join('|')}`;
+        return Promise.resolve({ dropped: drafts.delete(id) });
+      },
+    },
+    cards: {
+      issue: () => Promise.resolve({ id: 'card-1' }),
+      decide: () => Promise.resolve({ id: 'card-2' }),
+      entry: () => Promise.resolve({ id: 'card-3' }),
+      ask: () => Promise.resolve({ id: 'card-4' }),
+      unanswered: () => Promise.resolve([]),
+    },
+    memory: { append: (m: { title: string }) => { notes.push(m.title); return Promise.resolve(); } },
+    analyze: { run: () => Promise.reject(new Error('本用例不该调 analyze')) },
+    sfeel: {
+      condition: (expr: string, scope: Readonly<Record<string, unknown>>) => {
+        if (expr === 'never') return false;
+        if (expr === 'always') return true;
+        if (expr === 'found_ref != ""') return String(scope['found_ref'] ?? '') !== '';
+        throw new Error(`没教过这句:${expr}`);
+      },
+      expression: () => undefined,
+      unaryTest: () => false,
+    },
+  };
+  const ctx = { taskId: TASK, stepId: 'S1', ownerId: OWNER, humanCallCap: 8, quiet: false, carded: false };
+  // 假端口只实现用得到的那几个方法,形状对不上 AutoRunnerDeps 的全貌 —— 测试文件里 `as never` 是既有做法
+  return { runner: createAutoRunner(deps as never), drafts, notes, ctx };
+}
+
+describe('配方执行器', () => {
+  it('project once:写一行,主键与其余列分开', async () => {
+    const { runner, drafts, ctx } = harness({ pn: 'LM2596S-5.0' });
+    const recipe: AutoRecipe = {
+      let: { evalRef: 'W05-1' },
+      do: [
+        {
+          kind: 'project',
+          into: 'sub_eval.part',
+          from: { once: true },
+          fields: { eval_ref: { in: 'evalRef' }, internal_pn: { in: 'pn' }, role: 'original' },
+        },
+      ],
+    };
+    const out = await runner.run(recipe, ctx);
+    expect(out.wrote).toBe(1);
+    expect([...drafts.values()][0]).toEqual({
+      domain: 'sub_eval',
+      object: 'part',
+      key: { eval_ref: 'W05-1', internal_pn: 'LM2596S-5.0' },
+      patch: { role: 'original' },
+    });
+  });
+
+  it('主键算不出来的那一行**先不写** —— 空主键写下去就是一行永远对不上的垃圾', async () => {
+    const { runner, drafts, ctx } = harness({});
+    const out = await runner.run(
+      { do: [{ kind: 'project', into: 'sub_eval.part', from: { once: true }, fields: { eval_ref: 'W05-1', internal_pn: { in: 'nope' }, role: 'x' } }] },
+      ctx,
+    );
+    expect(out.wrote).toBe(0);
+    expect(drafts.size).toBe(0);
+  });
+
+  it('when 为假就跳过这一笔', async () => {
+    const { runner, drafts, ctx } = harness({});
+    await runner.run({ do: [{ kind: 'project', when: 'never', into: 'sub_eval.part', from: { once: true }, fields: { eval_ref: 'a', internal_pn: 'b' } }] }, ctx);
+    expect(drafts.size).toBe(0);
+  });
+
+  it('**每一笔之前刷读数**:第二笔 each 得看得见第一笔刚写下的行', async () => {
+    const { runner, drafts, ctx } = harness({});
+    await runner.run(
+      {
+        do: [
+          { kind: 'project', into: 'sub_eval.part', from: { rows: [{ pn: 'A' }, { pn: 'B' }] }, fields: { eval_ref: 'W05-1', internal_pn: { col: 'pn' } } },
+          { kind: 'project', into: 'parts.parameter', from: { each: 'mine:sub_eval.part' }, fields: { internal_pn: { col: 'internal_pn' }, param_name: '输入电压范围', param_value: '' } },
+        ],
+      },
+      ctx,
+    );
+    const params = [...drafts.values()].filter((d) => d.object === 'parameter');
+    expect(params.map((p) => p.key['internal_pn']).sort()).toEqual(['A', 'B']);
+  });
+
+  it('值没变的写是空转:**不留痕、不计数**(配方不是模型,原地打转不必被看见)', async () => {
+    const { runner, ctx } = harness({});
+    const recipe: AutoRecipe = { do: [{ kind: 'project', into: 'sub_eval.part', from: { once: true }, fields: { eval_ref: 'a', internal_pn: 'b', role: 'original' } }] };
+    await runner.run(recipe, ctx);
+    const second = await runner.run(recipe, ctx);
+    expect(second.wrote).toBe(0);
+  });
+
+  it('prune:这一笔没投影出来的行,从草稿层撤掉', async () => {
+    const { runner, drafts, ctx } = harness({});
+    await runner.run({ do: [{ kind: 'project', into: 'sub_eval.part', from: { rows: [{ pn: 'A' }, { pn: 'B' }] }, fields: { eval_ref: 'W05-1', internal_pn: { col: 'pn' } } }] }, ctx);
+    expect(drafts.size).toBe(2);
+    const out = await runner.run(
+      { do: [{ kind: 'project', into: 'sub_eval.part', prune: true, from: { rows: [{ pn: 'A' }] }, fields: { eval_ref: 'W05-1', internal_pn: { col: 'pn' } } }] },
+      ctx,
+    );
+    expect(out.dropped).toBe(1);
+    expect([...drafts.values()].map((d) => d.key['internal_pn'])).toEqual(['A']);
+  });
+
+  it('say:进工作日志,归系统', async () => {
+    const { runner, notes, ctx } = harness({ n: 2 });
+    await runner.run({ do: [{ kind: 'say', text: { cat: ['已核对 ', { in: 'n' }, ' 颗料'] } }] }, ctx);
+    expect(notes).toContain('已核对 2 颗料');
+  });
+
+  it('地址不在台账声明里 → 当场交人,不重试', async () => {
+    const { runner, ctx } = harness({});
+    const out = await runner.run({ do: [{ kind: 'project', into: 'nope.nope', from: { once: true }, fields: { a: 'b' } }] }, ctx);
+    expect(out.failedAt?.index).toBe(0);
+    expect(out.failedAt?.message).toContain('nope.nope');
+  });
+});
diff --git a/apps/api/src/modules/loop-engine/__tests__/turn-runner-acceptance.test.ts b/apps/api/src/modules/loop-engine/__tests__/turn-runner-acceptance.test.ts
index dfd583f..b0407bc 100644
--- a/apps/api/src/modules/loop-engine/__tests__/turn-runner-acceptance.test.ts
+++ b/apps/api/src/modules/loop-engine/__tests__/turn-runner-acceptance.test.ts
@@ -139,6 +139,7 @@ function harness(
         } as never;
       },
     } as never,
+    analyze: { run: async () => ({ object: {} }) } as never,
     tools: {
       invoke: async (input: { tool: string }) => {
         toolCalls.push(input.tool);
diff --git a/apps/api/src/modules/loop-engine/internal/usecase/auto-runner.ts b/apps/api/src/modules/loop-engine/internal/usecase/auto-runner.ts
new file mode 100644
index 0000000..10b5088
--- /dev/null
+++ b/apps/api/src/modules/loop-engine/internal/usecase/auto-runner.ts
@@ -0,0 +1,178 @@
+/**
+ * 配方执行器 —— 逐笔执行 `PlanStep.auto`(spec §5.1)。
+ *
+ * 三条硬规矩:
+ *   ① **每一笔之前刷读数**:后一笔常常要数前一笔刚写下的行。不刷新就恒为 0 ——
+ *      推荐等级会永远算成「全 MATCH」,而屏上明明摆着两条不符。
+ *   ② **幂等**:`draftWrite` 同 PK 覆盖,值没变**静默跳过**(不留痕、不计数)——
+ *      「写了等于没写」那条判据是拦模型空转的,配方不是模型;
+ *      发卡先看 `carded`(worldTouched),发过就不再发。
+ *   ③ **出错 = 交人,不重试、不退回模型**:配方抛错是活动包的 bug。
+ *      退回模型就是让它去凑,那正是这套机制要消灭的东西。
+ */
+import type { AutoAction, AutoRecipe, StaffId, TaskId } from '@contracts';
+import { evalExpr, evalText, rowsAt, type ExprCtx } from '../domain/auto-expr.ts';
+import { expandSource } from '../domain/auto-source.ts';
+import type { AnalyzeGateway, CardGateway, MemoryRecorder, Sfeel, TaskDataGateway } from '../../port.ts';
+
+export class AutoRecipeError extends Error {
+  constructor(
+    readonly actionIndex: number,
+    message: string,
+  ) {
+    super(message);
+    this.name = 'AutoRecipeError';
+  }
+}
+
+export type AutoRunnerDeps = {
+  readonly data: TaskDataGateway;
+  readonly cards: CardGateway;
+  readonly memory: MemoryRecorder;
+  readonly analyze: AnalyzeGateway;
+  readonly sfeel: Sfeel;
+};
+
+export type AutoContext = {
+  readonly taskId: TaskId;
+  readonly stepId: string;
+  readonly ownerId: StaffId;
+  readonly humanCallCap: number;
+  /** 有未答的卡在场:**只跑 project / say** —— 只算、只写,不发新卡、不 submit、不 analyze */
+  readonly quiet: boolean;
+  /** 这一步已经发过卡(worldTouched) */
+  readonly carded: boolean;
+};
+
+export type AutoOutcome = {
+  readonly wrote: number;
+  readonly dropped: number;
+  readonly issuedCardId?: string;
+  readonly submit?: { readonly rationale: string };
+  readonly failedAt?: { readonly index: number; readonly message: string };
+};
+
+const keyText = (key: Readonly<Record<string, string>>): string => Object.values(key).join('|');
+
+export function createAutoRunner(deps: AutoRunnerDeps): {
+  run(recipe: AutoRecipe, ctx: AutoContext): Promise<AutoOutcome>;
+} {
+  return {
+    async run(recipe, ctx) {
+      const writable = await deps.data.writable(ctx.taskId);
+      const results: Record<string, unknown[]> = {};
+      let scope: Record<string, unknown> = { ...(await deps.data.view(ctx.taskId)), ...results };
+      let dirty = false;
+      let wrote = 0;
+      let dropped = 0;
+      let issuedCardId: string | undefined;
+      let submit: { rationale: string } | undefined;
+
+      const condition = deps.sfeel.condition;
+      const lets: Record<string, unknown> = {};
+      for (const [name, expr] of Object.entries(recipe.let ?? {})) {
+        lets[name] = evalExpr(expr, { scope, lets, condition });
+      }
+
+      async function runAction(
+        action: AutoAction,
+        index: number,
+        base: ExprCtx,
+        context: AutoContext,
+      ): Promise<{ wrote: number; dropped: number; cardId?: string; submit?: { rationale: string }; stop?: boolean }> {
+        if (action.kind === 'say') {
+          await deps.memory.append({
+            taskId: context.taskId,
+            kind: 'result',
+            title: evalText(action.text, base),
+            detail: { auto: `${context.stepId}#${index + 1}` },
+          });
+          return { wrote: 0, dropped: 0 };
+        }
+
+        if (action.kind === 'project') {
+          const [domain, object] = action.into.split('.');
+          const decl = writable.find((w) => w.domain === domain && w.object === object);
+          if (decl === undefined) {
+            throw new AutoRecipeError(index, `台账地址不在本活动的声明里:${action.into}(写的授权面是台账声明)`);
+          }
+          const before = rowsAt(base.scope, `mine:${action.into}`);
+          const kept = new Set<string>();
+          let localWrote = 0;
+          for (const { row, outer } of expandSource(action.from, base)) {
+            const computed: Record<string, unknown> = {};
+            for (const [name, expr] of Object.entries(action.fields)) {
+              computed[name] = evalExpr(expr, { ...base, row, ...(outer === undefined ? {} : { outer }), computed });
+            }
+            const key: Record<string, string> = {};
+            for (const column of decl.keys) key[column] = String(computed[column] ?? '');
+            /* 主键算不出来就先不写 —— 空主键写下去是一行永远对不上的垃圾 */
+            if (decl.keys.some((column) => key[column] === '')) continue;
+            const patch: Record<string, unknown> = {};
+            for (const [name, value] of Object.entries(computed)) if (!decl.keys.includes(name)) patch[name] = value;
+            const { changed } = await deps.data.draftWrite({ taskId: context.taskId, domain: decl.domain, object: decl.object, key, patch });
+            if (changed) localWrote += 1;
+            kept.add(keyText(key));
+          }
+          let localDropped = 0;
+          if (action.prune === true) {
+            for (const stale of before) {
+              const key: Record<string, string> = {};
+              for (const column of decl.keys) key[column] = String(stale[column] ?? '');
+              if (kept.has(keyText(key))) continue;
+              const { dropped: gone } = await deps.data.draftDrop({ taskId: context.taskId, domain: decl.domain, object: decl.object, key });
+              if (gone) localDropped += 1;
+            }
+          }
+          if (localWrote > 0 || localDropped > 0) {
+            await deps.memory.append({
+              taskId: context.taskId,
+              kind: 'result',
+              title: `${decl.label}:写下 ${localWrote} 行${localDropped === 0 ? '' : `,撤掉 ${localDropped} 行`}`,
+              detail: { auto: `${context.stepId}#${index + 1}`, internal: true, ledger: action.into },
+            });
+          }
+          return { wrote: localWrote, dropped: localDropped };
+        }
+
+        throw new AutoRecipeError(index, `动词尚未实现:${action.kind}`);
+      }
+
+      for (const [index, action] of recipe.do.entries()) {
+        try {
+          if (dirty) {
+            scope = { ...(await deps.data.view(ctx.taskId)), ...results };
+            dirty = false;
+          }
+          const base: ExprCtx = { scope, lets, condition };
+          if (action.when !== undefined && !condition(action.when, { ...scope, ...lets })) continue;
+          /* 有卡在等人交回:只算、只写 —— 不发新卡、不 submit、不 analyze */
+          if (ctx.quiet && action.kind !== 'project' && action.kind !== 'say') continue;
+
+          const done = await runAction(action, index, base, ctx);
+          wrote += done.wrote;
+          dropped += done.dropped;
+          if (done.wrote > 0 || done.dropped > 0) dirty = true;
+          if (done.cardId !== undefined) issuedCardId = done.cardId;
+          if (done.submit !== undefined) submit = done.submit;
+          if (done.stop) break;
+        } catch (err) {
+          const message = err instanceof Error ? err.message : String(err);
+          await deps.memory.append({
+            taskId: ctx.taskId,
+            kind: 'result',
+            title: `配方第 ${index + 1} 笔办不下去:${message} —— 交给你处理`,
+            detail: { auto: `${ctx.stepId}#${index + 1}`, internal: false },
+          });
+          return { wrote, dropped, ...(issuedCardId === undefined ? {} : { issuedCardId }), failedAt: { index, message } };
+        }
+      }
+      return {
+        wrote,
+        dropped,
+        ...(issuedCardId === undefined ? {} : { issuedCardId }),
+        ...(submit === undefined ? {} : { submit }),
+      };
+    },
+  };
+}
diff --git a/apps/api/src/modules/loop-engine/internal/usecase/turn-runner.ts b/apps/api/src/modules/loop-engine/internal/usecase/turn-runner.ts
index 04db52a..af2393b 100644
--- a/apps/api/src/modules/loop-engine/internal/usecase/turn-runner.ts
+++ b/apps/api/src/modules/loop-engine/internal/usecase/turn-runner.ts
@@ -9,6 +9,7 @@ import type { AgentAction, LoopEngineService, TurnOutcome } from '../../contract
 import { ForbiddenTerminalError, TURN_ACTION_CAP } from '../../contract.ts';
 import type {
   AgentPort,
+  AnalyzeGateway,
   CardGateway,
   Clock,
   ListenerRegistrar,
@@ -53,6 +54,7 @@ export type TurnRunnerDeps = {
   readonly skills: SkillGateway;
   readonly tasks: TaskContext;
   readonly clock: Clock;
+  readonly analyze: AnalyzeGateway;
 };
 
 /**
diff --git a/apps/api/src/modules/loop-engine/port.ts b/apps/api/src/modules/loop-engine/port.ts
index 7378d4d..c4f518b 100644
--- a/apps/api/src/modules/loop-engine/port.ts
+++ b/apps/api/src/modules/loop-engine/port.ts
@@ -314,3 +314,24 @@ export type TaskContext = {
    */
   machineCriteria(taskId: TaskId): Promise<ReadonlySet<string>>;
 };
+
+/**
+ * **一次结构化 AI 调用** —— 配方的 `analyze` 动词(spec §5.2)。
+ *
+ * 与 `AgentPort` 的分工是死的:`AgentPort` 是「问它下一步干什么」,它能调工具、能写台账;
+ * 这一件**只是一个纯函数**:系统组装好入参,它出一份结构化判断,系统把结果落表。
+ * **不给工具、不给记忆、不多轮。** 出参不合 schema 由实现方就地重问一次,再不成就抛。
+ */
+export type AnalyzeGateway = {
+  run(input: {
+    readonly taskId: TaskId;
+    /** 活动声明过的模型名 */
+    readonly model: string;
+    readonly instruction: string;
+    /** 系统组装好的入参 —— 一行一条 */
+    readonly payload: readonly unknown[];
+    readonly outputSchema: Readonly<Record<string, unknown>>;
+    /** 归因:`<步名>#<第几笔>` */
+    readonly label: string;
+  }): Promise<{ readonly object: Readonly<Record<string, unknown>> }>;
+};