diff --git a/scripts/kaifa-progress-sync.mjs b/scripts/kaifa-progress-sync.mjs
index 9298242a..17fed1f5 100644
--- a/scripts/kaifa-progress-sync.mjs
+++ b/scripts/kaifa-progress-sync.mjs
@@ -195,6 +195,38 @@ export function validateStatusEvidence(status, options) {
     }
 }
 
+export function buildInventoryCheck(progressSyncContext, reviewedAt = new Date().toISOString()) {
+    const currentState = progressSyncContext?.currentState
+    const modules = currentState?.modules
+    if (!Array.isArray(modules)) fail('INVENTORY_CONTEXT_MISSING_MODULES')
+    const items = modules.flatMap((module) => {
+        if (!module?.moduleId || !module?.name || !Array.isArray(module.features)) fail('INVENTORY_CONTEXT_INVALID_MODULE')
+        return module.features.map((feature) => {
+            if (!feature?.featureId || !feature?.name || !feature?.description || !feature?.status || !Number.isFinite(feature?.progressPercent)) {
+                fail(`INVENTORY_CONTEXT_INVALID_FEATURE:${module.name}/${feature?.name || 'unknown'}`)
+            }
+            return {
+                module_id: module.moduleId,
+                module_name: module.name,
+                feature_id: feature.featureId,
+                feature_name: feature.name,
+                feature_description: feature.description,
+                status: feature.status,
+                progress_percent: feature.progressPercent,
+            }
+        })
+    })
+    const catalogFeatureCount = currentState?.featureInventoryPolicy?.catalogFeatureCount
+    if (!Number.isInteger(catalogFeatureCount) || catalogFeatureCount !== items.length) fail('INVENTORY_CONTEXT_COUNT_MISMATCH')
+    return {
+        reviewed_at: reviewedAt,
+        source_inventory_complete: true,
+        source_feature_count: items.length,
+        catalog_feature_count: catalogFeatureCount,
+        items,
+    }
+}
+
 function git(repoRoot, args) {
     const result = spawnSync('git', args, { cwd: repoRoot, encoding: 'utf8', maxBuffer: 64 * 1024 * 1024 })
     if (result.status !== 0) fail(`GIT_FAILED:${args[0]}:${result.stderr.trim()}`)
@@ -464,6 +496,7 @@ export async function main(argv = process.argv.slice(2)) {
             body: JSON.stringify({
                 context: apiContext,
                 project_description: env.PROJECT_DESCRIPTION,
+                inventory_check: buildInventoryCheck(await apiRequest(apiBase, env.API_KEY, `/projects/${project.projectId}/progress-sync`)),
                 commits: [commit],
                 updates: [update],
             }),
diff --git a/tests/scripts/kaifa-progress-sync.test.mjs b/tests/scripts/kaifa-progress-sync.test.mjs
index fde6b35e..287593ed 100644
--- a/tests/scripts/kaifa-progress-sync.test.mjs
+++ b/tests/scripts/kaifa-progress-sync.test.mjs
@@ -3,6 +3,7 @@ import test from 'node:test'
 
 import {
     buildApiContext,
+    buildInventoryCheck,
     classifyCommit,
     makeFeatureCatalogKey,
     makeIdempotencyKey,
@@ -11,6 +12,41 @@ import {
     validateStatusEvidence,
 } from '../../scripts/kaifa-progress-sync.mjs'
 
+test('builds the complete inventory check from the freshly fetched catalog state', () => {
+    const context = {
+        currentState: {
+            featureInventoryPolicy: { catalogFeatureCount: 1 },
+            modules: [{
+                moduleId: 'module-1',
+                name: '生产发布与团队协作',
+                features: [{
+                    featureId: 'feature-1',
+                    name: '钉钉账号登录与绑定',
+                    description: '让现有财务账号通过钉钉完成绑定和登录。',
+                    status: 'done',
+                    progressPercent: 100,
+                }],
+            }],
+        },
+    }
+    assert.deepEqual(buildInventoryCheck(context, '2026-09-03T10:00:00.000Z'), {
+        reviewed_at: '2026-09-03T10:00:00.000Z',
+        source_inventory_complete: true,
+        source_feature_count: 1,
+        catalog_feature_count: 1,
+        items: [{
+            module_id: 'module-1',
+            module_name: '生产发布与团队协作',
+            feature_id: 'feature-1',
+            feature_name: '钉钉账号登录与绑定',
+            feature_description: '让现有财务账号通过钉钉完成绑定和登录。',
+            status: 'done',
+            progress_percent: 100,
+        }],
+    })
+    assert.throws(() => buildInventoryCheck({ currentState: { featureInventoryPolicy: { catalogFeatureCount: 1 }, modules: [] } }), /COUNT_MISMATCH/)
+})
+
 test('keeps Git author filtering separate from the board developer identity', () => {
     assert.deepEqual(buildApiContext({
         OWNER_EMAIL: '549727955@qq.com',