diff --git a/package.json b/package.json
index 962b38e1e..f9d384346 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,8 @@
     "dist",
     "scripts/postinstall.cjs",
     "scripts/run-parallel.mjs",
-    "scripts/setup-chrome-mcp.mjs"
+    "scripts/setup-chrome-mcp.mjs",
+    "scripts/install-cosknow.mjs"
   ],
   "scripts": {
     "build": "bun run build.ts",
@@ -53,7 +54,7 @@
     "test": "bun test",
     "check:unused": "knip-bun",
     "health": "bun run scripts/health-check.ts",
-    "postinstall": "node scripts/run-parallel.mjs scripts/postinstall.cjs scripts/setup-chrome-mcp.mjs",
+    "postinstall": "node scripts/run-parallel.mjs scripts/postinstall.cjs scripts/setup-chrome-mcp.mjs scripts/install-cosknow.mjs",
     "docs:dev": "npx mintlify dev",
     "typecheck": "tsc --noEmit",
     "rcs": "bun run scripts/rcs.ts"
diff --git a/scripts/install-cosknow.mjs b/scripts/install-cosknow.mjs
new file mode 100644
index 000000000..4bd5e2a86
--- /dev/null
+++ b/scripts/install-cosknow.mjs
@@ -0,0 +1,34 @@
+import { spawnSync, execSync } from 'node:child_process'
+import { join } from 'node:path'
+import { pathToFileURL } from 'node:url'
+
+// 全局安装最新版
+spawnSync('npm', ['install', '-g', '@costrict/cosknow@latest'], {
+  stdio: 'inherit',
+  shell: true,
+})
+
+// 获取全局 node_modules 路径
+let globalPrefix
+try {
+  globalPrefix = execSync('npm root -g', { encoding: 'utf8' }).trim()
+} catch {
+  console.warn('[cosknow] cannot determine global npm root, skipping')
+  process.exit(0)
+}
+
+let install
+try {
+  const mod = await import(pathToFileURL(join(globalPrefix, '@costrict', 'cosknow', 'dist', 'index.js')).href)
+  install = mod.install
+} catch {
+  console.warn('[cosknow] package not available, skipping command installation')
+  process.exit(0)
+}
+
+try {
+  await install({ target: 'claude-commands' })
+  console.log('[cosknow] commands installed to ~/.claude/commands/')
+} catch (e) {
+  console.warn('[cosknow] install failed (non-fatal):', e.message)
+}