MCP SDK: Add pre-commit/post-checkout/post-merge hooks

lefthook.yml

@@ -0,0 +1,51 @@
+# lefthook.yml
+# Configuration reference: https://lefthook.dev/configuration/
+
+assert_lefthook_installed: true
+
+output:
+    - meta # Print lefthook version
+    - summary # Print summary block (successful and failed steps)
+    - empty_summary # Print summary heading when there are no steps to run
+    - success # Print successful steps
+    - failure # Print failed steps printing
+    - execution # Print any execution logs (but prints if the execution failed)
+    - execution_out # Print execution output (but still prints failed commands output)
+    - execution_info # Print `EXECUTE > ...` logging
+    - skips # Print "skip" (i.e. no files matched)
+
+pre-push:
+    follow: true
+    parallel: true
+    jobs:
+        - name: 'Lint'
+          run: npx --no-install eslint --fix "{staged_files}"
+          glob:
+              - '*.ts'
+              - '*.js'
+              - '*.tsx'
+              - '*.jsx'
+          stage_fixed: true
+
+        - name: 'Code Formatting'
+          run: npx --no-install prettier --write --ignore-unknown "{staged_files}"
+          stage_fixed: true
+
+        - name: 'Build'
+          run: npm run build
+          stage_fixed: true
+
+        - name: 'Test'
+          run: npm run fetch:spec-types && npx --no-install jest --passWithNoTests "{staged_files}"
+          glob: '*.{ts,js,json}'
+          stage_fixed: true
+
+post-checkout:
+    jobs:
+        - name: 'Install Dependencies'
+          run: npm install
+
+post-merge:
+    jobs:
+        - name: 'Install Dependencies'
+          run: npm install

package.json

@@ -57,6 +57,7 @@
         "prepack": "npm run build:esm && npm run build:cjs",
         "lint": "eslint src/ && prettier --check .",
         "lint:fix": "eslint src/ --fix && prettier --write .",
+        "prepare": "npx --no-install lefthook install",
         "test": "npm run fetch:spec-types && jest",
         "start": "npm run server",
         "server": "tsx watch --clear-screen=false src/cli.ts server",
@@ -91,8 +92,9 @@
         "@types/ws": "^8.5.12",
         "eslint": "^9.8.0",
         "eslint-config-prettier": "^10.1.8",
-        "prettier": "3.6.2",
         "jest": "^29.7.0",
+        "lefthook": "^1.13.6",
+        "prettier": "3.6.2",
         "supertest": "^7.0.0",
         "ts-jest": "^29.2.4",
         "tsx": "^4.16.5",