diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 3240de9..bd0742f 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -21,6 +21,8 @@ jobs:
       - uses: oven-sh/setup-bun@v2
         with: { bun-version: "1.3.14" }
       - run: bun install --frozen-lockfile
+      - run: bun run lint
+      - run: bun run fmt:check
       - run: bun run typecheck
       - run: bun run test
       - name: Cache GTFS feed   # fallback so a data.pid.cz outage can't block a deploy
diff --git a/.github/workflows/pr-preview.yml b/.github/workflows/pr-preview.yml
index 2ca801a..a7882e0 100644
--- a/.github/workflows/pr-preview.yml
+++ b/.github/workflows/pr-preview.yml
@@ -24,6 +24,8 @@ jobs:
       - uses: oven-sh/setup-bun@v2
         with: { bun-version: "1.3.14" }
       - run: bun install --frozen-lockfile
+      - run: bun run lint
+      - run: bun run fmt:check
       - run: bun run typecheck
       - run: bun run test
       - name: Cache GTFS feed   # fallback so a data.pid.cz outage can't block a preview
diff --git a/bun.lock b/bun.lock
index 22d1c61..b2e0480 100644
--- a/bun.lock
+++ b/bun.lock
@@ -19,6 +19,7 @@
         "@types/bun": "^1.3.14",
         "@types/node": "^24.0.0",
         "@types/ws": "^8.5.0",
+        "lefthook": "^2.1.9",
         "oxfmt": "^0.55.0",
         "oxlint": "^1.70.0",
         "typescript": "^6.0.3",
@@ -1186,6 +1187,28 @@
 
     "kubernetes-types": ["kubernetes-types@1.30.0", "", {}, "sha512-Dew1okvhM/SQcIa2rcgujNndZwU8VnSapDgdxlYoB84ZlpAD43U6KLAFqYo17ykSFGHNPrg0qry0bP+GJd9v7Q=="],
 
+    "lefthook": ["lefthook@2.1.9", "", { "optionalDependencies": { "lefthook-darwin-arm64": "2.1.9", "lefthook-darwin-x64": "2.1.9", "lefthook-freebsd-arm64": "2.1.9", "lefthook-freebsd-x64": "2.1.9", "lefthook-linux-arm64": "2.1.9", "lefthook-linux-x64": "2.1.9", "lefthook-openbsd-arm64": "2.1.9", "lefthook-openbsd-x64": "2.1.9", "lefthook-windows-arm64": "2.1.9", "lefthook-windows-x64": "2.1.9" }, "bin": { "lefthook": "bin/index.js" } }, "sha512-bwDaIOViTktE8kJLf9jP0p+H2/RDTlFFlc43Am2YgUsX22hI6Sq4RbzsrecwzY5y+MHTipOH7WsmWSEniePHWQ=="],
+
+    "lefthook-darwin-arm64": ["lefthook-darwin-arm64@2.1.9", "", { "os": "darwin", "cpu": "arm64" }, "sha512-119HryNcvr4nqn0wUIrNPgpMEPn9yMQzEcW/lezRsnb56PCJriJB92+MCySPVcWDxJnZef7o0T3jdnPNiSH7Qg=="],
+
+    "lefthook-darwin-x64": ["lefthook-darwin-x64@2.1.9", "", { "os": "darwin", "cpu": "x64" }, "sha512-dwo5Tke2XcQCM56DGHgFKBfRbJIL6xs2wZ0zG1TUVZgl4t4mQUt6LiZ4V/ZQfYHTZF9qywvXoIlR5N35qOaiVQ=="],
+
+    "lefthook-freebsd-arm64": ["lefthook-freebsd-arm64@2.1.9", "", { "os": "freebsd", "cpu": "arm64" }, "sha512-+09PVap6nl6xsaHch5JLtq7WvIR++U1Q2MzA2ai0M4uB/VP3AqrvKqHw6+9hjyKnIH+HHL83uqi77EAY+LaxLA=="],
+
+    "lefthook-freebsd-x64": ["lefthook-freebsd-x64@2.1.9", "", { "os": "freebsd", "cpu": "x64" }, "sha512-8XresjKIYpkE9ARgCtBEZgJZxAU3T4MIqzj4zNy15XRT59I1Us+QdqXTNm+pkZ41Yd2X/nxs2Pkvbq3NWWlIGw=="],
+
+    "lefthook-linux-arm64": ["lefthook-linux-arm64@2.1.9", "", { "os": "linux", "cpu": "arm64" }, "sha512-1oNIQfwrPe6rgU2KcDM3aF6+hpZDCKx1TmawQKpXUY5gVsbZ7MqX0Sk/1lnnWxqPm+kQQ5f6J2dpFWd+4xH8jg=="],
+
+    "lefthook-linux-x64": ["lefthook-linux-x64@2.1.9", "", { "os": "linux", "cpu": "x64" }, "sha512-fT+7Q+BJyGp+CslFQkNXmdFRgyVXsPHPi9NAsDX0a6QOyNnoORByAsvx6zeAKuF5rL3BBgNfho1/v2RuGxGy9w=="],
+
+    "lefthook-openbsd-arm64": ["lefthook-openbsd-arm64@2.1.9", "", { "os": "openbsd", "cpu": "arm64" }, "sha512-4bVuafBk3dddVNo0+3hMbjcJs4mqYAstxpPMmX2ufkudSTYFNIhWoqwuGVQV/SS/xdcOKJAldW4qayAzed2ysw=="],
+
+    "lefthook-openbsd-x64": ["lefthook-openbsd-x64@2.1.9", "", { "os": "openbsd", "cpu": "x64" }, "sha512-PmPoMmLP/wQQWcQ9u2YH86bTZ3UCfBsxuEmVTEyPU2U8R1qSTp5r/Gs3G8cN5Mxo91XB9oBERtF1n+xD3W6aVA=="],
+
+    "lefthook-windows-arm64": ["lefthook-windows-arm64@2.1.9", "", { "os": "win32", "cpu": "arm64" }, "sha512-KphfkBKmwBnmolyrdhIl3lrBaOyTcCgXBT2AB/9OHnEXhOLvv5uTCUkrD4YRAxXPtFKq6UvnapIeoL3GZq0bdA=="],
+
+    "lefthook-windows-x64": ["lefthook-windows-x64@2.1.9", "", { "os": "win32", "cpu": "x64" }, "sha512-2qlUtkJHZ3MyUxgV5XTEmcrIoNZA07iwaquoswAcqv/1MeBFXlD+O+koFRfrzWng2O5WYEbpJnd8tvaYnV8fTA=="],
+
     "leven": ["leven@3.1.0", "", {}, "sha512-qsda+H8jTaUaN/x5vzW2rzc+8Rw4TAQ/4KjB46IwK5VH+IlVeeeje/EoZRpiXvIqjFgK84QffqPztGI3VBLG1A=="],
 
     "libsodium": ["libsodium@0.8.4", "", {}, "sha512-lMcYaRi0zcs7tarATsQUYC7rstliIXZuoq0c6zXSgNtSNtdvBgkSegjWhpMJAXzKX3SUSwIp7+zEsob+j3LuRw=="],
diff --git a/lefthook.yml b/lefthook.yml
new file mode 100644
index 0000000..6604f60
--- /dev/null
+++ b/lefthook.yml
@@ -0,0 +1,10 @@
+# Git hooks managed by Lefthook (https://lefthook.dev).
+# Installed automatically on `bun install` via the `prepare` script.
+# Mirrors the CI static checks; bypass a run with `git commit --no-verify`.
+pre-commit:
+  parallel: true
+  jobs:
+    - name: lint
+      run: bun run lint
+    - name: format
+      run: bun run fmt:check
diff --git a/package.json b/package.json
index f5e4e54..35c4e19 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "dev": "alchemy dev",
     "deploy": "alchemy deploy",
     "destroy": "alchemy destroy",
-    "prepare": "effect-language-service patch"
+    "prepare": "effect-language-service patch && (lefthook install || true)"
   },
   "dependencies": {
     "@app/contract": "workspace:*",
@@ -34,6 +34,7 @@
     "@types/bun": "^1.3.14",
     "@types/node": "^24.0.0",
     "@types/ws": "^8.5.0",
+    "lefthook": "^2.1.9",
     "oxfmt": "^0.55.0",
     "oxlint": "^1.70.0",
     "typescript": "^6.0.3",