chore: add pre-commit hooks with lint-staged (#1465)

Co-authored-by: cpacker <packercharles@gmail.com>
Co-authored-by: Letta Code <noreply@letta.com>

.husky/install.mjs

@@ -0,0 +1,8 @@
+if (process.env.NODE_ENV === "production" || process.env.CI === "true") {
+  process.exit(0);
+}
+
+try {
+  const husky = (await import("husky")).default;
+  husky();
+} catch {}

.husky/pre-commit

@@ -1,3 +1,7 @@
 #!/usr/bin/env sh
-# Run the same checks as CI to ensure parity
-bun run check
+
+# Lint staged files only (fast)
+bunx lint-staged
+
+# Typecheck full project (catches type errors in unchanged files)
+bun run typecheck

package.json

@@ -64,6 +64,7 @@
     "typescript": "^5.0.0"
   },
   "scripts": {
+    "prepare": "node .husky/install.mjs",
     "lint": "bunx --bun @biomejs/biome@2.2.5 check src",
     "fix": "bunx --bun @biomejs/biome@2.2.5 check --write src",
     "typecheck": "tsc --noEmit",