Add Claude Code pre-commit hook to enforce cargo fmt and clippy

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: antonio2368

.claude/hooks/pre-commit.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Block git commit if cargo fmt or clippy fail
+
+INPUT=$(cat)
+COMMAND=$(echo "$INPUT" | jq -r '.tool_input.command')
+
+# Only check git commit commands
+if ! echo "$COMMAND" | rg -q 'git commit'; then
+  exit 0
+fi
+
+ERRORS=""
+
+if ! cargo fmt --check 2>&1; then
+  ERRORS="cargo fmt --check failed. Run 'cargo fmt' first."
+fi
+
+if ! cargo clippy -- -D warnings 2>&1; then
+  ERRORS="${ERRORS:+$ERRORS\n}cargo clippy failed. Fix lint warnings first."
+fi
+
+if [ -n "$ERRORS" ]; then
+  jq -n --arg reason "$ERRORS" '{
+    "hookSpecificOutput": {
+      "hookEventName": "PreToolUse",
+      "permissionDecision": "deny",
+      "permissionDecisionReason": $reason
+    }
+  }'
+  exit 0
+fi
+
+exit 0

.claude/settings.json

@@ -0,0 +1,15 @@
+{
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": ".claude/hooks/pre-commit.sh"
+          }
+        ]
+      }
+    ]
+  }
+}