Add commit hook to prevent Claude attribution

Adds shell-based git hook that validates commit messages and rejects any containing Claude attribution patterns. Configured git to use .husky directory for hooks.

Author: wassertim

.husky/commit-msg

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# Husky commit-msg hook to prevent Claude attribution in commit messages
+# This is a shell script version that works without Node.js
+
+if [ -z "$1" ]; then
+    echo "❌ Error: No commit message file provided"
+    exit 1
+fi
+
+COMMIT_MSG_FILE="$1"
+
+if [ ! -f "$COMMIT_MSG_FILE" ]; then
+    echo "❌ Error: Commit message file not found: $COMMIT_MSG_FILE"
+    exit 1
+fi
+
+# Read the commit message
+COMMIT_MSG=$(cat "$COMMIT_MSG_FILE")
+
+# Define patterns to detect Claude attribution (using grep -E for extended regex)
+CLAUDE_PATTERNS="🤖 Generated with.*Claude|Generated with.*Claude Code|Co-Authored-By: Claude|claude\.com/claude-code|@anthropic\.com|Claude Code.*anthropic|Generated with \[Claude Code\]|\[Claude Code\]\(https://claude\.com/claude-code\)"
+
+# Colors for console output
+RED='\033[31m'
+YELLOW='\033[33m'
+GREEN='\033[32m'
+RESET='\033[0m'
+
+# Check for Claude attribution patterns
+if echo "$COMMIT_MSG" | grep -iE "$CLAUDE_PATTERNS" >/dev/null 2>&1; then
+    FOUND_ATTRIBUTION=true
+    MATCH=$(echo "$COMMIT_MSG" | grep -iE "$CLAUDE_PATTERNS" | head -1)
+else
+    FOUND_ATTRIBUTION=false
+fi
+
+if [ "$FOUND_ATTRIBUTION" = true ]; then
+    echo "${RED}❌ COMMIT REJECTED${RESET}"
+    echo "${YELLOW}⚠️  Commit message contains Claude attribution.${RESET}"
+    echo ""
+    echo "Found Claude attribution pattern:"
+    echo "  • Match: \"$MATCH\""
+    echo ""
+    echo "Please edit your commit message to remove Claude attribution."
+    echo "Use: git commit --amend -m \"your new message\""
+    echo ""
+    exit 1
+fi
+
+echo "${GREEN}✅ Commit message validated - no Claude attribution detected${RESET}"
+exit 0