fix: replace git hook with Claude Code PreToolUse hook

Git hooks can't stage files during commit (index lock). Using Claude Code
PreToolUse hook instead - runs before the bash command executes.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.githooks/commit-msg

@@ -1,31 +0,0 @@
-#!/bin/bash
-# Git commit-msg hook for automatic version bumping
-# This hook runs the version bump script before the commit is finalized
-#
-# To install this hook, run:
-#   git config core.hooksPath .githooks
-# Or copy it manually:
-#   cp .githooks/commit-msg .git/hooks/commit-msg && chmod +x .git/hooks/commit-msg
-
-COMMIT_MSG_FILE="$1"
-COMMIT_MSG=$(cat "$COMMIT_MSG_FILE")
-
-# Skip if this is a merge commit or amend
-if [ -f .git/MERGE_HEAD ] || [ "$GIT_AUTHOR_DATE" != "$GIT_COMMITTER_DATE" ]; then
-    exit 0
-fi
-
-# Skip if commit message starts with "Merge" or is empty
-if [[ "$COMMIT_MSG" =~ ^Merge ]] || [ -z "$COMMIT_MSG" ]; then
-    exit 0
-fi
-
-# Run version bump script
-echo "Running version bump script..."
-uv run scripts/generate_agents.py --bump "$COMMIT_MSG"
-
-# Stage any version files that were modified
-git add -u .claude-plugin/marketplace.json .claude-plugin/plugin.json 2>/dev/null
-git add -u skills/*/reference/scripts/run_actor.py 2>/dev/null
-
-exit 0

scripts/hooks/pre_commit_bump.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+# Claude Code PreToolUse hook - runs version bump before git commit
+# This script receives tool input JSON on stdin
+
+# Read tool input
+INPUT=$(cat)
+
+# Extract the bash command
+COMMAND=$(echo "$INPUT" | jq -r '.tool_input.command // ""')
+
+# Quick exit if not a git commit command
+if ! echo "$COMMAND" | grep -qE 'git\s+commit'; then
+    exit 0
+fi
+
+# Extract commit message from -m "message" or -m 'message'
+COMMIT_MSG=$(echo "$COMMAND" | grep -oE '\-m\s+["'"'"'][^"'"'"']+["'"'"']' | sed -E 's/-m\s+["'"'"'](.*)["'"'"']/\1/' | head -1)
+
+# If no message found, skip bump (might be interactive commit)
+if [ -z "$COMMIT_MSG" ]; then
+    exit 0
+fi
+
+# Run version bump
+cd "$CLAUDE_PROJECT_DIR" 2>/dev/null || cd "$(dirname "$0")/../.."
+uv run scripts/generate_agents.py --bump "$COMMIT_MSG"
+
+# Stage any modified version files
+git add -u .claude-plugin/marketplace.json .claude-plugin/plugin.json 2>/dev/null
+git add -u skills/*/reference/scripts/run_actor.py 2>/dev/null
+
+exit 0