chore(ai-workflow): tighten agent workflow and worktree tooling (#1107)

* chore(ai-workflow): tighten agent workflow and worktree tooling

* fix(ai-workflow): address review feedback

* fix(ai-workflow): make format hook portable

.cursor/hooks/yarn-install.sh

@@ -1,25 +1,4 @@
 #!/bin/bash
-# afterFileEdit hook: Run yarn install when package.json is changed
-# Receives JSON via stdin: {"file_path": "...", "edits": [...]}
 
-# Read stdin (required for hooks)
-input=$(cat)
-
-# Extract file_path using grep/sed (jq-free for portability)
-file_path=$(echo "$input" | grep -o '"file_path"[[:space:]]*:[[:space:]]*"[^"]*"' | sed 's/.*:.*"\([^"]*\)"/\1/')
-
-# Exit if no file path found
-if [ -z "$file_path" ]; then
-  exit 0
-fi
-
-# Only run yarn install if package.json was changed
-if [ "$file_path" = "package.json" ]; then
-  # Change to project directory
-  cd "$(dirname "$0")/../.." || exit 0
-  
-  echo "package.json changed - running yarn install to update yarn.lock..."
-  yarn install
-fi
-
-exit 0
+repo_root="$(cd "$(dirname "$0")/../.." && pwd)"
+exec "$repo_root/scripts/agent-hooks/yarn-install.sh" "$@"