Add automatic shared dependencies for worktrees

Setup Conductor to automatically share node_modules and vendor directories
across all git worktrees to save disk space and speed up development.

Changes:
- Updated conductor-setup.sh to create symlinks to shared dependencies
- Added documentation to CLAUDE.md explaining the system
- Dependencies now stored in .shared-deps/ in main repository
- All worktrees use the same dependency versions automatically

Benefits:
- Saves hundreds of MBs to GBs of disk space
- No need to run npm install/composer install for each worktree
- Consistent dependency versions across all worktrees

Note: Add .shared-deps/ to .gitignore in the main repository

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

scripts/conductor-setup.sh

@@ -1 +1,29 @@
-cp $CONDUCTOR_ROOT_PATH/.env .env
+#!/bin/bash
+set -e
+
+# Copy .env file
+cp $CONDUCTOR_ROOT_PATH/.env .env
+
+# Setup shared dependencies via symlinks
+echo "Setting up shared node_modules and vendor directories..."
+
+# Create shared-deps directory in main repository if it doesn't exist
+SHARED_DEPS="$CONDUCTOR_ROOT_PATH/.shared-deps"
+mkdir -p "$SHARED_DEPS/node_modules"
+mkdir -p "$SHARED_DEPS/vendor"
+
+# Remove existing directories if they exist and are not symlinks
+[ -d "node_modules" ] && [ ! -L "node_modules" ] && rm -rf node_modules
+[ -d "vendor" ] && [ ! -L "vendor" ] && rm -rf vendor
+
+# Calculate relative path from worktree to shared deps
+WORKTREE_PATH=$(pwd)
+RELATIVE_PATH=$(python3 -c "import os.path; print(os.path.relpath('$SHARED_DEPS', '$WORKTREE_PATH'))")
+
+# Create symlinks
+ln -sf "$RELATIVE_PATH/node_modules" node_modules
+ln -sf "$RELATIVE_PATH/vendor" vendor
+
+echo "✓ Shared dependencies linked successfully"
+echo "  node_modules -> $RELATIVE_PATH/node_modules"
+echo "  vendor -> $RELATIVE_PATH/vendor"