feat: conductor.json lifecycle hooks + .env propagation across worktrees

bin/dev-setup now copies .env from main worktree so API keys carry
over to Conductor workspaces automatically. conductor.json wires up
setup and archive hooks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bin/dev-setup

@@ -4,16 +4,34 @@
 # Creates .claude/skills/gstack → (symlink to repo root) so Claude Code
 # discovers skills from your working tree. Changes take effect immediately.
 #
+# Also copies .env from the main worktree if this is a Conductor workspace
+# or git worktree (so API keys carry over automatically).
+#
 # Usage: bin/dev-setup       # set up
 #        bin/dev-teardown    # clean up
 set -e
 
 REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
 
-# 1. Create .claude/skills/ inside the repo
+# 1. Copy .env from main worktree (if we're a worktree and don't have one)
+if [ ! -f "$REPO_ROOT/.env" ]; then
+  MAIN_WORKTREE="$(git -C "$REPO_ROOT" worktree list --porcelain 2>/dev/null | head -1 | sed 's/^worktree //')"
+  if [ -n "$MAIN_WORKTREE" ] && [ "$MAIN_WORKTREE" != "$REPO_ROOT" ] && [ -f "$MAIN_WORKTREE/.env" ]; then
+    cp "$MAIN_WORKTREE/.env" "$REPO_ROOT/.env"
+    echo "Copied .env from main worktree ($MAIN_WORKTREE)"
+  fi
+fi
+
+# 2. Install dependencies
+if [ ! -d "$REPO_ROOT/node_modules" ]; then
+  echo "Installing dependencies..."
+  (cd "$REPO_ROOT" && bun install)
+fi
+
+# 3. Create .claude/skills/ inside the repo
 mkdir -p "$REPO_ROOT/.claude/skills"
 
-# 2. Symlink .claude/skills/gstack → repo root
+# 4. Symlink .claude/skills/gstack → repo root
 # This makes setup think it's inside a real .claude/skills/ directory
 GSTACK_LINK="$REPO_ROOT/.claude/skills/gstack"
 if [ -L "$GSTACK_LINK" ]; then
@@ -26,7 +44,7 @@ elif [ -d "$GSTACK_LINK" ]; then
 fi
 ln -s "$REPO_ROOT" "$GSTACK_LINK"
 
-# 3. Run setup via the symlink so it detects .claude/skills/ as its parent
+# 5. Run setup via the symlink so it detects .claude/skills/ as its parent
 "$GSTACK_LINK/setup"
 
 echo ""