Implements Phase 4 of the two-level beads architecture migration: - Add hq- prefix helper functions for town-level agent beads - Add CreateWithID method for deterministic bead creation - Create gt migrate-agents command with dry-run/execute modes - Migrate gt-mayor/gt-deacon to hq-mayor/hq-deacon in town beads - Migrate role beads (gt-*-role) to town beads (hq-*-role) - Add migration labels to old beads for tracking - Idempotent: skips already-migrated beads 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>