The ValidateAgentID function was hardcoded to only accept 'gt-' prefix, but beads rig uses 'bd-' prefix. Now accepts any valid prefix. Changes: - Extract prefix dynamically instead of hardcoding 'gt-' - Accept IDs like bd-mayor, bd-beads-polecat-pearl - Update error messages to be prefix-agnostic - Add test cases for alternative prefixes 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>