Groups and channels are town-level entities that span rigs, so they
should use the hq- prefix rather than gt- (rig-level).
Changes:
- GroupBeadID: gt-group- → hq-group-
- ChannelBeadID: gt-channel- → hq-channel-
- Add --force flag to bypass prefix validation (town beads may have
mixed prefixes from test runs)
- Update tests and documentation
Also adds docs/beads-native-messaging.md documenting:
- New bead types (gt:group, gt:queue, gt:channel)
- CLI commands (gt mail group, gt mail channel)
- Address resolution logic
- Usage examples
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
cbbf566f06