Agents were confused when receiving "gt prime" as their first prompt,
interpreting it as a command to investigate rather than understanding
they were starting a Gas Town session.
Changed crew_at.go, start.go, and handoff.go to use FormatStartupNudge()
which produces a proper beacon like:
[GAS TOWN] george/crew/george <- human • 2026-01-09T10:30 • start
The SessionStart hook (gt prime --hook) still injects context - the
prompt just needs to be something agents recognize as a greeting.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
86739556c2