Replace bd create --ephemeral wisp with simple file append to
~/.gt/costs.jsonl. This ensures the stop hook never fails due to:
- Dolt server not running (connection refused)
- Dolt connection stale (invalid connection)
- Database temporarily unavailable
The costs.jsonl approach:
- Stop hook appends JSON line (fire-and-forget, ~0ms)
- gt costs --today reads from log file
- gt costs digest aggregates log entries into permanent beads
This is Option 1 from gt-99ls5z design bead.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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