| Field | Required | Description |
|---|---|---|
| token | required | Auth token |
| system | required | System code |
| since | required | Session open timestamp YYYY-MM-DD HH:MM:SS |
| summary | required | One-sentence session summary |
| duration_minutes | required | Session length in minutes |
| work_done | required | Full description of work completed |
| decisions | required | JSON array of {subject, detail, approved_by} |
| handoff | optional | Markdown string → writes to gov/handoff-[code].md |
| context_pct | optional | Fog percentage 0-100 |
| context_bucket | optional | LOW / MED / HIGH / CRITICAL |