# Commercial — Kai trial ledger

- **Quote:** [quote.yaml](quote.yaml) — month-1 estimate (~72 800 Kai)
- **Ledger:** [ledger.jsonl](ledger.jsonl) — append-only charges/credits
- **Schema:** architecture §10 (`KaiLedgerEntry`)

## Rules

- No secrets or full shell transcripts in ledger lines
- Seat/ramp charges when phase transitions are accepted
- Duty charges on session close
- Empty account pauses new duties (ramp-down still allowed)

## Example duty charge

```json
{
  "apiVersion": "kaizen.agentic/v1",
  "kind": "KaiLedgerEntry",
  "id": "kai-YYYYMMDDTHHMMSSZ-001",
  "account": "coulomb-ops-kai",
  "engagement_id": "eng-coulomb-railiance01-ho-001",
  "type": "duty_charge",
  "product": "standard_review",
  "capability_tier": 4,
  "access_surcharge_product": "host_observe",
  "amount_kai": 1700,
  "currency": "KAI",
  "session_ref": "reports/YYYY-MM-DD-health-review.md",
  "created_at": "YYYY-MM-DDTHH:MM:SSZ",
  "metadata": {"target": "railiance01", "phase": "operating"}
}
```