# C830 — Write the restart checkpoint

## Question

What must the next continuation retain without repeating this cycle?

## Inputs

```json
{}
```

## Sources

```json
[
  "C731 predecessor; C732–829"
]
```

## Opened utc

2026-09-28T02:20:32.073379+00:00

## Results

```json
{
  "restart_checkpoint": {
    "path": "deliverables/490d_Chronological_Families_Checkpoint_After_C831.md",
    "sha256": "b1b1d3312abd1a25cc155dccacbc0ed241b18396d68d3b79c46d69fdb63b8943",
    "bytes": 5620
  },
  "next_unused_step": 832
}
```

## Finding

The continuation state now preserves the full explanatory model, exact new fields, source tensions, and scope controls. It is ready for the closing100-step seal.

## Reassessment

Seal C732–C831, run final verification, and save the final artifacts.

## Checks

```json
{
  "next832": true,
  "primary_pin_present": true
}
```

## Closed utc

2026-09-28T02:20:32.073741+00:00

## Record provenance

Exact record hash: `ac45f2e4c03482fa000c6321c3e56741dc94cc17b37cd2a280d48a626ffc7d70`

Source journal: `Research_Cycles/C0732_C0831/journal.json`