# C683 — Reconstruct the civil alternating continuation

## Question

Does the native30|690 cell close consistently across the missing year zero?

## Inputs

```json
{
  "civil_nodes": [
    "1446BC",
    "1416BC",
    "726BC",
    "696BC",
    "6BC",
    "AD25"
  ],
  "elapsed_coordinate": "BC B -> 1−B; AD A -> A"
}
```

## Sources

```json
[
  "Supplement A §5.2"
]
```

## Opened utc

2026-09-28T01:12:48.529185+00:00

## Results

```json
{
  "elapsed_coordinates": [
    -1445,
    -1415,
    -725,
    -695,
    -5,
    25
  ],
  "gaps": [
    30,
    690,
    30,
    690,
    30
  ],
  "total": 1470,
  "direct_civil": 1470
}
```

## Finding

The admitted continuation preserves30|690|30|690|30 and totals1470 under civil BC+AD−1. Its comparison terminals retain their source roles. The rounded mirror convention is a separate coordinate rule and is not substituted here.

## Reassessment

Relate the source’s750 civil brackets and final three-year completion.

## Checks

```json
{
  "gaps": true,
  "closure": true
}
```

## Closed utc

2026-09-28T01:12:48.529476+00:00

## Record provenance

Exact record hash: `b6d0d5c514db2773c492b86870cea98b88ed11072baf93ebf603ba450c8fb770`

Source journal: `Research_Cycles/C0632_C0731/journal.json`