# C1258 — Verify the full placement field against its literal source

## Question

Do all eight source rows support the generated offsets with nodeclasses retained?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1256",
  "File07 §2.11.1a",
  "prep/regular_kernel_source_cost.json"
]
```

## Opened utc

2026-09-28T05:46:41.681559+00:00

## Results

```json
{
  "literal_states": {
    "path": "model/regular_kernel_literal_eight_states.json",
    "sha256": "656a663efb970ffb4164c7877345e18c2a2afc2b2165334b615c4db8906560eb",
    "bytes": 2918
  },
  "states": 8
}
```

## Finding

All eight states are explicitly present in the source with distinctYear6 andcompletion labels. The405 geometry is a reconstruction of thatcompletefinitefield, not an extrapolation from twoendpoints.

## Reassessment

Solve the exact conditions connecting thisplacementfield to the row-generatedheadgaps.

## Checks

```json
{
  "eightbindings": true,
  "offsets": true,
  "phase2": true
}
```

## Closed utc

2026-09-28T05:46:41.685083+00:00

## Record provenance

Exact record hash: `1ec561163270dd28520393c528af658364b0f17805c122359487ffd1756c76d6`

Source journal: `Research_Cycles/C1132_C1431_Recovered/journal.json`