# C807 — Transfer the retained-component Key operation to BJ

## Question

Does the designated460 expansion produce the supplied completion while retaining the earlier path?

## Inputs

```json
{
  "held_call": 1906,
  "prefix_Creation_to_call": 1950
}
```

## Sources

```json
[
  "File20 §7A.10; C731 retained-component grammar"
]
```

## Opened utc

2026-09-28T02:08:44.369038+00:00

## Results

```json
{
  "native_tail": 460,
  "expanded_tail": 500,
  "generated_endpoint": 1406,
  "retained_prefix_total": 2450,
  "uniform_whole_diagnostic": "60250/23",
  "gain": 40
}
```

## Finding

Expanding the final460 to500 adds40 and reaches Conquest1406 with the call fixed. Retaining the1950 prefix gives2450. Uniform expansion of the full2410 is a different path operation.

## Reassessment

Join the BJ duration to the source NT2450 construction at its declared head roles.

## Checks

```json
{
  "completion": true,
  "total2450": true,
  "gain40": true,
  "different_uniform": true
}
```

## Closed utc

2026-09-28T02:08:44.369344+00:00

## Record provenance

Exact record hash: `acfc3dc4fbaad0fbc25f98cb74b7a9b1c248ab5bb46dfff576d16cc0c7d03fd7`

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