# C1280 — Assess the third block’s family-level explanatory gains

## Question

Has the work returned fromlocalboundaries to theStrategy’slargergoal?

## Inputs

```json
{}
```

## Sources

```json
[
  "C1232–C1279",
  "Strategy.md"
]
```

## Opened utc

2026-09-28T06:00:02.743062+00:00

## Results

```json
{
  "family_progress": {
    "path": "model/block3_family_progress_ledger.json",
    "sha256": "3dbedcfb740458c8a14316f873bd92fbda3bdd5dfbe8ae99272aa253a8c7aeaf",
    "bytes": 1600
  }
}
```

## Finding

Thethirdblock connectedthecompleteMoses, Regularkernel, NT andRoundedinversefamilies. Furtherprogress should nowconsolidate theseverifiedinterfaces into theStrategy’s four-partpresentation, with sourcecostsandlimits attached.

## Reassessment

Close the150-actioncheckpoint andrereadthefullStrategybefore C1282.

## Checks

```json
{
  "five_topics": true,
  "all_limits": true
}
```

## Closed utc

2026-09-28T06:00:02.743492+00:00

## Record provenance

Exact record hash: `3da4c96b90e8d0d69dd2768f89837ec9a53491cc34b0435cc73fbfa1cc6c47cb`

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