# C267 evidence packet

Completed 24 September 2026. This packet continues redirected C266 of the 490d Unified Chronology research.

Read `490d_C267_529_Midpoint_and_Seasonal_Bracket_20260924.md`, then `490d_Mirror_Checkpoint_After_C267_20260924.md`. The checkpoint’s C268 proposal is unexecuted.

## Scope and inputs

`SCOPE.json` records the bounded domain declared before verification. `SOURCE_MANIFEST.json` records the eight frozen immediate dependencies in `sources/`, with original paths, byte counts and SHA-256 values. The packet does not repackage all historical evidence. C266 and C265 remain selective reference dependencies.

`CONTROL_INTEGRITY.json` records the post-step hash comparison of the original immediate dependencies, the retained C127 graph and the C265 certificate. It is a recorded workspace check, not a promise that the original absolute paths exist on another machine.

## Reproduce the finite calculation

From this packet’s directory, with Python 3:

```sh
python evidence/check_c267.py --output /tmp/490d_c267_replay
```

The verifier uses only the frozen local inputs and Python’s standard library. It passes 138 assertions and emits:

- `CLASSIFICATION.json`: exact signed marker matches and source tags.
- `SOURCE_PHASE_LEDGER.json`: all 96 tagged seasonal components in the 48-record core.
- `MIDPOINTS.json`: generated LXX midpoint construction and physical seasonal labels.
- `ENVELOPE_LENGTHS.json`: fixed hull, envelope lengths, overlap and union.
- `RESULTS.json`: assertion ledger and bounded result.
- `CLASSIFICATION.csv`: compact classification table.

`REPLAY.json` records byte-identical reproduction of those six files. The authored report and checkpoint are not computational replay outputs. `evidence/INDEPENDENT_CLASSIFICATION.md` and `evidence/FINAL_REVIEW.md` preserve independent review.

## Integrity and continuation

`CERTIFICATE.json` links this completed step to the frozen C266 certificate and binds the report, checkpoint, source manifest, results, replay and control-integrity records. `ARTIFACT_MANIFEST.json` inventories every other payload file by relative path, size and SHA-256; it excludes itself to avoid a circular hash.

No prior campaign, source event search or C268 work is represented as executed here. The separately mentioned 855-check branch package was not supplied. No canonical source or graph was changed. Regular Gears remain Noah/Shem/Flood only.