I read this as execution of the isolated Task26 Gate19 adversarial matrix against the specified immutable successor digest - I’ll reconstruct the prior 23-node protocol, extend it for the repaired post-cleanup archive boundary, run every node under the stated isolation constraints, verify candidate integrity before and after, and append only the resulting receipt.


The prior Gate19 artifacts and the repaired successor freeze are present. I’m now extracting the exact matrix runner, receipt schema, immutable candidate layout, and the archive-boundary repair contract before executing anything.


I read this as execution - I ran Gate19 offline, verified all nodes, and retained append-only receipts.

Gate19 **PASS** against immutable successor `3b42723d...d527`:

- 45/45 pytest nodes passed.
- 2/2 direct archive-boundary nodes passed.
- Candidate verifier passed before and after with identical digest.
- All 15 requested adversarial categories covered.
- Bubblewrap denied network access; root was read-only.
- Source status and candidate tree were unchanged.
- Disposable execution artifacts were removed.
- No Git, profile, archive, candidate, service, or live-system mutations.

Receipt:

`/.omo/evidence/task26/task26-gate19-3b42723d0e8256351defdf31958f9ade795f80a7be456529740949c87875d527-receipt.json`

SHA-256: `6236927613e3e50ae998c2f00d3dba8c639dd146145b8ddd7624094a4d05555e`

Matrix SHA-256: `e07393c6c0d1346cff451bc0e2593b8458fabca59fb5ce77381b4e502b339f95`