# Controlled ablation boundary

Status: `mixed_not_proven` / disclosure-only for this checked-in Codex 2x cold-resume fixture.

What is demonstrated here: raw paused-session artifacts versus one Open Scaffold compact resume capsule for one paused-work decision, with three Codex replicates per arm and source-labeled receipts.

What is not demonstrated here:

- a minimal-checklist control;
- a packet-only ablation that removes Open Scaffold framing while keeping the same compact facts;
- alternate packet shapes or budgets;
- a broad causal claim that Open Scaffold, rather than compact source facts for this task, caused all token savings.

Minimum ablation packet before any ablation claim may pass:

1. preregistered ablation arms and kill rules;
2. equal model/runtime settings across arms;
3. per-run usage receipts from trusted adapter metadata, not model text;
4. answer artifacts and a scoring protocol that preserves quality ties as ties;
5. aggregate report with exact reproduction enum: `reproduced`, `partially_reproduced`, or `not_reproduced`.

Until those files exist for this fixture, ablation evidence cannot support the bounded PASS and must remain disclosure-only.