idkmesh

Phase B2 Task 004 evidence

Date: 2026-08-29

Scope

Issue #5 still lacked scored evidence for the frozen safe-cohort-loader refactor. The bounded worker reconstructs that one-file change against source 9c53bb4069a5db1c0688dbbe7a8f028540cbf7c2, without modifying the benchmark definition or evaluator.

Verification design

The candidate routes validate and definition-digest through one shared repository-bounded loader. The frozen public EvaluatorPlan v0.4 checks the patch structure, artifact hashes, logs, and WorkUnit binding. A separate behavioral probe confirms both commands reject an external cohort path, then temporarily restores the unsafe loader in only definition-digest and observes the expected divergence.

Authority boundary

The worker and seeded probe run in an isolated checkout. The metadata evaluator does not execute candidate code. The resulting support recommendation does not grant candidate-selection, canonical-write, push, or merge authority.