P270 · Evaluation & feedback

Keep selection feedback out of revision prompts

Keep withheld-case results out of the prompt that proposes revisions, and name the resulting selection set accurately.

Editorially reviewed

These examples and illustrative results are independently authored teaching materials, not measured model results.

Use case

A routing description is revised from training failures and reserved queries select winners each round. Even if the reviser never reads queries, repeated selection makes them validation/selection, not an independent final test.

Mechanism

Fix train, selection and final-confirmation identities and feedback permissions. Give revisers training material only, removing withheld history fields and inspecting full prompts/referenced files for leaks. Name selection honestly; hold final cases until selection ends. Once final feedback informs revision, it is no longer untouched. Label stored thresholds/scores historical and unreviewed gates provisional.

Bad example

Feed withheld failures into every rewrite while calling the best score an untouched test result.

Good example

Expose only training failures and filtered history to the reviser. Select candidates using a separate validation score and confirm on new cases unused in selection. Record set identities and feedback access; stored thresholds are not fresh evaluations.

Why the change matters

Isolation reduces direct leakage, but adaptive selection still consumes selection information. Correct naming prevents validation wins from becoming independent generalization claims.

Observable expectation

Teaching prompt snapshots exclude selection cases/score fields, and selection/final tables have IDs. Using final failures for another revision turns that set into development feedback requiring new confirmation. Inspect references/history, not just one filtered field.

Limits

Small samples may justify directional results rather than fabricated three-way splits. Repetitions are not automatically independent cases, and deterministic curated corpora do not yield population intervals by assertion. Frozen sources sometimes call selection test; explain actual use.

Sources and evidence

Read the editorial criteria