Recover frozen development inputs for visual-document evaluation #407
- MA
## Summary
Recover the frozen development input manifest from the earlier visual-document corpus, then add a versioned dataset that a fresh clone can load offline. V2 contains 7 attributed, source-grounded discussion adaptations (27 cutoffs), 19 input-only synthetic chats (68 checkpoints), and one pinned original Rust RFC. It keeps expected outcomes out of model input and verifies each committed file by size and SHA-256.
The historical registry remains byte-identical (`5cdc0868…889cb`). V2 retains its original source hashes, IDs, source clusters and cutoff times rather than changing the earlier experiment record. The small API is `listCases()` / `loadCase(id, checkpointId?)` in `evals/datasets/v2.ts`.
## Verification
- Fresh `git archive` checkout with no ignored files: `bun test evals/datasets/input.test.ts evals/datasets/v2.test.ts` — 5 pass, 0 fail, 0 skip. - `bun run types` and `bun run ci` — pass. - Original Rust RFC and historical registry byte hashes match their pinned values; all 27 committed input files match the V2 manifest.
## Source limits
The GitHub discussions are clearly labeled paraphrases, not republished contributor comments. Each event points to its source and keeps historical timing. Their summaries preserve the discussion structure but do not retain complete original wording or long code examples. The Rust RFC uses its source repository's MIT license option and carries the notice. The unlicensed ESLint RFC supplement remains historical metadata, not a V2 text input. These are development candidates, not approved gold or model-quality results. Validation and unopened holdout files are excluded.
## Data flow

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