# B10 G19 — B9-NEW-1 write_eval Fix Verification

| Field | Value |
|---|---|
| Date | 2026-05-05 |
| main HEAD | `45ef02b` |
| Verdict | **no-fix-required** |
| Classification | resolved-indirectly |

## What changed

Nothing. No fix was implemented for B9-NEW-1 / G19.

The write_eval validation failure was a downstream symptom of the B9-NEW-2 bug
(compute_paths ValueError) and the G15 permission_denied pattern. Both were resolved by
prior fixes:

- `8f3bccf` — B9-NEW-2 / G17: `_extract_skill_name` top-level `target_skill` handling
- G15 (earlier batch) — startup_guard auto-approve for stdlib file reads

## Tests added

None. No new test was written because:
1. The failure is not reproducible at current HEAD
2. The root cause is already covered by existing Tier 2 tests added in `8f3bccf`
   (5 tests verifying `_extract_skill_name` and `compute_paths` with both artifact forms)
3. Writing a test for "write_eval succeeds when analyze_skill produces valid skill_analysis"
   would be a Tier 3 (LLMReplay) test — requires an actual LLM response trace, which
   cannot be fabricated (see testing policy: no mocks)
4. The B10-Step1 S5b direct verification already serves as the e2e Tier 3 test evidence

## Per-fix retest plan (for Step 3)

- **B9-NEW-1 (write_eval)**: No separate retest needed. The `reyn run skill_improver`
  run in B10-G19 diagnosis confirmed write_eval succeeds in skill_improver context.
  If Step 3 includes an S1 retest (skill_improver chain via `reyn chat`), the write_eval
  phase should pass if analyze_skill completes with valid test_cases.

- **Remaining blockers after B10 Step 2**:
  The skill_improver chain run (B10-G19 diagnosis) revealed a new downstream issue:
  `run_and_eval` phase has `improver_state.json not_found` — the prepare phase did NOT
  write the state file. This is separate from B9-NEW-1 and should be tracked as a new item
  if it proves to block chain completion.

## Full test suite

Not run (no code changes made). The suite was 1005 passed at task dispatch.
Since no source files were modified, the suite remains at 1005 passed.

## Summary

B9-NEW-1 is classified **resolved-indirectly**. No new fix or test added. The write_eval
validation failure was entirely caused by analyze_skill producing degenerate output
(empty test_cases) due to permission_denied errors — a consequence of bugs that are now
fixed. The schema, phase instructions, and OS code are all correct.
