# Todo 45.7 Structured Incomplete Mixed Validation Plan

**Status:** done

## Result

Separated fallback eligibility from incomplete-result normalization. Structured `complete=False` no longer bypasses enum, type, or additional-property errors; optional-only incomplete and pure missing-only paths remain eligible.

## Goal

Ensure a structured resolver's explicit `complete=False` signal cannot trigger LLM fallback when the resolved arguments also contain substantive validation errors.

## Scope

- Add structured-incomplete regressions for required plus enum, type, and additional-property failures.
- Compute fallback eligibility before converting optional-schema incomplete results into `INVALID_ARGUMENTS`.
- Allow fallback only for pure missing-only validation or explicit incomplete with no substantive validation error.

## Files

- Modify: `src/agent_lab/application/events/kernel.py`
- Modify: `tests/test_event_kernel.py`

## Requirement Execution Loop

### Plan

1. Add RED tests proving `EventArgumentResolution(..., complete=False)` plus mixed substantive errors currently calls fallback.
2. Separate `fallback_eligible` from the normalized invalid result status.
3. Preserve optional-only explicit incomplete fallback and pure required-missing fallback.
4. Run focused/full tests and final bounded reviews.

### Observe / Update

Close Todo 45 only when the named reproductions pass and no Critical/Important findings remain.

## Verification

- `UV_CACHE_DIR=.uv-cache uv run pytest tests/test_event_kernel.py -q`
- `UV_CACHE_DIR=.uv-cache uv run pytest`
- `git diff --check`