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feat(fb-39): eval foundation — precision_at_k_chunk metric #136

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altair823 merged 5 commits from feat/fb-39-eval-foundation into main 2026-05-10 13:41:07 +00:00
Conversation 0 Commits 5 Files Changed 10 +765 -9

5 Commits

Author SHA1 Message Date
th-kim0823
5870a1de15 fix(fb-39): address PR #136 round 1 review 
kebab eval compare now surfaces precision_at_k_chunk delta in both
human-readable table + deltas JSON. Snapshot fixture regenerated
additively.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
 2026-05-10 22:39:11 +09:00
th-kim0823
f00fb376fe docs(fb-39): golden header + design §10.3 eval + spec status + INDEX 
Strengthen fixtures/golden_queries.yaml header with precision_at_k_chunk
explanation + measurement guidance. Add §10.3 Eval metrics section to
frozen design documenting retrieval metrics (hit@k, MRR, recall@k_doc,
P@k_chunk) + groundedness metrics. Flip p9-fb-39 spec status from open
→ completed (eval foundation only, lever deferral noted). Update
tasks/INDEX.md fb-39 row mirror to fb-42 (merged, deferred note).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
 2026-05-10 22:35:15 +09:00
th-kim0823
bb0ec0469f feat(eval): precision_at_k_chunk metric (P@5, P@10) (fb-39) 2026-05-10 22:26:21 +09:00
th-kim0823
f303c76f52 plan(fb-39): eval foundation implementation plan 
4 tasks: AggregateMetrics.precision_at_k_chunk field + serde
backwards-compat, compute aggregation in loop with 5 unit tests,
golden YAML header doc strengthening, design §11 + INDEX + status
flip.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
 2026-05-10 22:19:44 +09:00
th-kim0823
cd5b1e3bfc spec(fb-39): eval foundation design (P@k metric) 
- AggregateMetrics 에 precision_at_k_chunk: BTreeMap<u32, f32>
  (P@5, P@10) 추가, binary relevance via expected_chunk_ids
- Denominator = k 고정 (hits.len() < k 도 precision 손실 간주)
- Empty expected_chunk_ids query 는 skip (hit_at_k 동일 정책)
- Lever 적용 (chunk policy / RRF / cross-encoder / embedding) 은
  본 spec 범위 외 — fb-39b 이후 별도 task
- Golden set schema 무변경, shipped fixtures 헤더 주석만 강화

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
 2026-05-10 22:05:09 +09:00