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Keep every matching table row per chunk (RAG-A-02, split from #3707) - #3711
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Group table-fact matches per source chunk, keeping up to five facts (deduplicated by id) while the chunk keeps its best fact's score. Split out of #3707 so it gets its own canary pair.
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Check name Status Explanation Title check The title clearly describes the main change: retaining every matching table row per chunk. It also includes the relevant RAG identifier. Description check The description explains the behavior change, implementation, affected files, deployment impact, verification evidence, and canary plan. It does not use every template heading, but it provides the req… Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request. Full details: Description check
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Explanation
The description explains the behavior change, implementation, affected files, deployment impact, verification evidence, and canary plan. It does not use every template heading, but it provides the required decision-making context.
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Grok Bot taking over this PR per the owner's 2:34 PM AWST instruction (handover confirmed by Helper 3; last push 14:31 AWST, quiet since). Backup: backup/3711-pre-sweep-1435. |
Addresses Gitar review: a higher-ranked row from a sibling variant could be cut by the five-fact cap while still setting the chunk's score. Also restores the searchTableFactCandidates JSDoc to its function.
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Reviewed commit: b12d5c65f0
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…-A-02) Addresses Codex review: a fact returned by two query variants kept its first, lower rank.
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Disabled auto-merge that gitar-bot enabled at 3:42 PM AWST. Per the owner, this PR should only be armed once the eval-canary shows no regression, and the canary only measures main (see Canary plan). That needs an owner decision on the merge-then-canary order, so it stays unarmed for now. — Grok Bot |
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Actionable comments posted: 1
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Inline comments:
Review comments at @src/lib/rag/rag-candidate-sources.ts:
- Around line 1791-1794: Update the grouped chunk winner selection to compare
next.textRank with current.textRank instead of hybridScore, while preserving the
existing tableFacts merge behavior for non-winning rows.
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src/lib/rag/rag-candidate-sources.tstests/table-fact-grouping.test.ts
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Addresses CodeRabbit review: hybridScore is capped, so rows with ts_rank_cd above 1 tied and a better later row did not update the chunk's textRank or reason. Ties keep the first row. Owner-approved on #3711 (16:59 AWST).
Code Review ✅ Approved 1 closed / 1 findings🟡 Medium risk · Returning up to five table facts per chunk changes retrieved evidence, which could surface lower-relevance rows and alter downstream answers. Keeps every matching table row per chunk (up to five, deduplicated by id, highest text_rank first) instead of only one, with the chunk's score still tied to its best fact. The finding that the five-fact cap could drop the row setting the chunk's score has been resolved. No open issues found. ✅ 1 closed✅ Edge Case: Five-fact cap can drop the row that sets the chunk's score
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Split out of #3707 at the owner's request (21 Oct 2026), so that the table-row grouping gets its own canary pair.
Before: when several table rows matched the same chunk, a lower-ranked row was dropped along with its lower score, so only about one structured row survived per chunk. After: every matching row is kept (the five highest-ranked by text_rank, ties in arrival order).
Changes:
groupTableFactMatchesandmaxTableFactsPerChunkinsrc/lib/rag/rag-candidate-sources.ts, used bysearchTableFactCandidates, plustests/table-fact-grouping.test.ts.RAG impact: behaviour change. This applies as soon as it deploys against the existing corpus (no re-index needed). Any query whose table RPC returns several rows for one chunk will now expose up to five rows instead of one.
Canary plan
The eval-canary only measures
main(docs/rag-behaviour/safeguards.md), so the pair runs around the merge, and only once the OpenAI quota on the GitHub Actions key allows (the last run, 18 Oct, failed with "OpenAI quota is exhausted"):eval-canaryonmainimmediately before merging. It must be green.eval-canaryagain and compare with--fail-on-regression(recall pinned at 1.0, zero per-case RR regressions).Stays a draft until the quota is available and the baseline is green.
Evidence (local)
table-fact-grouping,table-factsandtable-fact-rankingVitest: 8 passed (b12d5c6).npm run typecheckclean. eslint clean on the changed files.Summary by cubic
Fixes table-fact grouping (RAG-A-02) so every matching table row per chunk is kept—up to five, deduplicated by id, keeping the highest-ranked facts—instead of only the single highest-ranked row. A higher-ranked row from a sibling variant displaces a lower-ranked one once the cap is full, and a duplicated fact keeps its higher-ranked copy.
The chunk's winning fact is now chosen by text rank rather than hybrid score, since the hybrid score is capped and can tie rows with high
ts_rank_cd; ties keep the first row. The chunk's score remains tied to its best fact, so ranking and ordering are unchanged.The change applies immediately on deploy with no re-index needed; any query returning multiple table rows for a chunk now exposes up to five rows instead of one. It adds
groupTableFactMatchesandmaxTableFactsPerChunkinsrc/lib/rag/rag-candidate-sources.ts, with tests intests/table-fact-grouping.test.ts.Written for commit 5574366. Summary will update on new commits.
Summary by CodeRabbit
Bug Fixes
Tests