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search: Phase 3 ranking TF-IDF + BM25 + top-N + 23 tests
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rankTfIdf and rankBm25 (configurable k1/b) over the candidate set, float scores
with deterministic DocId tiebreak; topNTfIdf/topNBm25. df/idf derived from
posting-list length. Tests cover tf/idf behavior, a BM25-vs-TF-IDF flip from
length-norm + tf-saturation, the b-parameter effect, tiebreak stability. 101/101.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
giles
2026-06-06 19:56:50 +00:00
parent 4c84decc01
commit a3f9d4f6c9
7 changed files with 132 additions and 14 deletions
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lib/search/scoreboard.md
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@@ -1,9 +1,10 @@
# search scoreboard
**78 / 78 passing** (0 failure(s)).
**101 / 101 passing** (0 failure(s)).
| Suite | Passed | Total | Status |
|-------|--------|-------|--------|
| index | 18 | 18 | ok |
| boolean | 28 | 28 | ok |
| parse | 32 | 32 | ok |
| rank | 23 | 23 | ok |