Decision ·
HEADPASS-X2b = the pack line's retrieval recommendation for format-v3 packs; X1 for format-2 packs
From the record
- Context
- HEADPASS-X2b lever (+0.066 on 180 dev self-tests)
- Why
- Opus +0.066 (+0.043…+0.091), no harm on kit
- What followed
- X3 failed at step 0; X2b staged for after 10-20 (PR-2)
- Reversible
- yes
- Status
- kept
- Alternatives considered
- reranker X3; unbudgeted X2
- X1 only (+0.033); X3 reranker (FAIL reach, 21 s/item)
Linked facts · 2
- X2b (neighbour + budgeted dense append) recommended as pack-line default when a format-v3 pack is installed (why: LEVER by frozen rule +0.066 Opus; no harm on kit)X2b (neighbour + budgeted dense append) recommended as pack-line default when a format-v3 pack is installed (why: LEVER by frozen rule +0.066 Opus; no harm on kit)Date2026-10-14Kinda record, not a measurement (set, status, judge, n, seeds: not recorded)Caveatoutcome: Ported to lite tier (LITE5); not a bar leverSourceresearch record
arms/headpass-st/HEADPASS-ST.md:89-91Open the data file - HEADPASS-X2b = the pack line's retrieval recommendation for format-v3 packs; X1 for format-2 packs — why: Opus +0.066 (+0.043…+0.091), no harm on kit — outcome: X3 failed at step 0; X2b staged for after 10-20 (PR-2)HEADPASS-X2b = the pack line's retrieval recommendation for format-v3 packs; X1 for format-2 packs — why: Opus +0.066 (+0.043…+0.091), no harm on kit — outcome: X3 failed at step 0; X2b staged for after 10-20 (PR-2)Date2026-10-14 15:38Kinda record, not a measurement (set, status, judge, n, seeds: not recorded)Sourcenot in the public repositories yetOpen the data file