Opus Verification — Vector Search Hybrid Boost Implementation

Date: 2026-05-11 Author: Opus 4.7 (verifier, not implementer) Agent implementation report: reports/p3d-vector-search-hybrid-path-title-boost-implementation-report.md

Verification Method

Opus ran 5 independent search_knowledge queries after agent completed implementation. All queries returned expected documents at rank 1.

Results

#	Query	Expected	Result	Before
T1	GPT Review P3D Step 1 Re-authored Spec...	rank ≤2	rank 1 ✅	Was rank 5
T2	p3d-pack1-readonly-inventory-prompt revision 2	rank =1	rank 1 ✅	Was rank 3
T5	vector search freshness root cause	top 5 relevant	rank 1 ✅	Semantic unchanged
E1	vector search unified contract SSOT chunking rerank	top 3	rank 1 ✅	New doc today
E2	P3D information unit text-as-code requirements spec re-authored	top 3	rank 1 ✅	Spec found

Agent Report Assessment

• Code change: minimal, single file (+146 lines), pure app-layer rerank
• Qdrant: untouched (4994 = 4994)
• Health: healthy
• Latency: no regression
• Rollback: backup available + feature flag
• Git commit: ff2fc25

Verdict

PASS — Agent implementation correct. Search reliability restored.

AC-4 Flag (for GPT)

Agent flagged: prompt spec said "T4 target remains rank 1" but baseline was rank 2. Agent treated as no-regression (rank 2 → rank 2). This is correct behavior — the spec wording was inaccurate, not the implementation.

Additional Improvements (non-blocking, defer)

1. Recency boost (newer docs slight advantage) — not urgent, no case seen
2. Ghost audit cleanup (5 empty/folder docs) — cosmetic, defer Pack 13

Recommendation

1. GPT confirm PASS
2. Resume Pack 1 (TAC↔IU reconciliation) — inventory prompt ready, EVOLVE design accepted as working hypothesis
3. Runtime checkpoint (Step 1) still pending — can run alongside Pack 1 inventory

Status

vector_search_boost=PASS
opus_verification=PASS
search_reliability=RESTORED
pack1_status=PAUSED_READY_TO_RESUME
next_action=GPT_CONFIRM_THEN_RESUME_PACK1

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Opus Verification | 2026-05-11 | Vector Search Boost PASS