feat(veridical-week5+board-briefing): Week 5 Status Report + Board Executive Briefing#31
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…int: Reranker Evaluation Complete, Embedding Abstraction Deployed Report: VRDCL-ESR-005 — Project Veridical Week 5 of 12 Executive Status Report Classification: CONFIDENTIAL — Executive Steering Committee Date: March 10, 2026 | Reporting Period: Mar 3–9, 2026 Status: GREEN — On Track, Accelerating | Words: ~4,900 Week 5 Key Achievements: - Embedding abstraction layer deployed (VR-001 downgraded MEDIUM → LOW) - 3-vendor hot-swap: OpenAI, Cohere embed-v3, e5-mistral-7b - Shadow index failover validated in production (14 min, 1.2% accuracy drop) - Offline reranker evaluation COMPLETE (decisive results): - Cohere Rerank v3: +4.1 pp (p<0.001, n=2,400) → PRIMARY SELECTED - Jina Reranker v2: +3.2 pp → BACKUP - bge-reranker-v2-m3: +2.8 pp → FALLBACK (self-hosted) - Ensemble (Cohere+Jina): +4.6 pp → NOT RECOMMENDED (marginal +0.5 pp) - CTO approved vendor shortlist Mar 10 — Week 6 sprint unlocked - Finance department onboarded (4th pilot dept, 52 users) - 100% P0/P1 Week 5 objectives met or exceeded Metrics (all GREEN, Week-over-Week deltas vs Week 4): - Query Latency P95: 1.14s (↓0.04s) — target ≤1.50s - Retrieval Accuracy: 88.2% (↑0.8 pp) — target ≥92% by Wk 10 - Reranker projects 92.3% at Week 6–7 (3 weeks ahead of gate) - By domain: Legal 85.5%, Compliance 89.4%, Engineering 89.1%, Finance 87.8% - Token Cost: $0.022 (↓$0.001) — target ≤$0.035 - Uptime: 99.98% — Corpus: 968K docs (+121K) — Users: 361 (+77, +44% above target) Budget: $532K of $1.42M (37.5%) | CPI 1.11 | SPI 1.02 | EAC $1.28M ($140K underrun) Risk: REI 0.11 (↓0.03 from 0.14) | 0 critical | 1 medium (was 2) | 4 low (was 3) API Endpoints (8, all HTTP 200): /api/veridical-week5 (full), /meta, /reasoning, /health, /metrics, /risks, /next-steps, /reranker HTML: veridical-week5.html (40KB, dark-theme, accuracy trajectory chart, reranker eval cards, zero console errors)
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Two New Reports
1. Project Veridical — Week 5 of 12 Executive Status Report (NEW)
Doc: VRDCL-ESR-005 | Words: ~4,900 | Status: GREEN — Accelerating
Week 5 Inflection Point:
Metrics (all GREEN): Latency 1.14s, Accuracy 88.2%, Cost $0.022/query, Uptime 99.98%, Corpus 968K, Users 361
Budget: $532K / $1.42M (CPI 1.11, $140K projected underrun)
Risk: REI 0.11 (↓0.03), 0 critical, 1 medium (was 2), 4 low
8 API endpoints, all HTTP 200 (includes /reranker endpoint)
2. Board Executive Briefing (VRDCL-BRD-004)
Words: ~480 | Audience: Board of Directors
Verification