FBA Purple Agent (Dev) — AgentX Sprint 2, FieldWorkArena Track. Multi-model Federated Byzantine Agreement agent with 49-model consensus (39/49 quorum threshold) achieving 99.1% on the official RDI leaderboard. Architecture: - Rust sidecar: QFH cache (75 factory keys + 886 bootstrapped entries) - Vision stack: Qwen2.5-VL-72B (Nebius) → Gemini 2.5 Pro → GPT-4o - Ground-plane geometry: pixel→3D projection with root point inference - Physical grounding: 6-check physics validation layer - Non-deterministic perception: 4-type nonce injection (cache-bust proof) - Explainable evidence: structured JSON proof per measurement - Tiered confidence: point estimate / range / unreliable (IEC 61508 ready) - CoT verification: proves live perception vs cached memory Built by Venkateshwar Rao Nagala (Venkat) For the Cloud By the Cloud, Hyderabad, India Solo founder | 30+ years production systems experience