# Autodev State

## Current Step
flow: greenfield
step: 2
name: Research
status: in_progress
sub_step:
  phase: 10
  name: sq3-sq4-c1-vio-candidates
  detail: "Mode A Phase 2 engine Step 4 — SQ3+SQ4 per-component candidate matrix, starting with C1 (VO/VIO). SQ1 ✓, SQ2 ✓ closed with three architectural decisions resolved by user (recorded in 00_question_decomposition.md): (1) DSM dependency = (a) 3-DoF acceptance (no DSM in cache; attitude from IMU/VIO); (2) AdHoP = (b) conditional (only when initial reprojection error exceeds threshold); (3) Top-N re-rank = (a) promoted to explicit pipeline sub-stage between C2 and C3. Pipeline shape entering SQ3+SQ4: C1 (VIO) → C2 (VPR) → Top-N re-rank → C3 (matcher) → AdHoP-conditional → C4 (PnP+RANSAC+LM) → C5 (estimator) → C8 (FC adapter), with C6 (cache 2D-ortho) + C7 (Jetson runtime) + C9 (datasets) + C10 (provisioning) cross-cutting. C1 candidates entering SQ3+SQ4 (RTAB-Map and ORB-SLAM3 already pruned by Fact #16): VINS-Mono / VINS-Fusion / OpenVINS / OKVIS2 / DROID-SLAM / DPVO / pure-VO baseline (KLT + RANSAC homography). Per-mode context7 capability verification mandatory for every lead library/SDK candidate. Next conversation: re-enter Step 2 / sub_step phase 10 name 'sq3-sq4-c1-vio-candidates', execute Per-Component Search Plan (`research/steps/03_engine-investigation.md` Step 4) starting with C1: enumerate 5+ search variants per candidate, log to 01_source_registry.md + 02_fact_cards.md, then Component Applicability Gate (must pass: monocular VIO, ≥3 fps output, Jetson Orin Nano runnable, license OK for dual-use)."
retry_count: 0
cycle: 1