{
  "project": "gpu-pilot",
  "doc": "TODO.md",
  "title": "Sprint Checklist (phases A\u2013E)",
  "oneline": "The working checklist. A and B-core are done; C (walk matrix), D (tri-state), E (cost engine) are open.",
  "tldr": [
    "Phase A (kernel correctness): COMPLETE \u2014 bit-exact GPU == CPU on synthetic + real MTA feed.",
    "Phase B (scale + perf): core complete \u2014 full-grid runs, timings, tiled export, res-10 chunk driver; Nsight/warp-counters deliberately deferred.",
    "Phase C next: cuGraph OSM walk matrix replaces the crow-fly fallback (biggest correctness upgrade left).",
    "Phase D: tri-state multi-feed + the URGENT feed refresh (feed 511 calendar expired 2026-05-16).",
    "Phase E: journey reconstruction + Fares-v2/fuel/toll/parking cost engine \u2014 the 'how much' half of the product."
  ],
  "updated": "2026-06-11 18:12",
  "sections": [
    {
      "level": 1,
      "title": "RAPTOR GPU \u2014 next-sprint checklist"
    },
    {
      "level": 2,
      "title": "A. Kernel correctness (week 1) \u2014 \u2705 COMPLETED 2026-06-10"
    },
    {
      "level": 2,
      "title": "B. Multi-source batching and performance (week 2) \u2014 core items \u2705 2026-06-10"
    },
    {
      "level": 2,
      "title": "C. Walk-leg integration (week 2, parallel with B) \u2014 core items \u2705 2026-06-11"
    },
    {
      "level": 2,
      "title": "D. Multi-region scaling and ops (sprint after next)"
    },
    {
      "level": 2,
      "title": "E. Time+cost product layer (post-pilot \u2014 from REVIEW.md \u00a75-6; the kernel is upstream input to this, not the product)"
    }
  ],
  "stats": {
    "lines": 110,
    "words": 1803
  },
  "html": "https://board.certihomes.com/project-docs/gpu-pilot/TODO.html",
  "out_name": "TODO.md",
  "comments_api": "https://board.certihomes.com/api/doc-comments?project=gpu-pilot&doc=TODO.md"
}