{
  "task": "mobile-virtuoso-scroll-jank",
  "last_updated": "2026-03-31",
  "items": [
    {
      "id": "F001",
      "priority": 1,
      "status": "completed",
      "description": "Reproduce, profile, and fix mobile-only scroll jank on Virtuoso-backed board feeds, starting with /all using the custom Node RPC.",
      "verification": [
        "./scripts/agent-init.sh --smoke",
        "playwright-cli mobile verification on /all with the custom RPC configured",
        "yarn build",
        "yarn lint",
        "yarn type-check",
        "yarn doctor"
      ],
      "files": [
        "src/components/comment-media/comment-media.tsx",
        "src/views/board/board.tsx",
        "src/views/board/__tests__/board.test.tsx",
        "docs/agent-runs/mobile-virtuoso-scroll-jank/feature-list.json",
        "docs/agent-runs/mobile-virtuoso-scroll-jank/progress.md"
      ],
      "notes": "Work stayed isolated in a dedicated worktree/branch. Profiling confirmed the mobile multiboard Virtuoso feed was underestimating row height and remounting tall rows too aggressively on reverse scroll. A second pass removed board-state snapshotting from the hot scroll path, added stronger reverse-direction overscan for mobile multiboards, and deduplicated GIF first-frame work in CommentMedia. Desktop comparison remained partially inconclusive because fresh desktop sessions sometimes failed to hydrate feed rows."
    }
  ]
}