{
  "sourceHead": "12faead4636b97305348e25fc12258a56fcf6868",
  "evidence": {
    "path": ".context/ship-source-ai-delta-paid-20260910-v1/eng-plan-mode-diagnosis-ledger-v1/seeded-first-terminal.visible.log",
    "sha256": "c9abe6c170ea3ba44fc5d3493c510f508b77c91392d9e398a63d99f4edb02db9",
    "sessionId": "6f83f040-b1b5-4318-a6ab-c60de84f263b",
    "startCharacter": 37930,
    "endCharacter": 38080,
    "note": "Exact historical TODO excerpt from the first seeded attempt; current screen variants in tests are synthetic. Full retained raw/visible history remains in context; no paid pass is inferred."
  },
  "visibleReadExcerpt": "--timings/--shard once the repo unpins Bun 1.3.13.CIandthismachinearenowonBun1.4.0,sothatunpinhas\n  already happened and the item is ready to execute.",
  "reconstructedScreen": "  1. Existing code already solves this. bun run test already routes through scripts/test-free-shards.ts (1,631 lines),\n     which runs N concurrent shard processes, packs files by recorded durations (LPT), classifies every byte of child\n     output through scripts/test-strict-output.ts, kills wedged shards by process group, and serves the CI matrix via\n     --shards M --shard i. The paid suite has the same in scripts/test-paid-shards.ts. Both share runShardChild. All\n     four files the plan would duplicate have pinning tests today (test/test-free-shards.test.ts, \n     test/paid-shards.test.ts, test/strict-output.test.ts, test/run-shard-child.test.ts). The full free suite runs in\n     about 90 to 100 seconds for roughly 8,700 tests.\n  2. The \"ignore Bun's --shard\" line contradicts two written repo decisions. The runner header records decision V3/D6:\n     evaluate the Bun built-in first. TODOS.md has an open P2 item: swap the custom LPT packer for bun-native\n     --timings/--shard once the repo unpins Bun 1.3.13. CI and this machine are now on Bun 1.4.0, so that unpin has\n     already happened and the item is ready to execute.\n  3. Search check [Layer 1]. A live probe of the installed Bun 1.4.0 shows native --parallel=N, --shard=i/N,\n     --timings=<json>, --update-timings, --coverage, --reporter=junit, and --watch. That covers the plan's shard, merge,\n     coverage, watch, and progress files outright. Bun's own docs confirm timings-based LPT shard balancing composes\n     with --parallel (Bun test docs (https://bun.com/docs/test), Bun v1.3.13 release (https://bun.com/blog/bun-v1.3.13),\n     Jarred Sumner on --timings (https://x.com/jarredsumner/status/2084447410567409776), Bun test deep dive\n     (https://bunjs.run/bun-test-runner-deep-dive)).\n  4. Tests: \"none planned\" is a non-starter against your stated preference that well-tested code is non-negotiable, and\n     against the repo's pattern where every runner has a pinning test file.\n  5. Problem statement is missing. The plan never says what is slow or broken today. If there's a real pain (tail\n     latency, flaky shards, missing coverage output), that decides which of the options below is right.\n     \n  ---\n     \n  D1 \u2014 Rebuild the test runner, or retarget onto the one that exists?\n  (AskUserQuestion is unavailable in this host; reply with a letter.)\n \n  Project/branch/task: gstack on edinburgh-v1, reviewing the pasted \"Parallelize unit tests\" draft.\n \n  ELI10: The unit tests already run in parallel through a runner the repo has maintained and tested for months. The\n  draft plan proposes writing a second runner from scratch, in eight new files with three new classes, with no tests,\n  and deliberately skipping Bun's built-in sharding that the repo has an open ticket to adopt. The stakes: two runners\n  with different truth about what \"green\" means, a few thousand lines of untested duplicate code, and a reversal of two\n  recorded decisions without saying why.\n \n                                                                                \u2714 Update installed \u00b7 Restart to update\n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n\u276f\u00a0\n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n  \u23f8 plan mode on (shift+tab to cycle) \u00b7 esc to interrupt \u00b7 \u2190 for agents",
  "screenEvidence": {
    "rawPath": ".context/ship-source-ai-delta-paid-20260910-v1/eng-plan-mode-diagnosis-ledger-v1/seeded-first-terminal.raw.log",
    "rawSha256": "ca24635c511b114394b386e83a9c35409ceb36c967c71c92aefc432543fdfe15",
    "cols": 120,
    "rows": 40,
    "note": "Exact existing createPtyScreen rendering of the retained full raw terminal; no live current-screen artifact was originally recorded."
  }
}