{ "source": "04880a342078b697004a2fafac8f43322c684b5f", "sessionId": "b2d180fa-b050-4034-bc1b-41cc9a79fbde", "publicExport": ".context/sep12-ship-pooled-validation-draft/eng-permission-failure-public.json", "publicExportSha256": "2af18dd648aa714060ef081716185313c3031b8e5e14224e66088f198d117975", "frame": { "source": "last-sampled-current-screen", "text": " 314 D6 — Issue 4: cover the processWebhookJob() regression contract with unit tests only, or unit + integration against a fake receiver?\n 315 Recommendation: 4B. Completeness: A=7/10, B=10/10.\n 316 4A) Unit-only (mocked HTTP client) 4B) Unit + integration fake receiver (recommended)\n 317 \n 318 +## Section 4: Performance review \n 319 + \n 320 +**Finding 4.1 [P2] (confidence: 8/10) review-input.md:21-23 — Full payload \n 321 +re-fetch plus dependency-graph recompute on every retry.** Quoted: \"On every \n 322 +retry we re-fetch the full job payload from the database, then iterate the \n 323 +payload to recompute the dependency graph. Could cache the graph on the first \n 324 +attempt; not planned.\" Cost is `attempts × (payload fetch + O(n) graph \n 325 +walk)`. With R1, the library already re-hydrates the job payload when it \n 326 +re-enqueues, so the explicit re-fetch may be a second read of the same data \n 327 +(verify against the library). The graph recompute is pure work on \n 328 +unchanged input. Decision row R5. \n 329 + \n 330 +**Finding 4.2 [P3] (confidence: 6/10, medium: depends on payload size) — \n 331 +Memory.** Caching the graph on the job record grows the payload. Bounded by \n 332 +the graph size; acceptable unless graphs are large. Fold into R5 option \n 333 +design: cache the graph, or a cheap derived form, not the full payload copy. \n 334 + \n 335 +**Finding 4.3 [P3] (confidence: 7/10) — N+1 inside the graph walk.** If \n 336 +\"iterate the payload to recompute the dependency graph\" issues one query per \n 337 +node, each retry multiplies that N+1. Unverifiable here (no source). Flag for \n 338 +implementation: the walk should be a pure function over the already-loaded \n 339 +payload; if it queries, batch it. Requirement, not a new decision. \n 340 + \n 341 +| R5 | Dependency-graph recompute on retry | Plan: re-fetch payload and recompute graph on every attempt (review-input.md:21-23). Unmeasured. | A) Compute the graph on attempt 1, persist it on the job record (or a keyed ca\n +che with the job id), and reuse on retries; invalidate if payload version changes. B) Keep recompute-every-attempt as planned. | Finding 4.1, 4.2. | pending | R5 [pending]: current=recompute every attempt; A=compute once, \n +persist on job, reuse with version check; B=recompute every attempt (as planned) | \n 342 + \n 343 +### D7 brief (saved before asking) \n 344 +D7 — Issue 5: cache the dependency graph on the first attempt, or recompute on every retry as planned? \n 345 +Recommendation: 5A. Completeness: A=9/10, B=6/10. \n 346 +5A) Compute once, persist on job, reuse (recommended) 5B) Recompute every attempt (as planned) \n 347 + \n 348 ### D2 brief (saved before asking)\n 349 D2 — Retry mechanism: library hook + shared backoff fn, or custom inline scheduler?\n 350 Recommendation: A. Completeness: A=9/10, B=6/10.\n\n Ran 1 shell command \n\n● User answered Claude's questions:\n ⎿  · D7 — Issue 5: Should the dependency graph be computed once on the first attempt and reused on retries, or recomputed on every retry as planned?\n Project/branch/task: main branch; 'background job retry framework' plan, Performance section (review-input.md:21-23).\n ELI10: Every retry currently reloads the whole job payload and rebuilds the same dependency graph from it, even though the payload has not changed. Computing the graph once, saving it on the job record with a version stamp, and reusing\n it on later attempts removes that repeated work. If the payload does change, the stamp mismatch forces a rebuild.\n Stakes if we pick wrong: Recompute-always multiplies database reads and CPU by the attempt count exactly when the system is already unhealthy (that is why jobs are retrying); a cache without a version check could reuse a stale graph.\n Recommendation: 5A because retries happen under load, the input is immutable per job, and a version-stamped cache is explicit and a few lines with CC.\n Completeness: A=9/10, B=6/10\n Net: A small persisted field plus an invalidation check versus paying the full rebuild on every attempt during outages. → 5A Compute once, persist, reuse (recommended)\n\n● Update(gstack-test-plan-eng-batching.md)\n ⎿  Added 24 lines, removed 2 lines\n 338 implementation: the walk should be a pure function over the already-loaded\n 339 payload; if it queries, batch it. Requirement, not a new decision.\n 340 \n 341 -| R5 | Dependency-graph recompute on retry | Plan: re-fetch payload and recompute graph on every attempt (review-input.md:21-23). Unmeasured. | A) Compute the graph on attempt 1, persist it on the job record (or a keyed ca\n -che with the job id), and reuse on retries; invalidate if payload version changes. B) Keep recompute-every-attempt as planned. | Finding 4.1, 4.2. | pending | R5 [pending]: current=recompute every attempt; A=compute once, \n -persist on job, reuse with version check; B=recompute every attempt (as planned) | \n 341 +| R5 | Dependency-graph recompute on retry | Plan: re-fetch payload and recompute graph on every attempt (review-input.md:21-23). Unmeasured. | A) Compute the graph on attempt 1, persist it on the job record (or a keyed ca\n +che with the job id), and reuse on retries; invalidate if payload version changes. B) Keep recompute-every-attempt as planned. | Finding 4.1, 4.2. **Approved D7 = 5A** (user selected \"5A Compute once, persist, reuse\"). Sco\n +pe: compute the dependency graph on attempt 1, persist it on the job record keyed by a payload version/hash, reuse on retries, rebuild on mismatch. Tests for hit, miss, and invalidation. | accepted (5A) | R5 [D7=5A]: curre\n +nt=recompute every attempt; A=compute once, persist on job, reuse with version check; B=recompute every attempt (as planned) | \n 342 \n 343 -### D7 brief (saved before asking) \n 343 +### Accepted plan amendment (R5, D7=5A) \n 344 + \n 345 +**Performance (replaces original):** On attempt 1, compute the dependency \n 346 +graph and persist it on the job record alongside a `payloadVersion` \n 347 +(hash or monotonically increasing version of the payload). On retry, if the \n 348 +stored version matches the current payload version, reuse the graph and \n 349 +skip the walk; otherwise recompute and overwrite. Do not add a second \n 350 +explicit payload fetch if the library already re-hydrates the job on \n 351 +re-enqueue (verify during implementation; Finding 4.1). \n 352 + \n 353 +``` \n 354 +attempt k ──► job.graph && job.payloadVersion == hash(payload) ? \n 355 + │ yes │ no \n 356 + ▼ ▼ \n 357 + reuse graph walk payload → graph \n 358 + persist graph + version \n 359 +``` \n 360 + \n 361 +Required tests (proof of approved R5): cache hit skips the walk (spy on the \n 362 +walker); version mismatch rebuilds and overwrites; first attempt always \n 363 +computes; serialized graph round-trips. \n 364 + \n 365 +### D7 brief (asked, answered 5A) \n 366 D7 — Issue 5: cache the dependency graph on the first attempt, or recompute on every retry as planned?\n 367 Recommendation: 5A. Completeness: A=9/10, B=6/10.\n 368 5A) Compute once, persist on job, reuse (recommended) 5B) Recompute every attempt (as planned)\n\n● Update(~/.gstack/projects/gstack-e2e-plan-eng-batching-SAUd8d/vercel-sandbox-main-eng-review-test-plan-20260912-075333.md)\n ⎿  File must be read first\n\n Read 2 files, ran 1 shell command \n\n● Codex returned seven findings: two corrections to my text, one challenge to approved rows, and four new decision rows. I'll save the verbatim output, corrections, and new rows to the plan, and update the artifact's pending line. \n · summarized\n\n● Update(~/.gstack/projects/gstack-e2e-plan-eng-batching-SAUd8d/vercel-sandbox-main-eng-review-test-plan-20260912-075333.md)\n\n────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────\n Edit file\n ../../../../home/vercel-sandbox/.gstack/projects/gstack-e2e-plan-eng-batching-SAUd8d/vercel-sandbox-main-eng-review-test-plan-20260912-075333.md\n╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌\n 25 - Behavior-preserving refactor step: regression suite passes unchanged before retries are wired.\n 26 \n 27 ## Pending Decisions\n 28 -- R5 (dependency-graph caching on retry) pending at time of writing; performance test depth follows its answer. \n 28 +- R5 accepted (5A): verify cached graph is reused on retry (walker not called) and rebuilt when the payload version changes. \n 29 +- Outside-voice rows R6-R11 (worker idempotency audit, id-to-snapshot binding, cache key schema version, rollout sequence, delay precedence, overload bounds) pending at time of writing; see the plan file ledger for final dispositions. \n╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌\n Do you want to make this edit to vercel-sandbox-main-eng-review-test-plan-20260912-075333.md?\n ❯ 1. 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