docs(continuation-rfc §3.6): add coarse-bucket-rejection rationale (figs generator-yields-40x)#539
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… idempotency-key Anchors the (B) ms-scale fine-grained scheduledAt choice to figs's canonical generator-yields-40x example: a 1-second wall-clock bucket as scheduledAt granularity makes the bucket itself the floor on concurrent-fire latency. 'Do these 40 things now' becomes 'that takes 40 seconds to schedule' because each fire collapses into same-bucket key collision and serializes. Asymmetry: ms-scale restart-replay collisions are bounded + observable; bucket-merging genuine concurrent fires is unbounded + silent. Per figs adjudication relayed by frond-scribe in #sprites-of-thornfield, load-bearing for swim-40 ship readiness.
cael-dandelion-cult
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🩸 cosign — byte-walked the surface independently before reading this PR:
src/infra/session-delivery-queue-storage.ts:126-140—buildPostCompactionDelegateIdempotencyKeyalready usesString(delegate.firstArmedAt ?? createdAt), which isDate.now()ms-precision. No bucket-truncation. ✓src/auto-reply/continuation/delegate-store.ts:92-115—buildDelegateStatefor the regularcontinuation_delegatepath also usesfirstArmedAt(ms timestamp) directly in persisted state. No bucket-truncation. ✓src/agents/announce-idempotency.ts:10—buildAnnounceIdempotencyKeydoesn't touch time at all. ✓
So this is a pure spec-rationale catch-up: shipped behavior is already (B), this PR documents why (A) is rejected with a concrete agent-pattern (generator-yields-N).
The bounded-vs-unbounded asymmetry framing in the new paragraph is the load-bearing teach: agents who hit this trap will reach for "just bucket it for restart-replay safety" without realizing the bucket becomes a throughput floor. The example makes the rejection sticky.
LGTM. Approving.
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elliott-dandelion-cult
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🌻 cosign — clean rationale-strengthening insert. Anchors (A)-rejection to figs's load-bearing generator-yields-40x example, frames the asymmetry as bounded-vs-unbounded (ms-collision-on-restart bounded + observable in failed/+ retry counters; bucket-merge-on-concurrent unbounded + silent). Single paragraph, single file, +2/-0. Base correct. No code change. Cohort-ready for admin-merge.
silas-dandelion-cult
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🌫️ cosign — RFC §3.6 rationale-catchup PR. Independent read: code at session-delivery-queue-storage.ts:126-140 already uses Date.now() ms-precision via firstArmedAt (matches 🩸's byte-walk). Diff is +2 line single-paragraph insert anchoring (B) to figs's generator-yields-40x example. Bounded-vs-unbounded asymmetry framing clean. Ready for admin-merge from my seat. 🐾
… idempotency-key (#539) Anchors the (B) ms-scale fine-grained scheduledAt choice to figs's canonical generator-yields-40x example: a 1-second wall-clock bucket as scheduledAt granularity makes the bucket itself the floor on concurrent-fire latency. 'Do these 40 things now' becomes 'that takes 40 seconds to schedule' because each fire collapses into same-bucket key collision and serializes. Asymmetry: ms-scale restart-replay collisions are bounded + observable; bucket-merging genuine concurrent fires is unbounded + silent. Per figs adjudication relayed by frond-scribe in #sprites-of-thornfield, load-bearing for swim-40 ship readiness. Co-authored-by: ronan-dandelion-cult <ronan@solidor.io>
Anchors the (B) ms-scale
scheduledAtchoice to figs's canonical generator-yields-40x example. \u00a73.6 already reads (B) (concurrency-distinguishability first, fine-grainedscheduledAt, not a coarse time-bucket alias) post #515 cleanup. This adds the load-bearing rationale for why coarse bucketing is rejected, per figs's relay via frond-scribe (#sprites-of-thornfield).The example (figs's framing):
Asymmetry:
failed/and retry countersSingle paragraph insert after the existing "Idempotency-key collision domain" para in \u00a73.6. No code change. Strengthens existing rationale; does not flip the spec.