- supersedes Phases B and C as built: a store-after-completion
middleware cannot satisfy three of the story's seven criteria
- in-flight collision is undetectable (the row is written after the
handler ran, so concurrent duplicates both miss and both execute)
- the 10s in-flight heuristic is inverted: created_at is stamped at
store time, so it fires on legitimate fast replays and never on a
genuinely concurrent request
- "reused key, different body is refused" is unreachable while the
digest is folded into the key — nothing looks the bare key up
- design: sharded actor pool serializes per key, @table persists;
actors own volatile state, tables own durability. Inherited by
porch 2 and 3
- limiter joins the pool for exact counting, writes through instead of
delete+insert, keys on net.peer unless trust_proxy is declared, and
uses monotonic ticks for arithmetic but wall clock for the header
- idempotency blocks rather than answering 409: call parks the
duplicate until the owner reports. Digest becomes a column
- saturation fails closed with 503 for both: saturating the pool must
not become the limiter bypass
- records that the story's "time.after is still reserved" is stale;
spawn/send/call/monitor/time.after all landed
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
(cherry picked from commit fc09e94373db65837ff5eb620fec67bab02c1931)
shoney.arickathil
9f2d19083e