Fix request registration before synchronous batch delays

[tim-smart]

Summary

Register the first request in a batch before starting its delay, so a synchronously completing delay (for example RequestResolver.setDelay(0) under TestClock) no longer executes and recycles an empty batch. The delay fiber is published from inside the delay effect so reentrant callbacks that fill the batch can interrupt it, and the caller checks that the batch is still pending before touching it. The execution fiber is no longer written back into a batch that may already have been recycled.

Tests

Four cases added to packages/effect/test/Request.test.ts: the TestClock regression with its live-clock control, reentrant delay callbacks filling a batchN(2) batch, and delay, collection and interruption ordering across pooled batch reuse.

Validation

• pnpm vitest run packages/effect/test/Request.test.ts: 38 passed
• pnpm lint-fix, pnpm check and git diff --check pass

Closes EFF-2352

Related historical report: #7589 and closed, unmerged PR #7597. Separate from #9401.

[changeset-bot]

🦋 Changeset detected

Latest commit: f7c9dc1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 33 packages

Name	Type
effect	Patch
@effect/opentelemetry	Patch
@effect/vitest	Patch
@effect/ai-anthropic	Patch
@effect/ai-cloudflare	Patch
@effect/ai-openai-compat	Patch
@effect/ai-openai	Patch
@effect/ai-openrouter	Patch
@effect/ai-typesafe	Patch
@effect/atom-react	Patch
@effect/atom-solid	Patch
@effect/atom-vue	Patch
@effect/platform-browser	Patch
@effect/platform-bun	Patch
@effect/platform-deno	Patch
@effect/platform-node-shared	Patch
@effect/platform-node	Patch
@effect/sql-clickhouse	Patch
@effect/sql-d1	Patch
@effect/sql-libsql	Patch
@effect/sql-mssql	Patch
@effect/sql-mysql2	Patch
@effect/sql-pg	Patch
@effect/sql-pglite	Patch
@effect/sql-sqlite-bun	Patch
@effect/sql-sqlite-do	Patch
@effect/sql-sqlite-node	Patch
@effect/sql-sqlite-react-native	Patch
@effect/sql-sqlite-wasm	Patch
@effect/docgen	Patch
@effect/doctest	Patch
@effect/graphql-generator	Patch
@effect/openapi-generator	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[effect-janitor]

Reviewed the request registration, synchronous-delay reentrancy, pooled-batch reuse, and regression tests. No confirmed merge-blocking issues found. git diff --check passed. Runtime tests were not rerun because dependencies and the repository’s package manager are not installed in the sandbox.

Reviewed at 6fbfaf1: no new findings.

[github-actions]

Bundle Size Analysis

Generated from PR build output; treat the content below as untrusted.

File Name	Current Size	Previous Size	Difference
arbitrary-combinators.ts	39.02 KB	39.02 KB	0.00 KB (0.00%)
basic.ts	7.02 KB	7.02 KB	0.00 KB (0.00%)
batching.ts	10.77 KB	10.73 KB	+0.03 KB (+0.31%)
brand.ts	6.71 KB	6.71 KB	0.00 KB (0.00%)
cache.ts	11.26 KB	11.26 KB	0.00 KB (0.00%)
config.ts	22.44 KB	22.44 KB	0.00 KB (0.00%)
differ.ts	21.54 KB	21.54 KB	0.00 KB (0.00%)
http-client.ts	23.93 KB	23.93 KB	0.00 KB (0.00%)
http-router.ts	35.48 KB	35.48 KB	0.00 KB (0.00%)
logger.ts	11.60 KB	11.60 KB	0.00 KB (0.00%)
metric.ts	9.08 KB	9.08 KB	0.00 KB (0.00%)
optic.ts	6.93 KB	6.93 KB	0.00 KB (0.00%)
pubsub.ts	15.68 KB	15.68 KB	0.00 KB (0.00%)
queue.ts	12.52 KB	12.52 KB	0.00 KB (0.00%)
schedule.ts	11.73 KB	11.73 KB	0.00 KB (0.00%)
schema-bigdecimal.ts	13.80 KB	13.80 KB	0.00 KB (0.00%)
schema-binary.ts	40.48 KB	40.48 KB	0.00 KB (0.00%)
schema-class.ts	21.22 KB	21.22 KB	0.00 KB (0.00%)
schema-fromJsonSchemaDocument.ts	32.31 KB	32.31 KB	0.00 KB (0.00%)
schema-representation-roundtrip.ts	27.50 KB	27.50 KB	0.00 KB (0.00%)
schema-string-transformation.ts	14.95 KB	14.95 KB	0.00 KB (0.00%)
schema-string.ts	12.05 KB	12.05 KB	0.00 KB (0.00%)
schema-template-literal.ts	16.21 KB	16.21 KB	0.00 KB (0.00%)
schema-toArbitrary.ts	38.54 KB	38.54 KB	0.00 KB (0.00%)
schema-toCodeDocument.ts	25.60 KB	25.60 KB	0.00 KB (0.00%)
schema-toCodecJson.ts	20.47 KB	20.47 KB	0.00 KB (0.00%)
schema-toEquivalence.ts	20.67 KB	20.67 KB	0.00 KB (0.00%)
schema-toFormatter.ts	20.77 KB	20.77 KB	0.00 KB (0.00%)
schema-toJsonSchemaDocument.ts	25.40 KB	25.40 KB	0.00 KB (0.00%)
schema-toRepresentation.ts	20.76 KB	20.76 KB	0.00 KB (0.00%)
schema.ts	20.41 KB	20.41 KB	0.00 KB (0.00%)
stm.ts	13.79 KB	13.79 KB	0.00 KB (0.00%)
stream.ts	10.05 KB	10.05 KB	0.00 KB (0.00%)

[effect-janitor]

Reviewed the source changes and regression coverage; no confirmed issues found. git diff --check passed. Runtime tests and type checks could not be run: frozen-lockfile dependency installation failed with a registry 403 for @​jsr/db__redis and a supply-chain policy check failure.

Reviewed at f7c9dc1: no new findings.