[KyleAMathews]

🎯 Changes

Ordinary and resumed Collection subscriptions now start a source left deferred by an abandoned React render. Previously, those consumers could remain loading until another caller preloaded the source.

Independent demand records its intent, requests sync, then releases the render deferral. A render that never commits still starts no provider work. Cleanup from a synchronous startup callback can retire that start. Admission does not start a replacement implicitly. A subscriber that survives cleanup retains demand for an explicit restart.

During active cleanup, ordinary subscription admission and deferred acquisition resumption throw CollectionStateError before changing ownership. Call await collection.cleanup() and retry explicitly. This also applies when GC started cleanup. Deferred logical subscriptions can remain without starting work. Effects created during cleanup return disposed handles and report the cause through onSourceError.

Ordinary hooks keep a returned source error readable through status and isError. Deferred handoff no longer rethrows a recorded error merely because the source has error status. Actual synchronous startup throws remain fail-fast. Explicit DbClient preloads still report source startup failures, including when graph demand released the gate first. The handoff attempts every source before reporting its first failure.

Failed observer attachment releases each acquired channel, including channels registered before the Collection subscription exists. A reentrant listener cannot retain a failed physical attachment. A later explicit subscription can attach again. Pooled queries own their status release before cleanup registration can invoke a synchronous callback. Cleanup remains terminal for dependent queries.

A Suspense preload starts local acquisition while a server query stream remains pending. Server rows remain visible until browser acquisition completes. The SSR guide explains matching loader/hook config forms, indexes before compilation, and preload ownership. Explicit query keys require config objects in both loader and hook.

The branch includes merged main and #2233. The oracle skills require each affected public receiving path to run before production edits. Setup errors and missing witnesses block that gate. Source reading remains required after handoffs when definitions are absent.

🔬 Oracle coverage and review evidence

The versioned migration audit preserves the original feedback and both follow-up reviews. The coverage map names each primary owner and remaining witness.

The latest ten-finding audit records six addressed items, one approved demand policy, one refuted simplification, and two unresolved failure consequences. Both hooks reproduce the original error-boundary and retained-owner bugs. Their fix removes the broad handoff throw. Extra hook rollback guards proved unnecessary in the exercised histories and were removed.

Generated histories now vary error origin and timing, returned and thrown callbacks, absent causes, early registration failure, surviving peers, and repeated failed attempts. Core and real React drivers share the start-handoff judgment. Each property declares required reach and runs equal fixed/random budgets. Four new guarded receiving replays pass. Each selects one hook and observation. Original defects and narrow observer fixes fail the intended error, ownership, or acquisition assertions.

Existing owners also retain cleanup admission, resumption retirement, 192 interrupted ownership histories, pooled lifecycle cases, and stream handoff. Ordered replay coverage distinguishes demand by subscription and predicate. Its generated campaigns reject source-wide, subscription-blind, always-terminal, and ignored-ordinary-failure designs. Removing rank movement fails required reach. The audit records exact commands, counts, source identities, historical chronology gaps, and finite limits.

✅ Verification and remaining decisions

• I have tested this code locally with pnpm test.

Scoped checks pass. From packages/db:

pnpm exec vitest run tests/collection tests/db-client.test.ts tests/effect \
  tests/live-query tests/query/pooled-live-query \
  tests/query/load-subset-replay-refinement-oracle.test.ts \
  --coverage.enabled=false \
  --pool-options.threads.maxThreads=2 --pool-options.threads.minThreads=1

The implementation revision 83bd08ded passed 2,816 tests in 54 runner entries with no type or unhandled errors. The observer owner also passes its final 30-test reach check. Replay protocol and manifest checks pass. From packages/react-db:

pnpm exec vitest run --coverage.enabled=false \
  --pool-options.threads.maxThreads=2 --pool-options.threads.minThreads=1

React now passes 466 tests in 23 files. Eight receiving campaigns independently check both hooks across failures before and during commit. They observe isError, source starts, and ownership after unmount. Restoring the reviewed defect fails all eight campaigns at the intended assertions. Controlled clocks preserve both abandoned-render GC checks. The current pass changes no production code. The deferred-acquisition owner and DbClient also pass 580 tests in two files. Scoped ESLint has no errors. Prettier, git diff --check, and the 418-name private-member cache check pass. Earlier integration passed 64 persistence readiness tests.

pnpm size:compare --packages db,react-db --files compares with merged main 65d9ada50. The db package grows by 175 gzip and 233 brotli bytes. React remains unchanged. The typical app grows by 175 gzip bytes. Other app scenarios grow by 160–174 gzip bytes.

Refactors merge observer channel ownership and remove a duplicate resumption guard. Removing the current-demand OR breaks one ownership assertion. Removing the positive-count guard breaks four reentrant retirement assertions. Removing the unneeded hook rollback guards saves 22 gzip bytes from React. The remaining growth funds the error-provenance and ownership laws. The versioned audit records each experiment and separates tests from shipped code.

The earlier warm-source SSR hydration mismatch still needs an initial-snapshot policy. The Date typing report needs its failing assignment and dependency versions. Two new claims need legal failing traces: recoverable pooled subscription throws and demand stranded beyond replacement readiness after a notification throw. Supported recovery paths currently pass. These gaps remain explicit.

The pushed head is 90a30827f. Its CI run is pending. All 26 checks passed on prior head 1d1ac0170. At parent 929c1d418, 24 checks passed. Browser dependency installation timed out there and on merged main before application assertions ran. CodeRabbit remains paused and last reviewed da37bc9bb. Its check does not cover the later changes.

The PR remains not ready because the demonstrated SSR mismatch needs its product decision. Review accounting and scoped GREEN results do not resolve that decision.

🚀 Release impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

• Bug Fixes
  • Collections resume synchronization when a new subscriber requests data after a suspended or abandoned render. The new subscriber can receive current data.
  • Subscriptions and deferred acquisition resumption are rejected during active cleanup. Callers can retry after cleanup settles.
  • Effects created during cleanup are disposed and do not partially subscribe or produce batches. Later explicit Effect construction can start fresh.
• Documentation
  • Added server-side rendering guidance for reusing preloaded live-query results, preparing indexes, and managing preload lifetime and cleanup.
  • Expanded lifecycle guidance and test coverage for suspended renders, subscription cleanup, and later synchronization demand.

[changeset-bot]

🦋 Changeset detected

Latest commit: 90a3082

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

This PR includes changesets to release 24 packages

Name	Type
@tanstack/db	Patch
@tanstack/angular-db	Patch
@tanstack/capacitor-db-sqlite-persistence-e2e-app	Patch
@tanstack/db-sqlite-persistence-core	Patch
@tanstack/electric-db-collection	Patch
@tanstack/expo-db-sqlite-persistence-e2e-app	Patch
@tanstack/offline-transactions	Patch
@tanstack/powersync-db-collection	Patch
@tanstack/query-db-collection	Patch
@tanstack/react-db	Patch
@tanstack/rxdb-db-collection	Patch
@tanstack/solid-db	Patch
@tanstack/svelte-db	Patch
@tanstack/tauri-db-sqlite-persistence-e2e-app	Patch
@tanstack/trailbase-db-collection	Patch
@tanstack/vue-db	Patch
@tanstack/browser-db-sqlite-persistence	Patch
@tanstack/capacitor-db-sqlite-persistence	Patch
@tanstack/cloudflare-durable-objects-db-sqlite-persistence	Patch
@tanstack/electron-db-sqlite-persistence	Patch
@tanstack/expo-db-sqlite-persistence	Patch
@tanstack/node-db-sqlite-persistence	Patch
@tanstack/react-native-db-sqlite-persistence	Patch
@tanstack/tauri-db-sqlite-persistence	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

[github-actions]

Incremental update benchmark

Comparing 77d93dbf2 (this PR) against 65d9ada50 (base). Write times are per-write medians over 100 iterations (20 warmup writes). Cold hydrate is one timed first load of each query.

Overall median write time vs base: 0.98× · cold hydrate time: 0.99× (geometric mean of per-case ratios; lower is faster).

Writes: 0 regression(s), 2 improvement(s) (threshold: ±20% and >0.05ms).

Cold hydrate: 1 regression(s), 1 improvement(s) (threshold: ±50% and >5ms).

_{Per-case flags are noisy on shared runners. Read the geometric means first.}

Writes

Query	Δ median write time (geomean)	Best case	Worst case	Flags
list: newest 50 open	-2.4%	-30.2%	+21.8%	—
list + author	-3.6%	-46.8%	+25.7%	1 🟢
list + comment count	-0.5%	-13.6%	+18.4%	—
list + 3 recent comments	+1.5%	-5.5%	+28.0%	—
issue detail + comments	-4.9%	-35.6%	+2.5%	1 🟢

Cold hydrate

Query	Δ cold hydrate time (geomean)	Best case	Worst case	Flags
list: newest 50 open	-4.3%	-42.7%	+62.2%	—
list + author	-18.3%	-78.8%	+52.7%	1 🟢
list + comment count	-1.8%	-19.9%	+18.4%	—
list + 3 recent comments	-4.1%	-23.8%	+36.2%	—
issue detail + comments	+30.6%	-14.9%	+1992.1%	1 🔴

Each row aggregates the 14.4 scale/index/write-mode configurations of that query; per-configuration tables below.

100 rows/collection | source indexes: none | synced writes — geomean 0.96×, cold 1.00×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.172ms	0.176ms	+2.0%	0.302ms	0.303ms	+0.3%		12.685ms	13.641ms	+7.5%
list: newest 50 open	0.493ms	0.446ms	-9.6%	0.709ms	0.824ms	+16.3%		3.369ms	2.969ms	-11.9%
list + author	0.178ms	0.180ms	+1.1%	0.321ms	0.305ms	-4.9%		8.733ms	8.871ms	+1.6%
list + comment count	0.378ms	0.327ms	-13.6%	0.611ms	0.508ms	-16.8%		11.447ms	10.954ms	-4.3%
list + 3 recent comments	0.206ms	0.201ms	-2.0%	0.362ms	0.357ms	-1.2%		11.542ms	10.149ms	-12.1%
issue detail + comments	0.137ms	0.140ms	+2.0%	0.257ms	0.251ms	-2.5%		1.577ms	1.911ms	+21.2%

100 rows/collection | source indexes: none | optimistic writes — geomean 1.08×, cold 1.03×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.113ms	0.114ms	+0.6%	0.213ms	0.201ms	-5.6%		2.762ms	1.727ms	-37.5%
list: newest 50 open	0.072ms	0.070ms	-1.9%	0.147ms	0.131ms	-11.0%		1.594ms	2.052ms	+28.7%
list + author	0.134ms	0.169ms	+25.7%	0.268ms	0.277ms	+3.5%		3.273ms	4.998ms	+52.7%
list + comment count	0.202ms	0.206ms	+1.7%	0.387ms	0.366ms	-5.5%		3.816ms	3.816ms	+0.0%
list + 3 recent comments	0.118ms	0.151ms	+28.0%	0.227ms	0.222ms	-2.2%		7.247ms	8.487ms	+17.1%
issue detail + comments	0.103ms	0.104ms	+0.6%	0.232ms	0.230ms	-0.8%		0.977ms	0.831ms	-14.9%

100 rows/collection | source indexes: manual | synced writes — geomean 1.01×, cold 0.89×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.116ms	0.110ms	-4.7%	0.234ms	0.152ms	-35.1%		2.869ms	2.954ms	+3.0%
list: newest 50 open	0.371ms	0.356ms	-4.1%	0.661ms	0.677ms	+2.4%		1.591ms	1.288ms	-19.1%
list + author	0.103ms	0.127ms	+23.6%	0.203ms	0.234ms	+15.0%		4.206ms	2.591ms	-38.4%
list + comment count	0.224ms	0.226ms	+1.0%	0.421ms	0.431ms	+2.4%		3.577ms	3.243ms	-9.3%
list + 3 recent comments	0.148ms	0.145ms	-1.9%	0.296ms	0.289ms	-2.4%		4.574ms	4.492ms	-1.8%
issue detail + comments	0.104ms	0.100ms	-4.0%	0.220ms	0.198ms	-10.3%		0.585ms	0.616ms	+5.3%

100 rows/collection | source indexes: manual | optimistic writes — geomean 1.00×, cold 0.88×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.085ms	0.085ms	-0.4%	0.152ms	0.171ms	+12.5%		1.495ms	1.177ms	-21.2%
list: newest 50 open	0.068ms	0.066ms	-2.4%	0.138ms	0.149ms	+7.8%		1.098ms	0.926ms	-15.7%
list + author	0.113ms	0.118ms	+4.2%	0.208ms	0.226ms	+8.5%		2.732ms	2.217ms	-18.8%
list + comment count	0.184ms	0.193ms	+5.1%	0.325ms	0.330ms	+1.3%		2.922ms	3.461ms	+18.4%
list + 3 recent comments	0.104ms	0.100ms	-3.8%	0.198ms	0.188ms	-5.4%		5.774ms	4.398ms	-23.8%
issue detail + comments	0.085ms	0.083ms	-2.7%	0.127ms	0.119ms	-6.2%		0.567ms	0.558ms	-1.6%

1,000 rows/collection | source indexes: none | synced writes — geomean 0.87×, cold 0.90×, 1 change(s)

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.091ms	0.064ms	-30.2%	0.145ms	0.133ms	-8.5%		11.404ms	6.530ms	-42.7%
list: newest 50 open	1.048ms	1.040ms	-0.8%	1.386ms	2.025ms	+46.1%		6.743ms	6.228ms	-7.6%
list + author	0.086ms	0.085ms	-1.0%	0.108ms	0.130ms	+19.7%		18.972ms	19.683ms	+3.7%
list + comment count	0.173ms	0.161ms	-7.0%	0.244ms	0.240ms	-1.4%		9.943ms	9.093ms	-8.5%
list + 3 recent comments	0.141ms	0.145ms	+3.0%	0.183ms	0.277ms	+51.3%		9.135ms	9.297ms	+1.8%
issue detail + comments	0.177ms	0.114ms	-35.6%	0.257ms	0.155ms	-39.6%	🟢	1.196ms	1.275ms	+6.6%

1,000 rows/collection | source indexes: none | optimistic writes — geomean 0.88×, cold 0.96×, 1 change(s)

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.128ms	0.141ms	+10.3%	0.173ms	0.262ms	+51.5%		5.547ms	8.081ms	+45.7%
list: newest 50 open	0.068ms	0.051ms	-26.1%	0.112ms	0.102ms	-8.7%		6.803ms	7.378ms	+8.5%
list + author	0.189ms	0.100ms	-46.8%	0.246ms	0.146ms	-40.4%	🟢	37.779ms	19.113ms	-49.4%
list + comment count	0.172ms	0.204ms	+18.4%	0.296ms	0.312ms	+5.7%		9.309ms	9.423ms	+1.2%
list + 3 recent comments	0.096ms	0.091ms	-5.5%	0.179ms	0.172ms	-3.8%		10.459ms	10.085ms	-3.6%
issue detail + comments	0.085ms	0.081ms	-4.2%	0.114ms	0.151ms	+32.4%		1.244ms	1.214ms	-2.4%

1,000 rows/collection | source indexes: manual | synced writes — geomean 0.97×, cold 1.07×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.063ms	0.059ms	-6.7%	0.080ms	0.075ms	-6.7%		1.238ms	1.196ms	-3.3%
list: newest 50 open	0.288ms	0.319ms	+11.0%	0.562ms	0.575ms	+2.3%		0.887ms	1.426ms	+60.7%
list + author	0.096ms	0.083ms	-13.6%	0.190ms	0.156ms	-17.9%		1.792ms	1.793ms	+0.1%
list + comment count	0.198ms	0.194ms	-2.1%	0.235ms	0.247ms	+4.8%		2.809ms	3.029ms	+7.8%
list + 3 recent comments	0.125ms	0.119ms	-5.3%	0.245ms	0.138ms	-43.6%		5.538ms	5.027ms	-9.2%
issue detail + comments	0.089ms	0.087ms	-2.5%	0.108ms	0.103ms	-4.5%		0.430ms	0.414ms	-3.7%

1,000 rows/collection | source indexes: manual | optimistic writes — geomean 0.95×, cold 0.93×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.076ms	0.069ms	-9.5%	0.142ms	0.087ms	-39.0%		0.824ms	0.795ms	-3.5%
list: newest 50 open	0.059ms	0.056ms	-5.3%	0.087ms	0.094ms	+7.7%		0.925ms	0.843ms	-8.9%
list + author	0.098ms	0.093ms	-5.3%	0.134ms	0.195ms	+45.3%		2.164ms	1.908ms	-11.8%
list + comment count	0.164ms	0.160ms	-2.5%	0.319ms	0.209ms	-34.6%		2.758ms	2.721ms	-1.3%
list + 3 recent comments	0.101ms	0.097ms	-3.9%	0.139ms	0.112ms	-19.4%		4.423ms	3.831ms	-13.4%
issue detail + comments	0.084ms	0.082ms	-2.2%	0.122ms	0.118ms	-3.4%		0.378ms	0.378ms	+0.0%

10,000 rows/collection | source indexes: none | synced writes — geomean 0.97×, cold 0.96×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.063ms	0.059ms	-6.3%	0.087ms	0.079ms	-10.0%		71.970ms	72.190ms	+0.3%
list: newest 50 open	10.604ms	10.366ms	-2.2%	11.522ms	11.124ms	-3.5%		77.157ms	68.145ms	-11.7%
list + author	0.103ms	0.095ms	-7.6%	0.188ms	0.180ms	-4.0%		209.093ms	214.357ms	+2.5%
list + comment count	0.179ms	0.165ms	-7.7%	0.330ms	0.243ms	-26.5%		73.944ms	74.706ms	+1.0%
list + 3 recent comments	0.113ms	0.123ms	+8.3%	0.225ms	0.250ms	+11.0%		115.266ms	88.458ms	-23.3%
issue detail + comments	0.086ms	0.085ms	-0.3%	0.113ms	0.115ms	+2.0%		6.139ms	6.772ms	+10.3%

10,000 rows/collection | source indexes: none | optimistic writes — geomean 1.05×, cold 0.98×

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.074ms	0.088ms	+18.9%	0.134ms	0.175ms	+31.1%		68.484ms	61.381ms	-10.4%
list: newest 50 open	0.048ms	0.049ms	+2.7%	0.075ms	0.092ms	+22.9%		66.337ms	65.069ms	-1.9%
list + author	0.095ms	0.098ms	+3.1%	0.135ms	0.121ms	-9.9%		198.145ms	203.090ms	+2.5%
list + comment count	0.188ms	0.198ms	+5.5%	0.354ms	0.237ms	-33.0%		77.700ms	80.368ms	+3.4%
list + 3 recent comments	0.093ms	0.094ms	+0.8%	0.136ms	0.187ms	+37.0%		75.279ms	75.050ms	-0.3%
issue detail + comments	0.082ms	0.084ms	+2.4%	0.118ms	0.106ms	-9.6%		5.095ms	4.874ms	-4.4%

10,000 rows/collection | source indexes: manual | synced writes — geomean 1.01×, cold 0.76×, 1 change(s)

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.061ms	0.074ms	+21.8%	0.076ms	0.107ms	+39.8%		1.793ms	2.908ms	+62.2%
list: newest 50 open	0.943ms	0.920ms	-2.4%	1.516ms	1.183ms	-22.0%		2.363ms	1.670ms	-29.3%
list + author	0.087ms	0.084ms	-3.4%	0.172ms	0.115ms	-33.3%		15.961ms	3.390ms	-78.8%	🟢
list + comment count	0.197ms	0.191ms	-2.7%	0.264ms	0.234ms	-11.2%		5.046ms	4.042ms	-19.9%
list + 3 recent comments	0.126ms	0.128ms	+1.3%	0.161ms	0.170ms	+5.7%		5.335ms	5.182ms	-2.9%
issue detail + comments	0.100ms	0.092ms	-7.8%	0.200ms	0.126ms	-37.0%		0.563ms	0.585ms	+3.9%

10,000 rows/collection | source indexes: manual | optimistic writes — geomean 1.01×, cold 1.70×, 1 change(s)

Query	Base median	PR median	Δ median	Base p95	PR p95	Δ p95		Base cold	PR cold	Δ cold
list: newest 50 open	0.082ms	0.085ms	+3.5%	0.175ms	0.184ms	+4.8%		2.876ms	2.712ms	-5.7%
list: newest 50 open	0.061ms	0.060ms	-1.3%	0.116ms	0.120ms	+3.5%		1.887ms	1.613ms	-14.5%
list + author	0.097ms	0.096ms	-0.7%	0.118ms	0.127ms	+7.8%		3.402ms	3.738ms	+9.9%
list + comment count	0.213ms	0.217ms	+1.9%	0.388ms	0.398ms	+2.6%		3.745ms	3.576ms	-4.5%
list + 3 recent comments	0.112ms	0.115ms	+2.9%	0.218ms	0.141ms	-35.3%		4.907ms	6.682ms	+36.2%
issue detail + comments	0.092ms	0.094ms	+2.5%	0.152ms	0.116ms	-23.5%		0.569ms	11.915ms	+1992.1%	🔴

_{Runner: node v24.8.0, linux 6.17.0-1022-azure, Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz. Timings on shared CI runners are noisy; treat small deltas as indicative only.}

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📒 Files selected for processing: 19

• .changeset/resume-independent-subscription-demand.md
• docs/contributing/oracle-coverage.md
• docs/contributing/oracle-reviews/2026-10-22-dbclient-migration-feedback.md
• packages/db/mangle-cache.json
• packages/db/src/collection/changes.ts
• packages/db/src/collection/lifecycle.ts
• packages/db/src/collection/subscription.ts
• packages/db/src/live-query-observer.ts
• packages/db/src/live-query-options.ts
• packages/db/src/query/pooled-live-query.ts
• packages/db/tests/collection-cleanup-restart-oracle.test.ts
• packages/db/tests/collection-subscription-lifecycle-grammar-oracle.ts
• packages/db/tests/collection-subscription-lifecycle-oracle.test.ts
• packages/db/tests/db-client.test.ts
• packages/db/tests/live-query-deferred-acquisition-oracle.test.ts
• packages/db/tests/live-query-observer-history-oracle.property.test.ts
• packages/db/tests/query/pooled-live-query-gc-oracle.test.ts
• packages/react-db/tests/descriptor-query-binding-oracle.test.tsx
• packages/react-db/tests/useLiveSuspenseQuery.test.tsx

🚧 Files skipped from review as they are similar to previous changes: 2

• .changeset/resume-independent-subscription-demand.md
• docs/contributing/oracle-coverage.md

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📝 Walkthrough

Ordinary subscriptions now request sync startup and reject admission during active cleanup. Deferred acquisition and query setup release ownership when cleanup interrupts startup. Tests cover cleanup, restart, observer ownership, suspended-render demand, and streaming cases. Documentation adds lifecycle and SSR guidance.

Changes: Subscription lifecycle and migration

Layer / File(s)	Summary
Subscription admission and restart behavior packages/db/src/collection/changes.ts, packages/db/src/collection/lifecycle.ts, packages/db/src/collection/subscription.ts, packages/db/tests/collection-subscription-lifecycle-grammar-oracle.ts, packages/db/tests/collection-subscription-lifecycle-oracle.test.ts, packages/db/tests/collection-subscription.test.ts, packages/db/tests/collection-cleanup-restart-oracle.test.ts, packages/db/tests/db-client.test.ts	Admission and deferred acquisition resumption now reject during active cleanup. Ordinary demand requests sync startup. Cleanup-promise handling changes when a replacement run starts. Core tests cover cleanup timing, admission, deferred resumption, and later restarts.
Cleanup-aware query startup and ownership packages/db/src/query/effect.ts, packages/db/src/live-query-observer.ts, packages/db/src/query/pooled-live-query.ts, packages/db/tests/collection-cleanup-restart-oracle.test.ts, packages/db/tests/live-query-observer-history-oracle.property.test.ts, packages/db/tests/query/pooled-live-query-gc-oracle.test.ts	Effect startup registers cleanup observation before subscription admission. Observer and pooled-query setup release partial ownership when setup fails or cleanup interrupts startup. Tests cover disposed Effects and released observer and partition leases.
Deferred acquisition and suspended-render demand packages/db/src/live-query-options.ts, packages/db/tests/live-query-deferred-acquisition-oracle.test.ts, packages/react-db/tests/descriptor-query-binding-oracle.test.tsx, packages/react-db/tests/useLiveSuspenseQuery.test.tsx	Deferred resumption reports committed demand and detects sync errors after independent demand releases a render gate. Tests cover deferred readers, cleanup histories, preloads, streaming, and later source reuse or restart.
Lifecycle coverage and SSR guidance .changeset/resume-independent-subscription-demand.md, docs/contributing/glossary.md, packages/db/src/collection/index.ts, docs/contributing/oracle-coverage.md, docs/contributing/oracle-reviews/2026-10-22-dbclient-migration-feedback.md, docs/guides/ssr.md, .agents/skills/oracle-authoring/SKILL.md, .agents/skills/oracle-review/SKILL.md, packages/db/mangle-cache.json	Documentation records lifecycle and migration findings, SSR query reuse, index timing, preload lifetime, and client cleanup. The glossary and API documentation describe cleanup-time admission. Oracle skills add source-reading and model-alignment requirements.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Bug fix

Possibly related PRs

• TanStack/db#2060: Introduced deferred acquisition and resumeDeferredAcquisition() in the subscription path changed here.

Merge Risk: ⚪ Minimal · up to da37b

No confirmed merge-blocking issue remains. The deferred-resumption cleanup edge case is unresolved but has no established user impact.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 16.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 18 files. (4 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		The title clearly summarizes the main change: preserving subscriber demand and controlling cleanup admission.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description check		The description follows the required template and covers the changes, oracle coverage, verification results, remaining limitations, and release impact. It includes a changeset and detailed test eviden…

Full details: Description check

Explanation

The description follows the required template and covers the changes, oracle coverage, verification results, remaining limitations, and release impact. It includes a changeset and detailed test evidence. The local-test checklist remains unchecked even though scoped tests are reported as passing, and the author explicitly marks the PR as not ready because the SSR mismatch still needs a product decision.

Full details: Docstring Coverage

Explanation

Docstring coverage is 16.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 18 files. (4 skipped: 4 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

✨ Finishing Touches: 💡 1

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Size Change: +285 B (+0.13%)

Total Size: 221 kB

📦 View Changed

Filename	Size	Change
packages/db/dist/esm/client.js	4.22 kB	+2 B (+0.05%)
packages/db/dist/esm/collection/changes.js	3.06 kB	+104 B (+3.51%)
packages/db/dist/esm/collection/lifecycle.js	2.95 kB	+19 B (+0.65%)
packages/db/dist/esm/collection/subscription.js	8.9 kB	+10 B (+0.11%)
packages/db/dist/esm/live-query-observer.js	4.59 kB	+75 B (+1.66%)
packages/db/dist/esm/live-query-options.js	1.45 kB	+40 B (+2.84%)
packages/db/dist/esm/query/effect.js	5.36 kB	-8 B (-0.15%)
packages/db/dist/esm/query/pooled-live-query.js	4.17 kB	+43 B (+1.04%)

ℹ️ View Unchanged

Filename	Size
packages/db/dist/esm/collection-options-brand.js	219 B
packages/db/dist/esm/collection-options.js	258 B
packages/db/dist/esm/collection/change-events.js	1.76 kB
packages/db/dist/esm/collection/cleanup-queue.js	901 B
packages/db/dist/esm/collection/config-errors.js	547 B
packages/db/dist/esm/collection/events.js	481 B
packages/db/dist/esm/collection/index.js	5.27 kB
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packages/db/dist/esm/deferred.js	207 B
packages/db/dist/esm/error-message.js	642 B
packages/db/dist/esm/errors.js	6.54 kB
packages/db/dist/esm/event-emitter.js	1.06 kB
packages/db/dist/esm/index.js	4.55 kB
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packages/db/dist/esm/indexes/auto-index.js	924 B
packages/db/dist/esm/indexes/base-index.js	1.92 kB
packages/db/dist/esm/indexes/basic-index.js	1.93 kB
packages/db/dist/esm/indexes/btree-index.js	1.62 kB
packages/db/dist/esm/indexes/index-registry.js	916 B
packages/db/dist/esm/indexes/reverse-index.js	1.01 kB
packages/db/dist/esm/live-query-adapter.js	338 B
packages/db/dist/esm/live-query-window-controller.js	4.27 kB
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packages/db/dist/esm/optimistic-action.js	359 B
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packages/db/dist/esm/persisted-readiness.js	841 B
packages/db/dist/esm/proxy.js	3.51 kB
packages/db/dist/esm/query/builder/clone-query.js	849 B
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packages/db/dist/esm/query/builder/index.js	7.48 kB
packages/db/dist/esm/query/builder/query-ir.js	312 B
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packages/db/dist/esm/query/builder/ref-proxy.js	1.67 kB
packages/db/dist/esm/query/builder/wrapper-identity.js	221 B
packages/db/dist/esm/query/compiler/evaluators.js	2.51 kB
packages/db/dist/esm/query/compiler/expressions.js	603 B
packages/db/dist/esm/query/compiler/group-by.js	4.48 kB
packages/db/dist/esm/query/compiler/index.js	10.3 kB
packages/db/dist/esm/query/compiler/joins.js	3.42 kB
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packages/db/dist/esm/query/compiler/parent-routes.js	319 B
packages/db/dist/esm/query/compiler/query-equivalence.js	568 B
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packages/db/dist/esm/query/compiler/select.js	1.5 kB
packages/db/dist/esm/query/equality-conjunct.js	486 B
packages/db/dist/esm/query/equality-value-identity.js	735 B
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packages/db/dist/esm/query/live-query-collection.js	391 B
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packages/db/dist/esm/query/live/graph-scheduler.js	305 B
packages/db/dist/esm/query/live/internal.js	145 B
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packages/db/dist/esm/utils/uuid.js	530 B
packages/db/dist/esm/virtual-props.js	413 B
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packages/react-db/dist/esm/development.js	190 B
packages/react-db/dist/esm/HydrationBoundary.js	263 B
packages/react-db/dist/esm/index.js	330 B
packages/react-db/dist/esm/live-query-internals.js	282 B
packages/react-db/dist/esm/source-id-bindings.js	746 B
packages/react-db/dist/esm/useLiveInfiniteQuery.js	2.15 kB
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packages/react-db/dist/esm/useLiveQueryEffect.js	504 B
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packages/react-db/dist/esm/usePacedMutations.js	429 B

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commit: 90a3082

[coderabbitai]

Actionable comments posted: 1

🔇 Additional comments: 11

packages/db/tests/collection-subscription-lifecycle-grammar-oracle.ts: 1

43-86: LGTM!

packages/db/src/collection/changes.ts: 1

450-452: LGTM!

.changeset/resume-independent-subscription-demand.md: 1

1-5: LGTM!

packages/db/tests/collection-subscription-lifecycle-oracle.test.ts: 1

17-20: LGTM!

Also applies to: 2595-2597, 2625-2627, 2672-2674, 3422-3424, 3457-3557

packages/db/tests/collection-subscription.test.ts: 1

785-787: LGTM!

Also applies to: 1495-1497

packages/db/tests/db-client.test.ts: 1

379-379: LGTM!

Also applies to: 418-426

packages/react-db/tests/descriptor-query-binding-oracle.test.tsx: 1

81-91: LGTM!

Also applies to: 112-116, 269-421

docs/contributing/oracle-coverage.md: 1

487-512: LGTM!

docs/guides/ssr.md: 1

295-315: LGTM!

Also applies to: 316-335, 337-349

docs/contributing/oracle-reviews/2026-10-22-dbclient-migration-feedback.md-454-454: 1

454-454: 📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

⚠️ Unverified finding
Verification ran but could not confirm this finding. It is shown for review, not as a verified issue.

Rewrite the case-count phrase.

24 core and 24 React case counts is difficult to parse. Use the counts for 24 core cases and 24 React cases instead.

The supplied LanguageTool finding flags this compound wording.

Source: Linters/SAST tools

docs/contributing/oracle-reviews/2026-10-22-dbclient-migration-feedback.md-80-80: 1

80-80: 📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

⚠️ Unverified finding
Verification ran but could not confirm this finding. It is shown for review, not as a verified issue.

Clarify the ready eager rows phrase.

The phrase is ambiguous. The supplied LanguageTool finding also flags the compound wording. Name the source state instead, such as: Capturing only rows from eager sources that are ready fixes one trace but misses partial nonready rows and status flags.

Source: Linters/SAST tools

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• .changeset/resume-independent-subscription-demand.md
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🟡 Minor · Retry ordinary demand when cleanup completes. · changes.ts:447-465

packages/db/src/collection/changes.ts:447-465
🩺 Stability & Availability | 🟡 Minor | ⚡ Quick win

Retry ordinary demand when cleanup completes.

When subscribeChanges admits an ordinary subscriber while asynchronous cleanup is active, startSyncIfStopped() sees public status ready and does nothing. sync.resumeStart() also does nothing because cleanup cleared the deferred-start flags. Cleanup later publishes cleaned-up, but no completion path restarts this demand.

The subscription status listener only retries detached demand for loading and ready; it ignores cleaned-up. Queue a retry for ordinary demand at the CollectionChangesManager cleanup-completion boundary. Otherwise the subscriber remains active while the sync handlers are cleared, so it receives no provider updates until another operation starts a new sync.

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Review comment at @packages/db/src/collection/changes.ts around lines 447 - 465:
Update the CollectionChangesManager cleanup-completion path to queue a
sync-start retry for ordinary subscriber demand when cleanup publishes
cleaned-up. Preserve the existing handling for deferring subscribers and ensure
the retry runs after cleanup completes.

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Review comments at @packages/db/src/collection/changes.ts:
- Around line 447-465: Update the CollectionChangesManager cleanup-completion
path to queue a sync-start retry for ordinary subscriber demand when cleanup
publishes cleaned-up. Preserve the existing handling for deferring subscribers
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