[kr1shna-exe]

Summary

Page-load handlers keep running after their client disconnects, retaining state locks and repeatedly trying to send updates to a closed socket. Cancel that work when the current socket disconnects.

Closes #7251.

What changed

• Cancel unfinished page-load chains, including self-chained descendants and queued hydration.
• Check socket ownership so a stale disconnect cannot cancel a replacement connection's load. Preserve independent foreground and background events.
• Add lifecycle regressions, page-load documentation and package news fragments. Raise the reflex-base dependency floor for the new processor hook.

Verification

• 11,196 unit tests passed; 155 skipped; 78.99% coverage.
• Ruff lint and format checks, pyright reflex tests and changed-file pre-commit hooks passed.
• A real Socket.IO disconnect stopped a polling handler; independent background work completed and the same token reconnected successfully.
• The reflex-base minimum-dependency check passed. Root dependency resolution fails on an existing hosting CLI/build SDK conflict. Full-repository pre-commit also hits six macOS benchmark typing errors. Both failures reproduce on clean upstream/main.

Deployment notes

No configuration changes. Page-load handlers and their chained events now receive cancellation on disconnect, matching navigation and reconnect behavior. Existing Redis cancellation-persistence behavior is unchanged and tracked separately in #7248.

[cubic-dev-ai]

No issues found across 10 files

_{Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no new actionable issue was found.

Summary

Cancels unfinished hydration and page-load chains when their current client disconnects.

• A client disconnect stops its unfinished page-load work.

_{Reviews (6) · Last reviewed commit: "Merge branch 'main' into fix/7251-cancel..." · Reviewed by Greptile}

[codspeed]

Merging this PR will not alter performance

1 warning

⚠️ 11 benchmarks are dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

See affected benchmarks

✅ 148 untouched benchmarks

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_{Comparing kr1shna-exe:fix/7251-cancel-disconnected-page-loads (519f568) with main (7f89e48)}