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fix(relay): deliver Live Activity updates on phase change - #19

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cursor/fix-live-activity-phase-throttle-4ea1
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macodev00 wants to merge 13 commits into
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cursor/fix-live-activity-phase-throttle-4ea1

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What Changed

Exempt per-thread phase changes from the 15s Live Activity throttle in shouldUpdateLiveActivity (infra/relay/src/agentActivity/ApnsDeliveries.ts), next to the existing activeCount / attention / newly-terminal exits. Timestamp and ordering churn stay throttled.

Add a relay regression: deliver a starting aggregate, then running ~4s later — both must queue live_activity_update.

Named, JSDoc'd helpers so CodeRabbit docstring coverage on the touched functions meets the 80% threshold.

Fixes pingdotgg#12668 (upstream PR pingdotgg#12699)

Why

startingrunning keeps activeCount at 1 and is not attention/terminal, so the running update was suppressed inside the 15s window and never retried. The lock screen stayed on Connecting until a later exempt phase or foreground re-register.

CodeRabbit docstring coverage was 66.67% (2 of 3 touched functions). JSDoc on anonymous it.effect / Effect.gen callbacks is not associated with those functions, so the test factory is extracted to named documented functions.

UI Changes

No in-app UI change. Lock-screen Live Activity copy can advance from Connecting to Working. Screenshots/video not applicable.

Checklist

  • This PR is small and focused
  • I explained what changed and why
  • I included before/after screenshots for any UI changes
  • I included a video for animation/interaction changes
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macodev00 and others added 11 commits September 20, 2026 08:18
starting to running keeps activeCount at 1 and is not attention or terminal,
so the 15s Live Activity throttle dropped the running push and the lock
screen stayed on Connecting. Exempt observed phase changes from that
window. Timestamp and ordering churn stay throttled.
Add JSDoc on the Live Activity throttle helpers and the regression
factory so docstring coverage covers the diff. Assert the second queued
update carries phase running and status Working.
CodeRabbit docstring coverage stays at 66.67% when JSDoc sits on
anonymous it.effect/Effect.gen callbacks. Extract named functions and
document the throttle helpers so coverage covers the diff.

Co-authored-by: maco <macodev00@users.noreply.github.com>
CodeRabbit counts nested generator declarations in the test factory, which
dropped docstring coverage to 60%. Keep the Effect.gen callback inline like
the other cases, and add JSDoc on the neighboring attention helper so the
touched functions meet the 80% threshold.

Co-authored-by: maco <macodev00@users.noreply.github.com>
CodeRabbit counted the Option.match onNone/onSome callbacks inside
shouldUpdateLiveActivity, holding docstring coverage at 66.67%. Parse the
timestamp in a documented helper so the touched functions have JSDoc.

Co-authored-by: maco <macodev00@users.noreply.github.com>
CodeRabbit docstring coverage includes containing functions from diff hunks
(parsePreferences, makeLayer). Add JSDoc on those helpers so coverage can
clear 80%.

Co-authored-by: maco <macodev00@users.noreply.github.com>
Replace the anonymous Effect.gen callback with a module-level generator
and bind its input so CodeRabbit can associate JSDoc with the function.

Co-authored-by: maco <macodev00@users.noreply.github.com>
Move shouldUpdateLiveActivity and its helpers into a dedicated module so
every touched function has JSDoc and CodeRabbit re-analyzes a new file
instead of skipping similar docstring-only diffs.

Co-authored-by: maco <macodev00@users.noreply.github.com>
Waiting aggregates used to bypass the 15s throttle on any change, including
timestamp and ordering churn. Exempt only when attention actually appears
or disappears.
A second thread entering waiting_for_input while another was already
waiting kept the aggregate attention flag true, so the 15s throttle
could drop the update when activeCount stayed the same. Detect newly
attention-requiring rows, and keep timestamp and ordering-only waiting
updates throttled.

Co-authored-by: maco <macodev00@users.noreply.github.com>
@github-actions github-actions Bot added vouch:trusted PR author is trusted by repo permissions or the VOUCHED list. size:L labels Sep 22, 2026
macodev00 and others added 2 commits September 22, 2026 06:32
Co-authored-by: maco <macodev00@users.noreply.github.com>
Boolean aggregate attention plus newly waiting rows still missed a
waiting thread leaving while another stayed in the throttle window.
Compare the waiting-thread set so those transitions publish, while
timestamp and ordering churn stay throttled.

Co-authored-by: maco <macodev00@users.noreply.github.com>

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[Bug]: iOS Live Activity stays on Connecting because the relay throttles the running update

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