Back off VCS remote refresh failures

[juliusmarminge]

Summary

• Added exponential backoff for repeated VCS remote refresh failures, with a 30s base delay and a 15m cap.
• Preserved the configured refresh interval as the minimum delay when it is larger than the computed backoff.
• Reset the failure counter after a successful refresh and log the next retry delay on failures.
• Added unit coverage for the backoff calculation.

Testing

• Not run locally.
• Added VcsStatusBroadcaster.remoteRefreshFailureDelay assertions covering exponential growth, configured-interval floor, and max-delay capping.

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Note

Medium Risk
Changes the remote status polling loop timing and retry behavior, which could affect refresh frequency and load if the schedule math is wrong. Logic is contained and covered by a new unit test for delay calculation.

Overview
VCS remote status auto-refresh now backs off exponentially on consecutive failures (30s base, capped at 15m), while still honoring any larger configured refresh interval as a minimum delay.

The remote poller loop was reworked to track consecutive failures, reset the counter on success, and log retry metadata (failure count and next delay); a focused unit test was added for remoteRefreshFailureDelay.

^{Reviewed by Cursor Bugbot for commit 8b65c8c. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Back off VCS remote refresh failures exponentially in makeRemoteRefreshLoop

• Adds remoteRefreshFailureDelay to compute per-attempt delay: exponential backoff starting at 30s, capped at 15 minutes, and never faster than the configured interval.
• Refactors makeRemoteRefreshLoop in VcsStatusBroadcaster.ts to track consecutive failures and apply the computed backoff delay instead of a fixed polling interval.
• On failure, logs a warning with cwd, cause, consecutiveFailures, and nextDelayMs; resets the counter on success.
• Behavioral Change: a zero configured interval no longer stops looping — it still polls at the 30s base delay.

^{Macroscope summarized 8b65c8c.}

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[macroscopeapp]

Approvability

Verdict: Approved

Self-contained bug fix adding exponential backoff for VCS remote refresh failures. The change is well-tested, limited in scope to a single broadcaster component, and authored by the primary contributor to this file.

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