[waleedlatif1]

Summary

• Follow-up to fix(gmail): drop an expired history cursor instead of re-saving it every poll #9343. A search-mode Gmail poll (no stored cursor) sent historyId: undefined, which updateWebhookProviderConfig treats as a key removal. If it overlapped a newer poll that had just stored a cursor, it deleted that cursor.
• The poll state is now built once and carries historyId only when this poll started with a cursor or found one, so only a poll whose cursor Gmail rejected can clear it. Search-mode polls leave the key alone, as before fix(gmail): drop an expired history cursor instead of re-saving it every poll #9343.
• Left as is: a poll holding an expired cursor can still clear a cursor an overlapping poll stored, the same stale-snapshot last-writer-wins race every polling provider already has. It needs an overlap (the provider lock outliving its TTL, or no Redis) plus an expired cursor, and costs at most an extra search-mode poll — the webhookId:messageId idempotency key dedupes, and the search window covers the gap. A compare-and-set would change updateWebhookProviderConfig for every provider.

Type of Change

• Bug fix

Testing

• lib/webhooks/polling/gmail.test.ts: new case "leaves the stored cursor untouched when a search-mode poll finds no mail" fails on staging (sends a historyId key) and passes with the fix
• lib/webhooks/polling/ suite: 57 passed
• biome, check:test-patterns, check:comment-hygiene

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated
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[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

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[greptile-apps]

Confidence Score: 5/5

[Medium impact] This PR appears safe to merge.

Summary

Gmail polls now share one pollState update. They include historyId only when the poll started with a cursor or found one.

• Search-mode Gmail polls leave a saved history cursor alone.

No actionable issues found. Tests were inspected, not run.

_{Reviews (1) · Last reviewed commit: "fix(gmail): clear the history cursor onl..." · Reviewed by Greptile}