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fix(sidecar): resume Gmail history past page cap when pages are deduped - #678

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@cursor

@cursor cursor Bot commented Aug 8, 2026

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Summary

  • Persist history_page_token in sidecar_state (migration 32) when Gmail history listing is truncated by the page cap
  • Resume listNewMessageIds from the saved page token on the next poll instead of re-fetching already-deduped pages
  • Clear the resume token when the listing completes or on history-gap re-anchor

Why

When Gmail history spans more than MAX_HISTORY_PAGES (3) and pages 1–3 are fully deduped, truncated=true froze the cursor forever and page 4+ messages were never ingested — silent data loss during mail bursts on sidecar mailboxes.

Test plan

  • npm test passes locally (59 sidecar/gmail-client/sidecar-state tests)
  • New regression test: truncated history with all pages deduped saves history_page_token and resumes on poll 2
  • npm run typecheck passes locally

Notes for reviewer

This is a re-land of #667, which was identified by prior critical-bug scans but never merged to main.

Open in Web View Automation 

…ed (#667)

When Gmail history spans more than MAX_HISTORY_PAGES (3) and pages 1–3 are
fully deduped, truncated=true froze the cursor forever and page 4+ messages
were never ingested — silent data loss during mail bursts.

Persist history_page_token in sidecar_state (migration 32) and pass it to
listNewMessageIds so the next poll resumes from the dangling pageToken
instead of re-fetching already-deduped pages.

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

schmug commented Aug 23, 2026

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Closing as superseded by #686.

This is one of 24 near-identical PRs re-filed daily by an automation that has since been fixed. #686 carries the same Gmail history page-token change and is the one kept open, so no work is lost here.

@schmug schmug closed this Aug 23, 2026
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2 participants