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fix(package-sources): follower trails the changes feed head to avoid skipping late entries - #1931

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9pace wants to merge 2 commits into
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follower-trailing-margin
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9pace wants to merge 2 commits into
mainfrom
follower-trailing-margin

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@9pace

@9pace 9pace commented Sep 21, 2026 •

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The canary SLA alarm has been firing bc the follower reads the npm changes feed right at its head, and the feed does not return consistent results there.

Fix: read only up to (feed head - margin) so entries have time to settle before the cursor reaches them.

Draft while i finalize the margin from live measurements.


By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

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Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
@9pace 9pace closed this Sep 21, 2026
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