Run the issue-labeler over pull requests using polling#52898
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Run the issue-labeler over pull requests using polling#52898
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Co-authored-by: jeffhandley <1031940+jeffhandley@users.noreply.github.com>
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[WIP] Replicate changes from dotnet/runtime#124023
Run the issue-labeler over pull requests using polling
Feb 7, 2026
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Feb 7, 2026
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@copilot Do not add the DEFAULT_LABEL configuration. This repo does not use a default label.
Co-authored-by: jeffhandley <1031940+jeffhandley@users.noreply.github.com>
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Pull request overview
Adds a scheduled “polling” mode to the issue-labeler PR prediction workflow so that unlabeled PRs (including Copilot-authored PRs where automatic runs may be blocked) can still be labeled proactively, and so missed event-triggered runs can be recovered.
Changes:
- Add a 5-minute cron schedule trigger to periodically scan for open PRs missing
Area-labels. - Introduce a
poll-pull-requestsjob that collects candidate PR numbers and feeds them into the prediction job. - Update
workflow_dispatchso an empty PR list triggers polling behavior, and gate prediction steps when there’s nothing to process.
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Copilot-authored pull requests run workflows with permissions lower than other PRs (including those submitted by external contributors). This blocks the issue-labeler workflow from being able to run on those PRs, leaving a prompt for the workflow to be approved.
To run issue-labeler over these PRs as well as other PRs that have missed labeling (such as GitHub service interruptions when the events don't trigger), the PR label prediction workflow adds a cron schedule for as frequently as GitHub will run it (by using every 5 minutes). When triggered from the polling event, we collect the list of open and unlabeled PRs that have been updated since the last polling run (plus 5 extra minutes), and we run the issue-labeler prediction against those.
This also updates the workflow_dispatch event to allow an empty list of PR numbers to force a polling event run.
Addresses (dotnet/issue-labeler#105) Pull Request Labeling does not run automatically for Copilot PRs for this repository.
Replicates dotnet/.github#20 and dotnet/runtime#124023.
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