feat: migrate PR automation to Buildkite#26
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Replaces GitHub Actions scheduled workflows (unreliable under load, no SLA) with Buildkite pipelines + standalone shell scripts. Three scripts using GH_PAT instead of GitHub App token: - pr-review-digest.sh — channel digest of unreviewed PRs (unchanged logic) - draft-pr-reminders.sh — @mention authors about their draft PRs per timezone - ready-pr-reminders.sh — @mention authors about their ready PRs with no reviewer Buildkite schedules to configure (see .buildkite/ README in PR): pr-review-digest: twice per weekday at 8:30am and 2:30pm AEST pr-reminders: Monday 9am per timezone group (3 schedules × TIMEZONE_GROUP env var) Closes #24 (draft-pr-reminders GHA branch superseded by this). Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
JP-Ellis
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Jun 3, 2026
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Summary
GH_PATinstead of GitHub App JWT (create-github-app-token)Files
.buildkite/pr-review-digest.yml.buildkite/pr-reminders.yml.buildkite/scripts/pr-review-digest.sh.buildkite/scripts/draft-pr-reminders.shGH_PAT.buildkite/scripts/ready-pr-reminders.sh.buildkite/draft-pr-slack-mapping.json.github/workflows/pr-review-digest.ymlBuildkite setup required after merge
Pipeline 1: PR Review Digest
.buildkite/pr-review-digest.ymlGH_PAT,SLACK_WEBHOOK_URL30 22 * * 0-4— 8:30am AEST Mon–Fri30 4 * * 1-5— 2:30pm AEST Mon–FriPipeline 2: PR Reminders (draft + ready, per timezone)
.buildkite/pr-reminders.ymlGH_PAT,SLACK_WEBHOOK_URL0 23 * * 0+TIMEZONE_GROUP=Australia/Melbourne— Mon 9am AEST30 3 * * 1+TIMEZONE_GROUP=Asia/Kolkata— Mon 9am IST0 9 * * 1+TIMEZONE_GROUP=Europe/London— Mon 9am GMTSecrets needed:
GH_PAT(PAT withread:org+reposcopes),SLACK_WEBHOOK_URLCloses #24
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