Explains any cron expression in plain English, lists the next run times, and flags pitfalls such as the day-of-month OR day-of-week rule, dates that never occur, DST gaps, UTC versus local time, and overlapping jobs. Includes a tested stdlib Python checker for crontab files.
Plans and audits backup retention (grandfather-father-son) policies. Simulates hourly, daily, weekly, monthly and yearly keep rules like restic or borg, lists the restore points you really keep and the gaps between them, and estimates storage and cost now and in 12 months. Flags missed RPO, short history, legal retention gaps, no offsite or immutable copy, stale restore tests and job overlap. Includes a stdlib Python planner with --self-test.
Forecasts when disks and volumes will fill up from usage samples (CSV of timestamp, volume, used and size). Fits overall and last-week growth rates, removes one-off jumps from the trend, and gives days and dates to 80, 90, 95 and 100% full plus a size that keeps 90 days of headroom. Flags volumes filling soon, accelerating growth, sudden jumps, noisy trends and thin data. Includes a stdlib Python forecaster with --self-test.
Turns request counts into SLO answers: SLI, error budget for a 28d or 30d window, budget consumed and remaining, burn rates over 5m to 3d, multiwindow burn-rate alerts (page at 14.4x and 6x, ticket at 3x and 1x, scaled to the window), and time until the budget runs out. Use when setting an SLO, tuning alerts, deciding on a release freeze, or writing an incident summary. Includes a stdlib Python calculator with --self-test.
Finds flaky tests from repeated CI runs: parses JUnit XML or a CSV run history, flags tests that both pass and fail (confirmed when on the same commit), ranks them by flip and failure rate, and suggests likely causes and fixes. Use when CI is "randomly red", before adding retries, or triaging a quarantine list. Includes a stdlib Python detector with --self-test.
