regression-strategy
Design a fast, trustworthy regression strategy — turn every fixed bug into a permanent test, tier suites (smoke/full/nightly), select only impacted tests via test-impact analysis, and detect/quarantine flaky tests so red always means broken. Use when CI is slow, flaky, or regressions keep shipping.
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Overview
A bug you fixed without a test is a bug you'll ship again. A suite that's slow or flaky is a suite the team learns to ignore — and an ignored suite catches nothing. This skill is the deep reference for building a regression strategy that stays fast, trustworthy, and cheap to run on every change: what to test, how to pick the minimal set, how to keep it green-means-good, and the trade-offs that bit
What it covers
- Bug-to-test discipline (the core loop)
- Test-impact analysis (run only what changed)
- Tiering: smoke / full / nightly
- Flaky tests: detect, quarantine, fix
- Prioritization & parallelization
- Flaky Tests — Detection, Quarantine, Root Cause
- Test-Impact Analysis (TIA)