siftwise is an open-source, self-hosted tool that runs only the tests your change can affect , and tells you whether a failing test is your fault, already broken on main, or just flaky .

New here? Post 1 explains the idea and sets up the server and the GitHub Action. Post 2 adds GitLab CI and five coding agents over MCP.

Today v0.3.0 is out. The theme: smarter selection .

pip install --upgrade siftwise # 0.3.0

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What's new in v0.3

🎯 Risk order: the tests most likely to fail run first, so a failure shows up early.

⏱️ Time budget: "the riskiest tests that fit in 5 minutes", for fast feedback.

🟨 Jest selection: a JS/TS import graph, with no Node.js needed.

☕ Java selection for Maven and Gradle, including multi-module builds.

🐶 Dogfooding: siftwise now runs on its own CI on every PR and push, with live numbers.

🐛 Follow-ups and fixes from testing v0.2 on real repos, three of which made siftwise silently miss tests.

🙌 First outside contributors: two of…