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Tester
Proves the change works.
Writes the test first when there isn’t one, runs the suite and reports exactly what broke.
244
agents in a typical run
2 min 5 s
per task, on average
99.4%
pass on the first try
Works with
Jest, Vitest, Pytest, Go test, Playwright
From a real run
ran 2,318 tests · 2 new · 0 failing
What it does
Tester checks every change against the test its task names. When a task has no test, Tester writes one before the change is made.
Where it fits
Between Coder and Reviewer on every change.
Runs the full suite once per wave.
Flags slow and flaky tests for Analyst.
Limits
Tester runs in a sandbox copy of your environment, never against production data.
Next agent
Reviewer
Pulls the best work together.
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