Perch
Launched
Check coding-agent edits against plain-English code requirements
About Perch
Perch is an MIT-licensed semantic code linting CLI. Developers save project, file, and method requirements in plain English, then run those rules during coding-agent edits or in CI. Check an edit, fix a reported finding, and check again. Relevant source goes to the configured model service; unchanged code reuses cached answers. Hosted checks use usage pricing with no seat fees.
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Perch in brief
Is Perch open source?
Yes. As of November 14, 2026, GitHub reports the MIT licence, an open source licence, for the code at github.com/lakeday-org/perch.
