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Built env-genie after too many “it was the .env” incidents. It's a tiny linter for .env files. It catches invalid keys, trailing spaces, CRLF line endings, and other common foot-guns that break configs—then optionally emits SARIF so you get first-class GitHub Code Scanning alerts. Drop it into CI to fail fast, or run it locally before committing. Built for Windows/macOS/Linux, with path normalization that makes SARIF uploads “just work.” Free & open source.