Recipes

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Review a risky change

mix reach.check --changed --base main
mix reach.inspect MyApp.Target.function/2 --impact
mix reach.inspect MyApp.Target.function/2 --context

Use JSON in CI:

mix reach.check --changed --base main --format json

Find refactoring candidates

mix reach.check --candidates
mix reach.inspect MyApp.Target.function/2 --candidates

Candidates are advisory. Use the evidence fields to prove behavior preservation before editing.

Trace tainted input

mix reach.trace --from conn.params --to Repo
mix reach.trace --from conn.params --to System.cmd --all

Inspect OTP coupling

mix reach.otp
mix reach.otp --concurrency
mix reach.inspect MyApp.Worker.handle_call/3 --context