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How to check what an edit breaks before calling it done with Ripwire

Run the edit check to see blast radius, tests that reach the change and incompatible call sites.

Who it is forA developer or agent that has just changed a function or public symbol and wants to confirm nothing else silently diverged.

The problemA text search can miss call sites, so a signature change can leave some callers out of date without any test failing.

The outcomeA list of the blast radius, the tests that reach the edit and any call sites flagged as incompatible, to fix before merging.

What you need first

  • A terminal with bash and curl to run the one-line installer
  • A local clone or checkout of the repository you want to explore
  • A coding agent that can run shell commands, such as Claude Code, Codex, Cursor, Windsurf, Gemini, opencode or aider

Steps

  1. Install Ripwire and add it to your path, as shown in the first use case.
  2. Change into the repository: cd your-repo
  3. Run the edit check flag, named --edit-check, on the file or symbol you changed. Look up its exact arguments in the reference guide before running it.
  4. Review the blast radius, the tests that reach the change and any flagged call sites.
  5. Verify each flagged call site by compiling, then fix the ones that are truly broken.

Prompt for your agent

Use ripwire on the repo at <path>. After editing <symbol>, run the --edit-check flag on it and report the blast radius, the tests that reach it and any incompatible call sites. Verify each flagged site by compiling before you change anything.

Caveat. The README warns that the contract checker's arity heuristic over-counts on defaulted trailing parameters, so each flagged site should be confirmed by compiling.

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