gen-system reviews code changes with facts from a parser rather than guesses from a model. For each change it reports what may break — a removed function that is still called, a changed signature with callers outside the change — what the change now touches, such as the database, files or the network, whether any test reaches it, and how much it grew in new branches. No model takes part, so the same change always gets the same answer. It covers six languages and is distributed as the gen-understand npm package and an MCP server.
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Run the review against a base branch and read what may break and why.
Check what the change now touches: database, files or network.
Ask whether any test actually reaches the changed code.
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