PyTrace Autopsy: Teaching AI to Debug Like a Human

How runtime function tracing turns Claude Code from a code reader into a runtime detective You know the loop. You are building a feature with Claude Code. It writes the code, writes the tests, runs them, and the tests fail. Claude reads the traceback, stares at the source, and proposes a fix. You run the tests again. Still failing. Claude tries a different fix. After three attempts, you are wondering: why does it keep missing this? Here is the thing. Claude can read your code perfectly well. It can follow the logic, understand the types, and reason about control flow.