mindwalk

Mindwalk replays what your coding agent actually did. It renders your repo as a 3D map and plays back the session as light moving through it: which files the agent searched, read, and edited, in order. The diff tells you what changed; this shows you how the agent got there. MIT licensed and free.

Install is a one-line script and it runs entirely on your machine. No server, no account. The only outbound call is optional: it can send a session summary to your own Claude Code or Codex account for evaluation.

Worth a look if you run coding agents daily and keep wondering why the agent read half the codebase to change one file. It comes from the maintainer of air, the Go live-reload tool, which counts for something on follow-through. Free at any team size.

The catch is that it's young and narrow. Version 0.2, small codebase, one use case. Tracing platforms like Langfuse cover LLM apps broadly; nothing else does this specific replay trick, but 'nothing else does it' cuts both ways.