Show HN: Mindwalk – Replay coding-agent sessions on a 3D map of your codebase

Mindwalk is a visualization tool that replays coding-agent sessions as light moving through a 3D map of your codebase, showing where an AI agent searched, read, and edited files to make its reasoning process visible at a glance. The open-source tool works locally with Claude Code and Codex session logs, representing the repository as a "night map" where touched files glow in different colors based on interaction depth (seen, read, edited, or unvisited). Users can install it as a single Go binary and view sessions through an interactive web interface with features like tree/treemap views, playback controls, and friction signal indicators.