Static analysis shows how code is connected today. Git history offers a different signal: which files repeatedly changed together over time.
That's the idea behind histui, a local-first tool that answers one focused question:
Which files have historically changed with this file?
Useful for planning a refactor, tracking down a cross-module bug, or getting oriented in an unfamiliar codebase. Co-change isn't proof of a dependency but it's a solid clue about what else to look at.
There's also a Pi extension and Agent Skill, so agents can query this evidence directly compact, structured, cancellable, and never triggering a hidden indexing run.
Full docs, setup, and Pi integration details: histui.vercel.app/docs
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