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I built Ponytrail, a local audit trail for AI coding-agent edits

Hacker News · Jun 22, 2026, 2:54 PM

Key takeaways

  • Ponytrail is a small CLI and bundled agent skill for recording why files changed, showing those changes as a local history tree, and reverting files from a previous snapshot.
  • It keeps the trail in .pony-trail/ inside your project.
  • Install the bundled pony-trail skill into your local agent tools:

Ponytrail is a small CLI and bundled agent skill for recording why files changed, showing those changes as a local history tree, and reverting files from a previous snapshot.

It keeps the trail in .pony-trail/ inside your project. Treat that folder as local runtime state; it should stay out of git.

Install the bundled pony-trail skill into your local agent tools:

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