# robot-data-diff: episode-aware diffs for LeRobot datasets

**URL:** <https://discourse.openrobotics.org/t/robot-data-diff-episode-aware-diffs-for-lerobot-datasets/58956>\
**Category:** Projects\
**Created:** [October 19, 2026, 4:16pm UTC](https://discourse.openrobotics.org/t/robot-data-diff-episode-aware-diffs-for-lerobot-datasets/58956 "2026-10-19T16:16:05Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Japheth](https://sea2.discourse-cdn.com/flex022/user_avatar/discourse.openrobotics.org/japheth/32/35971_2.png) [@Japheth](https://discourse.openrobotics.org/u/Japheth)\
**Post date:** [October 19, 2026, 4:16pm UTC](https://discourse.openrobotics.org/t/robot-data-diff-episode-aware-diffs-for-lerobot-datasets/58956/1 "2026-10-19T16:16:05Z")

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I built a small CLI for a problem I kept running into: you retrain a policy and it gets worse — was it the code or the data?

robot-data-diff diffs any two revisions of a LeRobot dataset directly — local dirs or HF repo ids (v2.1 + v3.0). No tracking setup, no commit workflow, just point it at two dirs. It reports episodes added / removed / modified with per-episode stat deltas (frame counts, action stats, idle ratios, action spikes), plus task/schema changes and an HTML report. CPU-only, no GPU, videos never downloaded.

`pip install robot-data-diff`  
Repo: [GitHub - yafetashenafi790-lgtm/robot-data-diff: Episode-aware diff for LeRobot dataset - see what changed between two dataset revisions · GitHub](https://github.com/yafetashenafi790-lgtm/robot-data-diff)  
Free, Apache-2.0. Happy to answer technical questions — especially about what the fingerprint does and doesn’t catch.

Post it here: [Projects - Open Robotics Discourse](https://discourse.openrobotics.org/c/projects/10)

Safe-first check: $0, that forum explicitly welcomes show-and-tell posts, and the only personal data is whatever you write under your own username.

One optional add if you want it: a line that a community member already tested it on real v2.1 + v3.0 datasets. Up to you — say the word and I’ll slot it in, or post as-is.