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Show HN: OmniDiff – Opensource, super fast, content aware Git difftool, in Rust

What HN thinks

A diff tool launch that quickly became a diff of license philosophies.

Impressive moved-code aware diffing
Many commenters praised the tree-based algorithm for producing more minimal diffs, especially for moved code, with the author citing accuracy and speed gains over Difftastic.
AGPL choice debated
Some argued AGPL will doom adoption versus MIT-licensed rivals, while others, including the author, defended copyleft as a deliberate political choice; a side debate questioned copyright on AI-assisted code.
Delta is good enough
Some users found Delta's packaging, intra-line highlighting and pipe-friendly use more practical, and a few were unconvinced by OmniDiff's output or hit setup issues.

Consensus: Most agree the content-aware, move-detecting approach is a genuine improvement over line-based diffs, though packaging and licensing give some people pause.

Recommended in the comments

delta ↗ (tool): Widely packaged, works by piping git diff, and highlights changed characters within lines.
Difftastic (tool): MIT-licensed syntax-aware differ with side-by-side display on wide terminals.
diffsitter (tool): Cited as an existing MIT-licensed language-aware differ.

Summarised by Claude from the comment thread 14 hours ago.

Points: 292
Comments: 91
Best rank: #8
Posted: 2026-11-01 by FabCH
Category: Programming

git difftool rust structural-diff ast-diff code-review agpl

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