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interactive, side-by-side file review for git diffs with per-file navigation, vertical and horizontal scrolling, syntax highlighting, and added/deleted line tinting

580 starsRust

Deff – side-by-side Git diff review in your terminal

Name: Deff – side-by-side Git diff review in your terminal
Availability: InStock
Author: flamestro

by flamestro·Feb 26, 2026·120 points·67 comments

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AI Analysis

●●SolidNiche GemShip ItDark Horse

Vim-native side-by-side diffs with in-diff search, but competes with `git diff --color-words` and fancier GUIs.

Strengths

•Per-file reviewed toggle persisted in .git avoids re-reviewing same files
•Independent horizontal scrolling per pane and search in both sides simultaneously
•Lightweight Rust binary with no external daemon dependency

Weaknesses

•Solves a narrow niche (terminal code review) when web/IDE reviewers dominate professional workflows
•Feature-complete for git but no GitHub/GitLab integration or pull request awareness

Post Description

deff is an interactive Rust TUI for reviewing git diffs side-by-side with syntax highlighting and added/deleted line tinting. It supports keyboard/mouse navigation, vim-style motions, in-diff search (/, n, N), per-file reviewed toggles, and both upstream-based and explicit --base/--head comparisons. It can also include uncommitted + untracked files (--include-uncommitted) so you can review your working tree before committing.

Would love to get some feedback