deltoids
v0.16.0 / open source

Diffs for the
agentic era.

Review code in your terminal. Hunks grow to their enclosing function, Jev points you at the changes that matter, and language servers take you to definitions and callers.

Install Try it live → View on GitHub →
brew install juanibiapina/taps/deltoids
default
Default git diff: 3 lines of context, scope is invisible
deltoids
deltoids: hunk expanded to the enclosing function

Review in your terminal

Run deltoids in a repo to open the TUI. It shows your working tree, branches, and commits as scope-expanded, syntax-highlighted diffs that refresh as files change.

The deltoids TUI: the Files and Local branches panels on the left, a scope-expanded Rust diff with review tags on the right
1 2 0

Panels like lazygit

Files and branches on the left, the diff on the right. Stage, unstage, and discard without leaving the review.

 z / x

Context on demand

Hunks show their enclosing function. Grow one to its class or the whole file, and shrink it back.

 Enter

Commits and branches

Open any commit, or a whole branch, as one diff with the same review tools as the working tree.

 but

GitButler workspaces

See stacks, branches, and commits like but status. Discards go through but, so but undo brings them back.

 f / F

Review guidance

TypeSafe's Jev tags each change and marks the ones that need care. Hide tests, comments, and imports.

 Enter / r

Code navigation

Go to a definition or list a function's callers from the diff, through rust-analyzer, gopls, and other language servers.

 c / y

Comments for agents

Comment on diff lines, then copy every note with its file, line, and code to hand to a coding agent.

 t

Syntax themes

Pick from Tokyo Night and every bat theme, live, or set a default in config.toml.

No install needed to review a GitHub PR: the same scope-expanded, syntax-highlighted diffs run entirely in your browser. Try it live →

Use as a diff pager

Pipe a single diff, or set deltoids as the default in your tools.

git
  • one-time
    git diff | deltoids | less -R
  • default pager
    git config --global core.pager 'deltoids | less -R'
gh
  • one-time
    gh pr diff <number> | deltoids | less -R
  • default pager
    gh config set pager 'deltoids | less -R'
lazygit
  • # ~/.config/lazygit/config.yml
git:
  paging:
    pager: deltoids
lazygit running with deltoids as the pager: hunks expanded to the enclosing function

Install

Prebuilt binaries for macOS and Linux. Or build from source with cargo.

homebrew
brew install juanibiapina/taps/deltoids
shell installer
curl -sSL https://github.com/juanibiapina/deltoids/releases/latest/download/deltoids-cli-installer.sh | sh
cargo (from source)
cargo install --git https://github.com/juanibiapina/deltoids deltoids-cli

See GitHub Releases for all downloads.

FAQ

Is deltoids just a pager?
No. Piped a diff, it's a pager. Run in a terminal, deltoids opens a TUI to review your working tree, your branches, and their commits, in git or in a GitButler workspace.
Does deltoids send my code anywhere?
Only when you set TYPESAFE_API_KEY. Then the TUI sends the changed hunks to TypeSafe's Jev for review guidance. Lockfiles and generated files stay local. Language servers run on your machine.
Which languages support go to definition?
Rust, Go, TypeScript, JavaScript, Python, C, C++, Ruby, Lua, Bash, Java, and Kotlin work with their usual language server on PATH. The other languages deltoids parses, such as CSS, JSON, and YAML, can get a server in config.toml. See Language servers.
How is this different from git diff -W?
git diff -W finds scope with regex. deltoids parses the file with tree-sitter.
Which languages get syntax highlighting?
Any syntax bundled with syntect (e.g. Dockerfile), independent of tree-sitter scope support. Scope expansion covers the tree-sitter languages.