Lemma epsilon

Lemma is a LaTeX editor for Linux and macOS (GTK 4 / libadwaita) built around reviewing an AI
agent's edits: every change the agent makes shows up inline as a red/green hunk that you accept
or reject on its own, like a code review. It is also a complete LaTeX editor without the agent.

epsilon is Lemma's first release (version 0.1.0), and the first with macOS support.

Highlights

• Agent edits as reviewable hunks. Claude Code, Codex, Grok Build, Gemini CLI, OpenCode,
  GitHub Copilot, Pi, any other ACP agent, or the Anthropic API with your own key. Accept or
  reject per hunk (Alt+Y / Alt+N), per file or per turn; Ctrl+K edits just the selection.
• Attach images and files to a prompt: the paperclip, drag and drop, or paste.
• Build and preview: latexmk on save, a PDF pane that reloads in place, dark mode, search,
  thumbnails, bookmarks and SyncTeX both ways.
• Diagnostics in plain English, with quick fixes for common errors and optional chktex lint.
• Writing help: completion for commands, environments, labels, citations and Unicode math,
  snippets and autosnippets, spell checking, hover previews of \ref, \cite and rendered math,
  label rename and references.
• Navigation: project outline, command palette, quick open, project search and replace, go
  to definition, session restore, local history and a git gutter. Optional Vim mode.
• New: macOS on Apple silicon, with a self-contained app, the API key in the Keychain,
  Finder's Open With, and a one-command installer that sets up TeX as well.

Downloads

System	File	Install
macOS 15+ (Apple silicon)	Lemma-epsilon-macos-arm64.dmg	Open it and drag Lemma to Applications (first start: see below)
Ubuntu 26.04+, Debian sid	lemma_0.1.0-1_amd64.deb	sudo apt install ./lemma_0.1.0-1_amd64.deb
Fedora 44+	lemma-0.1.0-1.fc44.x86_64.rpm	sudo dnf install ./lemma-0.1.0-1.fc44.x86_64.rpm
Arch Linux	lemma-0.1.0-2-x86_64.pkg.tar.zst	sudo pacman -U ./lemma-0.1.0-2-x86_64.pkg.tar.zst
Other Linux distributions	lemma-epsilon-linux-x86_64.tar.gz	tar xf lemma-epsilon-linux-x86_64.tar.gz && lemma-epsilon-linux-x86_64/install.sh
Source	Source code (zip, tar.gz)	See the README, "From source"

macOS in one command (installs the app, a lemma command and TeX):

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/dharmavati213/lemma/main/packaging/macos/install.sh)"

The macOS app is not notarized by Apple, so the first start is blocked: open System Settings
→ Privacy & Security and click Open Anyway (or run
xattr -dr com.apple.quarantine /Applications/Lemma.app). The one-command installer needs no
such step.

Linux packages use the system's GTK 4.22+, libadwaita 1.9+, GtkSourceView 5.18+, libspelling
and poppler-glib 26.01+, the libraries of GNOME 50 and later. Debian 13, Ubuntu 25.10, Fedora 43
and older releases do not have them yet. The tarball's install.sh checks for them and names the
packages to install; it installs into ~/.local (or /usr/local with sudo … --system) and
removes Lemma again with --uninstall.

Verify a download against SHA256SUMS:

sha256sum -c SHA256SUMS --ignore-missing          # Linux
shasum -a 256 -c SHA256SUMS --ignore-missing      # macOS

Requirements

• A TeX distribution with latexmk to build documents: TeX Live (the packages recommend it),
  MacTeX on macOS (the one-command installer sets it up).
• Optional: chktex (lint), texcount (word count), latexindent (formatting),
  mylatexformat (faster math previews), git (the git gutter).
• The Claude, Codex and Pi agents need Node.js and npm; the other agents their own command line
  tool. See the README, "Setting up the agent".

Known limitations

• macOS: Apple silicon and macOS 15 or later only; not notarized; shortcuts use Ctrl, not Cmd.
  macOS support is new: please report what does not work.
• Linux packages are for x86_64.

Every file below was built by GitHub Actions from this tag. Each Linux package was installed in a
fresh container of its distribution and the macOS app was started with Homebrew moved aside;
Lemma opened a document in each.