lich

README

lich

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Run your coding agents side by side, each on its own branch.
Claude Code, Codex, opencode or the agent you already use, each in its own worktree, all in one window.

Download lich · lichdotdev.github.io/lich

Features

Agents side by side Put sessions on a wall and lich lays out the panes for you. See at a glance which one is busy, which one is waiting on you and how much context it has left.

A worktree per task, no setup Branch a session off any base and lich copies your .env files and gives it a free dev-server port. Your uncommitted work can come along.

Review the diff, comment the lines Read what the agent changed next to its session, comment on the lines that need work and send every note back as one prompt.

Point at the page, tell the agent The agent drives a browser in a tab beside its session, and you use the same page. Point at what's wrong, leave a note on it and send every note back as one prompt.

Pull requests without the browser Open a pull request, ask the branch's agent to write it, review it inline and merge it, all from the same window.

Make it yours Import a theme as JSON or install one from a git repository. Docs →

And also:

• Sessions that delegate. One agent hands a task to another session and gets the answer back. The same works from your shell with the lich command (docs).
• Sandboxed agents. Let an agent skip permission prompts inside a sandbox that can't see your keys, your credentials or your other repositories (limits).
• Your dev servers in the sidebar. Save what a project keeps running and start or stop it with one click.
• Find anything. Ctrl/Cmd+K jumps to a session by name or by something said in it.
• Know when you're needed. A desktop notification when a session is waiting on you.

Install

curl -fsSL https://raw.githubusercontent.com/lichdotdev/lich/main/install.sh | sh

One line: it detects your distro, checks the download and installs lich with your package manager.

Platform	Get it
Linux	install.sh above, or AUR lich-bin (yay -S lich-bin). Needs zenity and glibc 2.34 or newer (Debian 12, Ubuntu 22.04, RHEL 9 and up).
macOS	brew install --cask lichdotdev/tap/lich
Windows	Installer or portable zip from Releases, or scoop install https://github.com/lichdotdev/lich/releases/latest/download/lich.json

The macOS and Windows builds are not signed yet, so Gatekeeper and SmartScreen warn on a download from Releases; Homebrew skips the Gatekeeper prompt. Per-distro packages, the Linux tarball, clearing the quarantine flag and upgrading from the old Homebrew formula are in INSTALL.md.

Getting started

1. Open a project. The + in the tab strip lists what you closed recently and opens a folder picker. Point it at a git repository.
2. Pick your agent. The first launch lists the agents it found on your machine. Settings › Providers sets the default and each binary's path.
3. Start a session. New Session opens your agent in the project. The + on a checkout's header opens any agent, or a plain terminal, in that checkout.
4. Give it a worktree (optional). Create one from any base branch and lich opens a fresh session in it.

Provider support

Every agent runs in a real terminal, resumes its conversation, works in the sandbox and reaches your other sessions. What changes from one to another is what lich can read back out of it, since each CLI records different things.

See what each agent supports

What you get	Claude Code	Codex	Antigravity	opencode	oh-my-pi	Crush	Cursor CLI	Kiro CLI
Context window in the footer	yes	yes	no	no	no	no	no	yes
How much of the last turn came from the prompt cache, in the footer	yes	yes	no	in the cost tooltip	in the cost tooltip	no	no	no
The card's tooltip names the model running, and the one it opened on if it changed	yes	yes	no	no	no	no	no	yes
Cost in the footer	yes	yes	no	yes	yes	yes	no	credits
How much of your plan is left	yes	yes	yes	OpenCode Go only	no	no	yes	no
A turn your plan's usage limit stopped picks up again once the limit resets	yes	yes	no	its own retries	its own retries	no	no	no
Spinner while a turn runs, ring when it ends	yes	yes	yes	yes	yes	no	yes	yes
The card names itself after the conversation	yes	after your first prompt	after your first prompt	yes	yes, from the second turn	no	yes, once the first turn ends	after your first prompt, once the first turn ends
A pull request the agent opens shows on its card when the turn ends	yes	yes	yes	yes	yes	no, once the window regains focus	yes	yes
Repaints in the new look when you switch lich between a light and a dark theme	yes	no	no	yes	yes	no	yes	no
Bell when the agent is blocked on you	yes	yes	no	yes	no	no	no	no
Ctrl+Shift+Y jumps to the next session waiting on you	yes	yes	no	yes	no	no	no	no
The card says when the conversation is being compacted	yes	no	no	no	no	no	no	no
Sidebar filter by state: Waiting, Running, Unread	yes	yes	no Waiting	yes	no Waiting	no, always Idle	no Waiting	no Waiting
Run by your agent inside another session (claude -p, cursor-agent -p), it stays out of that session's card	yes	yes	yes	yes	yes	yes	yes	no
Machine kept out of idle sleep while a turn runs	yes	yes	yes	yes	yes	no	yes	yes
Review tab's Last turn, with the agent's recap	yes	yes	yes	yes	yes	no	yes	yes
Search the conversation from the palette	yes	yes	yes	yes	yes	yes	no	yes
Resume a conversation started outside lich, from the palette's History tab	yes	yes	yes	yes	yes	Linux; macOS and Windows untested	yes	yes
A long paste can land as editable text instead of a folded placeholder (Settings › Providers, off by default)	yes	no	no	yes	not measured	no, it becomes a paste_N.txt attachment	no	yes
Fork a conversation into a new worktree, or in its own checkout	yes	yes	no	yes	no	no	no	no
A fork hangs from its source session in the sidebar's tree	yes	yes	no	yes	no	no	no	no
Warned when you resume, from the agent's own app, a conversation another card has open	yes	on your next prompt	on your next prompt, untested	no	yes	at its next tool call	no	yes
Open a session at a chosen reasoning effort	yes	yes	yes	no	yes	no	in the model name	yes
Open a session with ultracode on	yes	no	no	no	no	no	no	no
Several accounts side by side as profiles, each with its own full login, and a session moved to another account carrying on in the same card (Settings › Providers)	yes	yes, with its own plugins in each profile and Personal's settings shared by all of them	no	yes, logged in from a terminal card; a session cannot move to another profile, since its conversations sit in the database that holds the login	yes, logged in from a terminal card, with its settings shared by every profile	not measured	Linux and Windows (on macOS its login is in the Keychain), logged in from a terminal card, with mcp.json, hooks and skills shared by every profile	Linux only (macOS keeps its login in the Keychain, and on Windows nothing moves it), logged in from a terminal card, with its conversations shared by every profile
A folder you trusted in your main account opens without the "trust this folder?" question in every other profile	yes	yes	no profiles	asks nothing	asks nothing	not measured	yes	asks nothing
A sandboxed session opens without the "trust this folder?" question	yes	yes	yes	asks nothing	asks nothing	yes, and it no longer asks to initialize the project	yes	asks nothing
A worktree of a folder you trusted opens without the "trust this folder?" question	yes	yes	yes	asks nothing	asks nothing	yes, and it no longer asks to initialize the project	yes	asks nothing
Drive a running session from lich control or an agent: prompt, stop, model, effort, slash command	yes	no	no	no	no	no	no	no
A message from another session arrives without being typed into the terminal	yes	no	no	no	no	no	no	no
A subagent the agent starts runs as a lich session with its own card, in the asking session's checkout, hands its full report back and closes once done; its own subagents get cards too, one level down	yes	no	no	no	no	no	no	no
Ask a running session a side question without stopping it (lich ask)	yes	no	no	no	no	no	no	no
Context, cost and plan usage as the CLI measured them itself	yes	no	no	no	no	no	no	no
The terminal's status line shows who the session owes an answer, who it is waiting on, and answers ready to collect	yes	no	no	no	no	no	no	no
Delegate privately from a subagent or workflow step	yes	yes	yes	yes	yes	yes	yes	yes
A resumed session keeps the model and effort it was on	model only	yes	no	model	yes	no	model	model; effort untested
A result still waits for you after you interrupt a wait for it	yes	yes	yes	yes	no	yes	yes	yes
A task you hand another session reports back "unanswered" as soon as that agent ends its turn without replying	yes	yes	yes	yes	yes	no, waits for the deadline	yes	yes
lich's own messages to the agent (handed tasks, results ready, notices) in the prompt language you pick	yes	yes	yes	yes	yes	yes	yes	yes
Told at spawn, in the prompt language, to fan work out as lich sessions rather than hidden subagents	yes	no	no	no	yes	no	no	no
The session card opens a browser its agent drives, in a tab beside the session	yes	yes	yes	yes	yes	yes	yes	yes

Every gap is deliberate, and docs/ceilings.md says what was measured behind each one.

Configuration

• Providers. Settings › Providers sets each agent's binary and the default for every project; a project can choose its own. With no path set, lich runs the first binary on your login shell's PATH and lich doctor warns when there is more than one version.
• Footer. Settings › Appearance: drag its items to choose what it shows. The cost starts hidden, since it only means something when you pay per token.
• Worktrees. A .worktreeinclude file in the project picks which gitignored files a new worktree gets.
• Session hooks. Install the lich plugin from Settings and a session names its own card and refreshes git the moment it writes a file.
• Scripting. docs/stability.md says which parts of lich are safe to script against.

Privacy & updates

Everything runs on your machine: no account, no sign-in, no telemetry. lich only goes to the network for:

• Updates: a version check against GitHub Releases at startup and hourly, and the lich plugin's release list at startup.
• Plan usage: each provider's own usage endpoint (Anthropic, OpenAI, Cursor, OpenCode Go), with the login the agent already uses, at most every five minutes. Antigravity's plan is read from agy itself.
• Prices: LiteLLM's public price table on GitHub, once, for a model the bundled table does not know.

The Windows installer updates in place; Homebrew, Scoop, AUR and the Linux packages update through their package manager, and lich gives you the command. Something broken? lich doctor checks your setup and lich rage packs a bug report into one archive without uploading it. Settings › Help says what the log carries (paths, project and branch names, your gh login, never a session token) before you attach it. Bugs and feature requests go to Issues; what changed in each version is in CHANGELOG.md.

Build from source

lich is two binaries: lich, a static pure-Go backend, and lich-native, the window, built with cgo from native/. You need Go 1.27.0+ and Task; the window also needs a C toolchain, Gio's system packages and a libghostty-vt built from the commit in native/GHOSTTY_COMMIT. native/slice.sh says how, and docs/native-window.md covers the window.

task build          # backend binary -> bin/lich
task build:native   # window -> bin/lich-native
task run            # build + run
task test           # Go suites
task package        # .deb + .rpm + Arch .pkg.tar.zst in bin/ (needs nfpm)

Adding another agent touches a dozen files across two repositories: docs/adding-a-provider.md is the map.

Sponsors

lich is written and maintained by one person. Sponsoring pays for the time that goes into it and keeps the project independent: there is no paid tier of the app and there will not be one.

Become a sponsor

Backers

Nobody yet.

License

AGPL-3.0-only © 2026 omartelo

lich is free software: you can use, study, modify and redistribute it under the terms of the GNU Affero General Public License v3. Any distributed or network-served derivative must be released under the same license. Releases up to and including v0.9.0 remain MIT-licensed.