Hatcheck

Several Claude accounts on one computer, each kept apart: isolated Claude Desktop instances on macOS, and Claude Code CLI profiles, with recent sessions, plan usage and resume commands across all of them. OpenAI's Codex CLI gets the same treatment, Google's Antigravity CLI (agy) is read beside them, and sessions can be carried between the three.

Unofficial: not made by, affiliated with or endorsed by Anthropic, OpenAI or Google. Claude, Claude Code and Claude Desktop are trademarks of Anthropic; Codex and ChatGPT are trademarks of OpenAI; Antigravity and Gemini are trademarks of Google LLC.

On macOS, hatcheck desktop runs one Claude Desktop per account, side by side, a personal one and a work one, say: each with its own data folder and login, and a launcher in a colour you pick, which brings the running one forward rather than opening it twice.

Running Claude Desktop with its own --user-data-dir is Philipp Stracker's approach (write-up); hatcheck adds the colours and the launchers.

It also has command-line tools for Claude Code, Codex and Antigravity CLI, for keeping one profile per account: cl and cx run Claude Code and Codex with a profile, and hatcheck lists the recent sessions in all of them, with the command that resumes each one and what's left of each plan. The rest of the commands find, show, carry and convert sessions between the accounts and the agents, tie folders to accounts, and check how everything is installed: see the tour below, and docs/commands.md for each command as it is.

Not a gateway. Hatcheck is never between an agent and its model. It rewrites no agent's config, holds no login, and runs nothing in the background. Tools such as magpie put a local gateway in that path so any agent can use any model and accounts can take over from each other when a quota runs out. If that is what you want, use one of those. Hatcheck is for the opposite case: keeping a work account and a personal account apart, and knowing which one each session ran on. See Rules it keeps.

Claude Desktop instances (macOS)

hatcheck desktop makes them: each instance gets its own data folder, ~/.claude-instances/<name>, and a launcher in /Applications with Claude's icon in a colour you pick. The launcher brings a running instance's window forward instead of starting a second one on the same folder.

hatcheck desktop new work Work --hue 190          # Claude Work.app, blue
hatcheck desktop new personal Personal --hue -10  # Claude Personal.app, red-orange
hatcheck desktop open work                        # or open it from Launchpad or the Dock
hatcheck desktop                                  # the instances, and which are running
hatcheck desktop remove work                      # its launcher; --data deletes its data folder too

Sign each one in to its account the first time it opens. The first time a launcher brings a window forward, macOS asks whether it may control System Events; allow it, once per launcher. --hue turns the icon's colours by that many degrees (about 110 is green, 190 blue, 240 purple) and --saturation scales them. hatcheck recolours the icon itself, with macOS's iconutil, and a launcher it can't recolour keeps Claude's own icon. The name default makes a launcher for Claude's built-in data folder, which is only safe while nothing else runs on that folder, the stock Claude icon included. docs/desktop-instances.md has the rest: what the launcher does, and how to copy a login you already have into an instance.

Claude Code, Codex and Antigravity CLI

Claude Code (the claude CLI) keeps its settings, history and session transcripts in ~/.claude (plus ~/.claude.json), and its login in the macOS Keychain, or on Linux and Windows in ~/.claude/.credentials.json. Point CLAUDE_CONFIG_DIR at another folder and you get a separate profile with its own login, so you can keep one per account: ~/.claude-work, ~/.claude-personal, and so on. These are separate from the Desktop instances above, though sessions from Desktop's Code tab can be filed in them too (the session list hides those unless you pass --all). Codex works the same way with CODEX_HOME: see cx. Antigravity CLI keeps everything under ~/.gemini/antigravity-cli, which only HOME moves, so hatcheck reads that one folder: see Antigravity CLI.

Install

One binary per platform, with no Python needed. Each of these installs hatcheck, hat, cl, cx, claude-z and claude-k:

curl -LsSf https://github.com/hatcheck/hatcheck/releases/latest/download/hatcheck-installer.sh | sh
brew install hatcheck/tap/hatcheck  # Homebrew, on macOS and Linux
uv tool install hatcheck            # or: pipx install hatcheck

On Windows, in PowerShell:

powershell -ExecutionPolicy Bypass -c "irm https://github.com/hatcheck/hatcheck/releases/latest/download/hatcheck-installer.ps1 | iex"

The installer scripts put the commands in ~/.local/bin and add that folder to your PATH; set HATCHECK_NO_MODIFY_PATH=1 first to keep your shell's startup files as they are. Each release, made from a tag such as v0.2.0, has them and the binaries for each platform, and PyPI gets the same binaries as wheels. The release builds start after 0.1.0, which is the Python version.

From a clone, on Windows, switching between installs or removing one, and hatcheck doctor, which lists every copy on your PATH: docs/install.md.

The commands

Each is documented as it is, with its options and what it prints, in docs/commands.md; the launchers and the agents' folders in docs/agents.md.

hat is the short name, and a subcommand can be cut to its first letters: hat m is hat move. Antigravity CLI sessions are listed, shown and converted from its one folder, with what its /usage reports; claude-z and claude-k run Claude Code on Z.ai's or Kimi's models in any profile.

Rules it keeps

Each rule names the code that keeps it, so it can be checked rather than taken on trust.

• Not in the path. Nothing of Hatcheck sits between an agent and its model. cl and cx set CLAUDE_CONFIG_DIR or CODEX_HOME (and, for cl -z and cl -k, the provider variables you set up) and run the agent in their place; nothing stays running (launch.rs, run).
• No agent's config is rewritten, except when you ask: hatcheck bind --hook adds one session-start hook to each profile's settings.json, each Codex home's hooks.json and Antigravity CLI's ~/.gemini/config/hooks.json, or points the one it added at the hatcheck it finds now, and unbind --hook removes only what it added (bind.rs, add_hooks and remove_hooks).
• No credentials. It never asks for, stores, refreshes or moves a login. For Claude it never reads one: Claude Code's own /usage is run in the profile and the snapshot it saves is read (usage.rs, run_claude_usage and claude_live). For Codex, the home's auth.json token is sent only to ChatGPT's usage endpoint, as it is, and never refreshed (read_codex_login and fetch_codex_usage there). For agy it never reads one either: agy's own /usage is run, after agy models has said agy is signed in, since asked without a sign-in agy would start one (agy.rs, run_usage and signed_in).
• Nothing leaves your computer except those usage requests: Claude Code's to Anthropic, one to ChatGPT per Codex account, and agy's own /usage to Google, with the model list agy fetches first to say it's signed in. CODEX_USAGE_URL in usage.rs is the one address the binary itself calls; --cached and --no-usage make none. The Z.ai and Kimi endpoints in provider.rs are handed to Claude Code, which calls them only when you run cl -z or cl -k.
• No automatic switching between accounts. hatcheck best ranks and prints commands, and nothing in the binary starts, moves or switches a session on its own (best.rs: advice only, --wait sleeps and then prints).
• Nothing runs in the background. There's no daemon. hatcheck serve is the desktop app's engine and lives only while the app does, one command per line (serve.rs).
• Sessions are only ever moved, copied or rewritten in ways you can undo. move deletes the original only once every copied file is checked against it, never puts an older copy over a newer one, and is undone by moving the session back; fork keeps the original; relocate prints the command that undoes it; and all three have --dry-run, which runs every check and writes nothing (move_cmd.rs, relocate.rs).

Function names rather than line numbers, since lines move; git grep finds them.

The desktop app

A menu-bar app (system tray on Windows and Linux) built on the CLI. It shows what's left of every plan, sorted by Fable, with bars and reset times, and the last day's sessions with Resume, which opens a terminal in the session's folder, and Copy. It also has buttons for the Claude Desktop instances and notifies you when a limit runs low or resets.

Its main window browses every session, with search, filters and a read-only preview of the conversation. From there you can resume a session, copy its command, or move or fork it to another profile after a dry run. The window also lists profiles and homes, signs in to a new one in a terminal, and makes Desktop instances.

It ships the CLI inside itself, so it needs no Python. It never handles a login, and live usage is off until you turn it on. See desktop/README.md to build and test it, with npm run demo running it against a demo home rather than your profiles; releases come from .github/workflows/desktop.yml for macOS, Windows and Linux. The plan behind it is the proposal.

Files in this repo

• crates/hatcheck/: hatcheck in Rust, the commands and the launchers. Its src/ has a file per subcommand (sessions.rs, usage.rs, move_cmd.rs, open_cmd.rs, desktop.rs and the rest), launch.rs for cl, cx, claude-z and claude-k, agy.rs for what it reads of Antigravity CLI, doctor.rs for hatcheck doctor, and src/bin/ for those binaries and hat. Its own README is the crate's page on crates.io. It was ported from a Python version with the same output; see docs/rust-port.md.
• CHANGELOG.md: what changed in each release of the CLI; a release's notes on GitHub are its section there.
• install.sh / install.ps1: build the commands from a clone and put them on your PATH (~/.local/bin by default).
• pyproject.toml: the PyPI package, the binaries as wheels built with maturin. dist-workspace.toml: the release builds, installers and Homebrew formula, made by cargo-dist. packaging/: the app's Homebrew cask, and the winget manifests for the app and the CLI.
• desktop/: the desktop app: Tauri, with the CLI inside it (its README).
• site/: the landing page, one self-contained file, served at hatcheck.dev from Cloudflare as static assets; site/deploy.sh ships it. The logo lives there too: logo.svg and logo-dark.svg (the mark), logo-wordmark.svg and logo-wordmark-dark.svg, favicon.svg.
• docs/proposals/: the plans these came from: the CLI features and the desktop app.
• docs/: commands.md, agents.md and install.md, each command, agent and way of installing as it is; desktop-instances.md for the Desktop instances; rust-port.md on the port from Python.
• AGENTS.md and docs/lessons.md: notes for coding agents (CLAUDE.md imports them): how to build and check, the rules the code keeps, and what earlier work got wrong, with the rule that would have caught it.
• tests/: the command tests, which run the binary against throwaway home folders: python3 -m unittest discover -s tests, which builds it with cargo first, and the crate's own tests with cargo test -p hatcheck. They never read your real profiles, Keychain or the network. GitHub Actions runs both on macOS, Linux and Windows (.github/workflows/tests.yml).

Roadmap

• Claude Desktop instances on Windows. Claude Desktop is an Electron app there too, so a separate --user-data-dir per account should work. A Windows version would create a shortcut per instance with its own icon, and a launcher that brings a running instance forward instead of opening a duplicate. It needs testing on a Windows machine first.
• Linux. There's no official Claude Desktop for Linux, so only the CLI tools apply there.
• Antigravity CLI profiles. agy keeps one login per home folder, so a second account needs a home folder of its own (HOME=~/.agy-work agy), which every command the agent runs would see too. Whether hatcheck should make such folders, and a launcher for them, is still open; until then it reads ~/.gemini/antigravity-cli only. The Antigravity app has the same one login, in the system keyring, shared with agy, so an instance of it with its own data folder would still be the same account; nothing for hatcheck to make until Google separates logins.
• Releases: the CLI is on GitHub, the Homebrew tap, PyPI and crates.io from 0.2.0 (CHANGELOG.md). Next are winget, then the app's installers, once its release workflow has its signing and updater secrets (desktop.yml lists them).
• Signing: a Developer ID for the macOS app, and a certificate for the Windows one.

Credits

• Claude Desktop instances: this repo started as a fork of Aaron Oxborrow's gist, whose scripts made colour-coded launchers for isolated instances. On 16 October 2026 his scripts and his sections of this README were replaced by a rewrite, hatcheck desktop, so none of his code or text remains. The idea both implement, running Claude Desktop with --user-data-dir, is from Philipp Stracker's gist (write-up), itself a cleaned-up version of weidwonder/claude-desktop-multi-instance.
• Claude Code and Codex CLI tools: hatcheck, cl, cx, the installers and the tests are by Yi Wang.
• Z.ai and Kimi: the provider settings in crates/hatcheck/src/provider.rs (endpoints, model slots, context windows and the config files) come from claude-z by Kerim (lettt325), MIT-licensed, and Yi Wang's fork of it, which added Kimi.

License

MIT, see LICENSE. It covers everything in this repo: the CLI, the desktop app, the site and the docs.