Show HN: Limitbreak – Claude Code switches accounts mid-session on a limit

A developer released Limitbreak, an open-source local proxy written as a single Go binary using only the standard library, that lets one Claude Code install rotate across multiple Claude accounts when an account's 5-hour or weekly usage window is exhausted. The proxy sits at 127.0.0.1:48617 between the claude client and api.anthropic.com, and only switches accounts on a 429 response carrying the anthropic-ratelimit-unified-status: rejected header, marking that account spent until its reset time and replaying the same request on the next account before Claude Code sees the error. Limitbreak requires Go 1.22+ to build, runs on macOS or Linux, sends only /v1/messages* requests on an account's token while routing connectors, MCP and artifacts through Claude Code's own credentials, and reads logins from the macOS Keychain or each ~/.claude-<name> config directory's .credentials.json.

★ L I M I T B R E A K ★ ADA ██████████ LIMIT → spent GRACE ░░░░░░░░░░ ready → takes the hit Use several Claude accounts from one Claude Code install, and switch between them automatically when an account's usage limit is hit, without restarting the session or losing its history. A small local proxy a single Go binary, standard library only, a few MB of RAM sits between claude and Anthropic's API. It sends each request on the active account's own login. When Anthropic answers that the account's 5-hour or weekly window is spent, the proxy remembers that account until its reset time and replays the same request on the next account before Claude Code ever sees the error. To the session nothing happened. claude ──ANTHROPIC BASE URL──▶ proxy 127.0.0.1:48617 ──▶ api.anthropic.com │ active account's token └─ 429 "rejected"? mark spent, retry on the next account Try it without touching any real login: limitbreak video plays a simulated switch in your terminal as a little arcade battle. git clone https://github.com/radu2lupu/limitbreak && cd limitbreak ./install.sh builds and starts the background service echo 'source "$HOME/.local/bin/limitbreak-shell.sh"' ~/.zshrc or ~/.bashrc limitbreak add sign in another account browser , repeat per account Open a new terminal and run claude as usual. When one account's limit is hit, the next one answers. - Only /v1/messages requests are sent on an account's token. Everything else claude.ai connectors, MCP, artifacts, profile goes through untouched with Claude Code's own credentials, so those keep working. - It never sets CLAUDE CODE OAUTH TOKEN that makes Claude Code drop its connectors and local MCP servers . - Accounts are the logins Claude Code already holds: the default one plus every ~/.claude-<name config directory that has a login. Tokens are read from the macOS Keychain item Claude Code keeps per config dir, or from <dir /.credentials.json . They are never copied, logged, or exposed by GET / status . - An expired token is refreshed by running one tiny claude -p under that account's directory, so Claude Code stays the only thing that refreshes a login. - If no account can serve a request, it passes through with Claude Code's own login: never worse than no proxy. - Only a window rejection 429 with anthropic-ratelimit-unified-status: rejected switches accounts. Ordinary rate limits go back to Claude unchanged. Needs Go 1.22+ to build, macOS or Linux. Prebuilt binaries are attached to each release https://github.com/radu2lupu/limitbreak/releases . git clone https://github.com/radu2lupu/limitbreak cd limitbreak ./install.sh builds, installs ~/.local/bin/limitbreak, starts a launchd / systemd user service Then add the printed line to ~/.zshrc or ~/.bashrc : source "$HOME/.local/bin/limitbreak-shell.sh" That defines a claude function that points Claude Code at the proxy when it is running and runs plain claude when it is not. Use ./install.sh --binary <prebuilt on a host without Go. limitbreak add signs in a new account in your browser, names it account-N limitbreak add work or pick the name limitbreak list accounts, who they are, which one is active limitbreak remove work sign it out and delete its login from this machine add runs Claude Code's own browser sign-in into its own config directory ~/.claude-<name , checks the login landed, tells you which email it is, and warns if you added the same account twice. The running proxy picks it up within 30 seconds; no restart. The default account is whatever plain claude auth login signs in. Raw status for scripts: curl -s http://127.0.0.1:48617/ status . Every switch is logged ~/Library/Logs/limitbreak.log on macOS, the journal on Linux : the account that ran out, when it resets, and the one now serving. limitbreak serve --port 48617 --upstream https://api.anthropic.com --home ~ --credentials auto|keychain|file A request path may begin with / c/<client / to give a client an agent, a tool its own active account; the prefix is stripped before forwarding. - Terms of service. This uses the official claude binary with accounts you own, but spreading load across subscription accounts may conflict with Anthropic's terms for your plan. Read them; you are responsible for your use. Not affiliated with or endorsed by Anthropic. - Don't copy a login between machines. Refresh tokens rotate; two machines holding the same one will log each other out. Sign in once per machine. - Headless hosts. On macOS over SSH the Keychain is locked; run the proxy as a user service in the login session what install.sh does . - The reset time is read from Anthropic's response headers, which are not a documented contract and may change. macOS: launchctl bootout gui/$ id -u /dev.limitbreak; rm ~/Library/LaunchAgents/dev.limitbreak.plist . Linux: systemctl --user disable --now limitbreak . Then remove ~/.local/bin/limitbreak and the source line from your shell profile. Accounts you added stay as ordinary ~/.claude-<name logins; limitbreak remove <name deletes one. go vet ./... && go test ./... MIT, see LICENSE https://github.com/radu2lupu/limitbreak/blob/main/LICENSE .