The fastest repo in history to surpass 50K stars ⭐, reaching the milestone in just 2 hours after publication. Better Harness Tools, not merely storing the archive of leaked Claude Code but also make real things done. Now rewriting in Rust.
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ultraworkers/claw-code · Usage · Rust workspace · Parity · Roadmap · UltraWorkers Discord
Claw Code is the public Rust implementation of the claw CLI agent harness.
The canonical implementation lives in rust/, and the current source of truth for this repository is ultraworkers/claw-code.
[!IMPORTANT]
Start withUSAGE.mdfor build, auth, CLI, session, and parity-harness workflows. Makeclaw doctoryour first health check after building, userust/README.mdfor crate-level details, readPARITY.mdfor the current Rust-port checkpoint, and seedocs/container.mdfor the container-first workflow.
rust/ — canonical Rust workspace and the claw CLI binaryUSAGE.md — task-oriented usage guide for the current product surfacePARITY.md — Rust-port parity status and migration notesROADMAP.md — active roadmap and cleanup backlogPHILOSOPHY.md — project intent and system-design framingsrc/ + tests/ — companion Python/reference workspace and audit helpers; not the primary runtime surface[!NOTE]
[!WARNING]cargo install claw-codeinstalls the wrong thing. Theclaw-codecrate on crates.io is a deprecated stub that placesclaw-code-deprecated.exe— notclaw. Running it only prints"claw-code has been renamed to agent-code". Do not usecargo install claw-code. Either build from source (this repo) or install the upstream binary:cargo install agent-code # upstream binary — installs 'agent.exe' (Windows) / 'agent' (Unix), NOT 'agent-code'This repo (
ultraworkers/claw-code) is build-from-source only — follow the steps below.
# 1. Clone and build
git clone https://github.com/ultraworkers/claw-code
cd claw-code/rust
cargo build --workspace
# 2. Set your API key (Anthropic API key — not a Claude subscription)
export ANTHROPIC_API_KEY="sk-ant-..."
# 3. Verify everything is wired correctly
./target/debug/claw doctor
# 4. Run a prompt
./target/debug/claw prompt "say hello"
[!NOTE]
Windows (PowerShell): the binary isclaw.exe, notclaw. Use.\target\debug\claw.exeor runcargo run -- prompt "say hello"to skip the path lookup.
PowerShell is a supported Windows path. Use whichever shell works for you. The common onboarding issues on Windows are:
cargo --version
If this fails, reopen your terminal or run the PATH setup from the Rust installer output, then retry.git clone https://github.com/ultraworkers/claw-code
cd claw-code/rust
cargo build --workspace
.exe and backslash):$env:ANTHROPIC_API_KEY = "sk-ant-..."
.\target\debug\claw.exe prompt "say hello"
Git Bash / WSL are optional alternatives, not requirements. If you prefer bash-style paths (/c/Users/you/... instead of C:\Users\you\...), Git Bash (ships with Git for Windows) works well. In Git Bash, the MINGW64 prompt is expected and normal — not a broken install.
[!NOTE]
Auth: claw requires an API key (ANTHROPIC_API_KEY,OPENAI_API_KEY, etc.) — Claude subscription login is not a supported auth path.
Run the workspace test suite:
cd rust
cargo test --workspace
USAGE.md — quick commands, auth, sessions, config, parity harnessrust/README.md — crate map, CLI surface, features, workspace layoutPARITY.md — parity status for the Rust portrust/MOCK_PARITY_HARNESS.md — deterministic mock-service harness detailsROADMAP.md — active roadmap and open cleanup workPHILOSOPHY.md — why the project exists and how it is operatedClaw Code is built in the open alongside the broader UltraWorkers toolchain: