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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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YeonGyu-Kim 9882f07e7d ROADMAP #88: unbounded CLAUDE.md ancestor walk = prompt injection via /tmp 
Dogfooded 2026-04-17 on main HEAD 82bd8bb from
/tmp/claude-md-injection/inner/work. discover_instruction_files at
runtime/src/prompt.rs:203-224 walks cursor.parent() until None with
no project-root bound, no HOME containment, no git boundary. Four
candidate paths per ancestor (CLAUDE.md, CLAUDE.local.md,
.claw/CLAUDE.md, .claw/instructions.md) are loaded and inlined
verbatim into the agent's system prompt under '# Claude instructions'.

Repro: /tmp/claude-md-injection/CLAUDE.md containing adversarial
guidance appears under 'CLAUDE.md (scope: /private/tmp/claude-md-
injection)' in claw system-prompt from any nested CWD. git init
inside the worker does not terminate the walk. /tmp/CLAUDE.md alone
is sufficient -- /tmp is world-writable with sticky bit on macOS/
Linux, so any local user can plant agent guidance for every other
user's claw invocation under /tmp/anything.

Worse than #85 (skills ancestor walk): no agent action required
(injection fires on every turn before first user message), lower
bar for the attacker (raw Markdown, no frontmatter), standard
world-writable drop point (/tmp), no doctor signal. Same structural
fix family though: prompt.rs:203, commands/src/lib.rs:2795
(skills), and commands/src/lib.rs:2724 (agents) all need the same
project_root / HOME bound.

Fix shape (~30-50 lines): bound ancestor walk at project root /
HOME; add doctor check that surfaces loaded instruction files with
paths; add settings.json opt-in toggle for monorepo ancestor
inheritance with 'source: ancestor' annotation.

Filed in response to Clawhip pinpoint nudge 1494691430096961767 in
#clawcode-building-in-public.
 		2026-04-17 22:33:13 +09:00
.claude/sessions fix: tool input {} prefix bug, tool display after accumulation, max_iterations unlimited 2026-04-01 02:24:18 +00:00
.github Close the clawability backlog with deterministic CLI output and lane lineage 2026-04-05 18:41:02 +00:00
assets Refresh docs to match ultraworkers/claw-code source of truth 2026-04-05 18:11:25 +00:00
docs US-010: Add model compatibility documentation 2026-04-16 10:55:58 +00:00
rust US-024: Add token limit metadata for kimi models 2026-04-17 04:15:38 +00:00
src chore: additional AI slop cleanup and enforcer wiring from sessions 1/5 2026-04-03 18:35:27 +09:00
tests Rewriting Project Claw Code - Python port with Rust on the way 2026-03-31 08:16:20 -07:00
.claude.json feat: default OAuth config for API endpoint, merge UI polish rendering 2026-04-01 03:20:26 +00:00
.gitignore Keep local clawhip artifacts from tripping routine repo work 2026-04-12 14:47:40 +00:00
CLAUDE.md feat: default OAuth config for API endpoint, merge UI polish rendering 2026-04-01 03:20:26 +00:00
Containerfile Document a repeatable container workflow for the Rust workspace 2026-04-05 18:11:25 +00:00
PARITY.md docs(PARITY.md): comprehensive status update — all 9 lanes merged, stubs replaced 2026-04-03 19:39:28 +09:00
PHILOSOPHY.md docs: add philosophy document for autonomous claw development 2026-04-04 16:51:51 +00:00
README.md Make ACP/Zed status obvious before users go source-diving 2026-04-16 03:13:50 +00:00
ROADMAP.md ROADMAP #88: unbounded CLAUDE.md ancestor walk = prompt injection via /tmp 2026-04-17 22:33:13 +09:00
USAGE.md Align auth docs with the removed login/logout surface 2026-04-11 17:28:47 +00:00
install.sh feat: b6-codex-session — batch 6 2026-04-07 15:52:30 +09:00
prd.json US-024: Add token limit metadata for kimi models 2026-04-17 04:15:38 +00:00
progress.txt US-011: Performance optimization for API request serialization 2026-04-16 11:11:45 +00:00

README.md

Claw Code

ultraworkers/claw-code · Usage · Rust workspace · Parity · Roadmap · UltraWorkers Discord

Star history for ultraworkers/claw-code

Claw Code

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 with USAGE.md for build, auth, CLI, session, and parity-harness workflows. Make claw doctor your first health check after building, use rust/README.md for crate-level details, read PARITY.md for the current Rust-port checkpoint, and see docs/container.md for the container-first workflow.

ACP / Zed status: claw-code does not ship an ACP/Zed daemon entrypoint yet. Run claw acp (or claw --acp) for the current status instead of guessing from source layout; claw acp serve is currently a discoverability alias only, and real ACP support remains tracked separately in ROADMAP.md.

Current repository shape

  • rust/ — canonical Rust workspace and the claw CLI binary
  • USAGE.md — task-oriented usage guide for the current product surface
  • PARITY.md — Rust-port parity status and migration notes
  • ROADMAP.md — active roadmap and cleanup backlog
  • PHILOSOPHY.md — project intent and system-design framing
  • src/ + tests/ — companion Python/reference workspace and audit helpers; not the primary runtime surface

Quick start

[!NOTE] [!WARNING] cargo install claw-code installs the wrong thing. The claw-code crate on crates.io is a deprecated stub that places claw-code-deprecated.exe — not claw. Running it only prints "claw-code has been renamed to agent-code". Do not use cargo 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 is claw.exe, not claw. Use .\target\debug\claw.exe or run cargo run -- prompt "say hello" to skip the path lookup.

Windows setup

PowerShell is a supported Windows path. Use whichever shell works for you. The common onboarding issues on Windows are:

  1. Install Rust first — download from https://rustup.rs/ and run the installer. Close and reopen your terminal when it finishes.
  2. Verify Rust is on PATH: 
    cargo --version
    If this fails, reopen your terminal or run the PATH setup from the Rust installer output, then retry.
  3. Clone and build (works in PowerShell, Git Bash, or WSL): 
    git clone https://github.com/ultraworkers/claw-code
cd claw-code/rust
cargo build --workspace
  4. Run (PowerShell — note .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

Documentation map

Ecosystem

Claw Code is built in the open alongside the broader UltraWorkers toolchain:

Ownership / affiliation disclaimer

  • This repository does not claim ownership of the original Claude Code source material.
  • This repository is not affiliated with, endorsed by, or maintained by Anthropic.