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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 ca09b6b374 ROADMAP #114: /session list and --resume disagree after /clear; reported session_id unresumable; .bak files invisible; 0-byte files fabricate phantoms 
Dogfooded 2026-04-18 on main HEAD 43eac4d from /tmp/cdNN and /tmp/cdOO.

Three related findings on session reference resolution asymmetry:

1. /clear divergence (primary):
   - /clear --confirm rewrites session_id inside the file header
     but reuses the old filename.
   - /session list reads meta header, reports new id.
   - --resume looks up by filename stem, not meta header.
   - Net: /session list reports ids that --resume can't resolve.

   Concrete:
     claw --resume ses /clear --confirm
       → new_session_id: session-1776481564268-1
       → file still named ses.jsonl, meta session_id now the new id
     claw --resume ses /session list
       → active: session-1776481564268-1
     claw --resume session-1776481564268-1
       → ERROR session not found

2. .bak files filtered out of /session list silently:
   ls .claw/sessions/<bucket>/
     ses.jsonl    ses.jsonl.before-clear-<ts>.bak
   /session list → only ses.jsonl visible, .bak zero discoverability
   is_managed_session_file only matches .jsonl and .json.

3. 0-byte session files fabricate phantom sessions:
   touch .claw/sessions/<bucket>/emptyses.jsonl
   claw --resume emptyses /session list
     → active: session-<ms>-0
     → sessions: [session-<ms>-1]
     Two different fabricated ids, neither persisted to disk.
     --resume either fabricated id → 'session not found'.

Trace:
  session_control.rs:86-116 resolve_reference:
    handle.id = session_id_from_path(&path)     (filename stem)
                .unwrap_or_else(|| ref.to_string())
    Meta header NEVER consulted for ref → id mapping.

  session_control.rs:118-137 resolve_managed_path:
    for ext in [jsonl, json]:
      path = sessions_root / '{ref}.{ext}'
      if path.exists(): return
    Lookup key is filename. Zero fallback to meta scan.

  session_control.rs:228-285 collect_sessions_from_dir:
    on load success: summary.id = session.session_id    (meta)
    on load failure: summary.id = path.file_stem()      (filename)
    /session list thus reports meta ids for good files.

  /clear handler rewrites session_id in-place, writes to same
  session_path. File keeps old name, gets new id inside.

  is_managed_session_file filters .jsonl/.json only. .bak invisible.

Fix shape (~90 lines):
- /clear preserves filename's identity (Option A: keep session_id,
  wipe content). /session fork handles new-id semantics (#113).
- resolve_reference falls back to meta-header scan when filename
  lookup fails. Covers legacy divergent files.
- /session list surfaces backups via --include-backups flag OR
  separate backups: [] array with structured metadata.
- 0-byte session files produce SessionError::EmptySessionFile
  instead of silent fabrication. Structured error, not phantom.
- regression tests per failure mode.

Joins Session-handling: #93 + #112 + #113 + #114 — reference
resolution + concurrent-modification + programmatic management +
reference/enumeration asymmetry. Complete session-handling cluster.

Joins Truth-audit — /session list output factually wrong about
what is resumable.

Cross-cluster with Parallel-entry-point asymmetry (#91, #101,
#104, #105, #108) — entry points reading same underlying data
produce mutually inconsistent identifiers.

Natural bundle: #93 + #112 + #113 + #114 (session-handling
quartet — complete coverage).

Alternative bundle: #104 + #114 — /clear filename semantics +
/export filename semantics both hide identity in filename.

Filed in response to Clawhip pinpoint nudge 1494895272936079493
in #clawcode-building-in-public.
 		2026-04-18 12:09:31 +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 #114: /session list and --resume disagree after /clear; reported session_id unresumable; .bak files invisible; 0-byte files fabricate phantoms 2026-04-18 12:09:31 +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.