Spawn, message, and coordinate AI coding agents across Claude Code, Codex, Copilot, Pi, Kilo, OpenCode — all from a single harness.
- Multi-CLI orchestration — see and control agents across every major coding CLI
- Inter-agent messaging — agents talk to each other via Maildir inbox
- 5-tier hierarchy — orchestrator, leader, worker, thinker, reviewer
- 49 polymathic thinking agents — specialist cognitive architectures (Feynman, Carmack, Shannon, etc.)
- Headless spawning — ConPTY daemon for invisible background agents
- Deterministic naming — every agent gets a memorable two-word name from its UUID
- Team grouping — organize agents into teams with
--teamflag - Git-as-memory — worktree-per-mission isolation
# 1. Install the Python package
pip install liteharness
# 2. Install the plugin
/plugin install liteharness# Spawn a background agent
liteharness spawn --pty --model sonnet --name "Worker" --prompt "fix the flaky test"
# See who's online
liteharness discover
# Send a message
liteharness send <agent-id> "try approach B" --from <your-id>
# Check your inbox
liteharness check| Skill | Description |
|---|---|
/liteharness:liteharness |
Full orchestration — spawn, discover, message, control |
Specialist thinking agents that apply historical figures' cognitive architectures:
| Agent | Best For |
|---|---|
polymathic-feynman |
Debugging, first-principles analysis |
polymathic-carmack |
Performance, systems architecture |
polymathic-shannon |
API design, simplification |
polymathic-linus |
Code review, taste assessment |
polymathic-lovelace |
Cross-domain synthesis |
| ... and 44 more | See /agents for the full list |
- Python 3.10+
pip install liteharness- Windows (for headed mode / UIAutomation). Headless PTY works on any OS.
MIT