Agent / tool directory

Agent harnesses

A curated index of agent harnesses for working with AI models. Each entry lists its GitHub stars (kept fresh by a daily sync), license, and install command, with a per-tool detail page covering model support and platforms. Closed-source tools are marked, not hidden.

Rails benchmark results

Ruby on Rails ran 8 frontier models against 21 real Rails tasks. See the leaderboard, cost-per-outcome curve, and model picks - then choose a harness that surfaces the right Rails APIs.

Tool Stars License Type
K Kimi Code
Moonshot's agentic coding CLI
 closed-source - closed
Z ZCode
Z.ai's official agentic IDE harness for GLM-5.2
 closed-source - closed
H Herdr
Persistent runtime that hosts real terminal sessions for coding agents
 46,068 Apache 2.0 open
R Roo Code
AI agents in your editor (archived May 2026; community forked as ZooCode)
 24,259 Apache-2.0 open
C Continue
Pioneering open-source coding agent (final 2.0 release; repo read-only)
 36,341 Apache-2.0 open
C Cline
Autonomous coding agent as an SDK, IDE extension, or CLI
 70,908 Apache-2.0 open
P Pi
Minimal, extensible terminal coding agent harness
 118,091 MIT open
C Codex
Lightweight coding agent that runs in your terminal or as a native Linux app
 131,071 Apache-2.0 open
C Claude Code
Anthropic's agentic coding CLI
 closed-source - closed
K Kilo Code
Open-source agentic engineering platform for IDE, CLI, and cloud
 27,764 MIT open
O OpenCode
AI coding agent for the terminal, desktop, and IDE
 222,065 MIT open
A Aider
AI pair programming in the terminal
 49,769 Apache-2.0 open