new players and category

[dz3ai]

github.com/RightNow-AI/openfang : Open-source Agent Operating System

[dz3ai]

https://github.com/Alex8791-cyber/cognithor : A local-first, autonomous agent operating system for AI experimentation and personal automation.

[dz3ai]

https://github.com/alchaincyf/darwin-skill

[dz3ai]

Research Comparison

Summary

These three projects represent two different categories:

Agent OS Projects: openfang, cognithor
Skill Optimization: darwin-skill (different category entirely)

1. openfang - Rust Agent OS

• Tech: Rust, 137K LOC, 14 crates, ~32MB single binary
• Key Differentiator: "Hands" - 7 pre-built autonomous agents (Clip, Lead, Collector, Predictor, Researcher, Twitter, Browser)
• Security: 16 defense layers (WASM sandbox, Merkle audit trail, SSRF protection, etc.)
• Channels: 40 adapters (most comprehensive)
• LLM Providers: 27
• License: MIT | v0.6.4 pre-1.0

2. cognithor - Python Agent OS

• Tech: Python 3.12+, 13,000+ tests, 89% coverage
• Key Differentiator: PGE-Trinity architecture (Planner → Gatekeeper → Executor), 6-tier cognitive memory
• Privacy: Local-first, GDPR compliant, zero telemetry
• Channels: 18 adapters
• LLM Providers: 19
• License: Apache 2.0 | v0.94.0 Beta

3. darwin-skill - ⚠️ NOT an Agent OS

• Category: Skill optimization system for Claude Code
• Purpose: Autonomously improves SKILL.md files (evaluate → improve → test → keep/revert)
• Inspired by: Andrej Karpathy's autoresearch
• Potential synergy: Could optimize skills used BY agent OS projects

Comparison Matrix

Aspect	openfang	cognithor	darwin-skill
Category	Agent OS	Agent OS	Skill Optimizer
Language	Rust	Python	N/A (meta)
Architecture	14 modular crates	PGE-Trinity	N/A
Autonomous Agents	7 "Hands"	Multi-agent	N/A
Memory System	SQLite + vector	6-tier cognitive	N/A
Security Layers	16	Gatekeeper + sandbox	N/A
Testing	1,767+ tests	13,000+ tests	N/A

Recommendations for awesome-agent-runtimes

1. openfang and cognithor should be added as Agent OS entries
2. darwin-skill belongs in a "Tooling" or "Meta" category - it's a tool for improving agent systems, not a runtime itself
3. Consider adding a new section: "Skill Optimization & Meta-Tools"