head to head · open source
mantis vs claude-code-skills
mantis has 2,704 GitHub stars, 224 forks, 1 open issues and last shipped 2 days ago. claude-code-skills has 587 stars, 88 forks, 0 open issues and last shipped 10 days ago. mantis leads on adoption by 361% (2,704 vs 587 stars). mantis is written in Python under Apache-2.0; claude-code-skills is written in Shell under MIT. mantis has attracted 8% as many forks as stars, claude-code-skills 15%. mantis was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-agents, code-review), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| mantis | claude-code-skills | |
|---|---|---|
| GitHub stars | ★ 2.7K | ★ 587 |
| License | Apache-2.0 | MIT |
| Written in | Python | Shell |
| Last push | 2026-11-03 | 2026-10-26 |
| Forks | ⑂ 224 | ⑂ 88 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick mantis if
- You weight community size — 2.7K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick claude-code-skills if
- You want the claude-code-skills feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Shell
- You evaluated both and claude-code-skills fits your workflow better
About mantis
Mantis: Portable Toolkit for Building Secure Software [!CAUTION] USE AT YOUR OWN RISK. BE EXTREMELY CAREFUL. This suite is designed to generate and execute autonomously generated code that may be unstable or perform unexpected actions. USE THIS ONLY IN ISOLATED, RESTRICTED ENVIRONMENTS. Never run this suite on a machine with access to production systems, sensitive data, or internal networks. [!IMPORTANT] RESPONSIBLE USE AI models are non deterministic and can hallucinate findings or generate incorrect patches. All findings must be manually verified by a security expert before being reported. Do not mass file…
read the full mantis overview →
About claude-code-skills
Claude Codex Skills Give your AI agent a clear finish line. You ask for a fix and get a new abstraction. A review lists generic advice. The agent says “done,” but you still have to work out what it checked. These skills give Claude Code and Codex a concrete way to finish the task: establish the intended outcome, work within scope, verify the result, and make remaining gaps explicit. Choose the skill for the problem in front of you. Project page · Install · Full catalog What changes in your workflow A clearer target. Turn an idea, bug report, or incident into an outcome the agent can check. Focused work. Reuse…
read the full claude-code-skills overview →
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Frequently asked questions
Is mantis or claude-code-skills more popular?
mantis has 2,704 GitHub stars and claude-code-skills has 587. mantis has the larger community by that measure.
Are mantis and claude-code-skills free?
Both are open source. mantis is licensed under Apache-2.0 and claude-code-skills under MIT. Neither carries a licence fee.
What is the difference between mantis and claude-code-skills?
mantis is written in Python and claude-code-skills in Shell. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, mantis or claude-code-skills?
Choose mantis if you want the larger community (2,704 stars) or its Apache-2.0 licence terms. Choose claude-code-skills if its feature set, stack or MIT licence fits better. Both are self-hostable.