s4
`s4` is a CLI tool helps AI coding agents by providing just enough context of the task at hands and specific instructions on what to do next. Here's interesting thing: The project uses s4 itself to developing s4 further. @s4.yaml is S4 documentation about S4 project itself.
Install / Use
npx skills add akngs/s4Installs into whichever agent you are using.
Cursor Rules
Cursor IDE rules (v2)
Quality Score
Category
Content & MediaSupported Platforms
Our assessment of s4
s4 scores 39/100 on our quality scale, 1172nd of 1,193 Content & Media skills we index.
Its Cursor Rules is 628 bytes long, written without headings and no code examples: fairly brief, so expect to fill in details yourself.
It has no GitHub stars yet, so there is no community track record; judge it on its content.
Maintenance, license and trust
- The repository was last updated about 10 months ago. That is recent enough to be usable, but agent tooling moves fast, so check the instructions against your agent's current version.
- Our last check on 2026-10-18 found the source still online.
- No license is declared. By default that means all rights are reserved: you can read it, but reusing or redistributing it is not clearly permitted. Ask the author before building on it commercially.
- Its trust signals score 74/100, with 3 cautions from licensing, adoption, age or documentation. These come from repository metadata, not a code audit — read the skill file before letting an agent act on it.
Safety scan
No issues foundOur scan of the whole file found no instruction hijacking, hidden characters, credential access, data exfiltration or destructive commands. An AI review of the same text found nothing harmful.
AI review by kimi-k2.7-code on 2026-09-24. Automated pattern scan on 2026-09-24. It catches known dangerous patterns, not every risk — read a skill before letting an agent act on it.
s4 compared with similar skills
All 4 of these similar skills score higher than s4; compare them before choosing.
| Skill | Score | Stars | Updated | Format |
|---|---|---|---|---|
| s4 (this skill)by akngs | 39 | 0 | 10mo ago | Cursor Rules |
| siyuanby siyuan-note | 100 | 46.9k | today | MCP Server |
| ccs-alignby thedotmack | 100 | 101.6k | 5d ago | SKILL.md |
| content-research-writerby ComposioHQ | 100 | 77.4k | 35d ago | SKILL.md |
| changelog-videoby heygen-com | 100 | 67.0k | 4d ago | SKILL.md |
Frequently asked questions
- How do I install s4?
- Run
npx skills add akngs/s4. The install tabs above show the steps for each supported agent. - Which AI agents does s4 work with?
- It is written for Cursor, as a Cursor Rules file. Other agents that read the same format can often use it too.
- Is s4 safe to use?
- Our scan of the whole file found no instruction hijacking, hidden characters, credential access, data exfiltration or destructive commands. An AI review of the same text found nothing harmful. It declares no license and scores 74/100 on trust signals. Skills are instructions an agent will follow, so read the file before installing it and do not approve commands you do not understand.
- Is s4 still maintained?
- The repository was last updated about 10 months ago. That is recent enough to be usable, but agent tooling moves fast, so check the instructions against your agent's current version.
Skill content
View source on GitHubalwaysApply: true
s4 is a CLI tool helps AI coding agents by providing just enough context of the task at hands and specific instructions on what to do next.
Here's interesting thing: The project uses s4 itself to developing s4 further. @s4.yaml is S4 documentation about S4 project itself. All the information you need to know about this project is in that file.
Always run s4 status to get the status of the project and the next action to take. This tool will give you the full context you need to know. Before stating you've completed the task, run s4 status again to make sure you've completed all the steps.
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Trust signals
From repository metadata: license, adoption, age and documentation. Not a code audit — see the Safety scan above for what the skill file itself contains.