Mobius Architecture Draw
mobius-system/mobius
Analyze a Mobius project repository and generate a single-file HTML/SVG architecture diagram at .imac/generatedfigures/arch.html, with optional image fallbacks.
What Is This — explain anything as a picture-first HTML page.
Install Whatis
$ npx skills add suyuan2022/suyuan-skill --skill whatis -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install suyuan2022/suyuan-skill whatis --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/suyuan2022/suyuan-skill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/whatis .claude/skills/whatis && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "whatis" agent skill from https://github.com/suyuan2022/suyuan-skill/tree/main/whatis into .claude/skills/whatis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "whatis", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/suyuan2022/suyuan-skill/tree/main/whatisType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add suyuan2022/suyuan-skill --skill whatis -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install suyuan2022/suyuan-skill whatis --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/suyuan2022/suyuan-skill.git skills-src && mkdir -p .agents/skills && cp -r skills-src/whatis .agents/skills/whatis && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "whatis" agent skill from https://github.com/suyuan2022/suyuan-skill/tree/main/whatis into .agents/skills/whatis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "whatis", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add suyuan2022/suyuan-skill --skill whatis -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install suyuan2022/suyuan-skill whatis --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/suyuan2022/suyuan-skill.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/whatis .cursor/skills/whatis && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "whatis" agent skill from https://github.com/suyuan2022/suyuan-skill/tree/main/whatis into .cursor/skills/whatis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "whatis", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/suyuan2022/suyuan-skill.git --path whatis--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add suyuan2022/suyuan-skill --skill whatis -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install suyuan2022/suyuan-skill whatis --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/suyuan2022/suyuan-skill.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/whatis .gemini/skills/whatis && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "whatis" agent skill from https://github.com/suyuan2022/suyuan-skill/tree/main/whatis into .gemini/skills/whatis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "whatis", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install suyuan2022/suyuan-skill whatisInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add suyuan2022/suyuan-skill --skill whatis -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/suyuan2022/suyuan-skill.git skills-src && mkdir -p .github/skills && cp -r skills-src/whatis .github/skills/whatis && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "whatis" agent skill from https://github.com/suyuan2022/suyuan-skill/tree/main/whatis into .github/skills/whatis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "whatis", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add suyuan2022/suyuan-skill --skill whatis -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install suyuan2022/suyuan-skill whatis --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/suyuan2022/suyuan-skill.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/whatis .opencode/skills/whatis && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "whatis" agent skill from https://github.com/suyuan2022/suyuan-skill/tree/main/whatis into .opencode/skills/whatis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "whatis", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
whatis- GitHub stars
- 308
- Token cost
- ~606 tokens
- SKILL.md length
- 353 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
What Is This — explain anything as a picture-first HTML page.
- The user types /whatis <topic
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Asks what something is / how it works and would be better served by big diagrams than by paragraphs
What it does
Whatis is an agent skill from suyuan2022/suyuan-skill. What Is This — explain anything as a picture-first HTML page. Use when the user types /whatis <topic, or asks what something is / how it works and would be better served by big diagrams than by paragraphs.
Its SKILL.md is about 610 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Diagrams and HTML artifacts. The repository describes itself as: Claude Code Skills by Suyuan — AI-native productivity tools for real practitioners. The licence is MIT.
When your agent uses it
- The user types /whatis <topic
- Asks what something is / how it works and would be better served by big diagrams than by paragraphs
Example prompts
- “/whatis”
What it can do on your machine
Read from SKILL.md and the folder at commit 423473d. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Whatis loads about 606 tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 353 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from suyuan2022/suyuan-skill at commit 423473d, republished under its MIT licence (© suyuan2022). 353 words, ~606 tokens.
Download SKILL.mdSave it as
.claude/skills/whatis/SKILL.md (or your agent's skills folder).- name
- whatis
- description
- What Is This — explain anything as a picture-first HTML page. Use when the user types /whatis <topic>, or asks what something is / how it works and would be better served by big diagrams than by paragraphs.
whatis
Explain like I'm someone who knows nothing about this topic, using an HTML page with big pictures and few words.
No Artifact tool in this environment: write a self-contained HTML file (inline SVG/CSS, no external deps) to a temp directory (e.g. $TMPDIR or /tmp), then open it.
If the current context is not enough to explain the topic, gather enough context yourself before drawing. Every node in a diagram must be backed by evidence; never fabricate.
Draw real diagrams in SVG, freely picking and combining whatever fits: flowchart, sequence diagram, state diagram, architecture/block diagram, C4, dependency graph, call graph, ER diagram, class diagram, DFD, swimlane, deployment diagram, timeline, Gantt, git graph, before/after comparison, bar/line chart, treemap, heatmap... If none fits, design your own — expression comes before templates. Tables are for enumerations only and don't count as diagrams.
A diagram exists to make structure visible: who talks to whom, what causes what, what changes when. Draw each one in the shape the reader's eye already knows — boxes for parts, arrows for actions, lanes for actors, time flowing one way. Make each diagram read at two distances: at a glance only the backbone shows — a name per box, a verb per arrow, one path the eye can follow; the detail lives in a quieter layer of smaller, dimmer annotations that never competes with the backbone. Color like a print magazine: warm paper background, ink for text and lines, one muted accent doing all the pointing; status reads from marks and line weight, tinted from the same palette. One diagram, one point: when the content outgrows the shape, split it or summarize the tail — shrinking the type is never the answer. The test: someone who reads only the diagrams and captions still gets the whole story.
Show full SKILL.md (59 more words)Show less
Give the page a wide content column with visible margins on both sides: diagrams span the column (each SVG gets a viewBox and width:100% so it scales with the window), prose sits in a narrower measure within it.
Match the user's language in the explanation. Keep technical terms, API names, CLI commands, and exact error strings verbatim in English.
© suyuan2022, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in whatis of suyuan2022/suyuan-skill.
Open the folder on GitHubat commit 423473d
Compare with similar skills
Whatis next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Whatis this skillsuyuan2022/suyuan-skill | 308 | — | ~606 | Automated safety check: Pass | MIT | |
| Mobius Architecture Drawmobius-system/mobius | 138 | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| ArchifyNousResearch/hermes-agent | 252k | — | ~612 | Automated safety check: Pass | MIT | |
| Architecture DiagramCoWork-OS/CoWork-OS | 477 | — | ~1k | Automated safety check: Pass | MIT | |
| Archify Diagram BuilderUnclecheng-li/AI_Animation | 1.5k | 2 repos | ~4.1k | Automated safety check: Pass | MIT | |
| Archify Diagramstt-a1i/archify | 81k | — | ~2.9k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Whatis
What does Whatis do?
What Is This — explain anything as a picture-first HTML page. Whatis is an agent skill from suyuan2022/suyuan-skill. What Is This — explain anything as a picture-first HTML page.
When should I use Whatis?
Whatis fits situations like: the user types /whatis <topic; asks what something is / how it works and would be better served by big diagrams than by paragraphs.
How do I install Whatis in Claude Code?
Run `npx skills add suyuan2022/suyuan-skill --skill whatis -a claude-code`. Or copy the skill folder (whatis in suyuan2022/suyuan-skill) into .claude/skills/whatis in your project. Claude Code loads it when a task matches its description.
How do I install Whatis in Codex?
Run `npx skills add suyuan2022/suyuan-skill --skill whatis -a codex`. Or copy the skill folder (whatis in suyuan2022/suyuan-skill) into .agents/skills/whatis in your project. Codex loads it when a task matches its description.
Can I use Whatis in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add suyuan2022/suyuan-skill --skill whatis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/whatis, .gemini/skills/whatis, .github/skills/whatis and .opencode/skills/whatis in your project.
What does Whatis need to run?
SKILL.md names no scripts, command-line tools or credentials: Whatis is instructions for the agent only.
Does Whatis access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Whatis safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Whatis use?
Whatis is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Whatis use?
About 606 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Whatis?
Skills that share tags, products or a category with Whatis: Mobius Architecture Draw (mobius-system/mobius, 138 stars), Archify (NousResearch/hermes-agent, 252k stars), Architecture Diagram (CoWork-OS/CoWork-OS, 477 stars) and Archify Diagram Builder (Unclecheng-li/AI_Animation, 1.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Whatis?
suyuan2022 (a GitHub user) maintains it in suyuan2022/suyuan-skill, which has 308 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on August 24, 2026.
Source: suyuan2022/suyuan-skill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.