Diagram Design
cathrynlavery/diagram-design
Creates branded diagrams, from architecture, flowchart and sequence to charts and maps, as self-contained HTML with inline SVG, with import from draw.io, Mermaid and Excalidraw.
Generate Sketch Lab architecture diagrams and open them via a share URL.
Install Sketch Lab
$ npx skills add webdevcody/sketchlab.app --skill sketch-lab -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install webdevcody/sketchlab.app sketch-lab --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/webdevcody/sketchlab.app.git skills-src && mkdir -p .claude/skills && cp -r skills-src/public/skills/sketch-lab .claude/skills/sketch-lab && 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 "sketch-lab" agent skill from https://github.com/webdevcody/sketchlab.app/tree/main/public/skills/sketch-lab into .claude/skills/sketch-lab/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sketch-lab", 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/webdevcody/sketchlab.app/tree/main/public/skills/sketch-labType 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 webdevcody/sketchlab.app --skill sketch-lab -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install webdevcody/sketchlab.app sketch-lab --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/webdevcody/sketchlab.app.git skills-src && mkdir -p .agents/skills && cp -r skills-src/public/skills/sketch-lab .agents/skills/sketch-lab && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "sketch-lab" agent skill from https://github.com/webdevcody/sketchlab.app/tree/main/public/skills/sketch-lab into .agents/skills/sketch-lab/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sketch-lab", 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 webdevcody/sketchlab.app --skill sketch-lab -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install webdevcody/sketchlab.app sketch-lab --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/webdevcody/sketchlab.app.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/public/skills/sketch-lab .cursor/skills/sketch-lab && 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 "sketch-lab" agent skill from https://github.com/webdevcody/sketchlab.app/tree/main/public/skills/sketch-lab into .cursor/skills/sketch-lab/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sketch-lab", 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/webdevcody/sketchlab.app.git --path public/skills/sketch-lab--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 webdevcody/sketchlab.app --skill sketch-lab -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install webdevcody/sketchlab.app sketch-lab --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/webdevcody/sketchlab.app.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/public/skills/sketch-lab .gemini/skills/sketch-lab && 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 "sketch-lab" agent skill from https://github.com/webdevcody/sketchlab.app/tree/main/public/skills/sketch-lab into .gemini/skills/sketch-lab/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sketch-lab", 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 webdevcody/sketchlab.app sketch-labInstalls 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 webdevcody/sketchlab.app --skill sketch-lab -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/webdevcody/sketchlab.app.git skills-src && mkdir -p .github/skills && cp -r skills-src/public/skills/sketch-lab .github/skills/sketch-lab && 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 "sketch-lab" agent skill from https://github.com/webdevcody/sketchlab.app/tree/main/public/skills/sketch-lab into .github/skills/sketch-lab/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sketch-lab", 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 webdevcody/sketchlab.app --skill sketch-lab -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install webdevcody/sketchlab.app sketch-lab --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/webdevcody/sketchlab.app.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/public/skills/sketch-lab .opencode/skills/sketch-lab && 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 "sketch-lab" agent skill from https://github.com/webdevcody/sketchlab.app/tree/main/public/skills/sketch-lab into .opencode/skills/sketch-lab/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "sketch-lab", 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
sketch-lab- GitHub stars
- 182
- Token cost
- ~1.4k tokens
- SKILL.md length
- 396 words
- Files
- 1
- Skills in repo
- 1
- Repo updated
- First seen
- Licence
- None found
At a glance
Generate Sketch Lab architecture diagrams and open them via a share URL.
- Works in 3 steps: Draft a GeneratedGraph that matches the… → Prefer 4–14 nodes unless the user asks… → Build and open
- The user asks for a Sketch Lab diagram
- SKILL.md covers Workflow, Schema, Icon keys and Examples, plus 2 more sections
- Calls curl and python3; reaches sketchlab.webdevcody.com
What it does
Sketch Lab is an agent skill from webdevcody/sketchlab.app. Generate Sketch Lab architecture diagrams and open them via a share URL. Use when the user asks for a Sketch Lab diagram, sketchlab.app board, 3D floor stack diagram, architecture sketch to open in Sketch Lab, or to emit GeneratedGraph JSON for Sketch Lab. Not for Mermaid, Excalidraw, or Mission Control diagram modals.
Its SKILL.md is about 1.4k 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. It works with Mermaid and Excalidraw.
When your agent uses it
- The user asks for a Sketch Lab diagram
- Sketchlab.app board
- 3D floor stack diagram
- Architecture sketch to open in Sketch Lab
Example prompts
- “/sketch-lab”
Requirements
- Python 3
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Draft a GeneratedGraph that matches the schema below.
- Prefer 4–14 nodes unless the user asks for more (hard cap 48 nodes / 96 edges / 48 floors).
- Build and open
What it can do on your machine
Read from SKILL.md and the folder at commit 8154cac. 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
Shell commands in SKILL.md call:
curlpython3
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
sketchlab.webdevcody.com
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
Sketch Lab loads about 1.4k tokens when it runs. Until then it costs about 83 tokens; SKILL.md has 396 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 396 words (~1,384 tokens).
“Produce a GeneratedGraph JSON object, then open it in Sketch Lab with a ?g= URL. Do not emit Mermaid, ASCII art, or markdown fences around the JSON when building the URL.”
- name
- sketch-lab
Files
Just SKILL.md in public/skills/sketch-lab of webdevcody/sketchlab.app.
Open the folder on GitHubat commit 8154cac
Compare with similar skills
Sketch Lab 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 |
|---|---|---|---|---|---|---|
| Sketch Lab this skillwebdevcody/sketchlab.app | 182 | — | ~1.4k | Automated safety check: Pass | None | |
| Diagram Designcathrynlavery/diagram-design | 44k | 1 repos | ~7.5k | Automated safety check: Pass | MIT | |
| Excalidraw Skillyctimlin/mcp_excalidraw | 2.5k | — | ~4.6k | Automated safety check: Pass | MIT | |
| Excalidraw Canvas Toolkitlingzhi227/agent-research-skills | 383 | — | ~3.8k | Automated safety check: Pass | None | |
| Excalidraw Diagram DesignBV-Venky/excalidraw-architect-mcp | 157 | — | ~1.6k | Automated safety check: Pass | MIT | |
| Diagram Makergarrytan/gstack | 136k | — | ~4.1k | Automated safety check: Notes | MIT |
Similar skills
Excalidraw Skill
yctimlin/mcp_excalidraw
Excalidraw canvas toolkit for creating, editing, and refining diagrams on a live canvas.
Excalidraw Canvas Toolkit
lingzhi227/agent-research-skills
Draws and refines Excalidraw diagrams on a live canvas through MCP tools or a REST API, with screenshots, file import and export, snapshots and Mermaid conversion.
Excalidraw Diagram Design
BV-Venky/excalidraw-architect-mcp
Guide for structuring graph input (nodes and edges) for the Excalidraw Architect MCP tool to produce clean, readable diagrams.
Diagram Maker
garrytan/gstack
Turns an English description or Mermaid source into a diagram set: the source, an editable .excalidraw file and rendered SVG and PNG images.
Docs Diagrams
mastra-ai/mastra
Convert existing docs diagram images to Mermaid, and author new Mermaid diagrams for Mastra docs.
Related
Works with
Categories
Questions about Sketch Lab
What does Sketch Lab do?
Generate Sketch Lab architecture diagrams and open them via a share URL. app. Generate Sketch Lab architecture diagrams and open them via a share URL.
When should I use Sketch Lab?
Sketch Lab fits situations like: the user asks for a Sketch Lab diagram; sketchlab.app board; 3D floor stack diagram; architecture sketch to open in Sketch Lab.
How do I install Sketch Lab in Claude Code?
Run `npx skills add webdevcody/sketchlab.app --skill sketch-lab -a claude-code`. Or copy the skill folder (public/skills/sketch-lab in webdevcody/sketchlab.app) into .claude/skills/sketch-lab in your project. Claude Code loads it when a task matches its description.
How do I install Sketch Lab in Codex?
Run `npx skills add webdevcody/sketchlab.app --skill sketch-lab -a codex`. Or copy the skill folder (public/skills/sketch-lab in webdevcody/sketchlab.app) into .agents/skills/sketch-lab in your project. Codex loads it when a task matches its description.
Can I use Sketch Lab 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 webdevcody/sketchlab.app --skill sketch-lab -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sketch-lab, .gemini/skills/sketch-lab, .github/skills/sketch-lab and .opencode/skills/sketch-lab in your project.
What does Sketch Lab need to run?
Going by SKILL.md and its folder, Sketch Lab needs the command-line tools its instructions call (curl and python3). Our summary lists: Python 3.
Does Sketch Lab access the network?
SKILL.md names 1 domain. In commands or code: sketchlab.webdevcody.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Sketch Lab 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 Sketch Lab use?
No licence was found for Sketch Lab or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Sketch Lab use?
About 1.4k tokens (SKILL.md is roughly 5.5k 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 Sketch Lab?
Skills that share tags, products or a category with Sketch Lab: Diagram Design (cathrynlavery/diagram-design, 44k stars), Excalidraw Skill (yctimlin/mcp_excalidraw, 2.5k stars), Excalidraw Canvas Toolkit (lingzhi227/agent-research-skills, 383 stars) and Excalidraw Diagram Design (BV-Venky/excalidraw-architect-mcp, 157 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Sketch Lab?
webdevcody (a GitHub user) maintains it in webdevcody/sketchlab.app, which has 182 GitHub stars. The repository was last updated on July 23, 2026.
Source: webdevcody/sketchlab.app on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.