Agent skill

Excalidraw

by HybridAIOne in HybridAIOne/hybridclaw

Create and revise editable .excalidraw diagrams as Excalidraw JSON for architecture diagrams, flowcharts, sequence diagrams, concept maps, and other hand-drawn explainers.

MITAuto-check passedDevelopment

Install Excalidraw

skills CLI

$ npx skills add HybridAIOne/hybridclaw --skill excalidraw -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install HybridAIOne/hybridclaw excalidraw --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/HybridAIOne/hybridclaw.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/excalidraw .claude/skills/excalidraw && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "excalidraw" agent skill from https://github.com/HybridAIOne/hybridclaw/tree/main/skills/excalidraw into .claude/skills/excalidraw/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw", 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

$skill-installer install https://github.com/HybridAIOne/hybridclaw/tree/main/skills/excalidraw

Type 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.

skills CLI

$ npx skills add HybridAIOne/hybridclaw --skill excalidraw -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install HybridAIOne/hybridclaw excalidraw --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HybridAIOne/hybridclaw.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/excalidraw .agents/skills/excalidraw && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "excalidraw" agent skill from https://github.com/HybridAIOne/hybridclaw/tree/main/skills/excalidraw into .agents/skills/excalidraw/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw", 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.

skills CLI

$ npx skills add HybridAIOne/hybridclaw --skill excalidraw -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install HybridAIOne/hybridclaw excalidraw --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HybridAIOne/hybridclaw.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/excalidraw .cursor/skills/excalidraw && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "excalidraw" agent skill from https://github.com/HybridAIOne/hybridclaw/tree/main/skills/excalidraw into .cursor/skills/excalidraw/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw", 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

$ gemini skills install https://github.com/HybridAIOne/hybridclaw.git --path skills/excalidraw

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add HybridAIOne/hybridclaw --skill excalidraw -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install HybridAIOne/hybridclaw excalidraw --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HybridAIOne/hybridclaw.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/excalidraw .gemini/skills/excalidraw && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "excalidraw" agent skill from https://github.com/HybridAIOne/hybridclaw/tree/main/skills/excalidraw into .gemini/skills/excalidraw/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw", 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.

GitHub CLI

$ gh skill install HybridAIOne/hybridclaw excalidraw

Installs 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).

skills CLI

$ npx skills add HybridAIOne/hybridclaw --skill excalidraw -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/HybridAIOne/hybridclaw.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/excalidraw .github/skills/excalidraw && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "excalidraw" agent skill from https://github.com/HybridAIOne/hybridclaw/tree/main/skills/excalidraw into .github/skills/excalidraw/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw", 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.

skills CLI

$ npx skills add HybridAIOne/hybridclaw --skill excalidraw -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install HybridAIOne/hybridclaw excalidraw --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HybridAIOne/hybridclaw.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/excalidraw .opencode/skills/excalidraw && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "excalidraw" agent skill from https://github.com/HybridAIOne/hybridclaw/tree/main/skills/excalidraw into .opencode/skills/excalidraw/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "excalidraw", 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: excalidraw
GitHub stars: 159
Token cost: ~1.2k tokens
SKILL.md length: 406 words
Files: 6 (incl. scripts, references)
Skills in repo: 72
Repo updated: Oct 9, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Create and revise editable .excalidraw diagrams as Excalidraw JSON for architecture diagrams, flowcharts, sequence diagrams, concept maps, and other hand-drawn explainers.

Works in 5 steps: Plan the diagram before writing JSON:… → Write a valid Excalidraw elements array. → Wrap the array in the standard file… → …
Tasks that involve Diagrams
SKILL.md covers Default Workflow, File Envelope, Rules and Core Patterns, plus 2 more sections
Runs JavaScript scripts from its folder; calls node

What it does

Excalidraw is an agent skill from HybridAIOne/hybridclaw. Create and revise editable .excalidraw diagrams as Excalidraw JSON for architecture diagrams, flowcharts, sequence diagrams, concept maps, and other hand-drawn explainers.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including scripts and reference files (for example `agents/openai.yaml`, `references/colors.md` and `references/dark-mode.md`).

It sits in Development, covering Diagrams. It works with Excalidraw. The repository describes itself as: Enterprise-ready self-hosted AI assistant runtime with sandboxed execution, secure credentials, approvals, and memory. The licence is MIT.

When your agent uses it

Tasks that involve Diagrams

Example prompts

“/excalidraw”

Requirements

Node.js

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

Plan the diagram before writing JSON: title, nodes, connectors, groups, and rough canvas size.
Write a valid Excalidraw elements array.
Wrap the array in the standard file envelope.
Save the result as *.excalidraw.
If the user wants a shareable browser link, run

What it can do on your machine

Read from SKILL.md and the folder at commit 8162701. 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
Ships 1 file in scripts/ (JavaScript), which the agent can run.
Shell commands in SKILL.md call:
- node
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- excalidraw.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

Excalidraw loads about 1.2k tokens when it runs, and up to ~3.2k if it reads all its reference files. Until then it costs about 46 tokens; SKILL.md has 406 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~46
When it runs · the whole SKILL.md, loaded when a task matches: ~1.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~3.2k

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); the scripts in this folder are not scanned.

SKILL.md

The full file from HybridAIOne/hybridclaw at commit 8162701, republished under its MIT licence (© HybridAIOne). 406 words, ~1,151 tokens.

Download SKILL.mdSave it as .claude/skills/excalidraw/SKILL.md (or your agent's skills folder). This skill also uses 5 other files; get the full folder from GitHub.

name: excalidraw
description: Create and revise editable `.excalidraw` diagrams as Excalidraw JSON for architecture diagrams, flowcharts, sequence diagrams, concept maps, and other hand-drawn explainers.
user-invocable: true
disable-model-invocation: false

Excalidraw

Use this skill when the user wants an editable diagram, not just a rendered image.

Typical requests:

architecture or system diagrams
flowcharts and process maps
sequence diagrams
concept maps and explainers
hand-drawn style visuals that should stay editable in Excalidraw

Excalidraw files are plain JSON. The default deliverable is a *.excalidraw file in the workspace. The user can drag that file into excalidraw.com to view, edit, or export it.

Default Workflow

Plan the diagram before writing JSON: title, nodes, connectors, groups, and rough canvas size.
Write a valid Excalidraw elements array.
Wrap the array in the standard file envelope.
Save the result as *.excalidraw.
If the user wants a shareable browser link, run:

bash

node skills/excalidraw/scripts/upload.mjs diagram.excalidraw

The upload helper encrypts the diagram client-side and prints the Excalidraw share URL.

File Envelope

Use this shape unless you are editing an existing file and need to preserve more fields:

json

{
  "type": "excalidraw",
  "version": 2,
  "source": "hybridclaw",
  "elements": [],
  "appState": {
    "viewBackgroundColor": "#ffffff"
  },
  "files": {}
}

When editing an existing .excalidraw file, preserve appState, files, and any other existing top-level keys unless the user asked for a deliberate reset.

Rules

Use Excalidraw JSON, not SVG or HTML, unless the user explicitly asked for another format.
For labeled shapes or arrows, create a separate text element and bind it with containerId plus the container's boundElements.
Do not invent a "label" property on rectangles, diamonds, ellipses, or arrows. Excalidraw ignores it.
Place a bound text element immediately after its container in the elements array.
Use readable sizes: fontSize 16+ for normal labels, 20+ for titles, and at least 120x60 for labeled boxes.
Leave about 20-30px of space between major elements.
Prefer short stable ids such as api, text-api, arrow-api-db.
Avoid emoji and decorative Unicode. Stick to plain text that Excalidraw renders reliably.
Default to a white background with dark text unless the user explicitly asks for dark mode.
For arrows, points are offsets relative to the arrow's x and y.

Show full SKILL.md (94 more words)Show less

Core Patterns

Labeled Rectangle

json

[
  {
    "type": "rectangle",
    "id": "api",
    "x": 120,
    "y": 120,
    "width": 220,
    "height": 80,
    "roundness": { "type": 3 },
    "backgroundColor": "#a5d8ff",
    "fillStyle": "solid",
    "boundElements": [{ "id": "text-api", "type": "text" }]
  },
  {
    "type": "text",
    "id": "text-api",
    "x": 130,
    "y": 145,
    "width": 200,
    "height": 24,
    "text": "API Service",
    "fontSize": 20,
    "fontFamily": 1,
    "strokeColor": "#1e1e1e",
    "textAlign": "center",
    "verticalAlign": "middle",
    "containerId": "api",
    "originalText": "API Service",
    "autoResize": true
  }
]

Arrow Between Shapes

json

{
  "type": "arrow",
  "id": "arrow-api-db",
  "x": 340,
  "y": 160,
  "width": 180,
  "height": 0,
  "points": [[0, 0], [180, 0]],
  "endArrowhead": "arrow",
  "startBinding": { "elementId": "api", "fixedPoint": [1, 0.5] },
  "endBinding": { "elementId": "db", "fixedPoint": [0, 0.5] }
}

Reference Files

For palette and contrast guidance, read references/colors.md.
For copy-pasteable diagram patterns, read references/examples.md.
For dark-background diagrams, read references/dark-mode.md.

Anti-Patterns

Do not cram many tiny nodes into one canvas when two simpler diagrams would read better.
Do not put all shapes first and all text last; that usually breaks layering and bindings.
Do not guess at Excalidraw-only properties you have not already seen in a working example.
Do not replace an editable diagram request with a static PNG export unless the user asked for the export.

Files

SKILL.md and 5 other files (scripts, references) in skills/excalidraw of HybridAIOne/hybridclaw.

SKILL.md
agents/openai.yaml
references/colors.md
references/dark-mode.md
references/examples.md
scripts/upload.mjs

Open the folder on GitHubat commit 8162701

Compare with similar skills

Excalidraw 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.

Excalidraw compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Excalidraw this skillHybridAIOne/hybridclaw	159	—	~1.2k	Automated safety check: Pass	MIT	yesterday
Diagram Designcathrynlavery/diagram-design	48k	1 repos	~7.6k	Automated safety check: Pass	MIT	yesterday
Excalidraw Diagramcoleam00/excalidraw-diagram-skill	5k	2 repos	~6.1k	Automated safety check: Pass	None	7 mo ago
Excalidraw Diagrambreferrari/obsidian-mind	5k	—	~3.9k	Automated safety check: Pass	MIT	4 days ago
Excalidraw Skillyctimlin/mcp_excalidraw	2.5k	—	~4.6k	Automated safety check: Pass	MIT	yesterday
Lanshu Animated Architecture Diagramcclank/lanshu-animated-architecture-diagram	995	—	~1.1k	Automated safety check: Pass	MIT	1 mo ago

Similar skills

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.
48k GitHub starsUsed in 1 repo~7.6k tokens
DevelopmentAuto-check passed
Excalidraw Diagram
coleam00/excalidraw-diagram-skill
Create Excalidraw diagram JSON files that make visual arguments.
5k GitHub starsUsed in 2 repos~6.1k tokens
DevelopmentAuto-check passed
Excalidraw Diagram
breferrari/obsidian-mind
Generate Excalidraw diagrams from text content. An agent skill from breferrari/obsidian-mind.
5k GitHub stars~3.9k tokensUpdated 4 days ago
DevelopmentAuto-check passed
Excalidraw Skill
yctimlin/mcp_excalidraw
Excalidraw canvas toolkit for creating, editing, and refining diagrams on a live canvas.
2.5k GitHub stars~4.6k tokensUpdated yesterday
DevelopmentAuto-check passed
Lanshu Animated Architecture Diagram
cclank/lanshu-animated-architecture-diagram
Create premium hand-drawn architecture and process diagrams in the Lanshu animated GIF style, with editable .excalidraw files, static PNG previews, and genuinely animated GIFs with moving flow…
995 GitHub stars~1.1k tokensUpdated 1 mo ago
DevelopmentAuto-check passed
Excalidraw Diagram Studio
tech-leads-club/agent-skills
Generates Excalidraw diagram files from plain descriptions, choosing among flowcharts, mind maps, architecture, swimlane, class, sequence and ER diagrams.
7k GitHub stars~3.6k tokensUpdated yesterday
DevelopmentAuto-check passed

Questions about Excalidraw

What does Excalidraw do?

Create and revise editable .excalidraw diagrams as Excalidraw JSON for architecture diagrams, flowcharts, sequence diagrams, concept maps, and other hand-drawn explainers. Excalidraw is an agent skill from HybridAIOne/hybridclaw.excalidraw diagrams as Excalidraw JSON for architecture diagrams, flowcharts, sequence diagrams, concept maps, and other hand-drawn explainers.

When should I use Excalidraw?

Excalidraw fits situations like: tasks that involve Diagrams.

How do I install Excalidraw in Claude Code?

Run `npx skills add HybridAIOne/hybridclaw --skill excalidraw -a claude-code`. Or copy the skill folder (skills/excalidraw in HybridAIOne/hybridclaw) into .claude/skills/excalidraw in your project. Claude Code loads it when a task matches its description.

How do I install Excalidraw in Codex?

Run `npx skills add HybridAIOne/hybridclaw --skill excalidraw -a codex`. Or copy the skill folder (skills/excalidraw in HybridAIOne/hybridclaw) into .agents/skills/excalidraw in your project. Codex loads it when a task matches its description.

Can I use Excalidraw 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 HybridAIOne/hybridclaw --skill excalidraw -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/excalidraw, .gemini/skills/excalidraw, .github/skills/excalidraw and .opencode/skills/excalidraw in your project.

What does Excalidraw need to run?

Going by SKILL.md and its folder, Excalidraw needs JavaScript for the scripts in its folder and the command-line tools its instructions call (node). Our summary lists: Node.js.

Does Excalidraw access the network?

SKILL.md names 1 domain. As links in the text: excalidraw.com. This is read from the text; nothing was executed.

Is Excalidraw 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Excalidraw use?

Excalidraw 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 Excalidraw use?

About 1.2k tokens (SKILL.md is roughly 4.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.1k tokens, read only when the agent opens those files.

What are the alternatives to Excalidraw?

Skills that share tags, products or a category with Excalidraw: Diagram Design (cathrynlavery/diagram-design, 48k stars), Excalidraw Diagram (coleam00/excalidraw-diagram-skill, 5k stars), Excalidraw Diagram (breferrari/obsidian-mind, 5k stars) and Excalidraw Skill (yctimlin/mcp_excalidraw, 2.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Excalidraw?

HybridAIOne (a GitHub organization) maintains it in HybridAIOne/hybridclaw, which has 159 GitHub stars. The repository holds 72 skills in this directory. The repository was last updated on October 9, 2026.

Source: HybridAIOne/hybridclaw on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Excalidraw

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Excalidraw

Default Workflow

File Envelope

Rules

Core Patterns

Labeled Rectangle

Arrow Between Shapes

Reference Files

Anti-Patterns

Files

Compare with similar skills

Similar skills

More from HybridAIOne/hybridclaw

Related

Questions about Excalidraw