A tool for making Excalidraw diagrams with a consistent brand style. Excalidraw is a visual drawing format often used for sketches, plans, and project documentation.

Use it to create branded diagrams for project documentation.

It helps project diagrams match a company’s visual identity instead of looking unrelated to the rest of the documentation.

excalidraw — Skill for Claude Code by saajunaid/caddis-plugin

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add saajunaid/caddis-plugin --skill excalidraw

Clone the repo

git clone --depth 1 https://github.com/saajunaid/caddis-plugin

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/saajunaid/caddis-plugin/excalidraw/github.svg)](https://agentmods.dev/skills/saajunaid/caddis-plugin/excalidraw)

Your own site

<a href="https://agentmods.dev/skills/saajunaid/caddis-plugin/excalidraw"><img src="https://agentmods.dev/badge/skills/saajunaid/caddis-plugin/excalidraw/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/saajunaid/caddis-plugin/excalidraw"><img src="https://agentmods.dev/badge/skills/saajunaid/caddis-plugin/excalidraw.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,172 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00015	$0.02172
Opus 5.5	$0.00006	$0.00869
Sonnet 5.5	$0.00003	$0.00434
Haiku 4.5	$0.00002	$0.00217

Measured 1mo ago against content hash cb4cb1246f04, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

excalidraw scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/add-arrow.py, scripts/add-icon-to-diagram.py, scripts/split-excalidraw-library.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.github/skills/media/excalidraw/SKILL.md · 194 lines

How it starts

The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Excalidraw Diagram Generation

Generate .excalidraw JSON files for architecture, flowcharts, and whiteboard-style diagrams using consistent brand theming.

Project Context — Read project-config.md in the repo root for brand tokens, color palette, and project metadata.

Use these colors for diagrams that appear in project docs, runbooks, or architecture artifacts.

When to Use

Creating architecture or system design diagrams for systems
Drawing flowcharts or decision trees for internal processes
Building mind maps or relationship diagrams with brand theming
Producing whiteboard visuals for project documentation

Supported Diagram Types

Type	Use Case
Flowchart	Processes, decision trees
Architecture	System components, microservices
Mind Map	Concept hierarchies, brainstorming
Relationship	Entity relationships, data models
Sequence	Message flows, interactions

Phase 1: Plan Layout

Spacing

Context	Pixels
Horizontal gap	200-300
Vertical gap	100-150
Canvas margin	50+
Arrow clearance	20-30

Brand Color Palette

Role	Hex	Use
Primary entity	`#E10A0A`	Primary Red — main components, CTAs
Process step	`#ECFDF5`	Light green fill (border #10B981)
Key / central	`#FEF3C7`	Light yellow (border #F59E0B)
Warning / error	`#FFF7ED`	Light orange (border #F97316)
Background	`#F8F9FA`	Light background
Default stroke	`#1F2937`	Navy

Keep total elements under 20 per diagram. Split larger systems.

Phase 2: JSON Structure

Same as standard Excalidraw: type, version, source, elements, appState, files. Use brand palette hex values in backgroundColor and strokeColor.

Read the full file on GitHub · 194 lines

Files

What ships with it

16 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 194 lines · 15 tokens per session scan A cb4cb1246f04

Subscribe to this mod's changes

excalidraw is a skill published in the GitHub repository saajunaid/caddis-plugin (0 stars, last pushed 2d ago), licensed MIT. It adds 15 tokens to every session and 2,172 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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