excalidraw-studio

Generate Excalidraw diagrams from natural language descriptions. Outputs .excalidraw JSON files openable in Excalidraw. Use when asked to "create a diagram", "make a flowchart", "visualize a process", "draw a system architecture", "create a mind map", "generate an Excalidraw file", "draw an ER diagram", "create a sequence diagram", or "make a class diagram". Supports flowcharts, relationship diagrams, mind maps, architecture, DFD, swimlane, class, sequence, and ER diagrams. Can use icon libraries (AWS, GCP, etc.) when set up. Do NOT use for code architecture analysis (use the architecture skills), Mermaid diagram rendering (use mermaid-studio), or non-visual documentation (use docs-writer).

Quality

—

Does it follow best practices?

Impact

—

No eval scenarios have been run

Securityby

Advisory

Suggest reviewing before use

Quality

Content

85%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A well-structured, highly actionable skill body with a clear workflow, validation checkpoint, and clean progressive disclosure into reference and asset files. Its only weakness is moderate redundancy, with several rules restated across Best Practices, Common Mistakes, and the Validation Checklist.

Suggestions

Consolidate the element-order, arrow-binding, and text-container rules into a single canonical section; have the Common Mistakes and Validation Checklist reference it instead of restating it, to reduce token cost.

The Common Mistakes list and Validation Checklist overlap heavily — consider merging them into one checklist that doubles as a verification gate before delivery.

Dimension	Reasoning	Score
Conciseness	The body is dense and assumes Claude's competence with no concept re-explanation, but it restates rules across multiple sections — element-order and arrow-binding rules appear in Step 4, Best Practices, Common Mistakes, and the Validation Checklist — so it could be tightened.	2 / 3
Actionability	Provides fully executable JSON snippets with exact field names (boundElements, containerId, startBinding), concrete coordinate/spacing rules, a color-hex table, and descriptive IDs — copy-paste ready rather than pseudocode.	3 / 3
Workflow Clarity	A clearly sequenced 5-step workflow (UNDERSTAND → CHOOSE TYPE → EXTRACT → GENERATE → SAVE) with a decision matrix, plus an explicit Validation Checklist before delivery and a Troubleshooting table for error recovery.	3 / 3
Progressive Disclosure	SKILL.md is an overview that points to one-level-deep, well-signaled references (excalidraw-schema.md, element-types.md, icon-libraries.md) and an assets/ template table; all referenced files were verified to exist.	3 / 3
	Total	11 / 12 Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, comprehensive description that clearly states capabilities, outputs, and concrete trigger phrases while actively disambiguating from neighboring skills. It uses appropriate third-person voice and avoids vague claims.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions and output types — 'Generate Excalidraw diagrams from natural language descriptions', 'Outputs .excalidraw JSON files', and nine diagram types plus icon libraries — rather than vague language.	3 / 3
Completeness	Explicitly answers both what ('Generate Excalidraw diagrams... Outputs .excalidraw JSON files') and when (an explicit 'Use when asked to...' clause with many triggers), with third-person voice throughout.	3 / 3
Trigger Term Quality	Includes natural user phrasings like 'create a diagram', 'make a flowchart', 'visualize a process', 'draw a system architecture', and 'create a sequence diagram', giving broad coverage of terms users would actually say.	3 / 3
Distinctiveness Conflict Risk	Clear Excalidraw-JSON niche with distinct triggers, plus explicit negative guidance ('Do NOT use for code architecture analysis... Mermaid diagram rendering... non-visual documentation') that sharply reduces conflict risk.	3 / 3
	Total	12 / 12 Passed

Validation

100%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: tech-leads-club/agent-skills
Commit: 9026164

Reviewed: 4 days ago

Table of Contents

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