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mermaid-studio

Expert Mermaid diagram creation, validation, and rendering with dual-engine output (SVG/PNG/ASCII). Supports all 20+ diagram types including C4 architecture, AWS architecture-beta with service icons, flowcharts, sequence, ERD, state, class, mindmap, timeline, git graph, sankey, and more. Features code-to-diagram analysis, batch rendering, 15+ themes, and syntax validation. Use when users ask to create diagrams, visualize architecture, render mermaid files, generate ASCII diagrams, document system flows, model databases, draw AWS infrastructure, analyze code structure, or anything involving "mermaid", "diagram", "flowchart", "architecture diagram", "sequence diagram", "ERD", "C4", "ASCII diagram". Do NOT use for non-Mermaid image generation, data plotting with chart libraries, or general documentation writing.

75

Quality

92%

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SKILL.md
Quality
Evals
Security

Quality

Content

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

The body is highly actionable with a clear validated workflow and excellent progressive disclosure to real reference files. Its main weakness is conciseness — the init palette and styling guidance are restated, and there is mild motivational padding that does not add instruction.

Suggestions

De-duplicate the full %%{init} themeVariables block: show it once in Golden Rule 1 and have the flowchart example reference it or use a shortened snippet rather than repeating all ~16 color keys verbatim.

Trim motivational framing (e.g. "They are not optional — they define the difference between a mediocre diagram and a gold-standard one") and merge overlapping styling guidance between the Golden Rules and the dedicated C4 Styling section to reduce repetition.

Consider moving the full Available Themes list (all 15+5 theme names) into references/themes.md and keeping only a brief pointer plus the most-used defaults inline.

DimensionReasoningScore

Conciseness

Mostly efficient but padded in places: the full init-directive color palette is repeated verbatim (Golden Rule 1 and the flowchart example), the "Golden Rules" section restates styling advice later reinforced by dedicated C4 and references sections, and minor cheerleading like "They are not optional — they define the difference between a mediocre diagram and a gold-standard one." could be trimmed.

3 / 5

Actionability

Fully executable guidance throughout: copy-paste Mermaid examples for flowchart/C4/architecture, concrete render commands with flags (e.g. `node scripts/render.mjs -i diagram.mmd -o diagram.svg --icons logos`), batch invocation with `--workers 4`, and a troubleshooting table mapping symptoms to fixes.

5 / 5

Workflow Clarity

Clear five-step sequence (Understand → Create → Validate → Render → Code-to-Diagram) with an explicit validation checkpoint and feedback loop: validate, read troubleshooting on failure, fix and re-validate, max 3 attempts before asking the user. The modes table also clarifies Create/Render/Full branching.

5 / 5

Progressive Disclosure

Overview body is well-organized into modes and steps, with one-level-deep references clearly signaled and load-conditionally: c4-architecture.md, aws-architecture.md, code-to-diagram.md, themes.md, troubleshooting.md, and diagram-types.md — all verified to exist in ./references/. Navigation is explicit via a "When to Load References" list and inline "read references/..." pointers.

5 / 5

Total

18

/

20

Passed

Description

100%Weight 40%Scale 1-5

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

The description is specific, trigger-rich, and explicitly answers both what and when, plus includes an exclusion clause that sharply bounds its scope. It is a strong, low-conflict description with no padding.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — "Mermaid diagram creation, validation, and rendering", "code-to-diagram analysis", "batch rendering", "syntax validation" — with specific output formats (SVG/PNG/ASCII) and named diagram types, giving comprehensive coverage.

5 / 5

Completeness

Explicitly answers both what ("Expert Mermaid diagram creation, validation, and rendering with dual-engine output") and when ("Use when users ask to create diagrams..."), with concrete trigger phrases and a "Do NOT use for..." exclusion clause.

5 / 5

Trigger Term Quality

Comprehensive natural-term coverage including synonyms and trigger phrases users would say: "diagram", "flowchart", "architecture diagram", "sequence diagram", "ERD", "C4", "ASCII diagram", plus the literal keyword "mermaid".

5 / 5

Distinctiveness Conflict Risk

Occupies a clear Mermaid-diagram niche with distinct triggers and an explicit negative-scope clause ("Do NOT use for non-Mermaid image generation, data plotting... or general documentation writing"), minimizing conflict with adjacent skills.

5 / 5

Total

20

/

20

Passed

Validation

100%

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

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
tech-leads-club/agent-skills
Reviewed

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