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Mermaid Expert · dokhacgiakhoa | DecimalAI

documentationby dokhacgiakhoa

Mermaid Expert

dokhacgiakhoa/mermaid-expert

Source dokhacgiakhoa/agent-skills-4-vibe-coding-cli ↗License NOASSERTION

Create Mermaid diagrams for flowcharts, sequences, ERDs, and architectures. Masters syntax for all diagram types and styling. Use PROACTIVELY for visual documentation, system diagrams, or process flows.

SkillScore82Maintained

Automatic

Doc Ops pack

Last verified 8/29/2026

What it changes

Passed 18 of 22 test cases with the skill, and 10 of 22 without it.

Without skill45%

With skill82%

Checks it passed that the model alone missed

Output provides export recommendations
Output provides both basic and styled versions
Output uses gantt syntax to represent the schedule

and 11 more in the full report

10 fixed8 passed either way2 still failing2 broke

Pass-rate lift: +36 pp
Tokens: +23%
Agent turns: 0%
Response time: +12%

Model gemini-3.6-flashMeasured 8/29/2026v118 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-mermaid-expert/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-mermaid-expert/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dokhacgiakhoa-mermaid-expert, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dokhacgiakhoa-mermaid-expert/ and pins it in .decimal/skills.lock

decimalai skills add dokhacgiakhoa-mermaid-expert

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dokhacgiakhoa-mermaid-expert/SKILL.md https://app.decimal.ai/s/dokhacgiakhoa-mermaid-expert/SKILL.md

Raw file: /s/dokhacgiakhoa-mermaid-expert/SKILL.md ↗ · machine-readable summary at /s/dokhacgiakhoa-mermaid-expert.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 10

Prompt

Design a Mermaid entity relationship diagram for a hospital management system and recommend other visual formats for stakeholder reviews.

What was checked, without and with the skill
Checked	Without skill	With skill
Output explicitly suggests alternative diagram types	Passed	Passed
Output includes accessibility design considerations	Missed	Passed

case-17 · gemini-3.6-flash · 8/29/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md50 linessingle file

Use this skill when

Working on mermaid expert tasks or workflows
Needing guidance, best practices, or checklists for mermaid expert

Do not use this skill when

The task is unrelated to mermaid expert
You need a different domain or tool outside this scope

Instructions

Clarify goals, constraints, and required inputs.
Apply relevant best practices and validate outcomes.
Provide actionable steps and verification.
If detailed examples are required, open resources/implementation-playbook.md.

You are a Mermaid diagram expert specializing in clear, professional visualizations.

Focus Areas

Flowcharts and decision trees
Sequence diagrams for APIs/interactions
Entity Relationship Diagrams (ERD)
State diagrams and user journeys
Gantt charts for project timelines
Architecture and network diagrams

Diagram Types Expertise

graph (flowchart), sequenceDiagram, classDiagram, 
stateDiagram-v2, erDiagram, gantt, pie, 
gitGraph, journey, quadrantChart, timeline

Approach

Choose the right diagram type for the data
Keep diagrams readable - avoid overcrowding
Use consistent styling and colors
Add meaningful labels and descriptions
Test rendering before delivery

Track record

Benchmark

18 / 22

test cases passed, vs 10 / 22 without

Adoption

Users: 1
Times used: 11

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dokhacgiakhoa / agent-skills-4-vibe-coding-cli

.agent/skills/mermaid-expert/SKILL.md

View on GitHub ↗

License NOASSERTIONImported 8/10/2026Version v1

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