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obsidian-mermaid Checked

Create Obsidian-compatible Mermaid diagrams. Prefer square layouts (TB + subgraph LR), avoid mark…
✍️ Writing skills By jykim Version v1.0.0 Added 2026-10-21 Updated 2026-10-21 Source ↗ Part of Knowledge Management →
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Installation

🤖 Install via AI

Copy the prompt below and send it to your AI assistant (e.g. Claude Code) — it will follow the instructions and install automatically.

Install the "obsidian-mermaid" skill by following the instructions at https://skill123.me/install/obsidian-mermaid.
⌨️ Command line install

Run in your terminal — downloads and installs to ~/.claude/skills/.

curl -fsSL https://skill123.me/install/obsidian-mermaid.sh | bash
📦 Download ZIP

Download the zip and extract it into your skills directory (e.g. ~/.claude/skills/), then restart your session.

⬇ Download v1.0.0 · 3 KB
📊 Static rating
8.0/10
Trigger
8.0
Structure
0.0
Workflow
8.0
Content
0.0
Engineering
0.0
Security
7.0

Six-dimension rubric with reviewer rationale.

View scorecard ↓
🛡 Dynamic test
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Not live-tested yet — this skill is rated on static analysis only.

About this skill

Create Obsidian-compatible Mermaid diagrams. Prefer square layouts (TB + subgraph LR), avoid markdown in labels. Use when creating flowcharts, sequence diagrams, or any Mermaid diagrams in markdown files.

Obsidian Mermaid Diagrams

Create Mermaid diagrams that render correctly in Obsidian and publish without issues.

Documentation

Create Obsidian-compatible Mermaid diagrams. Prefer square layouts (TB + subgraph LR), avoid markdown in labels. Use when creating flowcharts, sequence diagrams, or any Mermaid diagrams in markdown files.

Obsidian Mermaid Diagrams

Create Mermaid diagrams that render correctly in Obsidian and publish without issues.

When to Use This Skill

Activate when you need to:

  • Create flowcharts, sequence diagrams, ER diagrams
  • Convert ASCII art to Mermaid
  • Fix Mermaid rendering errors in Obsidian

Core Principle: Simplicity First

> **다이어그램은 한눈에 들어와야 한다**

복잡한 다이어그램은 읽기 어렵다. 항상 최소한의 노드와 연결로 핵심만 표현하라.

### Node Minimization

**Before** (9개 노드):


flowchart LR
    A[수집] --> B[정리] --> C[보관]
    D[목표] --> E[학습] --> F[실행] --> G[측정] --> H[달성]

**After** (2개 노드 - 순차 흐름을 노드 내 텍스트로):


flowchart LR
    A[수집 → 정리 → 보관]
    B[목표 → 학습 → 실행 → 달성]

### Connection Minimization

  • 핵심 흐름만 표현, 세부사항은 본문에서 설명
  • 노드 5개 이하, 연결선 교차 금지
  • 복잡한 관계는 여러 개의 단순한 다이어그램으로 분리

### Table vs Mermaid 선택

| 형식 | 용도 | 예시 |

|------|------|------|

| **테이블** | 속성-값 매핑, 비교, 옵션 | 에너지 레벨별 작업 |

| **Mermaid** | 흐름, 프로세스, 피드백 루프 | 입력→처리→출력 |

| **인라인** | 단순 순차 흐름 | A → B → C |

**원칙**: 같은 정보를 더 컴팩트하게 표현하는 형식 선택

---

Critical Rules

### 1. NO Markdown in Labels

**Common Errors**:


Node["1. First"]     → "Unsupported markdown: list"
Node["Text<br/>More"] → "Unsupported markdown: heading"
Node["## Header"]    → "Unsupported markdown: heading"

**Correct**:


Node[First]
Node[Text]

**Rule**: Keep labels plain text. Move complex descriptions outside the diagram.

### 2. Prefer Square Layout (정사각형 레이아웃)

**Problem**: flowchart LR은 너무 넓고, flowchart TB는 너무 길어진다.

**Solution**: TB + 내부 LR 조합으로 정사각형에 가까운 레이아웃 만들기


flowchart TB
    subgraph Layer1["레이어 1"]
        direction LR
        A[항목A] ~~~ B[항목B] ~~~ C[항목C]
    end

    subgraph Layer2["레이어 2"]
        direction LR
        D[항목D] ~~~ E[항목E]
    end

    Layer1 --> Layer2

**패턴**:

  • flowchart TB: 전체 흐름은 위→아래
  • direction LR: 각 subgraph 내부는 가로 배치
  • ~~~: 보이지 않는 연결 (화살표 없이 정렬용)

**Rule**: 세로로 너무 길어지면 subgraph + direction LR 사용.

### 3. Keep Labels Short


❌ Too long:
Node["This is a very long description that will break layout"]

✅ Short and clear:
Node[Short Label]

**Rule**: Labels should be under 15 characters. Add details in text below the diagram.

### 4. Avoid Special Characters in Subgraph Names


❌ May cause issues:
subgraph "1. Phase One"
subgraph "Phase: Setup"

✅ Safe:
subgraph Phase_One["Phase One"]
subgraph Setup["Setup Phase"]

Good Examples

### Simple Flowchart


flowchart TB
    A[Start] --> B{Decision}
    B -->|Yes| C[Action]
    B -->|No| D[End]

### Process Flow with Details Outside


flowchart TB
    Input[Input] --> Process[Process]
    Process --> Output[Output]

**Process Details**:

  • Input: User data from form
  • Process: Validation and transformation
  • Output: Saved to database
View full documentation

### Subgraph Example


flowchart TB
    subgraph Frontend["Frontend"]
        UI[UI] --> API[API Call]
    end
    subgraph Backend["Backend"]
        Server[Server] --> DB[Database]
    end
    API --> Server

Bad Examples (Don't Do This)

### Markdown in Labels


flowchart LR
    A["1. Start<br/>with details"] --> B{"2. Decision"}

This will show "Unsupported markdown" errors.

### Too Wide


flowchart LR
    A[Very Long Process Name Here] --> B[Another Long Name] --> C[Yet Another] --> D[And More]

This gets cut off on mobile and narrow screens.

Converting ASCII to Mermaid

**ASCII Art**:


┌───────┐     ┌───────┐
│ Start │────→│  End  │
└───────┘     └───────┘

**Mermaid**:


flowchart TB
    Start[Start] --> End[End]

Quality Checklist

Before completing diagram creation:

  • [ ] No <br/> tags in node labels
  • [ ] No numbered list format (1., 2.) in labels
  • [ ] **정사각형 레이아웃**: TB + subgraph 내 LR 조합 사용
  • [ ] All labels are short (under 15 characters)
  • [ ] Complex details moved to text outside diagram
  • [ ] No special characters in subgraph names
  • [ ] Tested rendering in Obsidian preview

Score breakdown

Trigger
8.0
Structure
0.0
Workflow
8.0
Content
0.0
Engineering
0.0
Security
7.0