Mermaid Visualizer

Overview

Convert text content into clean, professional Mermaid diagrams optimized for presentations and documentation. Automatically handles common syntax pitfalls (list syntax conflicts, subgraph naming, spacing issues) to ensure diagrams render correctly in Obsidian, GitHub, and other Mermaid-compatible platforms.

Quick Start

When creating a Mermaid diagram:

1. 1. Analyze the content - Identify key concepts, relationships, and flow
2. Choose diagram type - Select the most appropriate visualization (see Diagram Types below)
3. Select configuration - Determine layout, detail level, and styling
4. Generate diagram - Create syntactically correct Mermaid code
5. Output in markdown - Wrap in proper code fence with optional explanation

Default assumptions:

• - Vertical layout (TB) unless horizontal requested
• Medium detail level (balanced between simplicity and information)
• Professional color scheme with semantic colors
• Obsidian/GitHub compatible syntax

Diagram Types

1. Process Flow (graph TB/LR)

Best for: Workflows, decision trees, sequential processes, AI agent architectures

Use when: Content describes steps, stages, or a sequence of actions

Key features:

• - Swimlanes via subgraph for grouping related steps
• Arrow labels for transitions
• Feedback loops and branches
• Color-coded stages

Configuration options:

• - layout: "vertical" (TB), "horizontal" (LR)
• INLINECODE1: "simple" (core steps only), "standard" (with descriptions), "detailed" (with annotations)
• INLINECODE2: "minimal", "professional", "colorful"

2. Circular Flow (graph TD with circular layout)

Best for: Cyclic processes, continuous improvement loops, agent feedback systems

Use when: Content emphasizes iteration, feedback, or circular relationships

Key features:

• - Central hub with radiating elements
• Curved feedback arrows
• Clear cycle indicators

3. Comparison Diagram (graph TB with parallel paths)

Best for: Before/after comparisons, A vs B analysis, traditional vs modern systems

Use when: Content contrasts two or more approaches or systems

Key features:

• - Side-by-side layout
• Central comparison node
• Clear differentiation via color/style

4. Mindmap

Best for: Hierarchical concepts, knowledge organization, topic breakdowns

Use when: Content is hierarchical with clear parent-child relationships

Key features:

• - Radial tree structure
• Multiple levels of nesting
• Clean visual hierarchy

5. Sequence Diagram

Best for: Interactions between components, API calls, message flows

Use when: Content involves communication between actors/systems over time

Key features:

• - Timeline-based layout
• Clear actor separation
• Activation boxes for processes

6. State Diagram

Best for: System states, status transitions, lifecycle stages

Use when: Content describes states and transitions between them

Key features:

• - Clear state nodes
• Labeled transitions
• Start and end states

Critical Syntax Rules

Always follow these rules to prevent parsing errors:

Rule 1: Avoid List Syntax Conflicts

CODEBLOCK0

Rule 2: Subgraph Naming

CODEBLOCK1

Rule 3: Node References

CODEBLOCK2

Rule 4: Special Characters in Node Text

CODEBLOCK3

Rule 5: Arrow Types

• - --> solid arrow
• INLINECODE4 dashed arrow (for supporting systems, optional paths)
• INLINECODE5 thick arrow (for emphasis)
• INLINECODE6 invisible link (for layout only)

For complete syntax reference and edge cases, see references/syntax-rules.md

Configuration Options

All diagrams accept these parameters:

Layout:

• - direction: "vertical" (TB), "horizontal" (LR), "right-to-left" (RL), "bottom-to-top" (BT)
• INLINECODE8: "portrait" (default), "landscape" (wide), "square"

Detail Level:

• - simple: Core elements only, minimal labels
• INLINECODE10: Balanced detail with key descriptions (default)
• INLINECODE11: Full annotations, explanations, and metadata
• INLINECODE12: Optimized for slides (larger text, fewer details)

Style:

• - minimal: Monochrome, clean lines
• INLINECODE14: Semantic colors, clear hierarchy (default)
• INLINECODE15: Vibrant colors, high contrast
• INLINECODE16: Formal styling for papers/documentation

Additional Options:

• - show_legend: true/false - Include color/symbol legend
• INLINECODE18: true/false - Add sequence numbers to steps
• INLINECODE19: string - Add diagram title

Example Usage Patterns

Pattern 1: Basic request
CODEBLOCK4

Pattern 2: With configuration
CODEBLOCK5

Pattern 3: Comparison
CODEBLOCK6

Workflow

1. 1. Understand the content

- Identify main concepts, entities, and relationships - Determine hierarchy or sequence - Note any comparisons or contrasts

1. 2. Select diagram type

- Match content structure to diagram type - Consider user's presentation context - Default to process flow if ambiguous

1. 3. Choose configuration

- Apply user-specified options - Use sensible defaults for unspecified options - Optimize for readability

1. 4. Generate Mermaid code

- Follow all syntax rules strictly - Use semantic naming (descriptive IDs) - Apply consistent styling - Test for common errors: * No "number. space" patterns in node text * All subgraphs use ID["display name"] format * All node references use IDs not display names

1. 5. Output with context

- Wrap in ```mermaid code fence - Add brief explanation of diagram structure - Mention rendering compatibility (Obsidian, GitHub, etc.) - Offer to adjust or create variations

Color Scheme Defaults

Standard professional palette:

• - Green (#d3f9d8/#2f9e44): Input, perception, start states
• Red (#ffe3e3/#c92a2a): Planning, decision points
• Purple (#e5dbff/#5f3dc4): Processing, reasoning
• Orange (#ffe8cc/#d9480f): Actions, tool usage
• Cyan (#c5f6fa/#0c8599): Output, execution, results
• Yellow (#fff4e6/#e67700): Storage, memory, data
• Pink (#f3d9fa/#862e9c): Learning, optimization
• Blue (#e7f5ff/#1971c2): Metadata, definitions, titles
• Gray (#f8f9fa/#868e96): Neutral elements, traditional systems

Common Patterns

Swimlane Pattern (Grouping)

CODEBLOCK7

Feedback Loop Pattern

CODEBLOCK8

Hub and Spoke Pattern

CODEBLOCK9

Quality Checklist

Before outputting, verify:

• - [ ] No "number. space" patterns in any node text
• [ ] All subgraphs use proper ID syntax
• [ ] All arrows use correct syntax (-->, -.->)
• [ ] Colors applied consistently
• [ ] Layout direction specified
• [ ] Style declarations present
• [ ] No ambiguous node references
• [ ] Compatible with Obsidian/GitHub renderers
• [ ] No Emoji in any node text - use text labels or color coding instead

References

For detailed syntax rules and troubleshooting, see:

• - references/syntax-rules.md - Complete syntax reference and error prevention