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workflow-diagram

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Generates a Mermaid workflow diagram showing process steps, decisions, and state transitions. Use when documenting CI/CD pipelines or lifecycle processes.

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How to use this skill

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/documents/workflow-diagram/SKILL.md

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Workflow Diagram

Generate a Mermaid flowchart showing process workflows, pipelines, or state machines from code or documentation.

When To Use

  • Visualizing CI/CD or deployment pipelines
  • Documenting multi-step development workflows
  • Mapping state machines or lifecycle processes
  • Answering "what steps happen when X runs?"

Workflow

Step 1: Explore the Codebase

Dispatch the codebase explorer agent:

Agent(cartograph:codebase-explorer)
Prompt: Explore [scope] and return a structural model.
Focus on process steps, conditional logic, state
transitions, and pipeline stages for a workflow diagram.
Look for: Makefiles, CI configs, hook chains, command
sequences, and lifecycle methods.

Step 2: Generate Mermaid Syntax

Transform the structural model into a Mermaid flowchart with decision nodes and process steps.

Rules for workflow diagrams:

  • Use flowchart TD for sequential processes
  • Use flowchart LR for pipelines with parallel tracks
  • Use shapes to distinguish step types:
    • [Rectangle] for process steps
    • {Diamond} for decision points
    • ([Stadium]) for start/end states
    • [[Subroutine]] for sub-processes
    • ((Circle)) for join/sync points
  • Use -->|label| for transition conditions
  • Group parallel tracks into subgraphs
  • Color-code by outcome:
    • Default for happy path
    • Dotted (-.->) for error/fallback paths
    • Thick (==>) for critical path
  • Limit to 20 nodes maximum

Example output:

flowchart TD
    start([Start: PR Created])
    lint[Run Linters]
    test[Run Tests]
    review{Code Review}
    approve[Approved]
    changes[Request Changes]
    merge([Merge to Main])

    start --> lint --> test
    test --> review
    review -->|pass| approve --> merge
    review -->|fail| changes -.-> lint

Step 3: Render via MCP

Call the Mermaid Chart MCP to render:

mcp__claude_ai_Mermaid_Chart__validate_and_render_mermaid_diagram
  prompt: "Workflow diagram of [scope/process]"
  mermaidCode: [generated syntax]
  diagramType: "flowchart"
  clientName: "claude-code"

If rendering fails, fix syntax and retry (max 2 retries).

Step 4: Present Results

Show the rendered diagram with a brief description of the workflow stages and decision points (2-3 sentences).