Workflow Diagram

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).

Exit Criteria

• [ ] Mermaid flowchart syntax generated containing at least one

diamond {Decision} node representing a conditional branch

• [ ] mcp__claude_ai_Mermaid_Chart__validate_and_render_mermaid_diagram

called and returns without error (or retry attempted and result reported)

• [ ] Error/fallback paths rendered as dotted arrows (-.->) distinct

from happy-path arrows when error paths exist in the source

• [ ] Node count is at most 20; if more steps exist, sub-processes

are collapsed into [[Subroutine]] nodes

• [ ] A 2-3 sentence description of workflow stages and decision

points is shown alongside the diagram

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: athola
• Source: athola/claude-night-market
• License: MIT
• Homepage: https://athola.github.io/claude-night-market

Install and usage instructions live in the source repository linked above.