Night Market Skill — ported from claude-night-market/cartograph. For the full experience with agents, hooks, and commands, install the Claude Code plugin.

Architecture Diagram#

Generate a Mermaid flowchart showing high-level component relationships in a codebase.

When To Use#

• Visualizing how plugins/modules relate to each other
• Onboarding to understand system structure
• Documenting architecture for PR reviews
• Answering "how does this system fit together?"

Workflow#

Step 1: Explore the Codebase#

Dispatch the codebase explorer agent to analyze the scope:

text

Agent(cartograph:codebase-explorer)
Prompt: Explore [scope] and return a structural model.
Focus on packages, modules, and their relationships
for an architecture diagram.

If no scope is provided, use the project root.

Step 2: Generate Mermaid Syntax#

Transform the structural model into a Mermaid flowchart.

Rules for architecture diagrams:

• Use flowchart TD (top-down) for hierarchical systems
• Use flowchart LR (left-right) for pipeline/flow systems
• Group related modules into subgraphs by package
• Use descriptive edge labels for relationships
• Limit to 15-20 nodes maximum (aggregate small modules)
• Use shapes to distinguish component types:
  • [Rectangle] for modules/packages
  • ([Stadium]) for entry points/commands
  • [(Database)] for data stores
  • {Diamond} for decision points

Example output:

Rendering diagram...

Step 3: Render via MCP#

Call the Mermaid Chart MCP to render:

text

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

If rendering fails, fix the Mermaid syntax based on the error message and retry (max 2 retries).

Step 4: Present Results#

Show the rendered diagram to the user with a brief summary of what it depicts (2-3 sentences).