scofieldfree/excalidraw-mcp/excalidraw-drawing-accuracy

Excalidraw Drawing (Minimal)

Use this skill for fast, stable diagram output with minimal process overhead.

Source of truth: this file is the primary definition.

Tools

• start_session
• create_from_mermaid
• add_elements
• update_element
• get_scene

Rules

1. Always call start_session first for the target sessionId.
2. Strategy routing:

• Mermaid input ( `mermaid block or Mermaid DSL) -> create_from_mermaid
• Non-Mermaid input -> add_elements / update_element

1. Use segmented writes for medium/large diagrams (2-4 batches).
2. Prefer updating by id.

Default Style

When user does not specify style, use Ghibli:

• Primary: #f0f9ff / #0369a1
• Secondary: #f7fee7 / #365314
• Accent: #fff7ed / #9a3412
• Shared: fillStyle: "hachure", roughness: 2, roundness: { "type": 3 }

If user specifies style, follow user style.

Workflow

1. start_session(sessionId)
2. First render:

• Mermaid -> create_from_mermaid
• Manual -> add_elements (segmented)

1. Quick polish with update_element
2. Verify with get_scene

Quick Verification

• get_scene succeeds
• key nodes/edges exist
• labels are readable on core nodes
• no obvious broken connector on core flow

If checks fail, fix only the affected region and re-check.

Completion Output

Report:

1. sessionId
2. created/updated ids
3. verification pass/fail