teknium1 669545f551 Add diagramming skills for Excalidraw

- Introduced a new DESCRIPTION.md file outlining diagram creation skills for visual diagrams and flowcharts using Excalidraw.
- Added SKILL.md for the Excalidraw skill, detailing its functionality, usage, and workflow for creating hand-drawn style diagrams.
- Created references for color palettes, dark mode diagrams, and example diagrams to assist users in utilizing the Excalidraw skill effectively.
- Implemented an upload script for sharing diagrams via Excalidraw.com, ensuring user-friendly access to generated diagrams.

2026-02-10 19:30:46 -08:00

7.9 KiB

Raw Blame History

Excalidraw Diagram Examples

Complete, copy-pasteable examples. Wrap each in the .excalidraw envelope before saving:

{
  "type": "excalidraw",
  "version": 2,
  "source": "hermes-agent",
  "elements": [ ...elements from examples below... ],
  "appState": { "viewBackgroundColor": "#ffffff" }
}

Example 1: Two Connected Labeled Boxes

A minimal flowchart with two boxes and an arrow between them.

[
  { "type": "text", "id": "title", "x": 280, "y": 30, "text": "Simple Flow", "fontSize": 28, "strokeColor": "#1e1e1e" },
  { "type": "rectangle", "id": "b1", "x": 100, "y": 100, "width": 200, "height": 100, "roundness": { "type": 3 }, "backgroundColor": "#a5d8ff", "fillStyle": "solid", "label": { "text": "Start", "fontSize": 20 } },
  { "type": "rectangle", "id": "b2", "x": 450, "y": 100, "width": 200, "height": 100, "roundness": { "type": 3 }, "backgroundColor": "#b2f2bb", "fillStyle": "solid", "label": { "text": "End", "fontSize": 20 } },
  { "type": "arrow", "id": "a1", "x": 300, "y": 150, "width": 150, "height": 0, "points": [[0,0],[150,0]], "endArrowhead": "arrow", "startBinding": { "elementId": "b1", "fixedPoint": [1, 0.5] }, "endBinding": { "elementId": "b2", "fixedPoint": [0, 0.5] } }
]

Example 2: Photosynthesis Process Diagram

A larger diagram with background zones, multiple nodes, and directional arrows showing inputs/outputs.

[
  {"type":"text","id":"ti","x":280,"y":10,"text":"Photosynthesis","fontSize":28,"strokeColor":"#1e1e1e"},
  {"type":"text","id":"fo","x":245,"y":48,"text":"6CO2 + 6H2O --> C6H12O6 + 6O2","fontSize":16,"strokeColor":"#757575"},
  {"type":"rectangle","id":"lf","x":150,"y":90,"width":520,"height":380,"backgroundColor":"#d3f9d8","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#22c55e","strokeWidth":1,"opacity":35},
  {"type":"text","id":"lfl","x":170,"y":96,"text":"Inside the Leaf","fontSize":16,"strokeColor":"#15803d"},
  {"type":"rectangle","id":"lr","x":190,"y":190,"width":160,"height":70,"backgroundColor":"#fff3bf","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#f59e0b","label":{"text":"Light Reactions","fontSize":16}},
  {"type":"arrow","id":"a1","x":350,"y":225,"width":120,"height":0,"points":[[0,0],[120,0]],"strokeColor":"#1e1e1e","strokeWidth":2,"endArrowhead":"arrow","label":{"text":"ATP","fontSize":14}},
  {"type":"rectangle","id":"cc","x":470,"y":190,"width":160,"height":70,"backgroundColor":"#d0bfff","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#8b5cf6","label":{"text":"Calvin Cycle","fontSize":16}},
  {"type":"rectangle","id":"sl","x":10,"y":200,"width":120,"height":50,"backgroundColor":"#fff3bf","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#f59e0b","label":{"text":"Sunlight","fontSize":16}},
  {"type":"arrow","id":"a2","x":130,"y":225,"width":60,"height":0,"points":[[0,0],[60,0]],"strokeColor":"#f59e0b","strokeWidth":2,"endArrowhead":"arrow"},
  {"type":"rectangle","id":"wa","x":200,"y":360,"width":140,"height":50,"backgroundColor":"#a5d8ff","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#4a9eed","label":{"text":"Water (H2O)","fontSize":16}},
  {"type":"arrow","id":"a3","x":270,"y":360,"width":0,"height":-100,"points":[[0,0],[0,-100]],"strokeColor":"#4a9eed","strokeWidth":2,"endArrowhead":"arrow"},
  {"type":"rectangle","id":"co","x":480,"y":360,"width":130,"height":50,"backgroundColor":"#ffd8a8","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#f59e0b","label":{"text":"CO2","fontSize":16}},
  {"type":"arrow","id":"a4","x":545,"y":360,"width":0,"height":-100,"points":[[0,0],[0,-100]],"strokeColor":"#f59e0b","strokeWidth":2,"endArrowhead":"arrow"},
  {"type":"rectangle","id":"ox","x":540,"y":100,"width":100,"height":40,"backgroundColor":"#ffc9c9","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#ef4444","label":{"text":"O2","fontSize":16}},
  {"type":"arrow","id":"a5","x":310,"y":190,"width":230,"height":-50,"points":[[0,0],[230,-50]],"strokeColor":"#ef4444","strokeWidth":2,"endArrowhead":"arrow"},
  {"type":"rectangle","id":"gl","x":690,"y":195,"width":120,"height":60,"backgroundColor":"#c3fae8","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#22c55e","label":{"text":"Glucose","fontSize":18}},
  {"type":"arrow","id":"a6","x":630,"y":225,"width":60,"height":0,"points":[[0,0],[60,0]],"strokeColor":"#22c55e","strokeWidth":2,"endArrowhead":"arrow"},
  {"type":"ellipse","id":"sun","x":30,"y":110,"width":50,"height":50,"backgroundColor":"#fff3bf","fillStyle":"solid","strokeColor":"#f59e0b","strokeWidth":2},
  {"type":"arrow","id":"r1","x":55,"y":108,"width":0,"height":-14,"points":[[0,0],[0,-14]],"strokeColor":"#f59e0b","strokeWidth":2,"endArrowhead":null,"startArrowhead":null},
  {"type":"arrow","id":"r2","x":55,"y":162,"width":0,"height":14,"points":[[0,0],[0,14]],"strokeColor":"#f59e0b","strokeWidth":2,"endArrowhead":null,"startArrowhead":null},
  {"type":"arrow","id":"r3","x":28,"y":135,"width":-14,"height":0,"points":[[0,0],[-14,0]],"strokeColor":"#f59e0b","strokeWidth":2,"endArrowhead":null,"startArrowhead":null},
  {"type":"arrow","id":"r4","x":82,"y":135,"width":14,"height":0,"points":[[0,0],[14,0]],"strokeColor":"#f59e0b","strokeWidth":2,"endArrowhead":null,"startArrowhead":null}
]

Example 3: Sequence Diagram (UML-style)

Demonstrates a sequence diagram with actors, dashed lifelines, and message arrows.

[
  {"type":"text","id":"title","x":200,"y":15,"text":"MCP Apps — Sequence Flow","fontSize":24,"strokeColor":"#1e1e1e"},
  {"type":"rectangle","id":"uHead","x":60,"y":60,"width":100,"height":40,"backgroundColor":"#a5d8ff","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#4a9eed","strokeWidth":2,"label":{"text":"User","fontSize":16}},
  {"type":"arrow","id":"uLine","x":110,"y":100,"width":0,"height":400,"points":[[0,0],[0,400]],"strokeColor":"#b0b0b0","strokeWidth":1,"strokeStyle":"dashed","endArrowhead":null},
  {"type":"rectangle","id":"aHead","x":230,"y":60,"width":100,"height":40,"backgroundColor":"#d0bfff","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#8b5cf6","strokeWidth":2,"label":{"text":"Agent","fontSize":16}},
  {"type":"arrow","id":"aLine","x":280,"y":100,"width":0,"height":400,"points":[[0,0],[0,400]],"strokeColor":"#b0b0b0","strokeWidth":1,"strokeStyle":"dashed","endArrowhead":null},
  {"type":"rectangle","id":"sHead","x":420,"y":60,"width":130,"height":40,"backgroundColor":"#ffd8a8","fillStyle":"solid","roundness":{"type":3},"strokeColor":"#f59e0b","strokeWidth":2,"label":{"text":"Server","fontSize":16}},
  {"type":"arrow","id":"sLine","x":485,"y":100,"width":0,"height":400,"points":[[0,0],[0,400]],"strokeColor":"#b0b0b0","strokeWidth":1,"strokeStyle":"dashed","endArrowhead":null},
  {"type":"arrow","id":"m1","x":110,"y":150,"width":170,"height":0,"points":[[0,0],[170,0]],"strokeColor":"#1e1e1e","strokeWidth":2,"endArrowhead":"arrow","label":{"text":"request","fontSize":14}},
  {"type":"arrow","id":"m2","x":280,"y":200,"width":205,"height":0,"points":[[0,0],[205,0]],"strokeColor":"#8b5cf6","strokeWidth":2,"endArrowhead":"arrow","label":{"text":"tools/call","fontSize":14}},
  {"type":"arrow","id":"m3","x":485,"y":260,"width":-205,"height":0,"points":[[0,0],[-205,0]],"strokeColor":"#f59e0b","strokeWidth":2,"endArrowhead":"arrow","strokeStyle":"dashed","label":{"text":"result","fontSize":14}},
  {"type":"arrow","id":"m4","x":280,"y":320,"width":-170,"height":0,"points":[[0,0],[-170,0]],"strokeColor":"#8b5cf6","strokeWidth":2,"endArrowhead":"arrow","strokeStyle":"dashed","label":{"text":"response","fontSize":14}}
]

Common Mistakes to Avoid

Elements overlap when y-coordinates are close -- always check that text, boxes, and labels don't stack on top of each other
Arrow labels need space -- long labels like "ATP + NADPH" overflow short arrows. Keep labels short or make arrows wider
Center titles relative to the diagram -- estimate total width and center the title text over it
Draw decorations LAST -- cute illustrations (sun, stars, icons) should appear at the end of the array so they're drawn on top

7.9 KiB Raw Blame History