docs: initialize project and codebase maps

- Finalized PROJECT.md incorporating 'Zero-Pollution' constraints
- Enforced native Git portability (git pull sync only)
- Generated ARCHITECTURE.md and STACK.md maps
- Deleted .agent/skills/.gitignore to physically track flattened skills
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---
name: json-canvas
description: JSON Canvas 형식의 시각적 마인드맵, 노드, 다이어그램, 플로우차트 파일(.canvas)을 생성하고 편집합니다.
---
# JSON Canvas Skill
## File Structure
A canvas file (`.canvas`) contains two top-level arrays following the [JSON Canvas Spec 1.0](https://jsoncanvas.org/spec/1.0/):
```json
{
"nodes": [],
"edges": []
}
```
- `nodes` (optional): Array of node objects
- `edges` (optional): Array of edge objects connecting nodes
## Common Workflows
### 1. Create a New Canvas
1. Create a `.canvas` file with the base structure `{"nodes": [], "edges": []}`
2. Generate unique 16-character hex IDs for each node (e.g., `"6f0ad84f44ce9c17"`)
3. Add nodes with required fields: `id`, `type`, `x`, `y`, `width`, `height`
4. Add edges referencing valid node IDs via `fromNode` and `toNode`
5. **Validate**: Parse the JSON to confirm it is valid. Verify all `fromNode`/`toNode` values exist in the nodes array
### 2. Add a Node to an Existing Canvas
1. Read and parse the existing `.canvas` file
2. Generate a unique ID that does not collide with existing node or edge IDs
3. Choose position (`x`, `y`) that avoids overlapping existing nodes (leave 50-100px spacing)
4. Append the new node object to the `nodes` array
5. Optionally add edges connecting the new node to existing nodes
6. **Validate**: Confirm all IDs are unique and all edge references resolve to existing nodes
### 3. Connect Two Nodes
1. Identify the source and target node IDs
2. Generate a unique edge ID
3. Set `fromNode` and `toNode` to the source and target IDs
4. Optionally set `fromSide`/`toSide` (top, right, bottom, left) for anchor points
5. Optionally set `label` for descriptive text on the edge
6. Append the edge to the `edges` array
7. **Validate**: Confirm both `fromNode` and `toNode` reference existing node IDs
### 4. Edit an Existing Canvas
1. Read and parse the `.canvas` file as JSON
2. Locate the target node or edge by `id`
3. Modify the desired attributes (text, position, color, etc.)
4. Write the updated JSON back to the file
5. **Validate**: Re-check all ID uniqueness and edge reference integrity after editing
## Nodes
Nodes are objects placed on the canvas. Array order determines z-index: first node = bottom layer, last node = top layer.
### Generic Node Attributes
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `id` | Yes | string | Unique 16-char hex identifier |
| `type` | Yes | string | `text`, `file`, `link`, or `group` |
| `x` | Yes | integer | X position in pixels |
| `y` | Yes | integer | Y position in pixels |
| `width` | Yes | integer | Width in pixels |
| `height` | Yes | integer | Height in pixels |
| `color` | No | canvasColor | Preset `"1"`-`"6"` or hex (e.g., `"#FF0000"`) |
### Text Nodes
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `text` | Yes | string | Plain text with Markdown syntax |
```json
{
"id": "6f0ad84f44ce9c17",
"type": "text",
"x": 0,
"y": 0,
"width": 400,
"height": 200,
"text": "# Hello World\n\nThis is **Markdown** content."
}
```
**Newline pitfall**: Use `\n` for line breaks in JSON strings. Do **not** use the literal `\\n` -- Obsidian renders that as the characters `\` and `n`.
### File Nodes
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `file` | Yes | string | Path to file within the system |
| `subpath` | No | string | Link to heading or block (starts with `#`) |
```json
{
"id": "a1b2c3d4e5f67890",
"type": "file",
"x": 500,
"y": 0,
"width": 400,
"height": 300,
"file": "Attachments/diagram.png"
}
```
### Link Nodes
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `url` | Yes | string | External URL |
```json
{
"id": "c3d4e5f678901234",
"type": "link",
"x": 1000,
"y": 0,
"width": 400,
"height": 200,
"url": "https://obsidian.md"
}
```
### Group Nodes
Groups are visual containers for organizing other nodes. Position child nodes inside the group's bounds.
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `label` | No | string | Text label for the group |
| `background` | No | string | Path to background image |
| `backgroundStyle` | No | string | `cover`, `ratio`, or `repeat` |
```json
{
"id": "d4e5f6789012345a",
"type": "group",
"x": -50,
"y": -50,
"width": 1000,
"height": 600,
"label": "Project Overview",
"color": "4"
}
```
## Edges
Edges connect nodes via `fromNode` and `toNode` IDs.
| Attribute | Required | Type | Default | Description |
|-----------|----------|------|---------|-------------|
| `id` | Yes | string | - | Unique identifier |
| `fromNode` | Yes | string | - | Source node ID |
| `fromSide` | No | string | - | `top`, `right`, `bottom`, or `left` |
| `fromEnd` | No | string | `none` | `none` or `arrow` |
| `toNode` | Yes | string | - | Target node ID |
| `toSide` | No | string | - | `top`, `right`, `bottom`, or `left` |
| `toEnd` | No | string | `arrow` | `none` or `arrow` |
| `color` | No | canvasColor | - | Line color |
| `label` | No | string | - | Text label |
```json
{
"id": "0123456789abcdef",
"fromNode": "6f0ad84f44ce9c17",
"fromSide": "right",
"toNode": "a1b2c3d4e5f67890",
"toSide": "left",
"toEnd": "arrow",
"label": "leads to"
}
```
## Colors
The `canvasColor` type accepts either a hex string or a preset number:
| Preset | Color |
|--------|-------|
| `"1"` | Red |
| `"2"` | Orange |
| `"3"` | Yellow |
| `"4"` | Green |
| `"5"` | Cyan |
| `"6"` | Purple |
Preset color values are intentionally undefined -- applications use their own brand colors.
## ID Generation
Generate 16-character lowercase hexadecimal strings (64-bit random value):
```
"6f0ad84f44ce9c17"
"a3b2c1d0e9f8a7b6"
```
## Layout Guidelines
- Coordinates can be negative (canvas extends infinitely)
- `x` increases right, `y` increases down; position is the top-left corner
- Space nodes 50-100px apart; leave 20-50px padding inside groups
- Align to grid (multiples of 10 or 20) for cleaner layouts
| Node Type | Suggested Width | Suggested Height |
|-----------|-----------------|------------------|
| Small text | 200-300 | 80-150 |
| Medium text | 300-450 | 150-300 |
| Large text | 400-600 | 300-500 |
| File preview | 300-500 | 200-400 |
| Link preview | 250-400 | 100-200 |
## Validation Checklist
After creating or editing a canvas file, verify:
1. All `id` values are unique across both nodes and edges
2. Every `fromNode` and `toNode` references an existing node ID
3. Required fields are present for each node type (`text` for text nodes, `file` for file nodes, `url` for link nodes)
4. `type` is one of: `text`, `file`, `link`, `group`
5. `fromSide`/`toSide` values are one of: `top`, `right`, `bottom`, `left`
6. `fromEnd`/`toEnd` values are one of: `none`, `arrow`
7. Color presets are `"1"` through `"6"` or valid hex (e.g., `"#FF0000"`)
8. JSON is valid and parseable
If validation fails, check for duplicate IDs, dangling edge references, or malformed JSON strings (especially unescaped newlines in text content).
## Complete Examples
See [references/EXAMPLES.md](references/EXAMPLES.md) for full canvas examples including mind maps, project boards, research canvases, and flowcharts.
## References
- [JSON Canvas Spec 1.0](https://jsoncanvas.org/spec/1.0/)
- [JSON Canvas GitHub](https://github.com/obsidianmd/jsoncanvas)

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# JSON Canvas Complete Examples
## Simple Canvas with Text and Connections
```json
{
"nodes": [
{
"id": "8a9b0c1d2e3f4a5b",
"type": "text",
"x": 0,
"y": 0,
"width": 300,
"height": 150,
"text": "# Main Idea\n\nThis is the central concept."
},
{
"id": "1a2b3c4d5e6f7a8b",
"type": "text",
"x": 400,
"y": -100,
"width": 250,
"height": 100,
"text": "## Supporting Point A\n\nDetails here."
},
{
"id": "2b3c4d5e6f7a8b9c",
"type": "text",
"x": 400,
"y": 100,
"width": 250,
"height": 100,
"text": "## Supporting Point B\n\nMore details."
}
],
"edges": [
{
"id": "3c4d5e6f7a8b9c0d",
"fromNode": "8a9b0c1d2e3f4a5b",
"fromSide": "right",
"toNode": "1a2b3c4d5e6f7a8b",
"toSide": "left"
},
{
"id": "4d5e6f7a8b9c0d1e",
"fromNode": "8a9b0c1d2e3f4a5b",
"fromSide": "right",
"toNode": "2b3c4d5e6f7a8b9c",
"toSide": "left"
}
]
}
```
## Project Board with Groups
```json
{
"nodes": [
{
"id": "5e6f7a8b9c0d1e2f",
"type": "group",
"x": 0,
"y": 0,
"width": 300,
"height": 500,
"label": "To Do",
"color": "1"
},
{
"id": "6f7a8b9c0d1e2f3a",
"type": "group",
"x": 350,
"y": 0,
"width": 300,
"height": 500,
"label": "In Progress",
"color": "3"
},
{
"id": "7a8b9c0d1e2f3a4b",
"type": "group",
"x": 700,
"y": 0,
"width": 300,
"height": 500,
"label": "Done",
"color": "4"
},
{
"id": "8b9c0d1e2f3a4b5c",
"type": "text",
"x": 20,
"y": 50,
"width": 260,
"height": 80,
"text": "## Task 1\n\nImplement feature X"
},
{
"id": "9c0d1e2f3a4b5c6d",
"type": "text",
"x": 370,
"y": 50,
"width": 260,
"height": 80,
"text": "## Task 2\n\nReview PR #123",
"color": "2"
},
{
"id": "0d1e2f3a4b5c6d7e",
"type": "text",
"x": 720,
"y": 50,
"width": 260,
"height": 80,
"text": "## Task 3\n\n~~Setup CI/CD~~"
}
],
"edges": []
}
```
## Research Canvas with Files and Links
```json
{
"nodes": [
{
"id": "1e2f3a4b5c6d7e8f",
"type": "text",
"x": 300,
"y": 200,
"width": 400,
"height": 200,
"text": "# Research Topic\n\n## Key Questions\n\n- How does X affect Y?\n- What are the implications?",
"color": "5"
},
{
"id": "2f3a4b5c6d7e8f9a",
"type": "file",
"x": 0,
"y": 0,
"width": 250,
"height": 150,
"file": "Literature/Paper A.pdf"
},
{
"id": "3a4b5c6d7e8f9a0b",
"type": "file",
"x": 0,
"y": 200,
"width": 250,
"height": 150,
"file": "Notes/Meeting Notes.md",
"subpath": "#Key Insights"
},
{
"id": "4b5c6d7e8f9a0b1c",
"type": "link",
"x": 0,
"y": 400,
"width": 250,
"height": 100,
"url": "https://example.com/research"
},
{
"id": "5c6d7e8f9a0b1c2d",
"type": "file",
"x": 750,
"y": 150,
"width": 300,
"height": 250,
"file": "Attachments/diagram.png"
}
],
"edges": [
{
"id": "6d7e8f9a0b1c2d3e",
"fromNode": "2f3a4b5c6d7e8f9a",
"fromSide": "right",
"toNode": "1e2f3a4b5c6d7e8f",
"toSide": "left",
"label": "supports"
},
{
"id": "7e8f9a0b1c2d3e4f",
"fromNode": "3a4b5c6d7e8f9a0b",
"fromSide": "right",
"toNode": "1e2f3a4b5c6d7e8f",
"toSide": "left",
"label": "informs"
},
{
"id": "8f9a0b1c2d3e4f5a",
"fromNode": "4b5c6d7e8f9a0b1c",
"fromSide": "right",
"toNode": "1e2f3a4b5c6d7e8f",
"toSide": "left",
"toEnd": "arrow",
"color": "6"
},
{
"id": "9a0b1c2d3e4f5a6b",
"fromNode": "1e2f3a4b5c6d7e8f",
"fromSide": "right",
"toNode": "5c6d7e8f9a0b1c2d",
"toSide": "left",
"label": "visualized by"
}
]
}
```
## Flowchart
```json
{
"nodes": [
{
"id": "a0b1c2d3e4f5a6b7",
"type": "text",
"x": 200,
"y": 0,
"width": 150,
"height": 60,
"text": "**Start**",
"color": "4"
},
{
"id": "b1c2d3e4f5a6b7c8",
"type": "text",
"x": 200,
"y": 100,
"width": 150,
"height": 60,
"text": "Step 1:\nGather data"
},
{
"id": "c2d3e4f5a6b7c8d9",
"type": "text",
"x": 200,
"y": 200,
"width": 150,
"height": 80,
"text": "**Decision**\n\nIs data valid?",
"color": "3"
},
{
"id": "d3e4f5a6b7c8d9e0",
"type": "text",
"x": 400,
"y": 200,
"width": 150,
"height": 60,
"text": "Process data"
},
{
"id": "e4f5a6b7c8d9e0f1",
"type": "text",
"x": 0,
"y": 200,
"width": 150,
"height": 60,
"text": "Request new data",
"color": "1"
},
{
"id": "f5a6b7c8d9e0f1a2",
"type": "text",
"x": 400,
"y": 320,
"width": 150,
"height": 60,
"text": "**End**",
"color": "4"
}
],
"edges": [
{
"id": "a6b7c8d9e0f1a2b3",
"fromNode": "a0b1c2d3e4f5a6b7",
"fromSide": "bottom",
"toNode": "b1c2d3e4f5a6b7c8",
"toSide": "top"
},
{
"id": "b7c8d9e0f1a2b3c4",
"fromNode": "b1c2d3e4f5a6b7c8",
"fromSide": "bottom",
"toNode": "c2d3e4f5a6b7c8d9",
"toSide": "top"
},
{
"id": "c8d9e0f1a2b3c4d5",
"fromNode": "c2d3e4f5a6b7c8d9",
"fromSide": "right",
"toNode": "d3e4f5a6b7c8d9e0",
"toSide": "left",
"label": "Yes",
"color": "4"
},
{
"id": "d9e0f1a2b3c4d5e6",
"fromNode": "c2d3e4f5a6b7c8d9",
"fromSide": "left",
"toNode": "e4f5a6b7c8d9e0f1",
"toSide": "right",
"label": "No",
"color": "1"
},
{
"id": "e0f1a2b3c4d5e6f7",
"fromNode": "e4f5a6b7c8d9e0f1",
"fromSide": "top",
"fromEnd": "none",
"toNode": "b1c2d3e4f5a6b7c8",
"toSide": "left",
"toEnd": "arrow"
},
{
"id": "f1a2b3c4d5e6f7a8",
"fromNode": "d3e4f5a6b7c8d9e0",
"fromSide": "bottom",
"toNode": "f5a6b7c8d9e0f1a2",
"toSide": "top"
}
]
}
```