json-canvas — quality + safety report
In the Skillier index (davila7__json-canvas) · scanned 2026-06-03 · engine: builtin+triage
A
Quality
92/100
Safety
✓ Clean — no heuristic safety flags surfaced.
Heuristic flags from the builtin scanner, which is known to over-flag (it trips on legitimate env-reading integrations, security skills, and library .eval calls). This is NOT an authoritative malicious verdict — re-scan with SkillSpector for the authoritative result. Run the authoritative scan →
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Quality notes
Skill is large (~3434 tokens)
→ Tighten to the essential procedure; move long reference material to linked files.
About this skill
Create and edit JSON Canvas files .canvas with nodes, edges, groups, and connections. Use when working with .canvas files, creating visual canvases, mind maps, flowcharts, or when the user mentions Canvas files in Obsidian.
📄 Read the SKILL.md
---
name: json-canvas
description: Create and edit JSON Canvas files (.canvas) with nodes, edges, groups, and connections. Use when working with .canvas files, creating visual canvases, mind maps, flowcharts, or when the user mentions Canvas files in Obsidian.
---
# JSON Canvas Skill
This skill enables Claude Code to create and edit valid JSON Canvas files (`.canvas`) used in Obsidian and other applications.
## Overview
JSON Canvas is an open file format for infinite canvas data. Canvas files use the `.canvas` extension and contain valid JSON following the [JSON Canvas Spec 1.0](https://jsoncanvas.org/spec/1.0/).
## File Structure
A canvas file contains two top-level arrays:
```json
{
"nodes": [],
"edges": []
}
```
- `nodes` (optional): Array of node objects
- `edges` (optional): Array of edge objects connecting nodes
## Nodes
Nodes are objects placed on the canvas. There are four node types:
- `text` - Text content with Markdown
- `file` - Reference to files/attachments
- `link` - External URL
- `group` - Visual container for other nodes
### Z-Index Ordering
Nodes are ordered by z-index in the array:
- First node = bottom layer (displayed below others)
- Last node = top layer (displayed above others)
### Generic Node Attributes
All nodes share these attributes:
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `id` | Yes | string | Unique identifier for the node |
| `type` | Yes | string | Node type: `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 | Node color (see Color section) |
### Text Nodes
Text nodes contain Markdown content.
```json
{
"id": "6f0ad84f44ce9c17",
"type": "text",
"x": 0,
"y": 0,
"width": 400,
"height": 200,
"text": "# Hello World\n\nThis is **Markdown** content."
}
```
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `text` | Yes | string | Plain text with Markdown syntax |
### File Nodes
File nodes reference files or attachments (images, videos, PDFs, notes, etc.).
```json
{
"id": "a1b2c3d4e5f67890",
"type": "file",
"x": 500,
"y": 0,
"width": 400,
"height": 300,
"file": "Attachments/diagram.png"
}
```
```json
{
"id": "b2c3d4e5f6789012",
"type": "file",
"x": 500,
"y": 400,
"width": 400,
"height": 300,
"file": "Notes/Project Overview.md",
"subpath": "#Implementation"
}
```
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `file` | Yes | string | Path to file within the system |
| `subpath` | No | string | Link to heading or block (starts with `#`) |
### Link Nodes
Link nodes display external URLs.
```json
{
"id": "c3d4e5f678901234",
"type": "link",
"x": 1000,
"y": 0,
"width": 400,
"height": 200,
"url": "https://obsidian.md"
}
```
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `url` | Yes | string | External URL |
### Group Nodes
Group nodes are visual containers for organizing other nodes.
```json
{
"id": "d4e5f6789012345a",
"type": "group",
"x": -50,
"y": -50,
"width": 1000,
"height": 600,
"label": "Project Overview",
"color": "4"
}
```
```json
{
"id": "e5f67890123456ab",
"type": "group",
"x": 0,
"y": 700,
"width": 800,
"height": 500,
"label": "Resources",
"background": "Attachments/background.png",
"backgroundStyle": "cover"
}
```
| Attribute | Required | Type | Description |
|-----------|----------|------|-------------|
| `label` | No | string | Text label for the group |
| `background` | No | string | Path to background image |
| `backgroundStyle` | No | string | Background rendering style |
#### Background Styles
| Value | Description |
|-------|-------------|
| `cover` | Fills entire width and height of node |
| `ratio` | Maintains aspect ratio of background image |
| `repeat` | Repeats image as pattern in both directions |
## Edges
Edges are lines connecting nodes.
```json
{
"id": "f67890123456789a",
"fromNode": "6f0ad84f44ce9c17",
"toNode": "a1b2c3d4e5f67890"
}
```
```json
{
"id": "0123456789abcdef",
"fromNode": "6f0ad84f44ce9c17",
"fromSide": "right",
"fromEnd": "none",
"toNode": "b2c3d4e5f6789012",
"toSide": "left",
"toEnd": "arrow",
"color": "1",
"label": "leads to"
}
```
| Attribute | Required | Type | Default | Description |
|-----------|----------|------|---------|-------------|
| `id` | Yes | string | - | Unique identifier for the edge |
| `fromNode` | Yes | string | - | Node ID where connection starts |
| `fromSide` | No | string | - | Side where edge starts |
| `fromEnd` | No | string | `none` | Shape at edge start |
| `toNode` | Yes | string | - | Node ID where connection ends |
| `toSide` | No | string | - | Side where edge ends |
| `toEnd` | No | string | `arrow` | Shape at edge end |
| `color` | No | canvasColor | - | Line color |
| `label` | No | string | - | Text label for the edge |
### Side Values
| Value | Description |
|-------|-------------|
| `top` | Top edge of node |
| `right` | Right edge of node |
| `bottom` | Bottom edge of node |
| `left` | Left edge of node |
### End Shapes
| Value | Description |
|-------|-------------|
| `none` | No endpoint shape |
| `arrow` | Arrow endpoint |
## Colors
The `canvasColor` type can be specified in two ways:
### Hex Colors
```json
{
"color": "#FF0000"
}
```
### Preset Colors
```json
{
"color": "1"
}
```
| Preset | Color |
|--------|-------|
| `"1"` | Red |
| `"2"` | Orange |
| `"3"` | Yellow |
| `"4"` | Green |
| `"5"` | Cyan |
| `"6"` | Purple |
Note: Specific color values for presets are intentionally undefined, allowing applications to use their own brand colors.
## 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"
},
{
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