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+MIT License
+
+Copyright (c) 2026 Steph Ango (@kepano)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
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+---
+name: json-canvas
+description: Create and edit JSON Canvas (.canvas) files with valid nodes, edges, groups, colors, layout, IDs, and referential integrity. Use for Obsidian Canvas files, visual maps, flowcharts, project boards, or any request involving the JSON Canvas format.
+license: MIT
+metadata:
+  copilot-enabled-agents: claude, codex, opencode
+  copilot-builtin-version: "1"
+  copilot-upstream-revision: "a1dc48e68138490d522c04cbf5822214c6eb1202"
+---
+
+# JSON Canvas
+
+Follow JSON Canvas 1.0. A <code>.canvas</code> document contains top-level
+<code>nodes</code> and <code>edges</code> arrays.
+
+## Workflow
+
+1. Parse the existing JSON before editing it.
+2. Generate a unique lowercase 16-character hexadecimal ID for each new node
+   or edge.
+3. Position nodes without overlap and preserve intentional existing layout.
+4. Point every edge at existing node IDs.
+5. Serialize valid JSON and run the validation checklist below.
+
+## Nodes
+
+Every node requires <code>id</code>, <code>type</code>, <code>x</code>,
+<code>y</code>, <code>width</code>, and <code>height</code>.
+
+| Type | Required content | Purpose |
+| --- | --- | --- |
+| <code>text</code> | <code>text</code> | Markdown content |
+| <code>file</code> | <code>file</code> | Vault file; optional <code>subpath</code> |
+| <code>link</code> | <code>url</code> | External URL |
+| <code>group</code> | none | Visual container; optional label/background |
+
+Array order controls z-index: earlier nodes are behind later nodes. Coordinates
+may be negative. Position is the top-left corner, x increases right, and y
+increases down.
+
+~~~json
+{
+  "id": "6f0ad84f44ce9c17",
+  "type": "text",
+  "x": 0,
+  "y": 0,
+  "width": 360,
+  "height": 180,
+  "text": "# Main idea\n\nDetails",
+  "color": "5"
+}
+~~~
+
+Use actual JSON newline escapes in text values. Do not double-escape them into
+literal backslash-n text.
+
+## Edges
+
+Every edge requires <code>id</code>, <code>fromNode</code>, and
+<code>toNode</code>. Optional sides are <code>top</code>, <code>right</code>,
+<code>bottom</code>, or <code>left</code>. Optional ends are <code>none</code>
+or <code>arrow</code>.
+
+~~~json
+{
+  "id": "0123456789abcdef",
+  "fromNode": "6f0ad84f44ce9c17",
+  "fromSide": "right",
+  "toNode": "a1b2c3d4e5f67890",
+  "toSide": "left",
+  "toEnd": "arrow",
+  "label": "leads to"
+}
+~~~
+
+## Colors and layout
+
+A color is a hex string or preset <code>"1"</code> through
+<code>"6"</code>. Presets deliberately do not define exact hex colors. Leave
+50–100 px between nodes, 20–50 px padding inside groups, and align to a simple
+grid when creating a new layout.
+
+## Validation checklist
+
+- JSON parses successfully.
+- IDs are unique across nodes and edges.
+- Every <code>fromNode</code> and <code>toNode</code> exists in
+  <code>nodes</code>.
+- Each node type has its required content field.
+- Sides, ends, and colors use allowed values.
+- Nodes do not unintentionally overlap and group children sit inside bounds.
+
+Read [Examples](references/EXAMPLES.md) for complete connected and grouped
+canvases.
+
+## Attribution
+
+Adapted from <code>kepano/obsidian-skills</code> at revision
+<code>a1dc48e68138490d522c04cbf5822214c6eb1202</code>. See <code>LICENSE</code>.
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+# JSON Canvas examples
+
+## Connected notes
+
+~~~json
+{
+  "nodes": [
+    {
+      "id": "8a9b0c1d2e3f4a5b",
+      "type": "text",
+      "x": 0,
+      "y": 0,
+      "width": 300,
+      "height": 140,
+      "text": "# Main idea"
+    },
+    {
+      "id": "1a2b3c4d5e6f7a8b",
+      "type": "file",
+      "x": 400,
+      "y": 0,
+      "width": 300,
+      "height": 200,
+      "file": "Notes/Supporting note.md",
+      "subpath": "#Evidence"
+    }
+  ],
+  "edges": [
+    {
+      "id": "3c4d5e6f7a8b9c0d",
+      "fromNode": "8a9b0c1d2e3f4a5b",
+      "fromSide": "right",
+      "toNode": "1a2b3c4d5e6f7a8b",
+      "toSide": "left",
+      "label": "supported by"
+    }
+  ]
+}
+~~~
+
+## Grouped board
+
+~~~json
+{
+  "nodes": [
+    {
+      "id": "5e6f7a8b9c0d1e2f",
+      "type": "group",
+      "x": 0,
+      "y": 0,
+      "width": 320,
+      "height": 500,
+      "label": "In progress",
+      "color": "3"
+    },
+    {
+      "id": "8b9c0d1e2f3a4b5c",
+      "type": "text",
+      "x": 30,
+      "y": 60,
+      "width": 260,
+      "height": 100,
+      "text": "## Task\n\nImplement the feature"
+    }
+  ],
+  "edges": []
+}
+~~~