canvas

canvas is a skill for Claude Code from tboome33/obsidian-mcp-router. It costs 114 tokens per session (1,393 once invoked), scanned A, original, Apache-2.0.

A visual layout tool for Obsidian Canvas files, which are boards where notes, images, PDFs, links, and text cards can be arranged spatially.

In plain words
What is it for?
Use it to create canvases, group content into labeled areas, and arrange connected notes or media.
Why use it?
It saves you from manually positioning every item when building or updating a visual board.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the obsidian-router plugin — 49 skills, 54 commands, 2 agents, 3 hooks, 1 MCP server shipped together

Good fit Use it to create canvases, group content into labeled areas, and arrange connected notes or media.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tboome33/obsidian-mcp-router/canvas
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add tboome33/obsidian-mcp-router --skill canvas
Clone the repo
git clone --depth 1 https://github.com/tboome33/obsidian-mcp-router

Made for: Claude Code.

Or install obsidian-router, the plugin that ships this one along with the rest of its 49 skills, 54 commands, 2 agents, 3 hooks, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for canvas

README.md
[![agentmods](https://agentmods.dev/badge/skills/tboome33/obsidian-mcp-router/canvas/github.svg)](https://agentmods.dev/skills/tboome33/obsidian-mcp-router/canvas)
Your own site
<a href="https://agentmods.dev/skills/tboome33/obsidian-mcp-router/canvas"><img src="https://agentmods.dev/badge/skills/tboome33/obsidian-mcp-router/canvas/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for canvas

Your own site · 80×15
<a href="https://agentmods.dev/skills/tboome33/obsidian-mcp-router/canvas"><img src="https://agentmods.dev/badge/skills/tboome33/obsidian-mcp-router/canvas.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 114 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,393 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00114 $0.01393
Opus 5 $0.00057 $0.00696
Sonnet 5 $0.00023 $0.00279
Haiku 4.5 $0.00011 $0.00139

Measured 8d ago against content hash a6865e410b45, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

canvas scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/canvas/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

canvas

Obsidian's .canvas files are JSON. This skill writes them programmatically with sensible auto-layout so you don't have to hand-position nodes.

.canvas format primer

A canvas file is a JSON object:

{
  "nodes": [
    {
      "id": "<unique-id>",
      "type": "file|text|link|group",
      "x": <int>, "y": <int>,
      "width": <int>, "height": <int>,
      "color": "1-6 or #hex"   // optional
      // type-specific fields below
    }
  ],
  "edges": [
    {
      "id": "<unique-id>",
      "fromNode": "<node-id>",
      "fromSide": "top|right|bottom|left",
      "toNode": "<node-id>",
      "toSide": "top|right|bottom|left",
      "label": "<optional>"
    }
  ]
}

Type-specific fields:

  • type: "file" → adds "file": "<vault-relative-path>" (any file: .md, .png, .pdf, etc.)
  • type: "text" → adds "text": "<markdown content>"
  • type: "link" → adds "url": "<https://...>"
  • type: "group" → adds "label": "<zone label>", "background": "<optional>"

Operations

canvas-new <name>

Create a new canvas at wiki/canvases/<slug>.canvas (extension is .canvas only — Obsidian renders these with a canvas icon in the file tree). Empty nodes and edges arrays.

canvas-add-text <canvas> <text>

Append a text node. Auto-position: rightmost node's x + width + 50, same y. Default size 300×120.

canvas-add-file <canvas> <path>

Append a file node. Auto-detect size based on file type:

  • Markdown: 400×300
  • Image (.png/.jpg/.webp): 400×400
  • PDF: 600×800
  • Other: 400×300

canvas-add-link <canvas> <url>

Append an external link card. Default size 400×120.

canvas-zone <canvas> <label>

Add a group node. Default size 800×600. Position: below or right of the rightmost group, with a 50px gap.

canvas-add-to-zone <canvas> <zone-label> <node>

Place the new node WITHIN the bounding box of the named zone. Useful for organized layouts ("add this image to the 'References' zone").

canvas-list <canvas>

Read the canvas file, list all nodes with their type/label/file/text-preview. Read-only.

Read the full file on GitHub · 131 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 131 lines · 114 tokens per session scan A a6865e410b45

Subscribe to this mod's changes

canvas is a skill published in the GitHub repository tboome33/obsidian-mcp-router (1 stars, last pushed today), licensed Apache-2.0. It adds 114 tokens to every session and 1,393 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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