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mcp/skillhub

Agent Skill

JSON Canvas skill

json-canvaskepano/obsidian-skillsskills/json-canvas/SKILL.md

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.

50kMIT

always on

54 tokname + description

once used

2,165 tokSKILL.md body

bundled files

16 KB

installs

74kskills.sh

Install the JSON Canvas skill

Skills CLI (Claude Code, Codex, Cursor and others)

npx skills add https://github.com/kepano/obsidian-skills --skill json-canvas

Claude Code, by hand (all projects)

git clone --depth 1 https://github.com/kepano/obsidian-skills.git /tmp/obsidian-skills
mkdir -p ~/.claude/skills
cp -R /tmp/obsidian-skills/skills/json-canvas ~/.claude/skills/json-canvas

For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.

What it costs your context

Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.

WhenWhat loadsCost
Every sessionName and description54 tok
When the agent uses itThe SKILL.md instructions2,165 tok
Only if opened1 bundled files (6 KB)varies

Until it is used, json-canvas costs about 25× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 6 skills from kepano/obsidian-skills would load 355 tokens of descriptions. Skills vs MCP study

Checks

Our checks found nothing to flag: it follows the Agent Skills specification's naming and size guidelines and doesn't pipe downloads into a shell.

Checked 2026-10-22 · method

What's inside

The headings of its SKILL.md. Read the full file on GitHub.

  • JSON Canvas Skill
  • File Structure
  • Common Workflows
  • 1. Create a New Canvas
  • 2. Add a Node to an Existing Canvas
  • 3. Connect Two Nodes
  • 4. Edit an Existing Canvas
  • Nodes
  • Generic Node Attributes
  • Text Nodes
  • File Nodes
  • Link Nodes
  • Group Nodes
  • Edges
  • Colors
  • ID Generation
  • Layout Guidelines
  • Validation Checklist
  • Complete Examples
  • References

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