json-canvas

json-canvas is a skill for Claude Code, Codex from lunchpaillola/lola-opencode. It costs 54 tokens per session (2,272 once invoked), scanned A, original, no licence file.

A way to create and edit JSON Canvas files, which describe visual diagrams using boxes, lines, groups, and connections.

In plain words
What is it for?
Use it to make mind maps, flowcharts, and other visual canvases, including Canvas files used by Obsidian, a note-taking app.
Why use it?
It removes the need to manually write the file structure for diagrams and visual layouts.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to make mind maps, flowcharts, and other visual canvases, including Canvas files used by Obsidian, a note-taking app.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lunchpaillola/lola-opencode/obsidian-json-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 lunchpaillola/lola-opencode --skill obsidian-json-canvas
Clone the repo
git clone --depth 1 https://github.com/lunchpaillola/lola-opencode

Made for: Claude Code, Codex.

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 json-canvas

README.md
[![agentmods](https://agentmods.dev/badge/skills/lunchpaillola/lola-opencode/obsidian-json-canvas/github.svg)](https://agentmods.dev/skills/lunchpaillola/lola-opencode/obsidian-json-canvas)
Your own site
<a href="https://agentmods.dev/skills/lunchpaillola/lola-opencode/obsidian-json-canvas"><img src="https://agentmods.dev/badge/skills/lunchpaillola/lola-opencode/obsidian-json-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 json-canvas

Your own site · 80×15
<a href="https://agentmods.dev/skills/lunchpaillola/lola-opencode/obsidian-json-canvas"><img src="https://agentmods.dev/badge/skills/lunchpaillola/lola-opencode/obsidian-json-canvas.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,272 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 unknown 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 $0.00054 $0.02272
Opus 5 $0.00027 $0.01136
Sonnet 5 $0.00011 $0.00454
Haiku 4.5 $0.00005 $0.00227

Measured 10d ago against content hash efaa2f484b84, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

json-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 10d 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/obsidian-json-canvas/SKILL.md · 248 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 10d ago First seen · 248 lines · 54 tokens per session scan A efaa2f484b84

Subscribe to this mod's changes

json-canvas is a skill published in the GitHub repository lunchpaillola/lola-opencode (23 stars, last pushed yesterday), with no licence file. It adds 54 tokens to every session and 2,272 once invoked, about $0.0003 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 2026-08-30.

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