json-canvas

json-canvas is a skill for Claude Code, Codex from OneMore07/NoteFlowOS. It costs 18 tokens per session (77 once invoked), scanned A, original, MIT.

A file editor for JSON Canvas, the format used by Obsidian for visual boards. These boards can arrange notes, links, groups, and connections on a canvas.

In plain words
What is it for?
Use it to build or edit mind maps, flowcharts, and other visual arrangements involving nodes, edges, groups, file references, and external links.
Why use it?
It helps create and maintain valid canvas files without manually managing their underlying JSON structure.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to build or edit mind maps, flowcharts, and other visual arrangements involving nodes, edges, groups, file references, and external links.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/onemore07/noteflowos/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 OneMore07/NoteFlowOS --skill json-canvas
Clone the repo
git clone --depth 1 https://github.com/OneMore07/NoteFlowOS

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/onemore07/noteflowos/json-canvas.svg)](https://agentmods.dev/skills/onemore07/noteflowos/json-canvas)
Your own site
<a href="https://agentmods.dev/skills/onemore07/noteflowos/json-canvas"><img src="https://agentmods.dev/badge/skills/onemore07/noteflowos/json-canvas.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 77 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 $0.00018 $0.00077
Opus 5 $0.00009 $0.00039
Sonnet 5 $0.00004 $0.00015
Haiku 4.5 $0.00002 $0.00008

Measured 7d ago against content hash cf0be6bb2db4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, 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 7d 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/json-canvas/SKILL.md · 18 lines

What it actually says

JSON Canvas

用于创建和编辑 Obsidian 的 .canvas 文件。

重点支持:

  • nodes
  • edges
  • groups
  • file references
  • external links

适用于思维导图、流程图和视觉结构整理场景。

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. 7d ago First seen · 18 lines · 18 tokens per session scan A cf0be6bb2db4

Subscribe to this mod's changes

json-canvas is a skill published in the GitHub repository OneMore07/NoteFlowOS (10 stars, last pushed 3mo ago), licensed MIT. It adds 18 tokens to every session and 77 once invoked, about $0.0001 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 2026-08-31.

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