zettelkasten-note

zettelkasten-note is a skill for Claude Code, Codex from treylom/knowledge-manager. It costs 16 tokens per session (408 once invoked), scanned A, original, MIT.

A method for writing small, self-contained notes that each cover one idea and link to related notes. Zettelkasten is a note-taking system designed to build a connected knowledge base over time.

In plain words
What is it for?
Use it to create concept notes, add tags and sources, and connect related research or documentation with wiki links.
Why use it?
It prevents large, hard-to-navigate notes and preserves the context and relationships between ideas.

Skill for Claude CodeCodex

Part of the km plugin — 10 skills, 10 commands, 2 agents shipped together

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.

agentmods
npx agentmods add skills/treylom/knowledge-manager/zettelkasten-note
Any agent
npx skills add treylom/knowledge-manager --skill zettelkasten-note
Clone the repo
git clone --depth 1 https://github.com/treylom/knowledge-manager

Made for: Claude Code, Codex.

Or install km, the plugin that ships this one along with the rest of its 10 skills, 10 commands, 2 agents.

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 zettelkasten-note

README.md
[![agentmods](https://agentmods.dev/badge/skills/treylom/knowledge-manager/zettelkasten-note.svg)](https://agentmods.dev/skills/treylom/knowledge-manager/zettelkasten-note)
Your own site
<a href="https://agentmods.dev/skills/treylom/knowledge-manager/zettelkasten-note"><img src="https://agentmods.dev/badge/skills/treylom/knowledge-manager/zettelkasten-note.svg" alt="Measured on agentmods" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 408 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00016 $0.00408
Opus 5 $0.00008 $0.00204
Sonnet 5 $0.00003 $0.00082
Haiku 4.5 $0.00002 $0.00041

Measured 3d ago against content hash 11e32c5b06c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

zettelkasten-note 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 3d 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.

.agent/skills/zettelkasten-note/SKILL.md · 97 lines

What it actually says

Zettelkasten Note Creation

Create atomic, self-contained, interconnected notes


Core Principles

1. Atomicity

  • One idea per note
  • If you can split it, split it
  • Note should be about ONE concept

2. Self-Contained

  • Note must be understandable without context
  • Include enough background information
  • Reader shouldn't need to read other notes first

3. Connectivity

  • Link to related notes with [[wikilinks]]
  • Explain the relationship in the link
  • Build a knowledge network

Note Structure

---
tags: [{domain}, {topic}, {type}]
created: {YYYY-MM-DD}
source: {url_or_reference}
type: zettelkasten
---

# {Concept Name}

> {One-sentence definition or summary}

## Explanation

{2-3 paragraphs explaining the concept}
{Include examples if helpful}

## Key Characteristics

- Characteristic 1
- Characteristic 2
- Characteristic 3

## Connections

- [[Related Concept A]] - {how they relate}
- [[Related Concept B]] - {how they relate}
- [[Contrasting Concept]] - {how they differ}

## Examples

{Concrete examples or applications}

## Source

- {Original source with link}

Folder Organization

Vault/
├── Zettelkasten/
│   ├── AI-Research/
│   ├── Programming/
│   └── Productivity/
├── Research/
│   └── Papers/
├── Threads/
└── Inbox/

Naming Convention

{Topic} - {Specific Concept}.md

Examples:

  • MCP - Protocol Overview.md
  • Zettelkasten - Atomicity Principle.md
  • Claude Code - Hooks System.md
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. 3d ago First seen · 97 lines · 16 tokens per session scan A 11e32c5b06c6

Subscribe to this mod's changes

zettelkasten-note is a skill published in the GitHub repository treylom/knowledge-manager (230 stars, last pushed today), licensed MIT. It adds 16 tokens to every session and 408 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 2026-09-01.

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