obsidian-output-format

obsidian-output-format is a skill for Claude Code, Codex from Lapis0x0/obsidian-yolo. It costs 36 tokens per session (312 once invoked), scanned A, original, MIT.

A formatting rule for returning Obsidian markdown content, including tags and a special edit-block format. Obsidian is a note-taking application that stores notes as Markdown files.

In plain words
What is it for?
Use it whenever returning Markdown content, suggesting changes to an existing Markdown file, or referencing Markdown snippets.
Why use it?
It makes proposed Markdown edits precise and easier to apply without replacing unrelated parts of a note.

Skill for Claude CodeCodex

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

Good fit Use it whenever returning Markdown content, suggesting changes to an existing Markdown file, or referencing Markdown snippets.

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Install with agentmods
npx agentmods add skills/lapis0x0/obsidian-yolo/obsidian-output-format
About the project

Obsidian YOLO is an AI assistant integrated with Obsidian for chatting, writing, learning, and managing a knowledge base. It is for people who use Obsidian as a workspace for notes and personal knowledge. Catalogue add-ons provide related assistant capabilities.

Lapis0x0/obsidian-yolo · 1,341 stars · on GitHub

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 Lapis0x0/obsidian-yolo --skill obsidian-output-format
Clone the repo
git clone --depth 1 https://github.com/Lapis0x0/obsidian-yolo

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 obsidian-output-format

README.md
[![agentmods](https://agentmods.dev/badge/skills/lapis0x0/obsidian-yolo/obsidian-output-format/github.svg)](https://agentmods.dev/skills/lapis0x0/obsidian-yolo/obsidian-output-format)
Your own site
<a href="https://agentmods.dev/skills/lapis0x0/obsidian-yolo/obsidian-output-format"><img src="https://agentmods.dev/badge/skills/lapis0x0/obsidian-yolo/obsidian-output-format/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 obsidian-output-format

Your own site · 80×15
<a href="https://agentmods.dev/skills/lapis0x0/obsidian-yolo/obsidian-output-format"><img src="https://agentmods.dev/badge/skills/lapis0x0/obsidian-yolo/obsidian-output-format.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 312 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00036 $0.00312
Opus 5 $0.00018 $0.00156
Sonnet 5 $0.00007 $0.00062
Haiku 4.5 $0.00004 $0.00031

Measured 11d ago against content hash 9042c6c9e1ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

obsidian-output-format 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 11d 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.

src/core/skills/builtin/obsidian-output-format/SKILL.md · 44 lines

What it actually says

Obsidian Output Format

Use <yolo_block> only when proposing edits to an existing markdown file.

Rules

  1. Output exactly one <yolo_block> when proposing file edits.
  2. Inside <yolo_block>, output one edit block only.
  3. The <yolo_block> block does not require any code block wrapping.

Format(REPLACE)

Normal output text before the <yolo_block> block. <yolo_block filename="path/to/file.md"> <<<<<<< REPLACE [old] exact old text

[new] new text

END </yolo_block> Normal output text after the <yolo_block> block.

Allowed operation types:

  1. REPLACE for replacement
  2. INSERT_AFTER for insertion after an anchor
  3. APPEND for appending to the end

Operation Rules

  • Keep [old] or [anchor] minimal but uniquely matchable.
  • Preserve exact markdown source in [old], including whitespace and punctuation.
  • The APPEND operation only requires outputting the New text; there is no need to output [old] and exact old text
  • Each <yolo_block> must contain exactly one operation.
  • Do not dump the full file unless explicitly requested.
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. 11d ago First seen · 44 lines · 36 tokens per session scan A 9042c6c9e1ec

Subscribe to this mod's changes

obsidian-output-format is a skill published in the GitHub repository Lapis0x0/obsidian-yolo (1,341 stars, last pushed yesterday), licensed MIT. It adds 36 tokens to every session and 312 once invoked, about $0.0002 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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