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.
npx skills add sethyuan/orcanote-agent-skills --skill orcanote-markdowngit clone --depth 1 https://github.com/sethyuan/orcanote-agent-skillsWrote 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.
[](https://agentmods.dev/skills/sethyuan/orcanote-agent-skills/orcanote-markdown)<a href="https://agentmods.dev/skills/sethyuan/orcanote-agent-skills/orcanote-markdown"><img src="https://agentmods.dev/badge/skills/sethyuan/orcanote-agent-skills/orcanote-markdown/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.
<a href="https://agentmods.dev/skills/sethyuan/orcanote-agent-skills/orcanote-markdown"><img src="https://agentmods.dev/badge/skills/sethyuan/orcanote-agent-skills/orcanote-markdown.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00112 | $0.02360 |
| Opus 5.5 | $0.00045 | $0.00944 |
| Sonnet 5.5 | $0.00022 | $0.00472 |
| Haiku 4.5 | $0.00011 | $0.00236 |
Grade A, and why
orcanote-markdown 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 380 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Orca Note Flavored Markdown Skill
This skill enables skills-compatible agents to create and edit valid Orca Note Flavored Markdown, including all Orca Note-specific syntax extensions.
Overview
Orca Note uses a combination of Markdown flavors:
- CommonMark
- GitHub Flavored Markdown
- LaTeX for math
- Orca Note-specific extensions (auto headings, highlights, callouts, etc.)
Basic Formatting
Paragraphs and Line Breaks
This is a paragraph.
This is another paragraph (blank line between creates separate paragraphs).
One paragraph = one line. A blank line starts a new block.
A soft break (two consecutive lines without a blank line) is merged into a single block, with the two lines joined by a space. That no longer splits one paragraph into two blocks, but for CJK text it inserts a space in the middle of the sentence — so still write one paragraph per line. (Verified by reading the created block back; the earlier "two lines become two blocks" behaviour is gone.)
Headings
# Heading 1
## Heading 2
### Heading 3
#### Heading 4
Maximum heading level is 4 (####).
Text Formatting
| Style | Syntax | Example | Output |
|---|---|---|---|
| Bold | **text** or __text__ |
**Bold** |
Bold |
| Italic | *text* or _text_ |
*Italic* |
Italic |
| Bold + Italic | ***text*** |
***Both*** |
Both |
| Strikethrough | ~~text~~ |
~~Striked~~ |
|
| Highlight | ==text== |
==Highlighted== |
==Highlighted== |
| Inline code | `code` |
`code` |
code |
Escaping Formatting
Use backslash to escape special characters:
\*This won't be italic\*
\#This won't be a heading
1\. This won't be a list item
Common characters to escape: \*, \_, \#, \`, \|, \~
Link to Blocks
[[BlockID]]
[[Block Alias]]
Block ID is a number.
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.
- yesterday Changed · +70 lines · +36 tokens per session 05b0602aef5b
- 26d ago Changed · -5 lines 9f8ff9c861ea
- 2mo ago First seen · 315 lines · 76 tokens per session scan A 88132dec90f4
orcanote-markdown is a skill published in the GitHub repository sethyuan/orcanote-agent-skills (5 stars, last pushed 2d ago), licensed MIT. It adds 112 tokens to every session and 2,360 once invoked, about $0.0004 per session on Opus 5.5. 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.
orcanote-markdown compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| orcanote-markdownsethyuan/orcanote-agent-skills | Skill | 5 | 2d ago | MIT | A | 112 | Claude Code, Codex |
| imagegenopenai/codex | Skill | 134k | today | Apache-2.0 | A | 113 | Codex |
| playwright-climicrosoft/playwright | Skill | 99k | today | Apache-2.0 | A | 19 | Claude Code |
| local-ai-agentsmicrosoft/ai-agents-for-beginners | Skill | 79k | today | MIT | A | 200 | Claude Code, Codex |
| systematic-debuggingobra/superpowers | Skill | 314k | 3d ago | MIT | A | 21 | Claude Code |
| next-cache-components-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 95 | Claude Code |
| next-partial-prefetching-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 103 | Claude Code |