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 aj-geddes/useful-ai-prompts --skill markdown-documentationgit clone --depth 1 https://github.com/aj-geddes/useful-ai-promptsWrote 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/aj-geddes/useful-ai-prompts/markdown-documentation)<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/markdown-documentation"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/markdown-documentation/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/aj-geddes/useful-ai-prompts/markdown-documentation"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/markdown-documentation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00035 | $0.00550 |
| Opus 5 | $0.00017 | $0.00275 |
| Sonnet 5 | $0.00007 | $0.00110 |
| Haiku 4.5 | $0.00003 | $0.00055 |
Grade A, and why
markdown-documentation 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Markdown Documentation
Table of Contents
Overview
Master markdown syntax and best practices for creating well-formatted, readable documentation using standard Markdown and GitHub Flavored Markdown (GFM).
When to Use
- README files
- Documentation pages
- GitHub/GitLab wikis
- Blog posts
- Technical writing
- Project documentation
- Comment formatting
Quick Start
- Comment formatting
# H1 Header
## H2 Header
### H3 Header
#### H4 Header
##### H5 Header
###### H6 Header
# Alternative H1
## Alternative H2
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| Text Formatting | Text Formatting |
| Lists | Lists |
| Links and Images | Links and Images, Code Blocks, Tables |
| Extended Syntax (GitHub Flavored Markdown) | Extended Syntax (GitHub Flavored Markdown) |
| Collapsible Sections | Collapsible Sections, Syntax Highlighting, Badges |
| Alerts and Callouts | Alerts and Callouts |
| Mermaid Diagrams | Mermaid Diagrams |
Best Practices
✅ DO
- Use descriptive link text
- Include table of contents for long documents
- Add alt text to images
- Use code blocks with language specification
- Keep lines under 80-100 characters
- Use relative links for internal docs
- Add badges for build status, coverage, etc.
- Include examples and screenshots
- Use semantic line breaks
- Test all links regularly
❌ DON'T
- Use "click here" as link text
- Forget alt text on images
- Mix HTML and Markdown unnecessarily
- Use absolute paths for local files
- Create walls of text without breaks
- Skip language specification in code blocks
- Use images for text content (accessibility)
What ships with it
8 files 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.
- references/alerts-and-callouts.md 377 B
- references/collapsible-sections.md 873 B
- references/extended-syntax-github-flavored-markdown.md 529 B
- references/links-and-images.md 1.1 KB
- references/lists.md 393 B
- references/mermaid-diagrams.md 338 B
- references/text-formatting.md 289 B
- templates/doc-template.md 374 B
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.
- 9d ago First seen · 93 lines · 35 tokens per session scan A 663ac3b9704e
markdown-documentation is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (338 stars, last pushed 6mo ago), licensed MIT. It adds 35 tokens to every session and 550 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 2026-09-03.
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