Borrowing it
Nothing to install: this file belongs to jonathan-vella/apex-accelerator. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/jonathan-vella/apex-accelerator/main/.github/instructions/markdown.instructions.mdgit clone --depth 1 https://github.com/jonathan-vella/apex-acceleratorWrote 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/instructions/jonathan-vella/apex-accelerator/markdown)<a href="https://agentmods.dev/instructions/jonathan-vella/apex-accelerator/markdown"><img src="https://agentmods.dev/badge/instructions/jonathan-vella/apex-accelerator/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/instructions/jonathan-vella/apex-accelerator/markdown"><img src="https://agentmods.dev/badge/instructions/jonathan-vella/apex-accelerator/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 | $0.00462 | $0.00462 |
| Opus 5.5 | $0.00185 | $0.00185 |
| Sonnet 5.5 | $0.00092 | $0.00092 |
| Haiku 4.5 | $0.00046 | $0.00046 |
Grade A, and why
apex-accelerator markdown.instructions.md 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 6d 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.
What it actually says
Markdown Documentation Standards
Rules
- For paths selected by
.markdownlint-cli2.jsonc, MD013 uses 120-character lines; code blocks, tables and configured ignores are exempt. Break ordinary prose after punctuation or before links; do not claim this check covers ignored artifacts or skills. - Use an H1 document title where appropriate, then ATX
##/###sections. Artifact templates own their exact heading structure, including required H1 titles. -for unordered lists,1.for ordered; single blank lines; LF line endings.- Fenced code blocks always name a language — never bare fences.
- Descriptive link text (never "click here"); relative paths for internal links.
- Meaningful alt text for images; tables include a header row.
Diagram Embeds
Use the appropriate diagram skill for each output type:
- Architecture diagrams →
apex-python-diagramsskill (.py,.png,.svg) - WAF/cost/compliance charts →
apex-python-diagramsskill (.py+.png) - Inline markdown diagrams →
apex-mermaidskill (fenced code blocks)
Published documentation standards live in
jonathan-vella/apex-docs. For agent-generated artifacts inagent-output/**, follow azure-artifacts.instructions.md. Markdownlint excludes those artifacts and skill content. Git artifact validation checks its supported structural contract, not general line length or all template styling.
Validation
npm run lint:md
Good/bad examples: .github/instructions/references/markdown-formatting-guide.md.
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.
- 6d ago Changed · +4 lines · +47 tokens per session da49b822e1e8
- 1mo ago Changed · -33 lines · -298 tokens per session 5a15b97bc62e
- 1mo ago Changed · -12 tokens per session 77b34fee42ba
- 1mo ago Changed · -2 lines · -21 tokens per session c8bc9fd5e696
- 1mo ago First seen · 72 lines · 746 tokens per session scan A 949d3cebc63d
apex-accelerator markdown.instructions.md is an instructions file published in the GitHub repository jonathan-vella/apex-accelerator (50 stars, last pushed yesterday), licensed MIT. It adds 462 tokens to every session, about $0.0018 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 2026-08-30.
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