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.
git clone --depth 1 https://github.com/d-padmanabhan/agent-engineering-handbookWrote 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/commands/d-padmanabhan/agent-engineering-handbook/markdown)<a href="https://agentmods.dev/commands/d-padmanabhan/agent-engineering-handbook/markdown"><img src="https://agentmods.dev/badge/commands/d-padmanabhan/agent-engineering-handbook/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/commands/d-padmanabhan/agent-engineering-handbook/markdown"><img src="https://agentmods.dev/badge/commands/d-padmanabhan/agent-engineering-handbook/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 | $0.00015 | $0.00387 |
| Opus 5.5 | $0.00006 | $0.00155 |
| Sonnet 5.5 | $0.00003 | $0.00077 |
| Haiku 4.5 | $0.00002 | $0.00039 |
Grade A, and why
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 2mo 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 MODE ACTIVATED
You are now in MARKDOWN MODE. Any work on Markdown MUST follow:
rules/800-markdown.mdc(alerts, Mermaid, structure)rules/100-core.mdc(concise, non-sloppy, useful docs)- (When relevant)
rules/810-documentation.mdc
Use this command when the user asks to:
- Write new Markdown docs (README, guides, runbooks)
- Modify existing Markdown
- Review Markdown for structure and clarity
Guardrails (mandatory)
- Prefer clarity and structure; avoid filler.
- Use GitHub alerts (
[!NOTE],[!TIP], etc.) where they add value. - Use Mermaid for flows/diagrams when it improves understanding.
- Avoid emojis in professional docs unless explicitly requested.
Step 0: Determine intent (create vs modify vs review)
Infer intent from the user’s request. If ambiguous, ask ≤3 clarifying questions (target audience, required sections, depth).
Create
Produce Markdown that:
- Has a clear title and logical headings
- Includes ToC when multi-section
- Uses consistent formatting and examples
Modify
- Minimal diffs
- Preserve existing doc style unless asked to change it
Review
Prioritize:
- Critical: incorrect instructions, unsafe guidance, missing warnings for destructive actions
- Recommended: structure, navigation, missing examples, unclear steps
- Optional: wording and minor formatting polish
Verification (as applicable):
pre-commit run --all-files
Done condition
End with:
- Files changed (or “no changes made”)
- How to validate/preview (rendering, lint) and what the doc now supports
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.
- 2mo ago First seen · 63 lines · 15 tokens per session scan A ccf305cd0008
markdown is a command published in the GitHub repository d-padmanabhan/agent-engineering-handbook (20 stars, last pushed yesterday), licensed MIT. It adds 15 tokens to every session and 387 once invoked, about $0.0001 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.
markdown compared with commands from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| markdownd-padmanabhan/agent-engineering-handbook | Command | 20 | yesterday | MIT | A | 15 | Claude Code |
| checklistgithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| clarifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 27 | Claude Code |
| specifygithub/spec-kit | Command | 148k | yesterday | MIT | A | 13 | Claude Code |
| analyzegithub/spec-kit | Command | 148k | yesterday | MIT | A | 26 | Claude Code |
| convergegithub/spec-kit | Command | 148k | yesterday | MIT | A | 35 | Claude Code |
| implementgithub/spec-kit | Command | 148k | yesterday | MIT | A | 14 | Claude Code |