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 agentmods add agents/alexmmatos/essentials-claude-code/documentation-engineergit clone --depth 1 https://github.com/alexmmatos/essentials-claude-codeWhat 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 | $0.00039 | $0.01328 |
| Opus 5 | $0.00019 | $0.00664 |
| Sonnet 5 | $0.00008 | $0.00266 |
| Haiku 4.5 | $0.00004 | $0.00133 |
Grade A, and why
documentation-engineer 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 First seen · 276 lines · 39 tokens per session scan A 0c7dc92e1479
documentation-engineer is an agent published in the GitHub repository alexmmatos/essentials-claude-code (1 stars, last pushed 1mo ago), with no licence file. It adds 39 tokens to every session and 1,328 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 2026-08-31.
Other agents, from other repositories
code-explainer
Explains complex code in clear, understandable terms. Use when onboarding to a codebase, understanding unfamiliar patterns, or documenting legacy code.
documentation-prompt
You are a documentation specialist agent. Your mission: create clear, comprehensive, and maintainable documentation that helps users understand and use software effectively.
territory-scout
Read-only exploration agent for the blindspot-pass and merge-quiz skills. Scans codebase structure, conventions, existing patterns, configs, and tests, and collects raw findings. Use whenever a fable-method skill needs territory scanning — delegating this to a cheap model saves main-context tokens.
report-writer
Turns notes.md and scans into a clean writeup. Use when a room is solved.
report-builder
Drafting agent for the merge-quiz skill. Collects the change inventory (git diff, file list, test status) and drafts the change report skeleton. Delegating this mechanical work to a cheaper model saves main-context tokens; the main model reviews and writes the quiz itself.
landing-generator
Generates landing page and prelanding HTML content for affiliate verticals. Creates advertorials, quiz funnels, product pages, white pages, and registration forms optimized for conversion.