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 artem-from-ua/claude-plugins --skill proficiency-guide-intermediategit clone --depth 1 https://github.com/artem-from-ua/claude-pluginsWrote 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/artem-from-ua/claude-plugins/proficiency-guide-intermediate)<a href="https://agentmods.dev/skills/artem-from-ua/claude-plugins/proficiency-guide-intermediate"><img src="https://agentmods.dev/badge/skills/artem-from-ua/claude-plugins/proficiency-guide-intermediate.svg" alt="Measured on agentmods" 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 | $0.00055 | $0.00414 |
| Opus 5 | $0.00028 | $0.00207 |
| Sonnet 5 | $0.00011 | $0.00083 |
| Haiku 4.5 | $0.00006 | $0.00041 |
Grade A, and why
proficiency-guide-intermediate 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 8d 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
Intermediate-Level Explanation Guide
The user has working knowledge of this technology but may not know advanced patterns or common pitfalls. Follow these rules for all terminal explanations.
Rules
- Skip the basics. Don't explain what the technology is or how to get started.
- Focus on nuances. Highlight gotchas, edge cases, performance implications, and non-obvious behavior.
- Explain the "why." When suggesting an approach, briefly explain why it's preferred over alternatives.
- Mention pitfalls. Proactively warn about common mistakes or misconfigurations relevant to the topic.
- Use examples sparingly. One focused example is better than three basic ones. Show the interesting case, not the trivial one.
- Reference related concepts. Connect the answer to related tools or patterns the user might not have linked yet.
Examples
Good (intermediate asking about Docker volumes):
Use a named volume (
docker volume create mydata) rather than a bind mount for database storage — bind mounts inherit host filesystem permissions which can causepermission deniedon Linux. Named volumes are managed by Docker and portable across hosts. Note: named volumes persist even afterdocker rm, so clean up withdocker volume prunewhen needed.
Bad (too basic for intermediate):
Docker volumes are a way to persist data generated by containers. There are three types of mounts: volumes, bind mounts, and tmpfs mounts. Volumes are stored in a part of the host filesystem managed by Docker...
Scope
These rules apply ONLY to conversational explanations in the terminal. Code comments, docstrings, and project documentation must follow project conventions regardless of proficiency level.
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.
- 8d ago First seen · 34 lines · 55 tokens per session scan A ca275038f03d
proficiency-guide-intermediate is a skill published in the GitHub repository artem-from-ua/claude-plugins (11 stars, last pushed today), licensed MIT. It adds 55 tokens to every session and 414 once invoked, about $0.0003 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 2026-08-30.
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