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 skills/fusengine/agents/prompt-librarynpx skills add fusengine/agents --skill prompt-librarygit clone --depth 1 https://github.com/fusengine/agentsWrote 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/fusengine/agents/prompt-library)<a href="https://agentmods.dev/skills/fusengine/agents/prompt-library"><img src="https://agentmods.dev/badge/skills/fusengine/agents/prompt-library.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 | $0.00034 | $0.01167 |
| Opus 5 | $0.00017 | $0.00583 |
| Sonnet 5 | $0.00007 | $0.00233 |
| Haiku 4.5 | $0.00003 | $0.00117 |
Grade A, and why
prompt-library 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.
How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
It covers listing, searching, viewing, and using/customizing an existing template -- not designing a new agent architecture from scratch (see agent-design for that) or writing a prompt's internal structure (see prompt-creation).
Prompt Library
Collection of professional, tested, and optimized prompt templates.
Categories
Agents (6 executable agents)
| Template | Description | Usage |
|---|---|---|
| code-reviewer | Code review with SOLID | /prompt library use code-reviewer |
| support-assistant | Multichannel customer support | /prompt library use support-assistant |
| data-analyst | Data analysis | /prompt library use data-analyst |
| technical-writer | Technical documentation | /prompt library use technical-writer |
| security-auditor | OWASP security audit | /prompt library use security-auditor |
| api-designer | REST/GraphQL API design | /prompt library use api-designer |
Tasks (6 executable agents)
| Template | Description | Usage |
|---|---|---|
| summarizer | Adaptive text summarization | /prompt library use summarizer |
| translator | Multilingual translation | /prompt library use translator |
| extractor | Structured data extraction | /prompt library use extractor |
| classifier | Content classification | /prompt library use classifier |
| generator | Content generation | /prompt library use generator |
| validator | Data validation | /prompt library use validator |
What ships with it
18 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.
- templates/agents/api-designer.md 3.1 KB
- templates/agents/code-reviewer.md 2.9 KB
- templates/agents/data-analyst.md 2.7 KB
- templates/agents/security-auditor.md 3.2 KB
- templates/agents/support-assistant.md 2.9 KB
- templates/agents/technical-writer.md 3.0 KB
- templates/specialized/educational-tutor.md 2.2 KB
- templates/specialized/financial-analyst.md 1.9 KB
- templates/specialized/hr-assistant.md 1.9 KB
- templates/specialized/legal-assistant.md 1.9 KB
- templates/specialized/marketing-strategist.md 2.1 KB
- templates/specialized/medical-writer.md 2.2 KB
- templates/tasks/classifier.md 1.5 KB
- templates/tasks/extractor.md 1.5 KB
- templates/tasks/generator.md 1.4 KB
- templates/tasks/summarizer.md 1.3 KB
- templates/tasks/translator.md 1.4 KB
- templates/tasks/validator.md 1.7 KB
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 · 113 lines · 34 tokens per session scan A 61526c9404b4
prompt-library is a skill published in the GitHub repository fusengine/agents (25 stars, last pushed today), licensed MIT. It adds 34 tokens to every session and 1,167 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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