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 cafe3310/public-agent-skills --skill prd-writergit clone --depth 1 https://github.com/cafe3310/public-agent-skillsWrote 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/cafe3310/public-agent-skills/prd-writer)<a href="https://agentmods.dev/skills/cafe3310/public-agent-skills/prd-writer"><img src="https://agentmods.dev/badge/skills/cafe3310/public-agent-skills/prd-writer/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/skills/cafe3310/public-agent-skills/prd-writer"><img src="https://agentmods.dev/badge/skills/cafe3310/public-agent-skills/prd-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00045 | $0.00881 |
| Opus 5 | $0.00023 | $0.00441 |
| Sonnet 5 | $0.00009 | $0.00176 |
| Haiku 4.5 | $0.00005 | $0.00088 |
Grade A, and why
prd-writer 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 12d 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
PRD Writer Skill (产品需求文档撰写)
本 Skill 的核心目标是协助用户，将一个初步的产品构想或迭代需求，系统化地发展成一份完整的、符合业界标准的、可直接用于研发团队排期的产品需求文档（PRD）。
Agent 在此流程中扮演着商业分析师和产品经理的角色，通过一系列结构化的步骤，主动引导对话、澄清需求、对齐认知，并最终完成文档的撰写。
何时使用
当用户提出以下类型的需求时，应激活此 Skill：
- “帮我为一个新项目/产品写一份 PRD。”
- “我们准备开发XX功能的下一版，我们一起梳理一下需求。”
- “我有一些关于XX产品的想法，你能帮我把它变成一个更具体的计划吗？”
- “我们来规划一下下个季度的产品功能。”
核心工作流
本 Skill 的工作流程被定义在 references/workflow-and-best-practices.md 文件中。在开始任务前，必须首先阅读并严格遵循该文档中定义的 7 步工作流。
工作流摘要
- 收集项目信息：通过搜索，建立对项目的全面上下文认知。
- 筛选高阶背景与现状：提炼项目愿景、路线图和当前状态。
- 生成“现状分析”文档：与用户确认对项目背景的共同理解。
- 获取用户洞察：引导用户提供对下一迭代的具体需求和想法。
- 分析、对齐并生成“迭代分析”文档：评估新需求，并制定前进计划。
- 识别参考资料并选择模板：准备撰写 PRD 所需的所有材料。
- 起草 PRD：综合所有信息，生成最终的 PRD 文档。
可用资产 (Assets)
本 Skill 提供了一个标准的 PRD 模板，以确保产出文档的专业性和完整性。
- 路径:
assets/PRD-Template.md - 用途:
- 当项目中不存在可供参考的、高质量的旧版本 PRD 时，应使用此模板作为新 PRD 的基础。
- 在工作流的第 6 步中，根据情况决定是使用此模板还是参考项目中的现有文档。
操作指南
- 启动：在任务开始时，向用户确认你将使用
prd-writerSkill，并简要说明你将遵循一个结构化的流程来合作。 - 遵循工作流：严格按照
references/workflow-and-best-practices.md中定义的步骤推进。不要跳过任何一步，尤其是与用户确认和对齐的步骤（第 3、4、5 步）。 - 使用工具：熟练运用
search_file_content、glob、read_file和write_file工具来完成信息收集、分析和文档撰写。 - 产出文档：流程中的每一步都应有明确的文档产出（现状分析、迭代分析、最终的 PRD）。确保所有产出的文档都遵循用户的命名和存储习惯。
- 完成：在生成最终的 PRD 草稿后，将其交付给用户，并告知用户可以对其进行最后的审阅和修改。任务至此完成。
What ships with it
2 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.
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.
- 12d ago First seen · 52 lines · 45 tokens per session scan A 5964b1d09f6e
prd-writer is a skill published in the GitHub repository cafe3310/public-agent-skills (253 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 45 tokens to every session and 881 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 2026-08-30.
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