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 protect-my-hair/nucleus-marketplace --skill feature-developmentgit clone --depth 1 https://github.com/protect-my-hair/nucleus-marketplaceWrote 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/protect-my-hair/nucleus-marketplace/feature-development)<a href="https://agentmods.dev/skills/protect-my-hair/nucleus-marketplace/feature-development"><img src="https://agentmods.dev/badge/skills/protect-my-hair/nucleus-marketplace/feature-development/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/protect-my-hair/nucleus-marketplace/feature-development"><img src="https://agentmods.dev/badge/skills/protect-my-hair/nucleus-marketplace/feature-development.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 | $0.00032 | $0.02622 |
| Opus 5 | $0.00016 | $0.01311 |
| Sonnet 5 | $0.00006 | $0.00524 |
| Haiku 4.5 | $0.00003 | $0.00262 |
Grade A, and why
feature-development 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 13d 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.
How it starts
The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
特性开发
前置：使用本 Skill 前，先按
using-nucleus完成 Nucleus 入口识别（Claude Code 会话由插件 SessionStart hook 自动注入该纪律）。
核心原则
特性开发是按特性分组的 task / todo 编排，不是脚本循环，也不是一个大开发任务。
当前特性涉及 UI，且 docs/ui-design/**、Pencil 文件、ui-prototype.md 或用户明确设计稿存在时，未把相关 UI 设计源纳入实施计划、实现任务和完成评审证据前，不得写 UI 源码或把当前特性标记完成；仅发现仓库候选设计源时，未完成人工相关性确认前不得写 UI 源码。
当前特性实施计划缺少 developmentSpecs，或目标仓库 docs/specs/** 规范缺失但没有 setup gap 处理结论时，不得写源码、测试或把当前特性标记完成。
当前特性实施计划缺少 specAnchor，或上下文压缩 / 会话恢复 / 阶段切换后没有从磁盘重读 .nucleus/runs/<workflowRunId>/spec-anchor.json 及其 sourceEvidencePaths 时，不得写源码、测试、样式或请求完成评审。
未创建宿主 todo/task 任务包，不得执行 feature-doc-design、feature-development-prepare、feature-implementation、multi-review 或进入下一个特性。
每个特性设计评审、实施计划确认和特性完成评审请求发给人之前，必须先按 _shared/references/subagent-precheck-protocol.md 调度独立 reviewer 完成 subagentPreReview；未取得“材料可提交人工审查”结论时，不得请求人工评审通过。
Checklist
启动本 Skill 后，必须先为以下每一项创建宿主 todo/task，并按顺序执行；Codex 使用计划 / 任务工具，Claude Code 使用 TodoWrite 或等价宿主 todo。每完成、阻塞或等待一项，都必须逐项更新状态。.nucleus/runs/<workflowRunId>/feature-development/tasks.json 和 tasks.md 只是这些宿主任务包的镜像证据，不能替代宿主任务、设计评审、计划确认、review、整改复核或 PMS 状态。
- 读取需求设计产物：读取需求实现方案、拆解结果和
.nucleus/context/<workflowRunId>.json；不把上游评审是否文件化作为本阶段 input 阻塞。 - 读取特性拆解输入：读取
requirement-decomposition输出的特性路径、优先级、依赖和feature-doc-design输入。 - 确认需求分支：调用或执行
requirement-branch；缺分支授权时ALERT_AND_BLOCK。 - 读取现有特性树：读取目标仓库
docs/features/**既有结构，避免跨特性误写。 - 创建宿主特性任务包：为每个特性创建独立 task 包；当前特性未完成前不得开始下一个特性。
- 执行当前特性设计：调用
feature-doc-design直接写入docs/features/**待评审特性文档，先按_shared/references/subagent-precheck-protocol.md完成subagentPreReview；通过后按_shared/references/interaction-format.md的确认型格式呈现给人评审，未通过时修订设计。 - 生成并确认实施计划：设计评审通过后生成实施计划，先按
_shared/references/subagent-precheck-protocol.md完成subagentPreReview；通过后按_shared/references/interaction-format.md的确认型格式请求确认，未确认时不得写源码或测试。计划必须包含specAnchor和developmentSpecs，列出docs/specs/**规范证据、适用 rules、缺失状态、facts manifest hash、reload policy 和 setup gap 处理要求。当前特性存在相关 UI 设计源时，计划必须包含 UI 设计源发现证据、Pencil frame / UI 状态映射、公共组件 / 公共样式契约和视觉证据路径；仅发现候选设计源时，计划必须要求人工确认相关性。 - 按计划实现并验证：每个 task 写源码、测试或样式前，先重读
specAnchor.sourceEvidencePaths指向的 specs、UI 设计证据和实施计划，再补测试或测试资产，再实现当前特性覆盖内容，并运行计划声明的验证命令。若计划uiDesign.applicability=required，必须先导出或读取设计 frame，按 frame / 状态映射实现，并采集浏览器截图、人工视觉证据或等价 UI 对照证据。 - 完成多维评审：调用
multi-review做 code-review、方案一致性评审和计划满足度评审。 - 整改并复核：整改评审意见或写明不采纳理由，再完成复核。
- 收口当前特性证据：确认当前特性证据完整且无越界改动后，才允许解锁下一个特性。
What ships with it
6 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.
- 13d ago First seen · 112 lines · 32 tokens per session scan A 468f11d845ba
feature-development is a skill published in the GitHub repository protect-my-hair/nucleus-marketplace (162 stars, last pushed 1mo ago), licensed MIT. It adds 32 tokens to every session and 2,622 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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