Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/protect-my-hair/nucleus-marketplacenpx agentmods add skills/protect-my-hair/nucleus-marketplace/nucleus-contextWrote 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/nucleus-context)<a href="https://agentmods.dev/skills/protect-my-hair/nucleus-marketplace/nucleus-context"><img src="https://agentmods.dev/badge/skills/protect-my-hair/nucleus-marketplace/nucleus-context/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/nucleus-context"><img src="https://agentmods.dev/badge/skills/protect-my-hair/nucleus-marketplace/nucleus-context.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 | $0.00041 | $0.00677 |
| Opus 5 | $0.00020 | $0.00338 |
| Sonnet 5 | $0.00008 | $0.00135 |
| Haiku 4.5 | $0.00004 | $0.00068 |
Grade A, and why
nucleus-context 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 — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Nucleus Context
本 Skill 负责 Nucleus V2 baseline 的 context 入口能力。它安装在 Claude Code / Codex 等 coding agent 内部使用，不是 PMS 后端，也不是独立服务。
边界
- 只使用目标仓库
.nucleus/**作为过程产物路径。 docs/requirement/**是受保护需求事实源；本 Skill 只读引用，不正式写入。.autocode/**、.claude/notepads/**、docs/bugfix/**是 legacy risk path，命中 plannedWrites 必须阻塞。- baseline
discover只接受显式输入，不做自然语言自由解析、不深扫知识库、不伪造 PMS product/repo/run。 - 缺
workflowRunId时只能生成 local diagnostic blocked result；不得写.nucleus/context/<synthetic>.json，不得让后续 workflow 用 synthetic id 继续。
子命令
python3 skills/nucleus-context/scripts/Nucleus_context.py validate \
--repo-root <target-repo> \
--context <target-repo>/.nucleus/context/<workflowRunId>.json
python3 skills/nucleus-context/scripts/Nucleus_context.py discover \
--repo-root <target-repo> \
--mode standalone-assistant \
--workflow-run-id <workflowRunId> \
--workflow-id feature-development-prepare \
--workflow-step context-validation \
--provider codex \
--primary-feature docs/features/<path>/feature.md \
--requirement-solution docs/requirement/<req>/solution.md
python3 skills/nucleus-context/scripts/Nucleus_context.py build-blocked-result \
--repo-root <target-repo> \
--workflow-run-id <workflowRunId> \
--workflow-id feature-development-prepare \
--workflow-step context-validation \
--blocker-code SCHEMA_VALIDATION_FAILED \
--message "context 缺少必需字段"
输出
validate成功：写.nucleus/runs/<workflowRunId>/context-validation-gate.json。discover成功：写.nucleus/context/<workflowRunId>.json和.nucleus/runs/<workflowRunId>/context-discovery-report.json。- 缺 primary feature：写
.nucleus/runs/<workflowRunId>/context-candidate.json和 blocked.nucleus/runs/<workflowRunId>/result.json，不写正式 context。 - 缺
workflowRunId且 repo root 安全：写.nucleus/runs/wf-local-blocked-<timestamp>-<hash>/result.json，contextPath=null。 - repo root 不安全：stdout 输出 machine-readable blocked payload，非零退出，不写目标仓库。
失败策略
所有失败默认 ALERT_AND_BLOCK。不要用自然语言总结替代 result package。
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 · 59 lines · 41 tokens per session scan A 12c494b3c08d
nucleus-context is a skill published in the GitHub repository protect-my-hair/nucleus-marketplace (162 stars, last pushed 1mo ago), licensed MIT. It adds 41 tokens to every session and 677 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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