spherse-create-skill

spherse-create-skill is a skill for Claude Code, Codex from mengrru/Spherse. It costs 42 tokens per session (1,538 once invoked), scanned A, original, MIT.

A guide for creating reusable instructions, called skills, for coding agents. It explains where project-wide and agent-specific skills belong and how to structure them.

In plain words
What is it for?
Use it to create custom skills, choose their scope, define their directory structure, and write their required instruction files.
Why use it?
It provides a consistent way to package repeatable rules, knowledge, and workflows without mixing them into every request.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to create custom skills, choose their scope, define their directory structure, and write their required instruction files.

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Install with agentmods
npx agentmods add skills/mengrru/spherse/spherse-create-skill
Install

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.

Any agent
npx skills add mengrru/Spherse --skill spherse-create-skill
Clone the repo
git clone --depth 1 https://github.com/mengrru/Spherse

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for spherse-create-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/mengrru/spherse/spherse-create-skill/github.svg)](https://agentmods.dev/skills/mengrru/spherse/spherse-create-skill)
Your own site
<a href="https://agentmods.dev/skills/mengrru/spherse/spherse-create-skill"><img src="https://agentmods.dev/badge/skills/mengrru/spherse/spherse-create-skill/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.

agentmods 80×15 button for spherse-create-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/mengrru/spherse/spherse-create-skill"><img src="https://agentmods.dev/badge/skills/mengrru/spherse/spherse-create-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,538 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.01538
Opus 5 $0.00021 $0.00769
Sonnet 5 $0.00008 $0.00308
Haiku 4.5 $0.00004 $0.00154

Measured 10d ago against content hash bbff7c7030f3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

spherse-create-skill 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 10d 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.

packages/presets/skills/spherse-create-skill/SKILL.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

创建自定义 Skill

Skill 是一段可被 agent 通过 load_skill 工具按需加载的指令(instructions)。你可以创建自己的 skill,将常用的写作规范、领域知识、工作流程封装成可复用的指令包。

Skill 的两个层级

Skill 按作用范围分为两个层级:

层级 目录路径 作用范围
Project-level .spherse/skills/{skill-name}/ 项目内所有 agent 共享
Agent-level .spherse/agents/{agent-slug}/skills/{skill-name}/ 仅该 agent 私有

如何选择

  • Project-level:适用于所有 agent 都应遵循的通用规范(如世界观术语表、项目写作风格、文件命名约定)。
  • Agent-level:适用于某个 agent 专属的工作方式(如某个角色扮演 agent 的对话风格、某个助手 agent 的特定输出格式)。Agent-level skill 放在该 agent 自己的目录下,不污染其它 agent 的 skill 列表。
  • 项目根目录的 .agents/skills/{skill-name}/ 也会作为 project-level 兼容目录被载入。已有项目可以直接复用该目录;新建 Skill 时仍优先写入 .spherse/skills,因为 Skill Panel、安装与市场更新只管理这个主目录。

优先级

同名 skill 的优先级为 agent-level > .spherse/skills > .agents/skills > builtin。

如何获取 agent slug

创建 agent-level skill 时,需要知道目标 agent 的 slug(即 agent 目录名,形如 writer-a1b2c3):

  • 当前 agent 自身:在你的 system prompt 的 <session-context> 块中,agent-slug: {slug} 即为当前 agent 的目录名。用它构造路径 .spherse/agents/{slug}/skills/{skill-name}/SKILL.md
  • 其它 agent:询问用户目标 agent 的 slug,或查看 .spherse/agents/ 目录下的子目录名。

标准目录结构

{skill-name}/
├── SKILL.md              # 必需:YAML frontmatter + Markdown 指令正文
├── references/           # 可选:参考文档(如规范、模板说明)
│   └── style-guide.md
└── scripts/              # 可选:辅助模板或代码片段
    └── outline.md
  • SKILL.md(必需):skill 的唯一入口,包含 frontmatter 和指令正文。
  • companion files(可选)SKILL.md 之外的任意文件会被自动枚举为该 skill 的附加文件。agent 加载 skill 时会获得文件清单,可用 read_file 按需读取。建议用 references/scripts/ 等语义化子目录组织。

SKILL.md 格式

SKILL.md 由两部分组成:

1. YAML Frontmatter

文件开头使用 --- 分隔的 YAML 块,必须包含两个字段:

字段 类型 说明
name string skill 名称,必须与目录名完全一致,不可含 /\:,不可以 . 开头
description string 一句话描述 skill 的用途,agent 据此判断是否需要加载该 skill

2. Markdown 指令正文

frontmatter 之后的 Markdown 内容即为 skill 的指令正文。这部分会在 agent 调用 load_skill 时被注入到上下文中,应写清:skill 的目标、具体规则、示例、注意事项。

完整示例

---
name: fiction-style
description: 项目统一的小说写作风格规范,包括人称、时态、对话格式与章节结构约定
---

# 小说写作风格规范

## 人称与视角

- 全文使用第三人称限制视角
- 每章聚焦单一 POV 角色

## 对话格式

对话使用中文引号,人物语言与动作描写分行:

> 林晓转身看向窗外。
> 「这件事,我需要再想想。」

## 注意事项

- 避免大段心理独白,通过动作和环境暗示情绪

Read the full file on GitHub · 133 lines

Changes

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.

  1. 10d ago First seen · 133 lines · 42 tokens per session scan A bbff7c7030f3

Subscribe to this mod's changes

spherse-create-skill is a skill published in the GitHub repository mengrru/Spherse (71 stars, last pushed 4d ago), licensed MIT. It adds 42 tokens to every session and 1,538 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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