create-skill

A guided workflow for creating reusable coding-agent skills from scratch, including their name, trigger words, instructions, and optional files.

In plain words
What is it for?
Use it to design and create a new skill, such as a repeatable research or operations workflow, following the Agent Skills format.
Why use it?
It turns an informal idea into a defined skill and waits for your confirmation before saving it.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/travisun/opptrix/create-skill
Any agent
npx skills add Travisun/Opptrix --skill create-skill
Clone the repo
git clone --depth 1 https://github.com/Travisun/Opptrix

Made for: Claude Code, Codex.

Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 721 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00079 $0.00721
Opus 5 $0.00039 $0.00360
Sonnet 5 $0.00016 $0.00144
Haiku 4.5 $0.00008 $0.00072

Measured 2d ago against content hash e26f2e6ab634, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 2d 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/agent-skills/builtin/create-skill/SKILL.md · 49 lines

What it actually says

创建工作流技能

何时使用

用户要从零新建定制一个可复用的投研工作流技能(不是激活已有早报/收盘等内置技能,也不是导入现成 Markdown)。本技能不默认产出 create_web

步骤

  1. 弄清目标:用 ask_user 确认场景、触发词、默认交付物(投研类建议 create_web;运维类可为 none)。
  2. 命名name 须小写 a-z0-9 与连字符、1–64 字、不首尾连字符、无连续 --
  3. description:1–1024 字,写清何时使用、触发词,以及是否默认网页交付。
  4. frontmatter:至少 name + description;建议补齐 Composer 元数据:
    • metadata.title / summary / category / slash-rank / default-deliverable
    • 投研类:allowed-tools 含业务工具 + create_web update_web read_web list_web_vendormetadata.required-packs 含业务 pack + artifacts
  5. 正文:含何时用、分析架构、数据维度、步骤、网页目录(若默认 web)、禁止项。
  6. 附件(可选):见 get_agent_skill_file(skill_name="create-skill", path="references/attachment-guide.md")
  7. 预览确认:展示 name、description、正文摘要;ask_user 确认后再创建。
  8. 写入create_agent_skill(..., confirmed=true)
  9. 可选激活:询问是否 activate_agent_skill 试用。

模板与规范

  • 最小合规模板:get_agent_skill_file(skill_name="create-skill", path="references/skill-template.md")
  • 附件目录说明:get_agent_skill_file(skill_name="create-skill", path="references/attachment-guide.md")

注意

  • 未获用户确认前confirmed=true
  • 技能正文不得含 prompt 注入(如「忽略以上规则」「推荐买入」)
  • import_agent_skill 区分:用户已有完整 Markdown 才走导入
  • 不要为「完成感」强行 create_web
Files

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.

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. 2d ago First seen · 49 lines · 79 tokens per session scan A e26f2e6ab634

Subscribe to this mod's changes

create-skill is a skill published in the GitHub repository Travisun/Opptrix (224 stars, last pushed 4d ago), licensed Apache-2.0. It adds 79 tokens to every session and 721 once invoked, about $0.0004 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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