skill-creator-advanced

skill-creator-advanced is a skill for Claude Code, Codex from kevintsengtw/dotnet-testing-agent-skills. It costs 48 tokens per session (2,925 once invoked), scanned A, original, MIT.

A skill for creating, updating, testing, evaluating, and packaging coding-agent skills. It includes guidance for writing trigger descriptions, preparing evaluations, checking structure, and producing distributable skill files.

In plain words
What is it for?
Use it when building or revising a skill, writing evaluation cases, running benchmarks, validating files, or packaging a skill.
Why use it?
It turns skill development into a repeatable process and helps check whether a skill activates correctly and performs its intended work.

Skill for Claude CodeCodex

Which agent this was written for is unclear — built for openclaw. Also seen: mentions subagents; built for openclaw.

Good fit Use it when building or revising a skill, writing evaluation cases, running benchmarks, validating files, or packaging a skill.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kevintsengtw/dotnet-testing-agent-skills/skill-creator-advanced
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 kevintsengtw/dotnet-testing-agent-skills --skill skill-creator-advanced
Clone the repo
git clone --depth 1 https://github.com/kevintsengtw/dotnet-testing-agent-skills

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 skill-creator-advanced

README.md
[![agentmods](https://agentmods.dev/badge/skills/kevintsengtw/dotnet-testing-agent-skills/skill-creator-advanced.svg)](https://agentmods.dev/skills/kevintsengtw/dotnet-testing-agent-skills/skill-creator-advanced)
Your own site
<a href="https://agentmods.dev/skills/kevintsengtw/dotnet-testing-agent-skills/skill-creator-advanced"><img src="https://agentmods.dev/badge/skills/kevintsengtw/dotnet-testing-agent-skills/skill-creator-advanced.svg" alt="Measured on agentmods" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,925 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 $0.00048 $0.02925
Opus 5 $0.00024 $0.01463
Sonnet 5 $0.00010 $0.00585
Haiku 4.5 $0.00005 $0.00293

Measured 8d ago against content hash f8b7dc72095a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

skill-creator-advanced 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 8d ago.

The scan reads SKILL.md. This mod also ships 15 executable files (scripts/aggregate_benchmark.py, scripts/check_regression_gates.py, scripts/format_check.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/skill-creator-advanced/SKILL.md · 208 lines

How it starts

The opening of the file, as written. The whole thing — 208 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Creator Advanced

此 skill 的目標是把「做 skill」變成可重複執行的工程流程,而不是一次性的 prompt 雜談。

它同時提供:

  • 可操作的流程:從需求、設計、驗證、evals、benchmark、打包到迭代
  • 可重用的腳本:初始化、格式檢查、驗證、測試計畫產生、workspace 準備、benchmark 彙整、regression gate 檢查、打包
  • 可拆分的參考文件:把長內容放到 references/,維持 progressive disclosure
  • 輕量 review viewer:把 with-skill / baseline 結果整理成可檢閱的 HTML

快速開始(你只要做一個新 skill)

  1. 先從現有對話、repo、範例任務整理 2-3 個 use cases,不夠再補問。
  2. 為每個 use case 寫 trigger 語句與 done looks like。
  3. 建立 skill 資料夾:
python scripts/init_skill_advanced.py <skill-name> --path <output-dir>
  1. 補完新 skill 的 SKILL.md,優先寫對 YAML 的 description
  2. 做格式與結構檢查:
python scripts/format_check.py <path/to/skill>
python scripts/quick_validate.py <path/to/skill>
  1. 規劃真實測試案例,必要時產生測試計畫:
python scripts/generate_test_plan.py <path/to/skill> --out references/test_plan.md
  1. 準備 eval workspace,讓 with-skill / baseline 能沿用固定目錄結構:
python scripts/prepare_eval_workspace.py <path/to/skill>
  1. 打包成 .skill
python scripts/package_skill.py <path/to/skill> <output-dir>
  1. 若要優化 description 的觸發品質,另外準備 trigger eval set,再跑:
python scripts/run_eval.py --eval-set <path/to/trigger-evals.json> --skill-path <path/to/skill> --model <model-id>
python scripts/run_loop.py --eval-set <path/to/trigger-evals.json> --skill-path <path/to/skill> --model <model-id> --apply-best

操作方式

當使用者要建立或改版 skill 時,請用下列順序推進;可以跳步,但要明確說明原因。

  1. Phase 0:從上下文萃取需求
  • 先看對話歷史、現有檔案、既有流程,再決定要不要追問。
  • 用使用者熟悉的術語溝通;如果對方不熟技術名詞,不要把 jargon 當前提。
  • 先判斷是否真的值得做成 skill:如果問題一次性、沒有可重用流程,應直接指出不值得包成 skill。
  1. Phase 1:需求與 use cases
  • 先拿到 2-3 個具體 use cases。
  • 每個 use case 至少要有:trigger 語句、必要輸入、主要步驟、輸出、done looks like。
  • 若使用者只給模糊目標,應主動提出一組合理 use cases 讓對方確認。
  1. Phase 2:架構與 SKILL.md
  • 決定哪些內容要放 scripts/references/assets/
  • description 必須同時回答兩件事:這個 skill 做什麼、什麼情況下應該觸發。
  • description 要用真實使用者語句,而不是作者自嗨式分類。
  • 核心流程留在 SKILL.md,細節與變體移到 references/
  1. Phase 3:撰寫指令
  • 優先寫會改變行為的指令,不要解釋模型本來就知道的常識。
  • 能直接下命令就直接下命令;只有在理由能降低誤用時才補一句 why。
  • 預設遵守 least surprise:讓 skill 的行為符合一般使用者直覺,不要偷偷改目標。

Read the full file on GitHub · 208 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. 8d ago First seen · 208 lines · 48 tokens per session scan A f8b7dc72095a

Subscribe to this mod's changes

skill-creator-advanced is a skill published in the GitHub repository kevintsengtw/dotnet-testing-agent-skills (28 stars, last pushed 23d ago), licensed MIT. It adds 48 tokens to every session and 2,925 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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