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Agent skill

Create Skill

by davekilleen in davekilleen/Dex

Author a new Dex skill that actually fires and passes the quality bar.

Custom licenceAuto-check passedAgent Workflows

Install Create Skill

skills CLI
$ npx skills add davekilleen/Dex --skill create-skill -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install davekilleen/Dex create-skill --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/davekilleen/Dex.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/create-skill .claude/skills/create-skill && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
create-skill
GitHub stars
493
Token cost
~2.9k tokens
SKILL.md length
1,379 words
Files
3 (incl. references)
Skills in repo
91
Repo updated
First seen
Licence
Custom licence

At a glance

Author a new Dex skill that actually fires and passes the quality bar.

  • Works in 9 steps: Get intent → Determine origin → Collision check (before writing anything) → …
  • The user says make a skill
  • SKILL.md covers Step 1 — Get intent, Step 2 — Determine origin, Step 3 — Collision check… and Step 4 — Classify the shape, plus 9 more sections
  • Calls claude

What it does

Create Skill is an agent skill from davekilleen/Dex. Author a new Dex skill that actually fires and passes the quality bar. Runs a collision check, classifies the shape, writes a router-grade description, generates the real package (SKILL.md + evals), and grades it with skill-score before calling it done. Use when the user says 'make a skill', 'I want a /command for X', 'turn this into a skill'. A skill the user builds for themselves is saved under .claude/skills-custom/ (protected from updates) and coached, never blocked — ask for it by its trigger phrases; do not…

Its SKILL.md is about 2.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/trigger-cases.yaml` and `references/dex-skill-standard.md`).

It sits in Agent Workflows, covering LLM evaluation and Skill authoring. It works with Model Context Protocol. The repository describes itself as: Your AI Chief of Staff — a personal operating system starter kit that adapts to your role. No coding required.

When your agent uses it

  • The user says make a skill
  • I want a /command for X
  • Turn this into a skill
  • Do not offer /{name} because Claude Code does not dispatch that folder

Example prompts

  • “make a skill”
  • “I want a /command for X”
  • “turn this into a skill”
  • “/create-skill”

Workflow steps

9 steps, taken from the step headings in SKILL.md.

  1. Get intent
  2. Determine origin
  3. Collision check (before writing anything)
  4. Classify the shape
  5. Write the description (the router)
  6. Generate the package
  7. Validate frontmatter
  8. Score it (the gate)
  9. Inspect, then confirm

What it can do on your machine

Read from SKILL.md and the folder at commit ab5d6ad. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • claude

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Create Skill loads about 2.9k tokens when it runs, and up to ~4.3k if it reads all its reference files. Until then it costs about 202 tokens; SKILL.md has 1,379 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~202
When it runs · the whole SKILL.md, loaded when a task matches
~2.9k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~4.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,379 words (~2,947 tokens).

“Author a skill the way the router and a real user will experience it: it must fire when it should (the description is the router) and do the job safely and well when it fires (the body is a contract…”

— opening of SKILL.md by davekilleen, Custom licence
name
create-skill

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (references) in .claude/skills/create-skill of davekilleen/Dex.

  • SKILL.md
  • evals/trigger-cases.yaml
  • references/dex-skill-standard.md

Open the folder on GitHubat commit ab5d6ad

Compare with similar skills

Create Skill next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Create Skill compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Create Skill this skilldavekilleen/Dex493—~2.9kAutomated safety check: PassCustom licence
Waza Interactivemicrosoft/waza1.4k—~1.3kAutomated safety check: PassMIT
Skill Creatorcuriositech/some_claude_skills243—~7.2kAutomated safety check: PassApache-2.0
Skillforgetripleyak/SkillForge905—~2.3kAutomated safety check: NotesMIT
Workflow Schema Tuningbreaking-brake/cc-wf-studio5.4k—~1.3kAutomated safety check: PassCustom licence
Octocode Graph Eval Loopbgauryy/octocode946—~1.6kAutomated safety check: PassMIT

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Works with

Categories

Questions about Create Skill

What does Create Skill do?

Author a new Dex skill that actually fires and passes the quality bar. Create Skill is an agent skill from davekilleen/Dex. Author a new Dex skill that actually fires and passes the quality bar.

When should I use Create Skill?

Create Skill fits situations like: the user says make a skill; I want a /command for X; turn this into a skill; do not offer /{name} because Claude Code does not dispatch that folder.

How do I install Create Skill in Claude Code?

Run `npx skills add davekilleen/Dex --skill create-skill -a claude-code`. Or copy the skill folder (.claude/skills/create-skill in davekilleen/Dex) into .claude/skills/create-skill in your project. Claude Code loads it when a task matches its description.

How do I install Create Skill in Codex?

Run `npx skills add davekilleen/Dex --skill create-skill -a codex`. Or copy the skill folder (.claude/skills/create-skill in davekilleen/Dex) into .agents/skills/create-skill in your project. Codex loads it when a task matches its description.

Can I use Create Skill in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add davekilleen/Dex --skill create-skill -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/create-skill, .gemini/skills/create-skill, .github/skills/create-skill and .opencode/skills/create-skill in your project.

What does Create Skill need to run?

Going by SKILL.md and its folder, Create Skill needs the command-line tools its instructions call (claude).

Does Create Skill access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Create Skill safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Create Skill use?

Create Skill has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Create Skill use?

About 2.9k tokens (SKILL.md is roughly 12k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.3k tokens, read only when the agent opens those files.

What are the alternatives to Create Skill?

Skills that share tags, products or a category with Create Skill: Waza Interactive (microsoft/waza, 1.4k stars), Skill Creator (curiositech/some_claude_skills, 243 stars), Skillforge (tripleyak/SkillForge, 905 stars) and Workflow Schema Tuning (breaking-brake/cc-wf-studio, 5.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Create Skill?

davekilleen (a GitHub user) maintains it in davekilleen/Dex, which has 493 GitHub stars. The repository holds 91 skills in this directory. The repository was last updated on October 2, 2026.

Source: davekilleen/Dex on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.