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Agent skill

Uxc Skill Creator

by holon-run in holon-run/uxc

Create wrapper skills that call remote tools through UXC. An agent skill from holon-run/uxc.

MITAuto-check passedAgent Workflows

Install Uxc Skill Creator

skills CLI
$ npx skills add holon-run/uxc --skill uxc-skill-creator -a claude-code

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

GitHub CLI
$ gh skill install holon-run/uxc uxc-skill-creator --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/holon-run/uxc.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/uxc-skill-creator .claude/skills/uxc-skill-creator && 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
uxc-skill-creator
GitHub stars
116
Token cost
~808 tokens
SKILL.md length
355 words
Files
7 (incl. scripts, references)
Skills in repo
62
Repo updated
First seen
Licence
MIT

At a glance

Create wrapper skills that call remote tools through UXC. An agent skill from holon-run/uxc.

  • Works in 9 steps: Start from user-provided host input → Discover protocol and valid path before… → Detect authentication requirement… → …
  • Defining a new provider skill and you need reusable templates
  • SKILL.md covers Prerequisites, Output Contract, Core Workflow and Hard Rules, plus 2 more sections
  • Runs Shell scripts from its folder

What it does

Uxc Skill Creator is an agent skill from holon-run/uxc. Create wrapper skills that call remote tools through UXC. Use when defining a new provider skill and you need reusable templates, validation rules, and anti-pattern guidance based on proven UXC skill practices.

Its SKILL.md is about 810 tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including scripts and reference files (for example `agents/openai.yaml`, `references/anti-patterns.md` and `references/templates.md`).

It sits in Agent Workflows, covering Skill authoring. The repository describes itself as: A unified CLI for discovering and invoking tools across OpenAPI, MCP, GraphQL, gRPC, and JSON-RPC. The licence is MIT.

When your agent uses it

  • Defining a new provider skill and you need reusable templates
  • Validation rules
  • Anti-pattern guidance based on proven UXC skill practices

Example prompts

  • “/uxc-skill-creator”

Requirements

  • A Bash shell

Workflow steps

9 steps, taken from the first numbered list in SKILL.md.

  1. Start from user-provided host input
  2. Discover protocol and valid path before drafting skill text
  3. Detect authentication requirement explicitly
  4. Fix the wrapper interface
  5. Write SKILL.md as a thin execution policy
  6. Add provider-specific references/usage-patterns.md
  7. Add scripts/validate.sh with strict checks
  8. Add agents/openai.yaml for skill UI metadata.
  9. Run validation and iterate until clean.

What it can do on your machine

Read from SKILL.md and the folder at commit 562d47c. 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

    Ships 1 file in scripts/ (Shell), which the agent can run.

    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

Uxc Skill Creator loads about 808 tokens when it runs, and up to ~2.9k if it reads all its reference files. Until then it costs about 57 tokens; SKILL.md has 355 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~57
When it runs · the whole SKILL.md, loaded when a task matches
~808
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.9k

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); the scripts in this folder are not scanned.

SKILL.md

The full file from holon-run/uxc at commit 562d47c, republished under its MIT licence (© holon-run). 355 words, ~808 tokens.

Download SKILL.mdSave it as .claude/skills/uxc-skill-creator/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.
name
uxc-skill-creator
description
Create wrapper skills that call remote tools through UXC. Use when defining a new provider skill and you need reusable templates, validation rules, and anti-pattern guidance based on proven UXC skill practices.

UXC Skill Creator

Use this skill to design and standardize provider wrapper skills built on top of uxc.

Prerequisites

  • uxc skill is available as the base execution contract.
  • Target wrapper skill scope is clear (provider endpoint, core operations, auth model, write risk).

Output Contract

A wrapper skill created with this skill should include:

  • SKILL.md
  • agents/openai.yaml
  • references/usage-patterns.md
  • scripts/validate.sh

Optional files are allowed only when they add real reusable value.

Core Workflow

  1. Start from user-provided host input:
    • record the raw host the user gives
    • normalize endpoint candidates (scheme/no-scheme, path variants)
  2. Discover protocol and valid path before drafting skill text:
    • search official docs/repo to confirm endpoint shape and auth model
    • probe candidates with uxc <endpoint> -h
    • confirm one working endpoint + protocol as the wrapper target
  3. Detect authentication requirement explicitly:
    • run host help or a minimal read call and inspect envelope/error code
    • if auth-protected, record required model (api key or oauth) and scopes
    • verify local mapping path with uxc auth binding match <endpoint> when OAuth/binding is used
  4. Fix the wrapper interface:
    • provider endpoint (<host>)
    • fixed link command name (<provider>-<protocol>-cli)
    • auth mode (none, api key, oauth)
  5. Write SKILL.md as a thin execution policy:
    • link-first command flow
    • help-first discovery flow
    • JSON envelope parsing and safe-write guardrails
  6. Add provider-specific references/usage-patterns.md:
    • minimal read and write examples
    • key=value and bare JSON positional input examples
  7. Add scripts/validate.sh with strict checks:
    • required files
    • frontmatter fields
    • command style constraints
    • banned legacy patterns
  8. Add agents/openai.yaml for skill UI metadata.
  9. Run validation and iterate until clean.
Show full SKILL.md (104 more words)Show less

Hard Rules

  • Default to link-first (command -v <link_name> then uxc link <link_name> <host>).
  • Default to help-first (<link_name> -h, <link_name> <operation> -h).
  • Use protocol-aware link naming:
    • format: <provider>-<protocol>-cli
    • examples: notion-mcp-cli, github-openapi-cli
  • Prefer key=value; allow bare JSON positional payload.
  • Keep JSON output as automation path; do not rely on --text.
  • Do not use legacy default examples (list/describe/call/removed flags).
  • Do not use dynamic link renaming at runtime.
  • Do not assume protocol/path/auth from host string alone; verify by search + probe.

References

  • Step-by-step implementation flow:
    • references/workflow.md
  • Copy-ready templates:
    • references/templates.md
  • Validation checklist and banned patterns:
    • references/validation-rules.md
  • Observed pitfalls and better defaults:
    • references/anti-patterns.md

See Also

  • Base execution and protocol/auth guidance:
    • skills/uxc/SKILL.md

© holon-run, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 6 other files (scripts, references) in skills/uxc-skill-creator of holon-run/uxc.

  • SKILL.md
  • agents/openai.yaml
  • references/anti-patterns.md
  • references/templates.md
  • references/validation-rules.md
  • references/workflow.md
  • scripts/validate.sh

Open the folder on GitHubat commit 562d47c

Compare with similar skills

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Categories

Questions about Uxc Skill Creator

What does Uxc Skill Creator do?

Create wrapper skills that call remote tools through UXC. An agent skill from holon-run/uxc. Uxc Skill Creator is an agent skill from holon-run/uxc. Create wrapper skills that call remote tools through UXC.

When should I use Uxc Skill Creator?

Uxc Skill Creator fits situations like: defining a new provider skill and you need reusable templates; validation rules; anti-pattern guidance based on proven UXC skill practices.

How do I install Uxc Skill Creator in Claude Code?

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

How do I install Uxc Skill Creator in Codex?

Run `npx skills add holon-run/uxc --skill uxc-skill-creator -a codex`. Or copy the skill folder (skills/uxc-skill-creator in holon-run/uxc) into .agents/skills/uxc-skill-creator in your project. Codex loads it when a task matches its description.

Can I use Uxc Skill Creator 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 holon-run/uxc --skill uxc-skill-creator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/uxc-skill-creator, .gemini/skills/uxc-skill-creator, .github/skills/uxc-skill-creator and .opencode/skills/uxc-skill-creator in your project.

What does Uxc Skill Creator need to run?

Going by SKILL.md and its folder, Uxc Skill Creator needs a shell for the scripts in its folder. Our summary lists: A Bash shell.

Does Uxc Skill Creator 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 Uxc Skill Creator 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Uxc Skill Creator use?

Uxc Skill Creator is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Uxc Skill Creator use?

About 808 tokens (SKILL.md is roughly 3.2k 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 2.1k tokens, read only when the agent opens those files.

What are the alternatives to Uxc Skill Creator?

Skills that share tags, products or a category with Uxc Skill Creator: Skill Creator (Azure/azqr, 795 stars), Claude Code Skill Developer Guide (diet103/claude-code-infrastructure-showcase, 10k stars), Darwin Skill Optimizer (alchaincyf/darwin-skill, 6.2k stars) and Claude Code Command Development (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Uxc Skill Creator?

holon-run (a GitHub organization) maintains it in holon-run/uxc, which has 116 GitHub stars. The repository holds 62 skills in this directory. The repository was last updated on September 15, 2026.

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