uno: Skill for Claude Code

.claude/skills/runtime-tests/SKILL.md

runtime-tests is a skill for Claude Code from unoplatform/uno. It costs 25 tokens per session (2,967 once invoked), scanned A, original, Apache-2.0.

A test-running workflow for Uno Platform, a framework for building apps that run on multiple operating systems. It builds and runs all tests or selected tests on desktop or in a web browser.

In plain words
What is it for?
Running every Uno Platform runtime test, one test class, one test method, or several named tests on Skia Desktop or Skia WebAssembly.
Why use it?
It handles the special base64 encoding required by the test runner and resolves partial test names into the full names needed to run them.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: positional $N argument.

This is unoplatform/uno's own configuration. It tells Claude Code how to work on uno itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything uno configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python build/test-scripts/skia-browserwasm-file-creation-server.py 8001 &.

About the project

Uno Platform is an open-source .NET development platform that lets developers build native mobile, web, desktop, and embedded applications from one C# and XAML codebase. It is intended for .NET developers who want to share application code across multiple operating systems and device types. The catalogue entries support development workflows for Uno Platform with skills, agents, commands, and instructions.

unoplatform/uno · 10,080 stars · on GitHub · platform.uno

Reuse

Borrowing it

Nothing to install: this file belongs to unoplatform/uno. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/unoplatform/uno/master/.claude/skills/runtime-tests/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/unoplatform/uno

Made for: Claude Code.

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 runtime-tests

README.md
[![agentmods](https://agentmods.dev/badge/skills/unoplatform/uno/runtime-tests/github.svg)](https://agentmods.dev/skills/unoplatform/uno/runtime-tests)
Your own site
<a href="https://agentmods.dev/skills/unoplatform/uno/runtime-tests"><img src="https://agentmods.dev/badge/skills/unoplatform/uno/runtime-tests/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 runtime-tests

Your own site · 80×15
<a href="https://agentmods.dev/skills/unoplatform/uno/runtime-tests"><img src="https://agentmods.dev/badge/skills/unoplatform/uno/runtime-tests.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,967 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00025 $0.02967
Opus 5.5 $0.00010 $0.01187
Sonnet 5.5 $0.00005 $0.00593
Haiku 4.5 $0.00003 $0.00297

Measured 7d ago against content hash abea54fa43f4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

runtime-tests scanned grade A with 1 finding 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 7d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

python -c "import urllib.parse; print(urllib.parse.quote('$1', safe=''))"
.claude/skills/runtime-tests/SKILL.md · 273 lines

How it starts

The opening of the file, as written. The whole thing — 273 lines — stays where its author put it; the contents beside it link to each section on GitHub.

User Input

$ARGUMENTS

You MUST consider the user input before proceeding (if not empty).


Overview

You are executing the Run Tests Skill. This skill builds and runs Uno Platform runtime tests with the correct base64 filter encoding that the test runner requires. It handles the non-obvious encoding requirement and provides correct platform-specific commands.


Execution Workflow

Phase 0: Parse User Input

Determine what to run from the user's input:

  • All tests: No filter needed
  • Specific test class: e.g., Given_Button → resolve to fully qualified name
  • Specific test method: e.g., Given_Button.When_ContentSet → resolve to fully qualified name
  • Multiple tests: Pipe-separated list of fully qualified names

If the user provides partial names, search src/Uno.UI.RuntimeTests/ to resolve fully qualified test names (namespace + class + method).

Determine target platform from user input. Supported platforms:

Platform Keyword(s) Default
Skia Desktop desktop, skia, or unspecified Yes
Skia WASM wasm, webassembly, browser No

Default: Skia Desktop (fastest build and execution).

Choose Skia WASM only when:

  • The user explicitly asks for WASM/browser testing, OR
  • The bug or behavior is WASM-specific (e.g., DOM interaction, browser rendering, JS interop)

Strict mode: If the user input contains the keyword strict, omit the -p:UnoFastDevBuild=true and -p:UnoTargetFrameworkOverride=net11.0-desktop flags from the build command in Phase 1 so the build runs with full CI-equivalent analyzer coverage and all cross-targeted TFMs. Use this only when verifying that a change still compiles cleanly under CI strictness — for normal iteration the default (fast) flags should be left on.

Phase 1: Build the Test App

CRITICAL: Set timeout to 15+ minutes. NEVER cancel builds.

The default build commands below pass -p:UnoFastDevBuild=true (disables analyzers for local iteration — has no effect on CI) and -p:UnoTargetFrameworkOverride=net11.0-desktop (skips the redundant cross-targeted output for Skia libraries). Combined, these cut a clean SamplesApp desktop build from ~3:23 → ~1:59 and a Uno.UI-incremental rebuild from ~2:23 → ~0:58 on a 32-core Windows machine. Omit both flags if the user requested strict mode (see Phase 0).

Read the full file on GitHub · 273 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. 7d ago Changed · +16 lines abea54fa43f4
  2. 21d ago Changed 90ce9ee8a235
  3. 1mo ago Changed b60cafb38317
  4. 1mo ago First seen · 257 lines · 25 tokens per session scan A c039c5e3a67b

Subscribe to this mod's changes

runtime-tests is a skill published in the GitHub repository unoplatform/uno (10,080 stars, last pushed today), licensed Apache-2.0. It adds 25 tokens to every session and 2,967 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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