Official agent skill

Macios Xcode Beta Update

by dotnet in dotnet/macios

Update dotnet/macios to a new Xcode beta and validate it end-to-end.

OfficialCustom licenceAuto-check passedMobile

Install Macios Xcode Beta Update

skills CLI
$ npx skills add dotnet/macios --skill macios-xcode-beta-update -a claude-code

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

GitHub CLI
$ gh skill install dotnet/macios macios-xcode-beta-update --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/dotnet/macios.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/macios-xcode-beta-update .claude/skills/macios-xcode-beta-update && 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
macios-xcode-beta-update
GitHub stars
2.9k
Token cost
~1.8k tokens
SKILL.md length
597 words
Files
3 (incl. references)
Skills in repo
9
Repo updated
First seen
Licence
Custom licence

At a glance

Update dotnet/macios to a new Xcode beta and validate it end-to-end.

  • Works in 2 steps: Basic configuration check → Full build validation
  • A user asks to bump Xcode beta versions
  • SKILL.md covers Inputs, File update scope, Validation workflow and XTRO workflow (test updates), plus 3 more sections
  • Calls make, xcrun and dotnet; reaches dl.internalx.com

What it does

Macios Xcode Beta Update is an agent skill from dotnet/macios, published by the product's own GitHub organization. Update dotnet/macios to a new Xcode beta and validate it end-to-end. Use this skill when a user asks to bump Xcode beta versions, update macios SDK/version constants, run xtro-sharpie sanitization, and run introspection tests for iOS/tvOS/macOS/Mac Catalyst.

Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/session-pattern-notes.md`).

It sits in Mobile, covering iOS development. It works with Xcode, .NET, iOS and macOS. The repository describes itself as: .NET for iOS, Mac Catalyst, macOS, and tvOS provide open-source bindings of the Apple SDKs for use with .NET managed languages such as C.

When your agent uses it

  • A user asks to bump Xcode beta versions
  • Update macios SDK/version constants
  • Run xtro-sharpie sanitization
  • Run introspection tests for iOS/tvOS/macOS/Mac Catalyst

Example prompts

  • “/macios-xcode-beta-update”

Workflow steps

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

  1. Basic configuration check
  2. Full build validation

What it can do on your machine

Read from SKILL.md and the folder at commit 354c2a6. 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:

    • make
    • xcrun
    • dotnet

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

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • dl.internalx.com

    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

Macios Xcode Beta Update loads about 1.8k tokens when it runs, and up to ~2.3k if it reads all its reference files. Until then it costs about 71 tokens; SKILL.md has 597 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~71
When it runs · the whole SKILL.md, loaded when a task matches
~1.8k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.3k

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 597 words (~1,790 tokens).

“Run this workflow from the macios repository root.”

— opening of SKILL.md by dotnet, Custom licence
name
macios-xcode-beta-update

Read the full SKILL.md on GitHub

Files

SKILL.md and 2 other files (references) in .agents/skills/macios-xcode-beta-update of dotnet/macios.

  • SKILL.md
  • evals/evals.json
  • references/session-pattern-notes.md

Open the folder on GitHubat commit 354c2a6

Compare with similar skills

Macios Xcode Beta Update 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.

Macios Xcode Beta Update compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Macios Xcode Beta Update this skilldotnet/macios2.9k—~1.8kAutomated safety check: PassCustom licence
Apple Crash Log .NET Symbolicationdotnet/skills5.6k1 repos~2.4kAutomated safety check: PassMIT
Orca iOS Simulator Controlstablyai/orca87k1 repos~584Automated safety check: PassApache-2.0
OdevioOdevio/Odevio-CLI423—~7.6kAutomated safety check: PassMIT
SwiftUI Design SkillWholiver/swiftui-design-skill210—~2.8kAutomated safety check: PassMIT
Xcode Buildpzep1/xcode-build-skill138—~1.5kAutomated safety check: NotesMIT

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Categories

Questions about Macios Xcode Beta Update

What does Macios Xcode Beta Update do?

Update dotnet/macios to a new Xcode beta and validate it end-to-end. Macios Xcode Beta Update is an agent skill from dotnet/macios, published by the product's own GitHub organization. Update dotnet/macios to a new Xcode beta and validate it end-to-end.

When should I use Macios Xcode Beta Update?

Macios Xcode Beta Update fits situations like: A user asks to bump Xcode beta versions; update macios SDK/version constants; run xtro-sharpie sanitization; run introspection tests for iOS/tvOS/macOS/Mac Catalyst.

How do I install Macios Xcode Beta Update in Claude Code?

Run `npx skills add dotnet/macios --skill macios-xcode-beta-update -a claude-code`. Or copy the skill folder (.agents/skills/macios-xcode-beta-update in dotnet/macios) into .claude/skills/macios-xcode-beta-update in your project. Claude Code loads it when a task matches its description.

How do I install Macios Xcode Beta Update in Codex?

Run `npx skills add dotnet/macios --skill macios-xcode-beta-update -a codex`. Or copy the skill folder (.agents/skills/macios-xcode-beta-update in dotnet/macios) into .agents/skills/macios-xcode-beta-update in your project. Codex loads it when a task matches its description.

Can I use Macios Xcode Beta Update 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 dotnet/macios --skill macios-xcode-beta-update -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/macios-xcode-beta-update, .gemini/skills/macios-xcode-beta-update, .github/skills/macios-xcode-beta-update and .opencode/skills/macios-xcode-beta-update in your project.

What does Macios Xcode Beta Update need to run?

Going by SKILL.md and its folder, Macios Xcode Beta Update needs the command-line tools its instructions call (make, xcrun and dotnet).

Does Macios Xcode Beta Update access the network?

SKILL.md names 1 domain. In commands or code: dl.internalx.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Macios Xcode Beta Update 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 Macios Xcode Beta Update use?

Macios Xcode Beta Update 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 Macios Xcode Beta Update use?

About 1.8k tokens (SKILL.md is roughly 7.2k 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 512 tokens, read only when the agent opens those files.

What are the alternatives to Macios Xcode Beta Update?

Skills that share tags, products or a category with Macios Xcode Beta Update: Apple Crash Log .NET Symbolication (dotnet/skills, 5.6k stars), Orca iOS Simulator Control (stablyai/orca, 87k stars), Odevio (Odevio/Odevio-CLI, 423 stars) and SwiftUI Design Skill (Wholiver/swiftui-design-skill, 210 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Macios Xcode Beta Update?

dotnet (a GitHub organization, an official publisher) maintains it in dotnet/macios, which has 2,906 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on October 7, 2026.

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