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Agent skill

Apple Container

by youknowone in youknowone/pyre

Reproduce Linux-only pyre failures on macOS inside Apple's container CLI, using the Ubuntu 24.04 repro image in tools/.

Custom licenceAuto-check passed

Install Apple Container

skills CLI
$ npx skills add youknowone/pyre --skill apple-container -a claude-code

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

GitHub CLI
$ gh skill install youknowone/pyre apple-container --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/youknowone/pyre.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/apple-container .claude/skills/apple-container && 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
apple-container
GitHub stars
116
Token cost
~2.5k tokens
SKILL.md length
1,111 words
Files
1
Skills in repo
6
Repo updated
First seen
Licence
Custom licence

At a glance

Reproduce Linux-only pyre failures on macOS inside Apple's container CLI, using the Ubuntu 24.04 repro image in tools/.

  • Works in 7 steps: Check whether the container is already… → Start it if absent, from the repository… → One-time per cache, inside the container → …
  • A failure is visible on a Linux CI leg but not locally — a CPython suite (gate) row
  • SKILL.md covers What this can and cannot…, Images, Workflow and Traps
  • Calls git, python3 and cargo

What it does

Apple Container is an agent skill from youknowone/pyre. Reproduce Linux-only pyre failures on macOS inside Apple's container CLI, using the Ubuntu 24.04 repro image in tools/. Invoked via /apple-container. Use this skill whenever a failure is visible on a Linux CI leg but not locally — a CPython suite (gate) row, an ubuntu-only pyre/check.py failure, a crash that only the linux runner sees — or when the user says "linux에서 재현해줘", "run this in the container", "ubuntu에서 확인", "apple container로 돌려줘". Also use it before claiming a Linux-only red is inherited or…

Its SKILL.md is about 2.5k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with Linux, macOS and Python. The repository describes itself as: PyRe will be a very fast and compliant implementation of the Python language.

When your agent uses it

  • A failure is visible on a Linux CI leg but not locally — a CPython suite (gate) row
  • An ubuntu-only pyre/check.py failure
  • A crash that only the linux runner sees —
  • The user says linux에서 재현해줘

Example prompts

  • “linux에서 재현해줘”
  • “run this in the container”
  • “ubuntu에서 확인”
  • “/apple-container”

Requirements

  • Python 3
  • Docker

Workflow steps

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

  1. Check whether the container is already up — do not start a second one
  2. Start it if absent, from the repository root. Three mounts are required
  3. One-time per cache, inside the container
  4. Set CARGO_TARGET_DIR to an absolute path for every build and run. The
  5. Run the thing that is red on Linux
  6. Report by comparing the two hosts explicitly: what macOS does, what Linux
  7. Leave the container running. Remove it only when asked

What it can do on your machine

Read from SKILL.md and the folder at commit 08b7c10. 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:

    • git
    • python3
    • cargo
    • rg

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

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    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

Apple Container loads about 2.5k tokens when it runs. Until then it costs about 137 tokens; SKILL.md has 1,111 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~137
When it runs · the whole SKILL.md, loaded when a task matches
~2.5k

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 1,111 words (~2,500 tokens).

“Only the CI legs on ubuntu-24.04 run some checks, and darwin/linux divergence is a recurring source of reds that cannot be judged from a macOS worktree. This skill runs the same code under a Linux userspace on the same machine.”

— opening of SKILL.md by youknowone, Custom licence
name
apple-container

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/apple-container of youknowone/pyre.

Open the folder on GitHubat commit 08b7c10

Compare with similar skills

Apple Container 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.

Apple Container compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Apple Container this skillyouknowone/pyre116—~2.5kAutomated safety check: PassCustom licence
Apple Container Test RunnerRustPython/RustPython22k—~467Automated safety check: PassMIT
OrcaSlicer G-code Slicingearthtojake/text-to-cad18k—~989Automated safety check: PassMIT
Environment SetupNorman-bury/research-writing-skill3.4k—~840Automated safety check: PassMIT
Browser MCP Agentantibrow/anti-detect-browser-skills9321 repos~4.2kAutomated safety check: WarnMIT
Remote Hostslibnativeapi/nativeapi161—~1.3kAutomated safety check: PassMIT

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Works with

Questions about Apple Container

What does Apple Container do?

Reproduce Linux-only pyre failures on macOS inside Apple's container CLI, using the Ubuntu 24.04 repro image in tools/. Apple Container is an agent skill from youknowone/pyre.04 repro image in tools/.

When should I use Apple Container?

Apple Container fits situations like: A failure is visible on a Linux CI leg but not locally — a CPython suite (gate) row; an ubuntu-only pyre/check.py failure; A crash that only the linux runner sees —; the user says linux에서 재현해줘.

How do I install Apple Container in Claude Code?

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

How do I install Apple Container in Codex?

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

Can I use Apple Container 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 youknowone/pyre --skill apple-container -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/apple-container, .gemini/skills/apple-container, .github/skills/apple-container and .opencode/skills/apple-container in your project.

What does Apple Container need to run?

Going by SKILL.md and its folder, Apple Container needs the command-line tools its instructions call (git, python3, cargo and rg). Our summary lists: Python 3; Docker.

Does Apple Container access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Apple Container 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 Apple Container use?

Apple Container 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 Apple Container use?

About 2.5k tokens (SKILL.md is roughly 10k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Apple Container?

Skills that share tags, products or a category with Apple Container: Apple Container Test Runner (RustPython/RustPython, 22k stars), OrcaSlicer G-code Slicing (earthtojake/text-to-cad, 18k stars), Environment Setup (Norman-bury/research-writing-skill, 3.4k stars) and Browser MCP Agent (antibrow/anti-detect-browser-skills, 932 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Apple Container?

youknowone (a GitHub user) maintains it in youknowone/pyre, which has 116 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on October 8, 2026.

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