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Agent skill

Test Cross Platform

by r3bl-org in r3bl-org/r3bl-open-core

Synchronize repository changes to remote test fleet (macOS, Windows) and execute the full test suite across all platforms concurrently.

Apache-2.0Auto-check passedTesting & QA

Install Test Cross Platform

skills CLI
$ npx skills add r3bl-org/r3bl-open-core --skill test-cross-platform -a claude-code

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

GitHub CLI
$ gh skill install r3bl-org/r3bl-open-core test-cross-platform --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/r3bl-org/r3bl-open-core.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/test-cross-platform .claude/skills/test-cross-platform && 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
test-cross-platform
GitHub stars
485
Token cost
~771 tokens
SKILL.md length
294 words
Files
1
Skills in repo
25
Repo updated
First seen
Licence
Apache-2.0

At a glance

Synchronize repository changes to remote test fleet (macOS, Windows) and execute the full test suite across all platforms concurrently.

  • Works in 4 steps: Fleet Synchronization → Concurrent Test Execution → Targeted Subsystem Testing (Optional) → …
  • Tasks that involve Test generation
  • SKILL.md covers When to Use, Fleet Overview and Workflow
  • Calls cargo, ssh and scp

What it does

Test Cross Platform is an agent skill from r3bl-org/r3bl-open-core. Synchronize repository changes to remote test fleet (macOS, Windows) and execute the full test suite across all platforms concurrently.

Its SKILL.md is about 770 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Test generation. It works with macOS, GitHub and Linux. The repository describes itself as: TUI framework and developer productivity apps in Rust 🦀. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Test generation

Example prompts

  • “/test-cross-platform”

Workflow steps

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

  1. Fleet Synchronization
  2. Concurrent Test Execution
  3. Targeted Subsystem Testing (Optional)
  4. Result Aggregation & Reporting

What it can do on your machine

Read from SKILL.md and the folder at commit 89db352. 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:

    • cargo
    • ssh
    • scp

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

  • Network

    No URLs in SKILL.md. Its commands use ssh and scp, 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

Test Cross Platform loads about 771 tokens when it runs. Until then it costs about 39 tokens; SKILL.md has 294 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~39
When it runs · the whole SKILL.md, loaded when a task matches
~771

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

The full file from r3bl-org/r3bl-open-core at commit 89db352, republished under its Apache-2.0 licence (© r3bl-org). 294 words, ~771 tokens.

Download SKILL.mdSave it as .claude/skills/test-cross-platform/SKILL.md (or your agent's skills folder).
name
test-cross-platform
description
Synchronize repository changes to remote test fleet (macOS, Windows) and execute the full test suite across all platforms concurrently.

Cross-Platform Fleet Testing

Run the full test suite across the cross-platform fleet (Linux host, macOS, and Windows) to verify compatibility, platform gates, and asynchronous I/O behavior.

When to Use

  • After modifying cross-platform code, platform-specific #[cfg(...)] gates, or PTY logic.
  • Before merging pull requests or finalizing release milestones.
  • When the user runs /test-cross-platform or asks to test across platforms/fleet.

Fleet Overview

PlatformHost AddressShellRepository PathTest Runner
LinuxLocal host (nazmul-mobile.local)bash / fish~/github/roc./check.fish --test
macOSnazmul-mac.localfish~/github/roc./check.fish --test
Windowsnazmul-win.localnu (Nushell)github/roccargo test

Workflow

Step 1: Fleet Synchronization

Synchronize the local repository to all remote fleet machines using scp:

  1. Windows:

    bash
    scp -r ~/github/roc/. nazmul-win.local:github/roc/

  2. macOS:

    bash
    scp -r ~/github/roc/. nazmul-mac.local:github/roc/

Both sync operations can run in parallel.

Step 2: Concurrent Test Execution

Run the full test suite across all three platforms concurrently using non-blocking background tasks (run_command with async tasks) so the conversation is not frozen:

  1. Linux (Local):

    bash
    ./check.fish --test

    (Alternatively: cargo test --workspace)

  2. macOS:

    bash
    ssh nazmul-mac.local "cd ~/github/roc && ./check.fish --test"

    (Alternatively: ssh nazmul-mac.local "cd ~/github/roc && cargo test")

  3. Windows:

    bash
    ssh nazmul-win.local "cd github/roc; cargo test"
Step 3: Targeted Subsystem Testing (Optional)

When testing specific subsystems (like core::pty) during active refactoring rather than the entire workspace:

  • Linux: cargo test -p r3bl_tui core::pty
  • macOS: ssh nazmul-mac.local "cd ~/github/roc && cargo test -p r3bl_tui core::pty"
  • Windows: ssh nazmul-win.local "cd github/roc; cargo test -p r3bl_tui core::pty"
Step 4: Result Aggregation & Reporting
  1. Wait for all three runs to conclude (via reactive task completion messages).
  2. Extract summary lines (test result: ok. <X> passed; <Y> failed; ...).
  3. Present results in a markdown summary table:
PlatformHost / MachineResultTests PassedTests FailedDuration
Linuxnazmul-mobile.localPASSED5300.01s
macOSnazmul-mac.localPASSED5300.02s
Windowsnazmul-win.localPASSED5500.46s
  1. If any test fails, extract the failure diagnostics and failing test names for triage.
  2. Emit attention beep signal:
    bash
    fish -c "beep"

© r3bl-org, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/test-cross-platform of r3bl-org/r3bl-open-core.

Open the folder on GitHubat commit 89db352

Compare with similar skills

Test Cross Platform 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.

Test Cross Platform compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Test Cross Platform this skillr3bl-org/r3bl-open-core485—~771Automated safety check: PassApache-2.0
Kane CLI Browser TestingLambdaTest/kane-cli248—~8.4kAutomated safety check: PassApache-2.0
Neru File Issuey3owk1n/neru793—~890Automated safety check: PassMIT
Releasenotepadqq/notepadqq2.3k—~2kAutomated safety check: PassGPL-3.0
GitHub Activity Analyzerchangkun/dotfiles151—~1.6kAutomated safety check: PassMIT
SetupProrise-cool/Claude-Code-Multi-Agent305—~3kAutomated safety check: NotesNone

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Works with

Categories

Questions about Test Cross Platform

What does Test Cross Platform do?

Synchronize repository changes to remote test fleet (macOS, Windows) and execute the full test suite across all platforms concurrently. Test Cross Platform is an agent skill from r3bl-org/r3bl-open-core. Synchronize repository changes to remote test fleet (macOS, Windows) and execute the full test suite across all platforms concurrently.

When should I use Test Cross Platform?

Test Cross Platform fits situations like: tasks that involve Test generation.

How do I install Test Cross Platform in Claude Code?

Run `npx skills add r3bl-org/r3bl-open-core --skill test-cross-platform -a claude-code`. Or copy the skill folder (.agents/skills/test-cross-platform in r3bl-org/r3bl-open-core) into .claude/skills/test-cross-platform in your project. Claude Code loads it when a task matches its description.

How do I install Test Cross Platform in Codex?

Run `npx skills add r3bl-org/r3bl-open-core --skill test-cross-platform -a codex`. Or copy the skill folder (.agents/skills/test-cross-platform in r3bl-org/r3bl-open-core) into .agents/skills/test-cross-platform in your project. Codex loads it when a task matches its description.

Can I use Test Cross Platform 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 r3bl-org/r3bl-open-core --skill test-cross-platform -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-cross-platform, .gemini/skills/test-cross-platform, .github/skills/test-cross-platform and .opencode/skills/test-cross-platform in your project.

What does Test Cross Platform need to run?

Going by SKILL.md and its folder, Test Cross Platform needs the command-line tools its instructions call (cargo, ssh and scp).

Does Test Cross Platform access the network?

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

Is Test Cross Platform 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 Test Cross Platform use?

Test Cross Platform is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Test Cross Platform use?

About 771 tokens (SKILL.md is roughly 3.1k 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 Test Cross Platform?

Skills that share tags, products or a category with Test Cross Platform: Kane CLI Browser Testing (LambdaTest/kane-cli, 248 stars), Neru File Issue (y3owk1n/neru, 793 stars), Release (notepadqq/notepadqq, 2.3k stars) and GitHub Activity Analyzer (changkun/dotfiles, 151 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Test Cross Platform?

r3bl-org (a GitHub organization) maintains it in r3bl-org/r3bl-open-core, which has 485 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on October 8, 2026.

Source: r3bl-org/r3bl-open-core on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.