cmux Testing

cmux Testing is a Quality skill for Claude Code, published by manaflow-ai in cmux.

26K stars2.2K forkson manaflow-ai/cmuxAdded 2026/08/14Repository updated 2026/08/14

ampclaude-codeclicodexcoding-agentsgeminighosttymacosmultiplexermultitaskingopencodeorganizationparallel-agentsprogrammabilityterminalterminal-multiplexertmuxworkspace-manager

Install in seconds

Install cmux Testing

Copy cmux Testing into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-testing ~/.claude/skills/cmux-testing

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/manaflow-ai/cmux.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/cmux-testing/SKILL.md in manaflow-ai/cmux
Installs to: ~/.claude/skills/cmux-testing
Collection: One of 20 skills cataloged from this repository
Category: Quality — 1354 skills

What cmux Testing does

cmux Testing defines Swift Testing rules for cmux and validates test target compilation and test wiring. Use when adding or changing tests, touching package/refactor code, or deciding whether reload.sh is enough validation.

cmux Testing is cataloged under Quality on DirSkills. cmux Testing comes from a repository tagged amp, claude-code, cli, codex and coding-agents.

Documentation

README

Excerpt

cmux Testing

Regression test commit policy

A regression test for a bug fix ships as two commits so CI proves the test catches the bug:

The failing test only, no fix. CI goes red.
The fix. CI goes green.

The GitHub PR Commits tab then shows the test genuinely fails without the fix.

Test wiring

This is the opening of the README. Read the full README on GitHub.

Frequently asked about cmux Testing

What else does manaflow-ai publish alongside cmux Testing?
cmux Testing is one of 20 skills that DirSkills catalogs from manaflow-ai/cmux, the repository it ships in. Its siblings there include CMUX Architecture, CMUX Billing and CMUX Shared Behavior. Each one is a separate skill with its own page in this directory, installs the same way cmux Testing does, and is maintained by manaflow-ai in that same repository. The rest of the collection is listed on the manaflow-ai/cmux page.
How does cmux Testing compare to other Quality skills?
cmux Testing ranks #113 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of cmux Testing against them. Open each page to compare what they document and how they install.