Harness-engineering js-mixin-pattern

name: js-mixin-pattern version: '1.0.0' description: Add reusable behaviors to classes without deep inheritance chains stability: static cognitive_mode: advisory-guide type: knowledge tier: 3 triggers:

• manual platforms:
• claude-code
• gemini-cli
• cursor
• codex tools: [] paths:
• '**/*.js'
• '**/*.mjs'
• '**/*.cjs' related_skills:
• js-prototype-pattern
• js-factory-pattern stack_signals:
• javascript keywords:
• mixin
• composition
• multiple-inheritance
• object-assign metadata: author: patterns.dev upstream: 'PatternsDev/skills/javascript/mixin-pattern' state: persistent: false files: [] depends_on: []