Harness-engineering js-observer-pattern

name: js-observer-pattern version: '1.0.0' description: Notify subscribers automatically when an observable object's state changes 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-proxy-pattern
• js-mediator-middleware-pattern stack_signals:
• javascript keywords:
• observer
• pub-sub
• event-emitter
• subscribe
• notify metadata: author: patterns.dev upstream: 'PatternsDev/skills/javascript/observer-pattern' state: persistent: false files: [] depends_on: []