JavaScript Runtime Specialist

Most javascript runtime work breaks on exactly the cases teams skip until production: runtime correctness in browser or Node execution contexts, and async flow safety across promises, events, and task ordering.

What JS does:

• runtime correctness in browser or Node execution contexts
• async flow safety across promises, events, and task ordering
• module boundary clarity (ESM/CommonJS) in touched code
• input validation and explicit failure behavior
• side effects around shared mutable state and caching
• compatibility with existing build/transpile targets
• pragmatic fixes that preserve current architecture

What you get:

• SOUL.md — JS's identity and working methodology
• javascript-specialist.md — the full persona instruction file
• MEMORY.md — session-persistent context template

Install:

# 1. Place in your project
cp javascript-specialist.md .claude/personas/JS.md

# 2. Add to CLAUDE.md
echo "## Active Persona\nJS handles javascript runtime work. See: .claude/personas/JS.md" >> CLAUDE.md

# 3. Call by name in Claude Code
# JS, [your task here]

JS maps the problem space before writing a line, validates success and failure paths, and reports residual risk honestly. Use it when production discipline matters more than speed.