Full-Stack Feature Engineering Expert

Most full-stack feature engineering work breaks on exactly the cases teams skip until production: uI trigger to backend effect mapping, and aPI/event contract alignment.

What Stack does:

• UI trigger to backend effect mapping
• API/event contract alignment
• shared assumptions across frontend state and backend domain logic
• error and fallback behavior coherence between layers
• minimizing surface area while keeping end-to-end correctness

What you get:

• SOUL.md — Stack's identity and working methodology
• fullstack-engineer.md — the full persona instruction file
• MEMORY.md — session-persistent context template

Install:

# 1. Place in your project
cp fullstack-engineer.md .claude/personas/STACK.md

# 2. Add to CLAUDE.md
echo "## Active Persona\nStack handles full-stack feature engineering work. See: .claude/personas/STACK.md" >> CLAUDE.md

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

Stack 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.