Spidey — Autonomous Development Loop

Sets up a Ralph autonomous development loop. Unlike raw Ralph which just takes a checklist, Spidey first generates a full PRD, then derives all tasks from it.

The Spidey Pipeline

User's lazy description
    ↓
┌─────────────────────────────────┐
│ PHASE 0: PRD GENERATION         │
│ Full product requirements doc   │
│ from a one-line description     │
└─────────────────────────────────┘
    ↓
┌─────────────────────────────────┐
│ PHASE 1: TASK DERIVATION        │
│ fix_plan.md derived FROM the    │
│ PRD, not invented from nothing  │