UCP Skill — Universal Commerce Protocol Implementation

Core Principles

1. Edge runtime is NOT USED — Only Node.js (default) or Bun (opt-in) runtimes
2. Interactive error handling — When ambiguous, ask the user how to proceed
3. Config-driven — All decisions persist in ucp.config.json
4. Spec-grounded — All implementations reference the canonical UCP specification
5. Next.js conventions — Follow App Router patterns for code organization
6. Deep analysis — Use AST parsing and data flow tracing for gap detection

Spec Repository Handling

Location Priority

Check in this order:

1. ./ucp/ — User's local copy (use as-is)
2. ./.ucp-spec/ — Previously cloned spec (update it)