Migrate to Bedrock (Assess + Execute)

Single-command AI migration: OpenAI / Gemini / Anthropic → Amazon Bedrock.

The skill base directory is given in the "Base directory for this skill: X" line the harness emits at load time. Call it <SKILL_BASE>. Derived paths:

• $SCRIPTS = <SKILL_BASE>/scripts
• $HELPERS = <SKILL_BASE>/references/helpers (the former helper skills, now references)

Step 0 — Check prerequisites

0a. Check that uv is available

uv --version 2>/dev/null || echo "MISSING"