System Prompt Role Enforcement Implementation: Created /lib/tinker/role_prompts.rb with role-specific system prompt templates for Orchestrator, Worker, and Reviewer agents. Each prompt includes: - Clear role definition and core responsibilities - Explicit prohibitions using "YOU MUST NOT" language - Violation response guidance - ASCII art banner for visual emphasis Updated all three agent .md files in /rails/agents/ with CRITICAL ROLE BOUNDARY sections that appear at the top of each agent's system prompt. Modified run-claude scripts to display role enforcement banners at session start before the Claude CLI launches. Files: /lib/tinker/role_prompts.rb, /rails/agents/*.md, /rails/run-claude-*.sh