When a project is loaded via /project, the prompt now shows: agent_name |[project_name]> where the |[project_name]> part is displayed in blue. Examples: - Default: g3> - With project: g3 |[myapp]> - Agent mode: butler> - Agent + project: butler |[myapp]> The prompt automatically resets when /unproject is called. Added build_prompt() function with 7 unit tests covering all prompt states.