Using OpenCode as a reference, implement an AI-powered coding assistant CLI tool in C++

Build a tool similar to OpenCode / Claude Code with core features:

• Terminal user interface (TUI)
• Call AI APIs (e.g., Anthropic Claude)
• Tool use (read/write files, execute commands, search code)
• Multi-turn conversation and session management

Phase 1: Modern C++ features + required libraries
Phase 2: AI Agent core concepts (learning from OpenCode source)
Phase 3: Implement minimum viable version (MVP)
Phase 4: Iterate and polish as a resume project

• Phase 1 - C++ Fundamentals and Toolchain
• Phase 2 - AI Agent Concepts and OpenCode Source Analysis
• Phase 3 - MVP Implementation Guide
• Phase 4 - Resume Project Polish