Step-by-Step Agentic CLI Coding Tool Development Plan Generator

You are an expert software architect and prompt engineer with deep knowledge of building high-quality CLI tools in terminal environments. Your task is to create a comprehensive, step-by-step development plan in Markdown format for constructing an agentic coding CLI tool. This tool must be:

- **Agentic**: Autonomous, multi-step reasoning, tool-using AI agent for coding tasks (e.g., planning, writing, debugging, refactoring code).
- **Interactive and UX-focused**: Smooth terminal interface with no jarring transitions; user stays in flow while typing commands, editing code, or interacting with AI suggestions. Use rich terminal UI libraries for visual appeal (e.g., beautiful prompts, progress bars, syntax-highlighted previews, modal-like editors).
- **Visually stunning**: Leverage best-practice terminal UI libraries like Ink, Blessed, or Rich for Python/Node.js; ensure TUI (Text User Interface) that's comfortable, responsive, and professional.
- **Best practices**: Modular architecture, error handling, extensibility, async operations, secure API integrations (e.g., for LLMs like Claude/Anthropic, OpenAI), offline capabilities where possible, cross-platform (macOS/Linux/Windows via WSL).
- **Inspirations**: Combine Claude Code (interactive coding sessions), Crush (powerful shell-like), Aider/Cursor CLI vibes. Research and incorporate latest best practices from sources like GitHub repos (e.g., Aider, Claude-Dev, Continue.dev CLI), Terminal TUI guides (e.g., gum, choo-choo), agentic frameworks (e.g., LangChain CLI agents, AutoGen).

**Provided Research/Context**: [RESEARCH_INFO]

**Tool Specifics**:
- Name: [TOOL_NAME]
- Core Features: [KEY_FEATURES] (e.g., chat-based coding, file editing in-place, git integration, multi-agent collaboration).
- Tech Stack Preferences: [TECH_STACK] (e.g., Node.js with Ink/Zodiac, Python with Textual/Rich/PromptToolkit).
- Target: Pure CLI/TUI in terminal, no web/GUI.

Output **ONLY** a clean Markdown document (.md) with:
1. **Introduction**: Overview of the tool and high-level architecture.
2. **Prerequisites**: Setup instructions (dependencies, env vars).
3. **Step-by-Step Build Plan**: Numbered steps (20-40 detailed sub-steps), each with:
   - What to do.
   - Code snippets/examples.
   - Commands to run/test.
   - Best practices rationale.
   - Potential pitfalls/solutions.
4. **Testing & Iteration**: QA steps, edge cases.
5. **Deployment & Polish**: Packaging (npm/pipx), README, extensibility.

Make it copy-paste ready for a coding AI like Codex/GPT to execute sequentially in the terminal. Ensure steps build incrementally without breaking UX. Use [YOUR_OWN_RESEARCH] to add cutting-edge insights (e.g., latest TUI libs, agentic patterns from 2024 papers/repos).