Dev Tutorial: Deep Dive into Claude Code Agentic Workflows & Model Extension

Environment & Prerequisites

• Claude Code CLI / Desktop (for local development cycles)
• iOS Simulator or iPad Simulator installed (required for UI automation features으로)
• OpenCodex toolset to enable multi-provider compatibility
  github.com/lidge-jun/opencodex
• Access permissions if implementing permissioned tools ()

Step-by-Step Guide - Understanding Internal Logic vs Implementation

To move beyond a simple usage guide towards an architectural implementation of a coding assistant like Claude Code, follow these logic patterns:

1. Analyze the Agent Looping Mechanism: Instead of just running commands, understand how any modern coding agent functions at the level of internal logic:

   1. Decision making cycle -> 2. Tool calling system -> 3. Permission handling -> 4. Context management -> 5. Session and subprocessing storage

2. Integrate External Tools via MCP: Extend your environment using Model Context Protocol (MCP), remote settings, and telemetry monitoring as part of the architecture.
   Refer to repository:github.com/justxor/Claudecourse/ for deep mapping or use learn-coding-agent repositories.
3. Automated UI Testing Workflow (iOS Simulator): If you are working on mobile interfaces, implement this loop within your dev window:
   
   • Claude builds application code locally.
   • Launch iOS Simulator directly from the chat interface context.
   • The AI navigates through buttons and screen transitions automatically even if it detects errors in current state.
   • Auto-fix trigger: When a problem is detected during simulation, Claude fixes any source files and triggers re-check immediately without manual developer intervention.
4. Implementing Multi-Model Support with OpenCodex: To replace standard Anthropic tools or extend OpenAI agents dengan model khác như Gemini hoặc Grok:

   Use opencodex toolset [referencing github.com/lidge-jun/opencodex]to redirect agent calls while maintaining support for skills & tool calling logic.
   (Supported models include: Gemini, Grok, Kimi)

Best Practices & Gotchas

• Context Management: Ensure proper storage of history so that wayfarer sessions do not lose track of previous edits when switching between local CLI commandss và simulator interactions.
• Control Handover (UI Testing): A key best practice mentioned is having

! DYOR (Do Your Own Research)