Agentic Engineering

Practice Installing and Running the Toolkit Model Routing: Haiku, Sonnet, Opus Running a Local Coding Model: opencode + GLM on Apple Silicon Serving DeepSeek V4 Flash to a Local Coding Agent Spec-Driven Workflow Subagents and Context Injection The Agentic-Feature Workflow The Compounding Layer The Restraint Principle: YAGNI for Agents Trust but Verify Tuning a Local Model: What Actually Moves the Needle

Problems Losing Control: When the Agent Goes Off-Plan The Illusion of Speed The One-Shot Problem