30th September 2025 Coding agents like Anthropic’s Claude Code and OpenAI’s Codex CLI represent a genuine step change in how useful LLMs can be for producing working code. These agents can now directly exercise the code they are writing, correct errors, dig through existing implementation details, and even run experiments to find effective code solutions to problems. As is so often the case with modern AI, there is a great deal of depth involved in unlocking the full potential of these new tools...