Arize Builders Meetup - London - Boosting Claude Code performance with prompt learning

​Your CLAUDE.md file is more powerful than you think. In this talk, we'll walk through how we applied Prompt Learning — an RL-inspired prompt optimization technique — to improve Claude Code's performance on SWE-Bench Lite by up to 11%, purely by optimizing the system prompt instructions. No fine-tuning, no new tools, no architecture changes. Just better prompts, driven by real performance data and LLM-as-a-judge feedback.

​​We'll cover the full optimization loop (rollouts → LLM evals → meta-prompting), show results for both general coding improvement and repo-specific specialization, and share practical takeaways you can apply to your own coding agent workflows today.

​​Agenda

​​6:00 - 6:30 PM | Check-in & Networking
6:30 - 7:00 PM | Boosting Claude Code performance with Prompt Learning - Rachel-Lee Nabors, Arize AI
7:00 - 7:30 PM | Discode: Stop Wasting Tokens on Tool Schemas and Responses - Will Leeney
7:30 - 8:30 PM | Networking

​​Food and drinks will be provided. Space is limited—register soon to secure your spot!