Lee Robinson
A machine learning engineer at Cursor who shared engineering practices around Recursive Self-Improvement (RSI) at the AI Engineer conference.
Timeline (last 90 days)
Lee Robinson previously served as Vice President at Vercel, then joined Cursor, and is now an engineer at SpaceX working on model behavior.
Lee Robinson used Opus 4.5 to draft a migration plan for moving the Cursor website from a headless CMS back into code, and the actual migration only took three days.
The Cursor website migration cost $260, consumed nearly 300 million tokens, involved 344 agent requests and 67 commits, with deleted code more than 7 times the amount of code added.
Lee Robinson spent five days, $287, 520 agent sessions, and 350 million tokens to build a zero-runtime-dependency Rust image compression library without writing code by hand.
During the Rust compression library project, the model autonomously ran continuously for up to three hours in a single session.
The author advises against over-optimizing workflows and recommends adding brief rule files and prompts only after a model makes a mistake.
Machine traffic accessing documentation now mostly comes from agents, and good documentation should support one-click copying as Markdown, provide a table-of-contents file for large language models, and even be built as an MCP service.
All Facts (7)
The author advises against over-optimizing workflows and recommends adding brief rule files and prompts only after a model makes a mistake.
50%UnverifiedMachine traffic accessing documentation now mostly comes from agents, and good documentation should support one-click copying as Markdown, provide a table-of-contents file for large language models, and even be built as an MCP service.
50%UnverifiedThe Cursor website migration cost $260, consumed nearly 300 million tokens, involved 344 agent requests and 67 commits, with deleted code more than 7 times the amount of code added.
50%UnverifiedLee Robinson previously served as Vice President at Vercel, then joined Cursor, and is now an engineer at SpaceX working on model behavior.
50%UnverifiedDuring the Rust compression library project, the model autonomously ran continuously for up to three hours in a single session.
50%UnverifiedLee Robinson spent five days, $287, 520 agent sessions, and 350 million tokens to build a zero-runtime-dependency Rust image compression library without writing code by hand.
50%UnverifiedLee Robinson used Opus 4.5 to draft a migration plan for moving the Cursor website from a headless CMS back into code, and the actual migration only took three days.
50%