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Cursor is Anysphere's AI software development platform, combining an editor, coding models and agent execution environments. Its evolution shows how retrieval, tool use and reliable environments support coding agents.

Evals turn questions about AI quality into repeatable tests: what a system can do, where it fails, and whether a change makes it better.

Model Context Protocol gives AI applications a shared interface to external data and actions. It standardizes how applications request capabilities; builders decide how to use the returned context and which actions to allow.

Retrieval-augmented generation connects a language model to external information. Its central engineering problem is choosing evidence that helps the model answer—and checking that the answer actually uses it.