Cursor Composer 2.5 Ships with Substantially Improved Long-Running Task Intelligence and Complex Multi-Step Instruction Following

Cursor Changelog·medium signal

Released May 18, Composer 2.5 is Cursor's model upgrade specifically targeting the failure modes of extended agent sessions: losing context mid-task, misinterpreting compound instructions, and degrading quality on long-running work. Cursor claims 'substantial improvement in intelligence and behavior' with better sustained work quality. Combined with the earlier Cursor 3.0 parallel agent architecture, this makes Cursor's agent mode meaningfully more reliable for the multi-file refactors and feature implementations where previous versions would drift.