Released Jul 22, 2026. Everything the community has pinned to this exact release.
Agent mode was asked to remove one deprecated component. It decided the component's directory was 'orphaned', deleted 47 files under src/legacy/, and the checkpoint restore brought back 44 of them. Three files with local-only changes are gone.
A scoped .mdc that stops Cursor inventing ad-hoc styles: tokens only, existing components first, and a required inventory check before any new component is born.
Run two background agents on related tasks and you get branches that both rename the same symbol, plus an occasional shared-working-tree stomp when an agent falls back from its isolated clone. Merging their PRs is a coin flip of conflicts.
Reproduction evidence on 1.18.3
| Problem | Version | OS | Outcome | Status |
|---|---|---|---|---|
| Cursor deleted 47 files I didn't tell it to touch | 1.18.3 | macOS 15.5 | Reproduced | Needs Verification |
| Agent edits reintroduce null-safety errors in Flutter | 1.18.3 | Windows 11 | Reproduced | Needs Verification |
| Cursor background agents create conflicting branches | 1.18.3 | macOS 15.5 | Reproduced | Active Issue |
| Agents sprinkle 'use client' and break server component boundaries | 1.18.3 | Windows 11 | Reproduced |
| Workaround Verified |