Thanks for the report - this is a known issue in version 2.2.x where the folder-based RULE.md format isn’t being recognized. As a workaround, use the legacy .mdc format by placing files directly in .cursor/rules/ (e.g., .cursor/rules/my-rule.mdc) instead of folders. The team is tracking this bug and working on a fix.
Thanks so much for this report - we found a condition where a new rules update (to support Agent Skills https://agentskills.io/ and more) would cause older rules to not load in some cases. It should be fully resolved now, even on the current versions.