TypeScript

TypeScript has no dedicated known-issues file. The issue tracker filtered to the official “Known Issue” label is the canonical location, and the TypeScript team uses that label with discipline.

Useful when a type-inference behavior reads as a bug. Filtering the tracker by “Known Issue” tells you whether the team has already acknowledged the case and what the planned fix or workaround is. Sometimes the answer is “this is intended behavior under the variance rules”; sometimes it is “yes, planned for 5.x.”