The Go Collections working group proposes standard-library sets, hash maps, and ordered maps for Go 1.28

Sources: primary, discussion
Summary: The Go Collections working group filed a proposal to add sets, hash maps, and ordered maps to the standard library for Go 1.28. The item is a proposal under discussion, not an accepted change.
Why it matters: A canonical set type in the standard library sets the convention that new Go APIs are expected to follow, which is broader migration pressure than any single package release.
Follow-up: Track the proposal review outcome and whether it lands in the Go 1.28 cycle.