Go 1.27 lands generic methods, ML-DSA post-quantum signatures, and encoding/json v2 as the default.

Released July 31: method declarations can finally carry their own type parameters independent of the receiver, type inference generalizes to conversions and composite literals, and size-specialized allocation cuts small-allocation (<80 byte) cost by up to 30%. For agent and service work the notable additions are a goroutineleak profile in runtime/pprof that finds permanently blocked goroutines with no experiment flag, a stdlib UUID package implementing RFC 9562, and crypto/mldsa implementing FIPS 204.