internal/

Package decodeerr reduces an encoding/json/v2 decode error to the parts of it that are safe and stable to hand a client (SONNY-4078).

Package ratebucket is the canonical mutex-guarded token bucket shared by the rate-limiters that previously each carried a byte-identical private copy of this algorithm (securex.Bucket, mcpx's bucket, httpx's tokenBucket) — QG-046/QG-059/PERF-0044.