scripts/

Package sites implements the literal-replacement half of the coordinated Go SDK/toolchain version bump (issue #280, design.md D-4/D-5/D-6): an explicit, enumerated registry of every plain-string Go version pin the GoRuntimeUpgrader provider cannot reach (workflow GO_VERSION env vars, Go source fallback constants, and documentation), plus a plan-then-mutate engine that resolves every registered Site before writing anything.