Run validation in the selected module

docs/roadmap/implementation.md

@@ -371,6 +371,18 @@ suite and reused discovery in an unchanged validation/build operation; changing
 environment inputs through an additional callback triggers fresh settings.
 Run Go-tool, validation, and candidate coordination tests.
 
+**Completed:** Go validation commands now run from the captured module
+directory. Candidate checks and publication share a lazy operation-local Go
+settings owner with their later build callbacks; standalone and managed delivery
+builds acquire separate owners. The owner reuses discovery while the inherited
+environment and selected `GOENV` file stay unchanged, and refreshes after
+consumer callbacks when either changes. Nested-module fixtures now include
+packages for selected-module validation. Verified one suite and shared discovery
+through candidate build coordination, environment and persistent-file refresh,
+nested-suite failure and sibling isolation, selected vet/compile command
+directories and compile baseline, `go test ./...`, and
+`go run ./internal/apicheck`.
+
 ## Stage 7: Build the selected module and bind output evidence
 
 **Outcome:** Standalone and composite builds use the correct declaration source,