ci: always validate docs and safely ignore documentation-only changes

AGENTS.md

@@ -3,7 +3,7 @@
 ## Commands
 - Check: `go build ./...`, `go vet ./...`, `go test -race ./...`, `go run github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.15.0 run ./...`; from the project root, run the TODO check below.
 - Generate: No code generation is configured; format with `gofmt -w .`.
-- Documentation: `go run go.auvem.com/corestack/cmd/docs@v0.1.0 check`; use the same pinned command with `new adr "Title"` or `new plan "Title"` to create records. Also run `go run ./cmd/docs check` to test the local implementation.
+- Documentation: `go run ./cmd/docs check`; create records with `go run ./cmd/docs new adr|plan "Title"`. This checker repository uses its local implementation as the source of truth.
 
 ## Scope and decisions
 - Before editing under a directory with its own AGENTS.md, read it. Scoped files: none; this root governs the single Go module.