diff --git a/go/delivery/history_records.go b/go/delivery/history_records.go
index 8f8f23a..fd4b5bd 100644
--- a/go/delivery/history_records.go
+++ b/go/delivery/history_records.go
@@ -179,6 +179,10 @@ type BuildLogEntry struct {
 	// sorted and each once, as the build module answered them (BuildAnswer.Imports; novox/hq ADR 0593 §2): the indexer
 	// keeps them on the module (KeptInputs2.Imports) when the build's fingerprint is the module's.
 	Imports []string `json:"imports,omitempty"`
+	// OutOfStep are, at a build's end, the generated files its test step found out of step with what their generator
+	// writes, as the build module answered them (its test step's `out-of-step`): the indexer raises a finding naming them
+	// for a trunk build, and only a clean build of the same module clears it. A start or a narration names none.
+	OutOfStep []string `json:"out-of-step,omitempty"`
 	// Line is a narration's words, Why what it narrates (asked, waiting, stored, refused): a build.said entry's alone.
 	Line string `json:"line,omitempty"`
 	Why  string `json:"why,omitempty"`
@@ -225,8 +229,8 @@ func EncodeBuildLogEntry(e BuildLogEntry) ([]byte, error) {
 		switch {
 		case e.Module == "" || e.FP == "" || e.At.IsZero() || e.Line == "":
 			return nil, fmt.Errorf("delivery: a build's narration names its module, fingerprint, line and time")
-		case e.Outcome != "" || len(e.Made) > 0 || e.Manifest != "" || len(e.Against) > 0 || len(e.Imports) > 0:
-			return nil, fmt.Errorf("delivery: a build's narration names no outcome, manifest, base, artifact or import")
+		case e.Outcome != "" || len(e.Made) > 0 || e.Manifest != "" || len(e.Against) > 0 || len(e.Imports) > 0 || len(e.OutOfStep) > 0:
+			return nil, fmt.Errorf("delivery: a build's narration names no outcome, manifest, base, artifact, import or file out of step")
 		}
 		return json.Marshal(e)
 	case e.Event != BuildStartedEvent && e.Event != BuildEndedEvent:
@@ -237,8 +241,9 @@ func EncodeBuildLogEntry(e BuildLogEntry) ([]byte, error) {
 		return nil, fmt.Errorf("delivery: a build log entry names its module, fingerprint, repository, commit, node and time")
 	case e.Event == BuildEndedEvent && e.Outcome == "":
 		return nil, fmt.Errorf("delivery: a build's end names its outcome")
-	case e.Event == BuildStartedEvent && (e.Outcome != "" || len(e.Made) > 0 || e.Manifest != "" || len(e.Against) > 0 || len(e.Imports) > 0):
-		return nil, fmt.Errorf("delivery: a build's start names no outcome, manifest, base, artifact or import")
+	case e.Event == BuildStartedEvent && (e.Outcome != "" || len(e.Made) > 0 || e.Manifest != "" || len(e.Against) > 0 || len(e.Imports) > 0 ||
+		len(e.OutOfStep) > 0):
+		return nil, fmt.Errorf("delivery: a build's start names no outcome, manifest, base, artifact, import or file out of step")
 	}
 	if err := CheckImports(e.Imports); err != nil {
 		return nil, err
diff --git a/go/delivery/published_packages_test.go b/go/delivery/published_packages_test.go
index bd44b58..773f022 100644
--- a/go/delivery/published_packages_test.go
+++ b/go/delivery/published_packages_test.go
@@ -57,17 +57,23 @@ func TestPublishedPackagesAndImportsRoundTripAndRefuse(t *testing.T) {
 	}
 
 	imports := []string{sdk, sdk + "/announce"}
+	outOfStep := []string{"go/seats/meshbroker/contract.go", "ts/seats/meshbroker/src/index.ts"}
 	end := BuildLogEntry{Event: BuildEndedEvent, Module: "netcheck", FP: "src2:x", Repository: "novox/mesh-catalog", Commit: commit,
-		Node: "ace", At: good.At, Outcome: "done", Imports: imports}
+		Node: "ace", At: good.At, Outcome: "done", Imports: imports, OutOfStep: outOfStep}
 	raw, err = EncodeBuildLogEntry(end)
 	if err != nil {
 		t.Fatal(err)
 	}
-	if e, err := DecodeBuildLogEntry(raw); err != nil || !reflect.DeepEqual(e.Imports, imports) {
-		t.Fatalf("build end round trip: %v, %v", err, e.Imports)
+	if e, err := DecodeBuildLogEntry(raw); err != nil || !reflect.DeepEqual(e.Imports, imports) || !reflect.DeepEqual(e.OutOfStep, outOfStep) ||
+		!strings.Contains(string(raw), `"out-of-step":["go/seats/meshbroker/contract.go",`) {
+		t.Fatalf("build end round trip: %v, %v, %v in %s", err, e.Imports, e.OutOfStep, raw)
 	}
 	start := end
-	start.Event, start.Outcome = BuildStartedEvent, ""
+	start.Event, start.Outcome, start.Imports = BuildStartedEvent, "", nil
+	if _, err := EncodeBuildLogEntry(start); err == nil {
+		t.Error("a build's start with files out of step encoded")
+	}
+	start.Imports, start.OutOfStep = imports, nil
 	if _, err := EncodeBuildLogEntry(start); err == nil {
 		t.Error("a build's start with imports encoded")
 	}
@@ -87,6 +93,7 @@ func TestPublishedPackagesAndImportsRoundTripAndRefuse(t *testing.T) {
 	for name, mutate := range map[string]func(e *BuildLogEntry){
 		"a narration with no line":    func(e *BuildLogEntry) { e.Line = "" },
 		"a narration with an outcome": func(e *BuildLogEntry) { e.Outcome = "done" },
+		"a narration out of step":     func(e *BuildLogEntry) { e.OutOfStep = outOfStep },
 		"an end with a line": func(e *BuildLogEntry) {
 			e.Event, e.Outcome, e.Node, e.Repository, e.Commit = BuildEndedEvent, "done", "ace", "novox/mesh-catalog", commit
 		},