diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index c040c60..8c6b398 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -1,6 +1,6 @@
 # Shared reporting and PromptKit v0.20.0 implementation plan
 
-Status: implementation in progress; Stages 1–2 complete.
+Status: implementation in progress; Stages 1–3 complete.
 
 ## Scope, authority, and execution
 
@@ -137,6 +137,10 @@ semantic except where the selected text behavior itself matters.
 
 ## Stage 3: Reporter handoff through the existing lifecycle
 
+**Complete.** Reporter handoff uses the existing delivery lifecycle. Focused
+reporter tests and the root workspace suite (`GOTOOLCHAIN=local go test ./...`
+with Go 1.27.0) passed.
+
 Add `(*Reporter).Report(Report) error`. Delegate to Stage 2 through the existing
 `RenderOutput` coordination and destination writer. Store the invocation format
 selection in reporting state; do not create another reporter or delivery state.
diff --git a/reporter.go b/reporter.go
index 6237a2a..dc4cf32 100644
--- a/reporter.go
+++ b/reporter.go
@@ -41,6 +41,7 @@ type reportingState struct {
 	diagnostics destinationState
 	closed      bool
 	mode        reportingMode
+	format      Format
 	progress    bool
 	progressSet bool
 	deferred    []deferredMessage
@@ -68,10 +69,10 @@ type deferredMessage struct {
 // reenter the same reporter, and their supplied writer is valid only while the
 // callback runs.
 //
-// Consumers use Output for substantive command results and the reporting
-// methods for categorized messages. Delivery and rendering failures are
-// retained for Outcome.Presentation even when a caller ignores an immediate
-// method's returned error.
+// Consumers use Report for formatted substantive results, Output or
+// RenderOutput for deliberate raw output, and the reporting methods for
+// categorized messages. Delivery and rendering failures are retained for
+// Outcome.Presentation even when a caller ignores an immediate method's error.
 type Reporter struct {
 	state *reportingState
 }
@@ -153,6 +154,16 @@ func (w managedOutputWriter) Write(p []byte) (int, error) {
 	return w.state.write(w.destination, p)
 }
 
+// Report renders and delivers substantive content using the invocation's
+// selected format. Rendering runs even when output is suppressed, and its
+// failures are recorded separately from the operation outcome. Report must
+// not be called from a rendering callback on the same reporter.
+func (r *Reporter) Report(report Report) error {
+	return r.RenderOutput(func(w io.Writer) error {
+		return RenderReport(w, report, r.state.format)
+	})
+}
+
 // RenderOutput coordinates a complete substantive report rendering operation.
 // The callback receives a writer usable only during the callback and must not
 // reenter this reporter. In quiet mode, the callback still runs against a
diff --git a/reporter_report_test.go b/reporter_report_test.go
new file mode 100644
index 0000000..aae645c
--- /dev/null
+++ b/reporter_report_test.go
@@ -0,0 +1,88 @@
+package commandkit
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"io"
+	"strings"
+	"testing"
+)
+
+func TestReporterReportQuietAndClosed(t *testing.T) {
+	var out bytes.Buffer
+	reporter := newReporter(Streams{Out: &out})
+	reporter.state.mode = modeQuiet
+	err := reporter.Report(Report{Value: make(chan int)})
+	if err == nil {
+		t.Fatal("expected serialization error")
+	}
+	outcome := reporter.finalize(Success(), nil)
+	if outcome.Presentation.Output.RenderError == nil || out.Len() != 0 {
+		t.Fatalf("outcome %#v, output %q", outcome, &out)
+	}
+	if err := reporter.Report(Report{Value: "late"}); !errors.Is(err, ErrReporterClosed) {
+		t.Fatalf("got %v", err)
+	}
+}
+
+func TestReporterReportPreservesOperationAndDeliveryEvidence(t *testing.T) {
+	writeErr := errors.New("output unavailable")
+	cause := errors.New("domain cause")
+	for _, tc := range []struct {
+		name      string
+		operation Outcome
+		want      OutcomeKind
+		status    int
+	}{
+		{"success", Success(), OutcomeOperational, 1},
+		{"domain", Domain("differences", 3).WithCause(cause), OutcomeDomain, 3},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			reporter := newReporter(Streams{Out: reportErrorWriter{writeErr}})
+			if err := reporter.Report(Report{Value: "result"}); !errors.Is(err, writeErr) {
+				t.Fatalf("report error %v", err)
+			}
+			got := reporter.finalize(tc.operation, nil)
+			if got.Kind != tc.want || got.Status != tc.status || !errors.Is(got.Presentation.Output.WriteError, writeErr) {
+				t.Fatalf("outcome %#v", got)
+			}
+			if tc.name == "domain" && !errors.Is(got.Cause, cause) {
+				t.Fatalf("cause %#v", got.Cause)
+			}
+		})
+	}
+}
+
+func TestReporterReportAfterCancellation(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	command := NewCommand(CommandSpec[struct{}]{Name: "run", Run: func(inv Invocation, _ struct{}) Outcome {
+		cancel()
+		if err := inv.Reporter().Report(Report{Value: "acquired"}); err != nil {
+			t.Errorf("report: %v", err)
+		}
+		return Failure("canceled").WithCause(ctx.Err())
+	}})
+	app, err := New(Identity{Name: "Example"}, command)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var out bytes.Buffer
+	result := app.Execute(ctx, []string{"run"}, Streams{Out: &out, Err: io.Discard})
+	if !strings.Contains(out.String(), "acquired") || !errors.Is(result.Cause, context.Canceled) {
+		t.Fatalf("outcome %#v, output %q", result, &out)
+	}
+}
+
+func TestReporterUsesSelectedFormat(t *testing.T) {
+	var out bytes.Buffer
+	reporter := newReporter(Streams{Out: &out})
+	reporter.state.format = FormatJSON
+	if err := reporter.Report(Report{Value: "value"}); err != nil {
+		t.Fatal(err)
+	}
+	if out.String() != "\"value\"\n" {
+		t.Fatalf("got %q", &out)
+	}
+}