test: cover stdin dispatch ordering

internal/server/store/command_test.go

@@ -126,6 +126,37 @@ func TestClaimDispatchExpiresAndFencesRequeue_HP_DISPATCH_02(t *testing.T) {
 	}
 }
 
+func TestPendingStdinWaitsForDurableDispatch_HP_DISPATCH_06(t *testing.T) {
+	t.Parallel()
+	ctx := context.Background()
+	opened, err := Open(ctx, Options{DataDir: filepath.Join(t.TempDir(), "state"), BusyTimeout: time.Second})
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = opened.Close() })
+	now := time.Date(2026, time.September, 11, 8, 50, 0, 0, time.UTC)
+	if _, err := opened.RegisterClientSession(ctx, ClientRegistration{ClientID: "stdin-client", Platform: 2, Architecture: "amd64", DaemonVersion: "test", DaemonCWD: `C:\\`, SupportedShells: []byte{1}, ClientInstanceID: [16]byte{41}, SessionID: [16]byte{42}, ConnectedAt: now}); err != nil {
+		t.Fatal(err)
+	}
+	issue := fixedStoreIssue(0x97)
+	if _, err := opened.QueueCommand(ctx, QueueCommandInput{IssueUUID: issue, ClientID: "stdin-client", IssueTime: now, ReceiptTime: now, ImmutableSHA256: sha256.Sum256([]byte("stdin ordering")), ExecutionSpec: []byte("spec")}); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := opened.AppendStdin(ctx, StdinWriteInput{IssueUUID: issue, ClientID: "stdin-client", RequestUUID: fixedStoreIssue(0x98), Data: []byte("input"), ImmutableHash: sha256.Sum256([]byte("stdin append")), OccurredAt: now}); err != nil {
+		t.Fatal(err)
+	}
+	if pending, err := opened.PendingStdin(ctx, "stdin-client"); err != nil || len(pending) != 0 {
+		t.Fatalf("queued command exposed stdin = %#v, %v", pending, err)
+	}
+	if candidate, err := opened.ClaimNextDispatch(ctx, "stdin-client", 7, now); err != nil || candidate == nil || candidate.IssueUUID != issue {
+		t.Fatalf("dispatch claim = %#v, %v", candidate, err)
+	}
+	pending, err := opened.PendingStdin(ctx, "stdin-client")
+	if err != nil || len(pending) != 1 || pending[0].IssueUUID != issue || pending[0].WriteSeq != 1 || string(pending[0].Data) != "input" {
+		t.Fatalf("dispatched command stdin = %#v, %v", pending, err)
+	}
+}
+
 func TestLateDispatchAcceptanceAndEventRetainExpiryContradiction_BH_DISPATCH_09(t *testing.T) {
 	t.Parallel()
 	ctx := context.Background()

test/coverage.toml

@@ -637,6 +637,12 @@ layer = "unit"
 status = "implemented"
 tests = ["internal/observability/rotate_test.go:TestFormatLogWritesStructuredBoundedRecords_HP_OPS_04"]
 
+[[requirements]]
+id = "HP-DISPATCH-10"
+layer = "unit"
+status = "implemented"
+tests = ["internal/server/store/command_test.go:TestPendingStdinWaitsForDurableDispatch_HP_DISPATCH_06"]
+
 [[requirements]]
 id = "HP-STORE-01"
 layer = "integration"