Keep run logs opaque and streamline transfers

spool/artifact_queue_test.go

@@ -1,6 +1,9 @@
 package spool
 
 import (
+	"bytes"
+	"os"
+	"strings"
 	"testing"
 
 	"browser.local/run/protocol"
@@ -16,6 +19,17 @@ func TestArtifactQueueRetainsPendingAndRemovesAcknowledgedChunk(t *testing.T) {
 	if err := queue.Enqueue(first); err != nil {
 		t.Fatalf("enqueue first: %v", err)
 	}
+	metadata, err := os.ReadFile(queue.chunkPath(first))
+	if err != nil {
+		t.Fatalf("read queued metadata: %v", err)
+	}
+	if strings.Contains(string(metadata), "payload") {
+		t.Fatalf("queued artifact metadata must not JSON encode payload: %s", string(metadata))
+	}
+	storedPayload, err := os.ReadFile(artifactChunkPayloadPath(queue.chunkPath(first)))
+	if err != nil || !bytes.Equal(storedPayload, first.Payload) {
+		t.Fatalf("queued raw payload mismatch payload=%q err=%v", storedPayload, err)
+	}
 	if err := queue.Enqueue(second); err != nil {
 		t.Fatalf("enqueue second: %v", err)
 	}