Fixed a redundant path bug for previous session artifacts

internal/artifacts/artifact_resolver_test.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"os"
 	"path/filepath"
+	"reflect"
 	"strings"
 	"testing"
 	"time"
@@ -409,6 +410,17 @@ func TestResolvePreviousSessionArtifactWithCatalogFallsBackToPreparedCachePath(t
 	}
 }
 
+func TestPreviousSessionCacheCandidatePathsStripsArtifactsPrefix(t *testing.T) {
+	workspace := t.TempDir()
+	paths := buildSessionPaths(workspace, "campaign", "session")
+
+	got := previousSessionCacheCandidatePaths(paths, "artifacts/session_recap.md")
+	want := []string{filepath.Join(paths.PreviousArtifactsDir, "session_recap.md")}
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("previousSessionCacheCandidatePaths() = %#v, want %#v", got, want)
+	}
+}
+
 func TestResolvePreviousSessionArtifactWithCatalogMissingReturnsTypedError(t *testing.T) {
 	workspace := t.TempDir()
 	paths := buildSessionPaths(workspace, "campaign", "session")