Add in-memory pipeline run command

internal/core/config/effective_config_test.go

@@ -118,6 +118,51 @@ func TestResolveDigestChangesWhenEffectiveConfigChanges(t *testing.T) {
 	}
 }
 
+func TestResolveLLMProfileOverrideAppliesBeforeDigest(t *testing.T) {
+	cfg := validConfig()
+	cfg.LLMProfiles["runtime"] = LLMProfile{Provider: "openai-compatible"}
+
+	base, err := cfg.Resolve(ResolveInput{PipelineID: "example", Catalog: fakeCatalog(t)})
+	if err != nil {
+		t.Fatalf("Resolve base: %v", err)
+	}
+	effective, err := cfg.Resolve(ResolveInput{
+		PipelineID:         "example",
+		Catalog:            fakeCatalog(t),
+		LLMProfileOverride: "runtime",
+	})
+	if err != nil {
+		t.Fatalf("Resolve override: %v", err)
+	}
+
+	if base.ResolvedPipeline.Digest == effective.ResolvedPipeline.Digest {
+		t.Fatalf("expected digest to change after LLM profile override")
+	}
+	for _, binding := range resolvedBindings(effective.ResolvedPipeline) {
+		if binding.LLMProfile != "runtime" {
+			t.Fatalf("binding profile = %q, want runtime", binding.LLMProfile)
+		}
+	}
+
+	_, err = cfg.Resolve(ResolveInput{
+		PipelineID:         "example",
+		Catalog:            fakeCatalog(t),
+		LLMProfileOverride: "missing",
+	})
+	if err == nil || !strings.Contains(err.Error(), "LLM profile override") {
+		t.Fatalf("expected override profile error, got %v", err)
+	}
+}
+
+func resolvedBindings(resolved pipeline.ResolvedPipeline) []pipeline.ModuleBinding {
+	bindings := []pipeline.ModuleBinding{resolved.Input, resolved.Chunk, resolved.Output}
+	for _, lane := range resolved.ArtifactLanes {
+		bindings = append(bindings, lane.Extract, lane.Merge, lane.Normalize)
+		bindings = append(bindings, lane.Validators...)
+	}
+	return bindings
+}
+
 func TestOpenAICompatibleClientConfigRejectsIncompleteDefaultProfile(t *testing.T) {
 	cfg := Default()