Resolve extraction reference bindings from config

internal/core/config/file_config_test.go

@@ -144,6 +144,31 @@ pipelines:
 	}
 }
 
+func TestParseFileConfigReferenceMaps(t *testing.T) {
+	cfg := parseAndApplyConfig(t, `
+version: 1
+pipelines:
+  example:
+    input: fake/input
+    references:
+      " roster ": " ./shared-roster.yml "
+    artifacts:
+      events:
+        extract: fake/extract
+        references:
+          " lore ": " ./lore.md "
+`)
+
+	profile := cfg.Pipelines["example"]
+	if !reflect.DeepEqual(profile.References, map[string]string{"roster": "./shared-roster.yml"}) {
+		t.Fatalf("pipeline references = %#v, want trimmed map", profile.References)
+	}
+	gotLaneRefs := profile.Artifacts["events"].References
+	if !reflect.DeepEqual(gotLaneRefs, map[string]string{"lore": "./lore.md"}) {
+		t.Fatalf("lane references = %#v, want trimmed map", gotLaneRefs)
+	}
+}
+
 func TestParseFileConfigValidatorMixedBindingForms(t *testing.T) {
 	cfg := parseAndApplyConfig(t, `
 version: 1
@@ -297,6 +322,58 @@ pipelines:
 	}
 }
 
+func TestApplyFileConfigRejectsDuplicateTrimmedReferenceSlots(t *testing.T) {
+	tests := []struct {
+		name string
+		raw  string
+		want string
+	}{
+		{
+			name: "pipeline",
+			raw: `
+version: 1
+pipelines:
+  example:
+    input: fake/input
+    references:
+      roster: ./first.yml
+      " roster ": ./second.yml
+`,
+			want: `pipeline "example" reference slot`,
+		},
+		{
+			name: "lane",
+			raw: `
+version: 1
+pipelines:
+  example:
+    input: fake/input
+    artifacts:
+      events:
+        extract: fake/extract
+        references:
+          roster: ./first.yml
+          " roster ": ./second.yml
+`,
+			want: `pipeline "example" lane "events" reference slot`,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			fileCfg, err := ParseFileConfigYAML([]byte(tc.raw))
+			if err != nil {
+				t.Fatalf("ParseFileConfigYAML: %v", err)
+			}
+			cfg := Default()
+			err = cfg.applyFileConfigWithLookup(fileCfg, emptyLookup)
+			if err == nil || !strings.Contains(err.Error(), tc.want) || !strings.Contains(err.Error(), "duplicated") {
+				t.Fatalf("expected duplicate reference slot error, got %v", err)
+			}
+		})
+	}
+}
+
 func TestApplyFileConfigAllowsRetryOnlyLLMProfile(t *testing.T) {
 	cfg := parseAndApplyConfig(t, `
 version: 1