feat: add extractCallGraph to PluginRegistry, derive DEFAULT_PLUGIN_CONFIG from configs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

understand-anything-plugin/packages/core/src/plugins/discovery.ts

@@ -1,3 +1,5 @@
+import { builtinLanguageConfigs } from "../languages/configs/index.js";
+
 export interface PluginEntry {
   name: string;
   enabled: boolean;
@@ -14,7 +16,9 @@ export const DEFAULT_PLUGIN_CONFIG: PluginConfig = {
     {
       name: "tree-sitter",
       enabled: true,
-      languages: ["typescript", "javascript"],
+      languages: builtinLanguageConfigs
+        .filter((c) => c.treeSitter)
+        .map((c) => c.id),
     },
   ],
 };

understand-anything-plugin/packages/core/src/plugins/registry.ts

@@ -1,4 +1,4 @@
-import type { AnalyzerPlugin, StructuralAnalysis, ImportResolution } from "../types.js";
+import type { AnalyzerPlugin, StructuralAnalysis, ImportResolution, CallGraphEntry } from "../types.js";
 import { LanguageRegistry } from "../languages/language-registry.js";
 
 /**
@@ -65,6 +65,12 @@ export class PluginRegistry {
     return plugin.resolveImports(filePath, content);
   }
 
+  extractCallGraph(filePath: string, content: string): CallGraphEntry[] | null {
+    const plugin = this.getPluginForFile(filePath);
+    if (!plugin?.extractCallGraph) return null;
+    return plugin.extractCallGraph(filePath, content);
+  }
+
   getPlugins(): AnalyzerPlugin[] {
     return [...this.plugins];
   }