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docs/snippets/wasm/plugins/plugin_logging.md

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+# Plugin Logging and Debugging
+
+Log plugin registration and execution for debugging purposes.
+
+```typescript title="WASM"
+import init, {
+  registerPostProcessor,
+  registerValidator,
+  registerOcrBackend,
+  listPostProcessors,
+  listValidators,
+  listOcrBackends,
+} from "kreuzberg-wasm";
+
+await init();
+
+// Track plugin registrations
+const pluginLog = {
+  processors: [],
+  validators: [],
+  ocrBackends: [],
+};
+
+// Register a logging post-processor
+const loggingProcessor = {
+  processingStage: () => "post-extraction",
+  process: (result) => {
+    console.log("[POST-PROCESSOR] Processing extraction result", {
+      textLength: result.text?.length,
+      hasMetadata: !!result.metadata,
+    });
+    return result;
+  },
+};
+
+registerPostProcessor(loggingProcessor);
+pluginLog.processors.push("loggingProcessor");
+
+// Register a logging validator
+const loggingValidator = {
+  validate: (result) => {
+    console.log("[VALIDATOR] Validating extraction result", {
+      textLength: result.text?.length,
+      isValid: true,
+    });
+    return { valid: true, error: null };
+  },
+};
+
+registerValidator(loggingValidator);
+pluginLog.validators.push("loggingValidator");
+
+// Log registered plugins
+function logPluginStatus() {
+  const processors = listPostProcessors();
+  const validators = listValidators();
+  const backends = listOcrBackends();
+
+  console.log("Plugin Registration Status:", {
+    postProcessors: processors,
+    validators: validators,
+    ocrBackends: backends,
+    total: processors.length + validators.length + backends.length,
+  });
+}
+
+logPluginStatus();
+```
+
+Use this pattern to monitor and debug plugin lifecycle and execution.