Nomad changes

docs/snippets/kotlin/plugins/pdf_metadata_extractor.md

@@ -0,0 +1,38 @@
+```kotlin title="Kotlin"
+import dev.kreuzberg.*
+import java.util.concurrent.atomic.AtomicInteger
+
+class PdfMetadataExtractor : IPostProcessor {
+    private val processed = AtomicInteger(0)
+
+    override fun name(): String = "pdf-metadata-extractor"
+    override fun version(): String = "1.0.0"
+
+    override fun process(result: ExtractionResult, config: ExtractionConfig) {
+        if (result.mimeType() != "application/pdf") return
+
+        val count = processed.incrementAndGet()
+        val metadata: Metadata = result.metadata()
+        // Metadata is an immutable record — read PDF metadata fields rather
+        // than mutate. Reporting via stdout/log keeps the snippet honest.
+        println(
+            "[pdf-metadata] #$count title=${metadata.title()} authors=${metadata.authors()}",
+        )
+    }
+
+    override fun processing_stage(): ProcessingStage = ProcessingStage.Late
+
+    override fun should_process(
+        _result: ExtractionResult,
+        _config: ExtractionConfig,
+    ): Boolean = _result.mimeType() == "application/pdf"
+
+    override fun estimated_duration_ms(_result: ExtractionResult): Long = 2L
+
+    override fun priority(): Int = 25
+}
+
+fun registerPdfMetadataExtractor() {
+    PostProcessorBridge.registerPostProcessor(PdfMetadataExtractor())
+}
+```