Nomad changes

docs/snippets/zig/plugins/pdf_only_processor.md

@@ -0,0 +1,58 @@
+```zig title="Zig"
+const std = @import("std");
+const kreuzberg = @import("kreuzberg");
+
+const PdfOnlyProcessor = struct {
+    pub fn process(self: *PdfOnlyProcessor, result: [*c]const u8, config: [*c]const u8) !void {
+        _ = self;
+        _ = result;
+        _ = config;
+        // PDF-specific transforms go here. Parse the JSON result, mutate
+        // metadata/content, and forward through the pipeline.
+    }
+
+    pub fn processing_stage(self: *PdfOnlyProcessor) [*c]const u8 {
+        _ = self;
+        return "Middle";
+    }
+
+    pub fn should_process(self: *PdfOnlyProcessor, result: [*c]const u8, config: [*c]const u8) i32 {
+        _ = self;
+        _ = config;
+        const slice = std.mem.sliceTo(result, 0);
+        return if (std.mem.indexOf(u8, slice, "\"mime_type\":\"application/pdf\"") != null) 1 else 0;
+    }
+
+    pub fn estimated_duration_ms(self: *PdfOnlyProcessor, result: [*c]const u8) u64 {
+        _ = self;
+        _ = result;
+        return 5;
+    }
+
+    pub fn priority(self: *PdfOnlyProcessor) i32 {
+        _ = self;
+        return 70;
+    }
+};
+
+pub fn main() !void {
+    var instance = PdfOnlyProcessor{};
+    var vtable = kreuzberg.make_post_processor_vtable(PdfOnlyProcessor, &instance);
+
+    vtable.name_fn = struct {
+        fn thunk(user_data: ?*anyopaque, out_name: ?*?[*c]u8) callconv(.C) void {
+            _ = user_data;
+            if (out_name) |ptr| ptr.* = @constCast("pdf-only-processor");
+        }
+    }.thunk;
+    vtable.version_fn = struct {
+        fn thunk(user_data: ?*anyopaque, out_version: ?*?[*c]u8) callconv(.C) void {
+            _ = user_data;
+            if (out_version) |ptr| ptr.* = @constCast("1.0.0");
+        }
+    }.thunk;
+
+    var out_error: ?[*c]u8 = null;
+    _ = kreuzberg.register_post_processor("pdf-only-processor", vtable, &instance, &out_error);
+}
+```