diff --git a/README.md b/README.md
index 6090fee..d997e9e 100644
--- a/README.md
+++ b/README.md
@@ -229,6 +229,7 @@ match logger.file_runtime_state() {
 
 - `bitlogger/`：MoonBit 库 package，本体实现、测试与 Mooncake README
 - `examples/basic/`：最小可运行示例
+- `examples/async_basic/`：基于 `moonbitlang/async` 的异步 logger 示例
 
 ## 🔗 相关文档
 
diff --git a/docs/README-en.md b/docs/README-en.md
index f4b157e..c614eae 100644
--- a/docs/README-en.md
+++ b/docs/README-en.md
@@ -213,6 +213,7 @@ match logger.file_runtime_state() {
 
 - `bitlogger/`: MoonBit library package, tests, and Mooncake package README
 - `examples/basic/`: runnable example package
+- `examples/async_basic/`: runnable async logger example built on `moonbitlang/async`
 
 ## Links
 
diff --git a/docs/changes/0.3.0.md b/docs/changes/0.3.0.md
index 053ad03..299dc5e 100644
--- a/docs/changes/0.3.0.md
+++ b/docs/changes/0.3.0.md
@@ -83,6 +83,7 @@ version 0.3.0
 - docs: update `examples/basic` to use `parse_and_build_logger(...)` with explicit error handling in `main`
 - docs: add `examples/async_basic` to show async worker startup and queue-backed logging flow
 - docs: update `examples/async_basic` to use unified JSON-driven async logger config
+- docs: refresh runnable examples to demonstrate config subtype JSON export, file policy export, and runtime file snapshot dumping
 - docs: update root README, English README, and Mooncake README with config usage notes
 - docs: document standalone JSON export helpers for reusable config subtypes
 - docs: update formatter examples to demonstrate template-based text rendering
diff --git a/examples/async_basic/main.mbt b/examples/async_basic/main.mbt
index 4a44413..05cb9b4 100644
--- a/examples/async_basic/main.mbt
+++ b/examples/async_basic/main.mbt
@@ -1,12 +1,12 @@
 async fn main {
-  let config = @lib_async.parse_async_logger_build_config_text(
-    "{\"logger\":{\"min_level\":\"info\",\"target\":\"async.demo\",\"timestamp\":true,\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"show_timestamp\":false,\"separator\":\" | \"}}},\"async_config\":{\"max_pending\":2,\"overflow\":\"DropOldest\"}}",
-  ) catch {
+  let raw = "{\"logger\":{\"min_level\":\"info\",\"target\":\"async.demo\",\"timestamp\":true,\"sink\":{\"kind\":\"text_console\",\"text_formatter\":{\"show_timestamp\":false,\"separator\":\" | \"}}},\"async_config\":{\"max_pending\":2,\"overflow\":\"DropOldest\",\"max_batch\":4,\"linger_ms\":5,\"flush\":\"Batch\"}}"
+  let config = @lib_async.parse_async_logger_build_config_text(raw) catch {
     err => {
       ignore(err)
       return
     }
   }
+  println(@lib_async.stringify_async_logger_build_config(config, pretty=true))
 
   let logger = @lib_async.build_async_logger(config)
     .with_context_fields([@lib.field("service", "bitlogger")])
@@ -20,6 +20,7 @@ async fn main {
     group.spawn_bg(allow_failure=true, () => logger.run())
     logger.info("one", fields=[@lib.field("token", "secret")])
     logger.child("worker").info("two")
+    logger.child("worker").info("three", fields=[@lib.field("batch", "yes")])
     logger.with_target("skip.demo").info("three")
     logger.shutdown()
   })
diff --git a/examples/basic/main.mbt b/examples/basic/main.mbt
index 86d479d..046dcf9 100644
--- a/examples/basic/main.mbt
+++ b/examples/basic/main.mbt
@@ -142,4 +142,45 @@ fn main {
   }
   config_logger.info("configured from json")
   ignore(config_logger.flush())
+
+  let queue_config = @lib.QueueConfig::new(4, overflow=@lib.QueueOverflowPolicy::DropOldest)
+  println(@lib.stringify_queue_config(queue_config))
+
+  let formatter_config = @lib.TextFormatterConfig::new(
+    show_timestamp=false,
+    separator=" | ",
+    field_separator=",",
+    template="[{level}] {target} {message} :: {fields}",
+  )
+  println(@lib.stringify_text_formatter_config(formatter_config))
+
+  let sink_config = @lib.SinkConfig::new(
+    kind=@lib.SinkKind::File,
+    path="bitlogger-config-demo.log",
+    append=false,
+    auto_flush=false,
+    rotation=Some(@lib.file_rotation(128, max_backups=2)),
+    text_formatter=formatter_config,
+  )
+  println(@lib.stringify_sink_config(sink_config))
+
+  let file_policy = @lib.FileSinkPolicy::new(
+    append=false,
+    auto_flush=false,
+    rotation=Some(@lib.file_rotation(64, max_backups=2)),
+  )
+  println(@lib.stringify_file_sink_policy(file_policy))
+
+  let file_runtime_logger = @lib.build_logger(
+    @lib.LoggerConfig::new(
+      sink=@lib.SinkConfig::new(kind=@lib.SinkKind::File, path="bitlogger-runtime-demo.log"),
+      queue=Some(@lib.QueueConfig::new(8)),
+    ),
+  )
+  file_runtime_logger.info("runtime file logger ready")
+  match file_runtime_logger.file_runtime_state() {
+    Some(snapshot) => println(@lib.stringify_runtime_file_state(snapshot, pretty=true))
+    None => ()
+  }
+  ignore(file_runtime_logger.file_close())
 }