diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..1a7331f
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+/devcert/** -linguist-detectable
diff --git a/Cargo.toml b/Cargo.toml
index 7fefac0..e38eb20 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,15 +10,15 @@ members = [
 ]
 
 [workspace.package]
-version = "0.1.0"
+version = "0.2.0"
 edition = "2024"
 authors = ["shellrow <shellrow@foctal.com>"]
 
 [workspace.dependencies]
-webtrans-proto = { path = "webtrans-proto", version = "0.1.0" }
-webtrans-trait = { path = "webtrans-trait", version = "0.1.0" }
-webtrans-quinn = { path = "webtrans-quinn", version = "0.1.0" }
-webtrans-wasm = { path = "webtrans-wasm", version = "0.1.0" }
+webtrans-proto = { path = "webtrans-proto", version = "0.2.0" }
+webtrans-trait = { path = "webtrans-trait", version = "0.2.0" }
+webtrans-quinn = { path = "webtrans-quinn", version = "0.2.0" }
+webtrans-wasm = { path = "webtrans-wasm", version = "0.2.0" }
 bytes = "1"
 thiserror = "2"
 http = "1"
diff --git a/webtrans-proto/src/frame.rs b/webtrans-proto/src/frame.rs
index e7731c4..e08984b 100644
--- a/webtrans-proto/src/frame.rs
+++ b/webtrans-proto/src/frame.rs
@@ -48,20 +48,14 @@ impl Frame {
 
         Ok((typ, limit))
     }
-}
 
-macro_rules! frames {
-    {$($name:ident = $val:expr,)*} => {
-        impl Frame {
-            $(pub const $name: Frame = Frame(VarInt::from_u32($val));)*
-        }
+    pub const fn from_u32(value: u32) -> Self {
+        Self(VarInt::from_u32(value))
     }
-}
 
-// Frames sent at the start of a bidirectional stream.
-frames! {
-    DATA = 0x00,
-    HEADERS = 0x01,
-    SETTINGS = 0x04,
-    WEBTRANSPORT = 0x41,
+    // Frames sent at the start of a bidirectional stream.
+    pub const DATA: Frame = Frame::from_u32(0x00);
+    pub const HEADERS: Frame = Frame::from_u32(0x01);
+    pub const SETTINGS: Frame = Frame::from_u32(0x04);
+    pub const WEBTRANSPORT: Frame = Frame::from_u32(0x41);
 }
diff --git a/webtrans-proto/src/settings.rs b/webtrans-proto/src/settings.rs
index d581fa0..28df2b0 100644
--- a/webtrans-proto/src/settings.rs
+++ b/webtrans-proto/src/settings.rs
@@ -64,31 +64,27 @@ impl Debug for Setting {
     }
 }
 
-macro_rules! settings {
-    {$($name:ident = $val:expr,)*} => {
-        impl Setting {
-            $(pub const $name: Setting = Setting(VarInt::from_u32($val));)*
-        }
+impl Setting {
+    pub const fn from_u32(value: u32) -> Self {
+        Self(VarInt::from_u32(value))
     }
-}
 
-settings! {
     // HTTP/3 settings that WebTransport ignores.
-    QPACK_MAX_TABLE_CAPACITY = 0x1, // Default is 0, which disables the dynamic table.
-    MAX_FIELD_SECTION_SIZE = 0x6,
-    QPACK_BLOCKED_STREAMS = 0x7,
+    pub const QPACK_MAX_TABLE_CAPACITY: Setting = Setting::from_u32(0x1); // Default is 0, which disables the dynamic table.
+    pub const MAX_FIELD_SECTION_SIZE: Setting = Setting::from_u32(0x6);
+    pub const QPACK_BLOCKED_STREAMS: Setting = Setting::from_u32(0x7);
 
     // Both values are required for WebTransport.
-    ENABLE_CONNECT_PROTOCOL = 0x8,
-    ENABLE_DATAGRAM = 0x33,
-    ENABLE_DATAGRAM_DEPRECATED = 0xFFD277, // Still used by some Chrome versions.
+    pub const ENABLE_CONNECT_PROTOCOL: Setting = Setting::from_u32(0x8);
+    pub const ENABLE_DATAGRAM: Setting = Setting::from_u32(0x33);
+    pub const ENABLE_DATAGRAM_DEPRECATED: Setting = Setting::from_u32(0xFFD277); // Still used by some Chrome versions.
 
     // Removed in draft-06.
-    WEBTRANSPORT_ENABLE_DEPRECATED = 0x2b603742,
-    WEBTRANSPORT_MAX_SESSIONS_DEPRECATED = 0x2b603743,
+    pub const WEBTRANSPORT_ENABLE_DEPRECATED: Setting = Setting::from_u32(0x2b603742);
+    pub const WEBTRANSPORT_MAX_SESSIONS_DEPRECATED: Setting = Setting::from_u32(0x2b603743);
 
     // Current way to enable WebTransport.
-    WEBTRANSPORT_MAX_SESSIONS = 0xc671706a,
+    pub const WEBTRANSPORT_MAX_SESSIONS: Setting = Setting::from_u32(0xc671706a);
 }
 
 #[derive(Error, Debug, Clone)]
diff --git a/webtrans-proto/src/stream.rs b/webtrans-proto/src/stream.rs
index c8cd3c4..cc209de 100644
--- a/webtrans-proto/src/stream.rs
+++ b/webtrans-proto/src/stream.rs
@@ -28,20 +28,14 @@ impl UniStream {
             (val - 0x21) % 0x1f == 0
         }
     }
-}
 
-macro_rules! streams_uni {
-    {$($name:ident = $val:expr,)*} => {
-        impl UniStream {
-            $(pub const $name: UniStream = UniStream(VarInt::from_u32($val));)*
-        }
+    pub const fn from_u32(value: u32) -> Self {
+        Self(VarInt::from_u32(value))
     }
-}
 
-streams_uni! {
-    CONTROL = 0x00,
-    PUSH = 0x01,
-    QPACK_ENCODER = 0x02,
-    QPACK_DECODER = 0x03,
-    WEBTRANSPORT = 0x54,
+    pub const CONTROL: UniStream = UniStream::from_u32(0x00);
+    pub const PUSH: UniStream = UniStream::from_u32(0x01);
+    pub const QPACK_ENCODER: UniStream = UniStream::from_u32(0x02);
+    pub const QPACK_DECODER: UniStream = UniStream::from_u32(0x03);
+    pub const WEBTRANSPORT: UniStream = UniStream::from_u32(0x54);
 }
diff --git a/webtrans-quinn/src/lib.rs b/webtrans-quinn/src/lib.rs
index 0ddaadc..a9af093 100644
--- a/webtrans-quinn/src/lib.rs
+++ b/webtrans-quinn/src/lib.rs
@@ -1,7 +1,7 @@
 //! Native WebTransport implementation built on top of QUIC using Quinn.
 //!
-//! This crate provides a low-level, QUIC WebTransport API for native environments. 
-//! 
+//! This crate provides a low-level, QUIC WebTransport API for native environments.
+//!
 //! The implementation is powered by [`quinn`], and most transport-level
 //! behavior (congestion control, flow control, crypto, etc.) is delegated
 //! directly to Quinn.
diff --git a/webtrans-quinn/src/session.rs b/webtrans-quinn/src/session.rs
index a5375d9..627a1f6 100644
--- a/webtrans-quinn/src/session.rs
+++ b/webtrans-quinn/src/session.rs
@@ -20,6 +20,28 @@ use crate::{
 
 use webtrans_proto::{Frame, UniStream, VarInt};
 
+fn is_graceful_close(e: &webtrans_proto::CapsuleError) -> bool {
+    use std::io::ErrorKind;
+
+    match e {
+        webtrans_proto::CapsuleError::Io(ioe) => {
+            matches!(
+                ioe.kind(),
+                ErrorKind::UnexpectedEof
+                    | ErrorKind::BrokenPipe
+                    | ErrorKind::ConnectionReset
+                    | ErrorKind::ConnectionAborted
+                    | ErrorKind::NotConnected
+            ) || ioe
+                .to_string()
+                .to_ascii_lowercase()
+                .contains("connection lost")
+        }
+        webtrans_proto::CapsuleError::UnexpectedEnd => true,
+        _ => false,
+    }
+}
+
 /// An established WebTransport session, acting like a full QUIC connection. See [`quinn::Connection`].
 ///
 /// Remember that WebTransport is layered on top of QUIC:
@@ -84,14 +106,39 @@ impl Session {
         };
 
         // Run a background task to detect CONNECT stream closure.
-        let mut this2 = this.clone();
+        let this2 = this.clone();
         tokio::spawn(async move {
-            let (code, reason) = this2.run_closed(connect).await;
-            tracing::debug!(
-                "closing QUIC connection after WebTransport close: code={code} reason={reason}"
-            );
-            if this2.conn.close_reason().is_none() {
-                this2.conn.close(0u32.into(), reason.as_bytes());
+            match this2.run_closed(connect).await {
+                Ok(Some((code, reason))) => {
+                    tracing::debug!("WebTransport close received: code={code} reason={reason}");
+                    if this2.conn.close_reason().is_none() {
+                        this2.close(code, reason.as_bytes());
+                    }
+                }
+                Ok(None) => {
+                    if let Some(reason) = this2.conn.close_reason() {
+                        let se: crate::SessionError = reason.into();
+                        tracing::debug!("CONNECT stream ended: {se}");
+                    } else {
+                        tracing::debug!("CONNECT stream ended without CloseWebTransportSession");
+                    }
+                }
+                Err(e) if is_graceful_close(&e) => {
+                    if let Some(reason) = this2.conn.close_reason() {
+                        let se: crate::SessionError = reason.into();
+                        tracing::debug!(
+                            "CONNECT stream closed after QUIC close: {se} (capsule={e})"
+                        );
+                    } else {
+                        tracing::debug!("CONNECT stream closed: {e}");
+                    }
+                }
+                Err(e) => {
+                    tracing::debug!("CONNECT stream error: {e}");
+                    if this2.conn.close_reason().is_none() {
+                        this2.close(1, b"capsule error");
+                    }
+                }
             }
         });
 
@@ -99,20 +146,22 @@ impl Session {
     }
 
     // Keep reading from the control stream until it closes.
-    async fn run_closed(&mut self, connect: Connect) -> (u32, String) {
+    async fn run_closed(
+        &self,
+        connect: Connect,
+    ) -> Result<Option<(u32, String)>, webtrans_proto::CapsuleError> {
         let (_send, mut recv) = connect.into_inner();
 
         loop {
             match webtrans_proto::Capsule::read(&mut recv).await {
                 Ok(webtrans_proto::Capsule::CloseWebTransportSession { code, reason }) => {
-                    return (code, reason);
+                    return Ok(Some((code, reason)));
                 }
                 Ok(webtrans_proto::Capsule::Unknown { typ, payload }) => {
                     tracing::warn!("unknown capsule: type={typ} size={}", payload.len());
                 }
-                Err(_) => {
-                    return (1, "capsule error".to_string());
-                }
+                Err(e) if is_graceful_close(&e) => return Ok(None),
+                Err(e) => return Err(e),
             }
         }
     }
@@ -250,10 +299,11 @@ impl Session {
 
     /// Immediately close the connection with an error code and reason. See [`quinn::Connection::close`].
     pub fn close(&self, code: u32, reason: &[u8]) {
-        let code = if self.session_id.is_some() {
-            webtrans_proto::error_to_http3(code).try_into().unwrap()
+        let code: quinn::VarInt = if self.session_id.is_some() {
+            let mapped = webtrans_proto::error_to_http3(code);
+            quinn::VarInt::from_u64(mapped).unwrap_or(quinn::VarInt::from_u32(1))
         } else {
-            code.into()
+            quinn::VarInt::from_u32(code)
         };
 
         self.conn.close(code, reason)
diff --git a/webtrans/Cargo.toml b/webtrans/Cargo.toml
index 7b3985c..a7b392b 100644
--- a/webtrans/Cargo.toml
+++ b/webtrans/Cargo.toml
@@ -14,10 +14,10 @@ license = "MIT"
 webtrans-proto = { workspace = true }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-webtrans-quinn = { version = "0.1.0", path = "../webtrans-quinn" }
+webtrans-quinn = { workspace = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-webtrans-wasm = { version = "0.1.0", path = "../webtrans-wasm" }
+webtrans-wasm = { workspace = true }
 
 [dev-dependencies]
 anyhow = "1"
diff --git a/webtrans/examples/echo-client.rs b/webtrans/examples/echo-client.rs
index 17dc4d7..6dc9531 100644
--- a/webtrans/examples/echo-client.rs
+++ b/webtrans/examples/echo-client.rs
@@ -80,6 +80,10 @@ async fn main() -> anyhow::Result<()> {
     session.close(42069, b"bye");
     session.closed().await;
 
+    tracing::info!("session closed");
+    tracing::info!("waiting a moment to ensure close");
+    tokio::time::sleep(std::time::Duration::from_millis(100)).await;
+
     Ok(())
 }