diff --git a/Cargo.toml b/Cargo.toml
index 4c433a56..b44fc330 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.8.56"
+version = "0.8.57"
 edition = "2021"
 license = "MIT"
 rust-version = "1.80"
diff --git a/crates/oxide_cli/src/server/protocol.rs b/crates/oxide_cli/src/server/protocol.rs
index 595584f9..a84e680f 100644
--- a/crates/oxide_cli/src/server/protocol.rs
+++ b/crates/oxide_cli/src/server/protocol.rs
@@ -350,8 +350,13 @@ impl<R: BufRead> FrameReader<R> {
             }
 
             // 从流读一块追加到余量缓冲。
+            // 信号中断（EINTR）不视为错误：重试读，保持读循环不变式。
             let mut chunk = [0u8; 4096];
-            let n = self.inner.read(&mut chunk)?;
+            let n = match self.inner.read(&mut chunk) {
+                Ok(n) => n,
+                Err(e) if e.kind() == std::io::ErrorKind::Interrupted => continue,
+                Err(e) => return Err(e),
+            };
             if n == 0 {
                 // EOF：余量缓冲的残行原样交付（可能为空）。
                 let line = std::mem::take(&mut self.pending);