fix: handle rate_limit_event message type

src/claude_agent_sdk/_internal/message_parser.py

@@ -8,6 +8,7 @@
     AssistantMessage,
     ContentBlock,
     Message,
+    RateLimitEvent,
     ResultMessage,
     StreamEvent,
     SystemMessage,
@@ -176,5 +177,20 @@ def parse_message(data: dict[str, Any]) -> Message:
                     f"Missing required field in stream_event message: {e}", data
                 ) from e
 
+        case "rate_limit_event":
+            try:
+                return RateLimitEvent(
+                    type=data["type"],
+                    session_id=data["session_id"],
+                    limit_type=data.get("limit_type"),
+                    limit=data.get("limit"),
+                    remaining=data.get("remaining"),
+                    reset_at=data.get("reset_at"),
+                )
+            except KeyError as e:
+                raise MessageParseError(
+                    f"Missing required field in rate_limit_event message: {e}", data
+                ) from e
+
         case _:
             raise MessageParseError(f"Unknown message type: {message_type}", data)

src/claude_agent_sdk/types.py

@@ -693,7 +693,19 @@ class StreamEvent:
     parent_tool_use_id: str | None = None
 
 
-Message = UserMessage | AssistantMessage | SystemMessage | ResultMessage | StreamEvent
+@dataclass
+class RateLimitEvent:
+    """Rate limit event from Claude Code CLI."""
+
+    type: str
+    session_id: str
+    limit_type: str | None = None
+    limit: int | None = None
+    remaining: int | None = None
+    reset_at: str | None = None
+
+
+Message = UserMessage | AssistantMessage | SystemMessage | ResultMessage | StreamEvent | RateLimitEvent
 
 
 class ThinkingConfigAdaptive(TypedDict):