fix extension links

Author: yolagil

.github/actions/spelling/allow.txt

@@ -1,24 +1,37 @@
 AAgent
+ACMRTUXB
 ACard
 AClient
-ACMRTUXB
-aconnect
-adk
 AError
 AFast
-agentic
 AGrpc
-aio
-aiomysql
-amannn
-aproject
 ARequest
 ARun
 AServer
 AServers
 AService
 AStarlette
 AUser
+DSNs
+EUR
+GBP
+GVsb
+INR
+JPY
+JSONRPCt
+JWS
+Llm
+POSTGRES
+RUF
+SLF
+Tful
+aconnect
+adk
+agentic
+aio
+aiomysql
+amannn
+aproject
 autouse
 backticks
 cla
@@ -29,32 +42,23 @@ coro
 datamodel
 deepwiki
 drivername
-DSNs
 dunders
 euo
-EUR
 excinfo
 fernet
 fetchrow
 fetchval
-GBP
 genai
 getkwargs
 gle
-GVsb
 ietf
 initdb
 inmemory
-INR
 isready
-JPY
-JSONRPCt
-JWS
 kwarg
 langgraph
 lifecycles
 linting
-Llm
 lstrips
 mikeas
 mockurl
@@ -64,7 +68,6 @@ oidc
 opensource
 otherurl
 postgres
-POSTGRES
 postgresql
 protoc
 pyi
@@ -74,14 +77,11 @@ pyversions
 redef
 respx
 resub
-RUF
-SLF
 socio
 sse
 tagwords
 taskupdate
 testuuid
-Tful
 tiangolo
 typeerror
 vulnz

src/a2a/utils/proto_utils.py

@@ -140,6 +140,7 @@ def message(cls, message: types.Message | None) -> a2a_pb2.Message | None:
             task_id=message.task_id or '',
             role=cls.role(message.role),
             metadata=cls.metadata(message.metadata),
+            extensions=message.extensions or [],
         )
 
     @classmethod