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Title: Wrap JSONRPC messages with SessionMessage for metadata support by ihrpr · Pull Request #590 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: Wrap JSONRPC messages with SessionMessage for metadata support by ihrpr · Pull Request #590 · modelcontextprotocol/python-sdk

X Title: Wrap JSONRPC messages with SessionMessage for metadata support by ihrpr · Pull Request #590 · modelcontextprotocol/python-sdk

Description: This PR introduces the SessionMessage type to encapsulate JSONRPC messages with metadata. This change enables clean separation between protocol messages and transport concerns. Problem Previously, memory streams propagated raw JSONRPCMessage objects, which made it difficult to pass transport-specific metadata (like resumption tokens or request correlation IDs) without violating the JSONRPC spec. Proposed solution Introduced a new SessionMessage type that wraps JSONRPCMessage with optional metadata: class SessionMessage: message: JSONRPCMessage metadata: MessageMetadata = None With specialized metadata types: ClientMessageMetadata: Contains resumption_token for client-side resumability and will contain additional fields needed for resumability ServerMessageMetadata: Contains related_request_id for server-side request correlation Changes All memory streams now use SessionMessage instead of raw JSONRPCMessage Session classes extract the underlying JSONRPC message for protocol operations Transport implementations now can use metadata for transport-specific features: NOTE: stacked on top of #587

Open Graph Description: This PR introduces the SessionMessage type to encapsulate JSONRPC messages with metadata. This change enables clean separation between protocol messages and transport concerns. Problem Previously, ...

X Description: This PR introduces the SessionMessage type to encapsulate JSONRPC messages with metadata. This change enables clean separation between protocol messages and transport concerns. Problem Previously, ...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/590

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Wrap JSONRPC messages with SessionMessage for metadata support https://github.com/modelcontextprotocol/python-sdk/pull/590/files#top
Show all changes 59 commits https://github.com/modelcontextprotocol/python-sdk/pull/590/files
2b95598 initial streamable http server ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/2b9559864b772757f1f4a0f7f0b4f08272829f3b
3d790f8 add request validation and tests ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/3d790f8979bfd43d505151e024433b533376946b
27bc01e session management ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/27bc01ec4bb63f398316ed7648dbc99108e0176f
3c4cf10 terminations of a session ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/3c4cf109c2534306105ed7d656bcfe5eacd0d2c0
bce74b3 fix cleaning up ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/bce74b3e148038a38324d730d5506aac055b6e05
2011579 add happy path test ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/201157912d1d588283ed91fd05567b8b003ef891
2cebf08 tests ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/2cebf087d6b5e965198b8a3bf57248cf8aa7aa31
6c9c320 json mode ihrpr Apr 20, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/6c9c320a38654c9145fe326d9e308e2893e8d9e3
ede8cde clean up ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/ede8cde91c938db4a64bcccb78387bc79e713d86
2a3bed8 fix example server ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/2a3bed8e50d19a572ad3fe9a82e2ad347d2d1c57
0456b1b return 405 for get stream ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/0456b1bd1c8f5dd2eaf6650ac8b23413c6614322
97ca48d speed up tests ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/97ca48dc2dd00ca56e99b955c04151084c1d3801
f738cbf stateless implemetation ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/f738cbfca5cb9bb94aabe8e762b71a736e21c33e
92d4287 format ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/92d42875746f8b417b9b981de9ec491e1178c6be
aa9f6e5 uv lock ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/aa9f6e5f3dac9808a830da9ceba17392635a1c42
2fba7f3 Merge branch 'ihrpr/streamablehttp-server' into ihrpr/streamablehttp-… ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/2fba7f30b13f3ed7bf97c5a64a600bcb6385fd76
45723ea simplify readme ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/45723eab97027f50071373c470258cb7c5778854
6b7a616 clean up ihrpr Apr 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/6b7a616a6e5a51b1ba3102d10693c0dee28bf1d2
b1be691 get sse ihrpr Apr 22, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/b1be6913953bebcecd8490b67c542c768321b465
201ec99 uv lock ihrpr Apr 22, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/201ec99ce66492db8beaca29802dc6ca1dcbaf80
46ec72d clean up ihrpr Apr 22, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/46ec72d0ecdf0b6fe01699c7ccff4d2ed65aa31c
1902abb Merge branch 'ihrpr/streamablehttp-server' into ihrpr/streamablehttp-… ihrpr Apr 22, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/1902abb0901e7a1cf3799964ee16d799e21fe207
da1df74 Merge branch 'ihrpr/streamablehttp-stateless' into ihrpr/get-sse ihrpr Apr 22, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/da1df749ae2b6a0fede5b362378f1966c9bb3613
c2be5af streamable http client ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/c2be5afdb306a78d78c1d5f538e26a5a9e09c305
9b096dc add comments to server example where we use related_request_id ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/9b096dc558f02d4a903e9215037d302e9554d62a
bbe79c2 Merge branch 'main' into ihrpr/streamablehttp-server ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/bbe79c20da3098b3d761293ca02bc9b1815628dc
a0a9c5b small fixes ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/a0a9c5b4e5f7c6b39118405a3230b9e2bc66175e
a5ac2e0 use mta field for related_request_id ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/a5ac2e09df6df2eda17ea73559004a789a3d1f3c
2e615f3 unrelated test and format ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/2e615f36b7e515ad9efaf2cff46bfc1a2fa00f46
110526d clean up ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/110526d546b38bd7a4dc1479ea5e46a13edea629
7ffd5ba terminate session ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/7ffd5bab401852294aa0306c4e50d4f7a0d7ef89
029ec56 format ihrpr Apr 23, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/029ec56fec5d342e874afb42522fd17a328c7831
cae32e2 Merge branch 'ihrpr/streamablehttp-server' into ihrpr/streamablehttp-… ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/cae32e2288e35ee533aa6ad21220cb6f590bef6a
58745c7 remove useless sleep ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/58745c7d977c708e4241b1c60df03d3c2204698b
1387929 rename require_initialization to standalone_mode ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/138792978c7249e93a43157a9598a72dd04ed3c4
bccff75 Merge branch 'ihrpr/streamablehttp-stateless' into ihrpr/get-sse ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/bccff75f997338a7aa50c1b7e1a0372830a9e894
dd007d7 Merge branch 'ihrpr/get-sse' into ihrpr/client ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/dd007d7f01e6fc9a3c4ee2a33ca92a976cd3a54b
6482120 remove redundant check for initialize and session ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/6482120530b9ed70a48cf3c433822a74fd448020
9a6da2e ruff check ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/9a6da2ed1d8ce419fe3fdc9d1fa9b739bf1fa272
b957fad Merge branch 'ihrpr/get-sse' into ihrpr/client ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/b957fada1ce1c535d14622a104f1115e00c86fd9
3f5fd7e support for resumability - server ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/3f5fd7ea6bedcf73f4b038ddbfabcbd6e9abbd86
b193242 format ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/b1932422b4bcd6c54f80bdb88c322a6525356955
6110435 remove print ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/611043558716caf1b99b28d5a6a5adbd23d92f25
e087283 rename files to follow python naming ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/e0872835cf08c894a20938144682aa1237832ded
08247c4 update to use time delta in client ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/08247c420d12a4cc1723fd64cd1adf7051f7d233
0484dfb refactor ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/0484dfbfbd8f8fe1784b4db9d30776f356d81fe2
88ff2ba Merge branch 'ihrpr/client' into ihrpr/resumability-server ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/88ff2ba46fb3d01d7cf8f57e444c4d1036657b5d
5757f6c small fixes ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/5757f6cbcfc9798ef805e2992e4d252f16ea0910
ee28ad8 improve event store example implementation ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/ee28ad83fdf15e547c07ec2f5b75fcd98f995cd9
5dbddeb refactor _create_event_data ihrpr Apr 25, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/5dbddeb16c4935deec61e8e955ada5f5a3a5f6e6
8650c77 add session message ihrpr Apr 27, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/8650c77269e09adb04a894df378430db8bb924b0
ff70bd6 Merge branch 'main' into ihrpr/streamablehttp-server ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/ff70bd6746ff25b9d635bb35acfd086052536ef1
179fbc8 Merge branch 'ihrpr/streamablehttp-server' into ihrpr/streamablehttp-… ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/179fbc8e951b4f9de2d30204493ceb4b93f6b98f
a979864 Merge branch 'ihrpr/streamablehttp-stateless' into ihrpr/get-sse ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/a979864d36d96c61de5d2fc7104f1121952ddbce
11b7dd9 Merge branch 'ihrpr/get-sse' into ihrpr/client ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/11b7dd98f6192cba76418f0af6461488967d3eeb
67a899c Merge branch 'ihrpr/client' into ihrpr/resumability-server ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/67a899c9e85bb6863c94c35649380ae9467b01e0
c3e0ff3 Merge branch 'ihrpr/resumability-server' into ihrpr/memory-stream-ite… ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/c3e0ff38590347cf39fa7f944ca76ae22bd4c6e8
e06e3a5 fixes after merge ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/e06e3a596c45a389707951dcf73798b311b260df
3728976 Merge branch 'main' into ihrpr/memory-stream-item-type ihrpr May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/590/commits/37289763d277a2e0a2ab46976eaae7ca4e88feeb
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