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modelcontextprotocol
python-sdk
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Add a client extension API
- #3034
#3034
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maxisbey
merged 15 commits into
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modelcontextprotocol/python-sdk:main
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client-extensions
modelcontextprotocol/python-sdk:client-extensions
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Jun 30, 2026
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Add a client extension API
#3034
maxisbey
merged 15 commits into
main
modelcontextprotocol/python-sdk:main
from
client-extensions
modelcontextprotocol/python-sdk:client-extensions
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Commits
Commits on Jun 30, 2026
Add client extension declaration vocabulary
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Support vendor request types in ClientSession.send_request
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Snapshot extension validation messages instead of matching substrings
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Pin preconnect and absent-params arms of the Mcp-Name delta
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Fold result claims and notification bindings into ClientSession
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Harden claim and binding construction invariants
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Fold ClientExtension instances into Client
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Refine extension fold errors and pin read-once for all declarations
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Document client extensions and prove the loop in the interaction suite
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Claimed shapes carry vendor fields verbatim; say so honestly
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Move the identifier grammar matrix to the shared test home
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Fix core-arm sentinel collision and close binding queues on every exit
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Tighten comments and docstrings across the extension surface
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Address review feedback on claim construction and notification ordering
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Check every alias form when reserving core surface wire keys
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