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feat: add instructions field to InitializeResult #150

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merged 2 commits into from
Jan 13, 2025
Merged

feat: add instructions field to InitializeResult #150

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1351914
Add instructions field to InitializeResult
salman1993 Jan 13, 2025
bc6746e
Add instructions field to ServerSession and FastMCP
salman1993 Jan 13, 2025
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2 changes: 2 additions & 0 deletions src/mcp/types.py
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Original file line number Diff line number Diff line change
Expand Up @@ -285,6 +285,8 @@ class InitializeResult(Result):
"""The version of the Model Context Protocol that the server wants to use."""
capabilities: ServerCapabilities
serverInfo: Implementation
instructions: str | None = None
"""Instructions describing how to use the server and its features."""


class InitializedNotification(Notification):
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2 changes: 2 additions & 0 deletions tests/client/test_session.py
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Expand Up @@ -51,6 +51,7 @@ async def mock_server():
prompts=None,
),
serverInfo=Implementation(name="mock-server", version="0.1.0"),
instructions="The server instructions."
)
)

Expand Down Expand Up @@ -92,6 +93,7 @@ async def listen_session():
assert result.protocolVersion == LATEST_PROTOCOL_VERSION
assert isinstance(result.capabilities, ServerCapabilities)
assert result.serverInfo == Implementation(name="mock-server", version="0.1.0")
assert result.instructions == "The server instructions."

# Check that the client sent the initialized notification
assert initialized_notification
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