Add missing TasksCallCapability to enable proper MCP task support#1854
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Add missing TasksCallCapability to enable proper MCP task support#1854
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The enable_tasks() method was creating TasksToolsCapability without the required nested call capability. This caused VS Code Copilot and other MCP clients to fail their capability detection check (tasks?.requests?.tools?.call !== undefined), silently falling back to synchronous tool calls instead of using the proper asynchronous MCP Tasks protocol. This fix: - Imports TasksCallCapability from mcp.types - Passes call=TasksCallCapability() when creating TasksToolsCapability - Adds unit test to verify the nested capability is properly set Without this fix, long-running tools would timeout after 5 minutes instead of receiving proper asynchronous task handling. Github-Issue: #1853
maxisbey
added
bug
Kludex
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Jan 15, 2026
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The enable_tasks() method was creating TasksToolsCapability without
the required nested call capability. This caused VS Code Copilot and
other MCP clients to fail their capability detection check
(tasks?.requests?.tools?.call !== undefined), silently falling back
to synchronous tool calls instead of using the proper asynchronous
MCP Tasks protocol.
This fix:
Without this fix, long-running tools would timeout after 5 minutes
instead of receiving proper asynchronous task handling.
Github-Issue: #1853