refactor: replace lowlevel Server decorators with on_* constructor kwargs#1985

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maxisbey merged 26 commits intomainfrom

sketch/lowlevel-server-v2-kwargs

Feb 12, 2026

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refactor: replace lowlevel Server decorators with on_* constructor kwargs
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fix: remove unnecessary request_ctx contextvar from notification handlers
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fix: address PR review comments on migration docs and type hints
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fix: collapse single-arg Server() to one line in migration example
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refactor: replace _create_handler_kwargs with private methods on MCPServer
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refactor: use dict instead of list of tuples for handler maps
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docs: document keyword-only Server constructor params in migration guide
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refactor: inline _register_default_task_handlers into enable_tasks
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feat: add on_* handler kwargs to enable_tasks for custom task handlers
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refactor: drop explicit Any from ServerRequestContext, rely on RequestT default
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refactor: make ExperimentalHandlers generic on LifespanResultT
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refactor: type MCPServer handler signatures instead of Any
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refactor: type notify as ClientNotification, remove getattr
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fix: resolve pyright errors in ExperimentalHandlers.enable_tasks
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fix: advertise subscribe capability when handler is registered
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refactor: make on_ping non-optional with default handler per MCP spec
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fix: update tests to use new Server constructor kwargs pattern
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fix: migrate experimental task server tests to new handler pattern
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fix: migrate tests to new Server constructor kwargs pattern
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fix: skip partial task capability tests
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fix: migrate examples and snippets to new Server constructor kwargs pattern
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fix: update README.v2.md prose to match new low-level Server API
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fix: improve test coverage across lowlevel server and experimental tasks
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fix: cover experimental property cache-hit branch and fix completion test
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Commits on Feb 12, 2026

fix: address PR review comments (typo and field name in docs)
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fix: improve migration guide accuracy and document additional breaking changes
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refactor: replace lowlevel Server decorators with on_* constructor kwargs#1985

refactor: replace lowlevel Server decorators with on_* constructor kwargs#1985
maxisbey merged 26 commits intomainmodelcontextprotocol/python-sdk:mainfrom
sketch/lowlevel-server-v2-kwargsmodelcontextprotocol/python-sdk:sketch/lowlevel-server-v2-kwargsCopy head branch name to clipboard

Commits on Feb 11, 2026

refactor: replace lowlevel Server decorators with on_* constructor kwargs

fix: remove unnecessary request_ctx contextvar from notification handlers

fix: address PR review comments on migration docs and type hints

fix: collapse single-arg Server() to one line in migration example

refactor: replace _create_handler_kwargs with private methods on MCPServer

refactor: use dict instead of list of tuples for handler maps

docs: document keyword-only Server constructor params in migration guide

refactor: inline _register_default_task_handlers into enable_tasks

feat: add on_* handler kwargs to enable_tasks for custom task handlers

refactor: drop explicit Any from ServerRequestContext, rely on RequestT default

refactor: make ExperimentalHandlers generic on LifespanResultT

refactor: type MCPServer handler signatures instead of Any

refactor: type notify as ClientNotification, remove getattr

fix: resolve pyright errors in ExperimentalHandlers.enable_tasks

fix: advertise subscribe capability when handler is registered

refactor: make on_ping non-optional with default handler per MCP spec

fix: update tests to use new Server constructor kwargs pattern

fix: migrate experimental task server tests to new handler pattern

fix: migrate tests to new Server constructor kwargs pattern

fix: skip partial task capability tests

fix: migrate examples and snippets to new Server constructor kwargs pattern

fix: update README.v2.md prose to match new low-level Server API

fix: improve test coverage across lowlevel server and experimental tasks

fix: cover experimental property cache-hit branch and fix completion test

Commits on Feb 12, 2026

fix: address PR review comments (typo and field name in docs)

fix: improve migration guide accuracy and document additional breaking changes

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