Sourced from mcp's releases.

v1.28.0

Deprecations

Two API surfaces now emit DeprecationWarning ahead of their removal in v2. Nothing is removed in 1.x, and the warnings fire only when the deprecated API is called - importing the modules stays silent.

• WebSocket transport - mcp.client.websocket.websocket_client and mcp.server.websocket.websocket_servermodelcontextprotocol/typescript-sdk#1783
• Experimental tasks API - ClientSession.experimental, Server.experimental, ServerSession.experimental, and the experimental_task_handlers= kwarg on ClientSession. Tasks (SEP-1686) were removed from the MCP specification and are expected to return as a separate MCP extension.

If your test suite runs with filterwarnings = ["error"] and exercises these paths, add a scoped ignore such as ignore:The experimental tasks API is deprecated:DeprecationWarning or ignore:The WebSocket .* transport is deprecated:DeprecationWarning.

See #2828 for full details.

What's Changed

• [v1.x] Support Python 3.14 by @​maxisbey in modelcontextprotocol/python-sdk#2769
• fix: omit null optional fields from task result payloads by @​liuzemei in modelcontextprotocol/python-sdk#2809
• [v1.x] Deprecate the WebSocket transport and the experimental tasks entry points by @​maxisbey in modelcontextprotocol/python-sdk#2828
• [v1.x] Add a v2 status banner to the README by @​maxisbey in modelcontextprotocol/python-sdk#2835
• [v1.x] Deflake the child process cleanup tests by @​maxisbey in modelcontextprotocol/python-sdk#2839

New Contributors

• @​liuzemei made their first contribution in modelcontextprotocol/python-sdk#2809

Full Changelog: modelcontextprotocol/python-sdk@v1.27.2...v1.28.0

v1.27.2

What's Changed

• [v1.x] ci: deploy docs to py.sdk.modelcontextprotocol.io via Pages artifact by @​maxisbey in modelcontextprotocol/python-sdk#2635
• [v1.x] Add subject and claims to AccessToken by @​maxisbey in modelcontextprotocol/python-sdk#2690
• [v1.x] Bind transport sessions to the authenticated principal by @​maxisbey in modelcontextprotocol/python-sdk#2719
• [v1.x] Scope experimental tasks to the session that created them by @​maxisbey in modelcontextprotocol/python-sdk#2720

Full Changelog: modelcontextprotocol/python-sdk@v1.27.1...v1.27.2

• 777b8d0 [v1.x] Support TransportSecuritySettings in the WebSocket server transport (#...
• 4720467 [v1.x] Set Development Status classifier to Production/Stable (#2976)
• 6df3d73 [v1.x] Buffer per-request StreamableHTTP streams; store priming event before ...
• 32d3290 [v1.x] Pass a list to parametrize in test_docs_examples (pytest 9.1.0 compat)...
• 0dca751 [v1.x] Deflake the child process cleanup tests (#2839)
• 52258a9 [v1.x] Add a v2 status banner to the README (#2835)
• b8f4917 [v1.x] Deprecate the WebSocket transport and the experimental tasks entry poi...
• 2309e5e fix: omit null optional fields from task result payloads (#2809)
• 494eb11 [v1.x] Support Python 3.14 (#2769)
• 6213787 [v1.x] Scope experimental tasks to the session that created them (#2720)
• Additional commits viewable in compare view

• ba631ae Merge "test: Use context manager-style assertRaises"
• 7ad9087 Drop Python 3.10 support
• 704b790 zuul: Use openstack-python3-next-jobs template
• 14af264 pre-commit: Bump versions
• 094e317 typing: Updates for latest cmd2
• 4b0ecb9 Drop support for Python 3.10
• a386a37 test: Use context manager-style assertRaises
• See full diff in compare view

Sourced from ruff's releases.

0.16.0

Release Notes

Released on 2026-07-23.

Check out the blog post for a migration guide and overview of the changes!

Breaking changes

• Ruff now enables a much larger set of rules by default (413, up from 59). See the blog post for more details and the new Default Rules page for a full listing of the enabled rules.

• Ruff can now format Python code blocks in Markdown files and will do this by default. See the documentation for more details.

• Ruff now supports ruff: ignore comments at the ends of lines, like noqa comments, or on the line preceding a diagnostic. For example, these both suppress an unused-import (F401) diagnostic:

  import math  # ruff: ignore[F401]
  ruff: ignore[F401]
  import os

• Fixes are now shown in check and format --check output:

  ❯ ruff format --check .
  unformatted: File would be reformatted
   --> try.md:1:1
    |
  1 | ```python
    - import   math
  2 + import math
  3 | ```
    |
  1 file would be reformatted

  This example also shows off the Markdown formatting.

• format --check now supports the same output formats as the linter, including the github and gitlab outputs for rendering annotations in CI:

  ❯ ruff format --check --output-format github .
  ::error title=ruff (unformatted),file=try.md,line=2,col=8,endLine=2,endColumn=10::try.md:2:8: unformatted: File would be reformatted

  See the CLI help or documentation for the full list of supported formats.

• The filename, location, end_location, fix.edits[].location, and fix.edits[].end_location fields in the JSON output format may now be null rather than defaulting to the empty string and row 1, column 1, respectively.

... (truncated)

Sourced from ruff's changelog.

0.16.0

Released on 2026-07-23.

Check out the blog post for a migration guide and overview of the changes!

Breaking changes

• Ruff now enables a much larger set of rules by default (413, up from 59). See the blog post for more details and the new Default Rules page for a full listing of the enabled rules.

• Ruff can now format Python code blocks in Markdown files and will do this by default. See the documentation for more details.

• Ruff now supports ruff: ignore comments at the ends of lines, like noqa comments, or on the line preceding a diagnostic. For example, these both suppress an unused-import (F401) diagnostic:

  import math  # ruff: ignore[F401]
  ruff: ignore[F401]
  import os

• Fixes are now shown in check and format --check output:

  ❯ ruff format --check .
  unformatted: File would be reformatted
   --> try.md:1:1
    |
  1 | ```python
    - import   math
  2 + import math
  3 | ```
    |
  1 file would be reformatted

  This example also shows off the Markdown formatting.

• format --check now supports the same output formats as the linter, including the github and gitlab outputs for rendering annotations in CI:

  ❯ ruff format --check --output-format github .
  ::error title=ruff (unformatted),file=try.md,line=2,col=8,endLine=2,endColumn=10::try.md:2:8: unformatted: File would be reformatted

... (truncated)

• a2635fd Bump 0.16.0 (#27136)
• 3433449 [ty] Reuse full call diagnostics for implicit setter calls (#27115)
• 2240070 Reflect ruff: ignore and --add-ignore stabilization in documentation (#27...
• 17ef711 Stabilize --add-ignore (#27125)
• ef912bb Add newly stabilized rules to defaults (#27055)
• b30f040 Stabilize new default rules (#27035)
• bcd70c5 Exclude Markdown files from format-dev runs (#27052)
• 87e51e2 Fix format --check spans for syntax errors (#27045)
• afe2723 [flake8-gettext] Stabilize qualified-name and built-in binding resolution (...
• a9702d8 [flake8-bandit] Stabilize string literal binding resolution (S310) (#26944)
• Additional commits viewable in compare view

• See full diff in compare view

• 8b34b1b added properties column to share replica list command
• 97edb9b Merge "Graduate share migration feature"
• e1f84b7 Graduate share migration feature
• See full diff in compare view

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