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Bump mcp from 0.14.0 to 0.15.0#23279

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NobodysNightmare merged 2 commits into
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dependabot/bundler/dev/mcp-0.15.0
May 21, 2026
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Bump mcp from 0.14.0 to 0.15.0#23279
NobodysNightmare merged 2 commits into
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dependabot/bundler/dev/mcp-0.15.0

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@dependabot dependabot Bot commented on behalf of github May 19, 2026

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Bumps mcp from 0.14.0 to 0.15.0.

Release notes

Sourced from mcp's releases.

v0.15.0

Added

  • Support notifications/cancelled per MCP specification (#332)
  • Add client-level connect for initialize handshake (#327)
  • Add client-level connect handshake to stdio transport (#336)

Changed

  • Return tool argument validation failures as tool execution errors (#333)

Removed

  • Remove obsolete MCP::Transports module (#331)
Changelog

Sourced from mcp's changelog.

[0.15.0] - 2026-05-05

Added

  • Support notifications/cancelled per MCP specification (#332)
  • Add client-level connect for initialize handshake (#327)
  • Add client-level connect handshake to stdio transport (#336)

Changed

  • Return tool argument validation failures as tool execution errors (#333)

Removed

  • Remove obsolete MCP::Transports module (#331)
Commits
  • ebc6569 Merge pull request #337 from koic/release_0_15_0
  • 32b6c9b Release 0.15.0
  • be8a5df Merge pull request #336 from koic/add_connect_to_stdio_client
  • 46b738e Add client-level connect handshake to stdio transport
  • 3d94377 Merge pull request #332 from koic/feature_cancellation
  • a97e391 Support notifications/cancelled per MCP specification
  • 541200f Merge pull request #335 from atesgoral/ag/use-sdk-streamable-http-client-example
  • 933cf94 Update Streamable HTTP client example to use SDK client
  • 0c46dcd Merge pull request #327 from atesgoral/ag/client-connect-handshake
  • ddfbfad Add client-level connect for initialize handshake
  • Additional commits viewable in compare view

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Bumps [mcp](https://github.com/modelcontextprotocol/ruby-sdk) from 0.14.0 to 0.15.0.
- [Release notes](https://github.com/modelcontextprotocol/ruby-sdk/releases)
- [Changelog](https://github.com/modelcontextprotocol/ruby-sdk/blob/main/CHANGELOG.md)
- [Commits](modelcontextprotocol/ruby-sdk@v0.14.0...v0.15.0)

---
updated-dependencies:
- dependency-name: mcp
  dependency-version: 0.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file ruby Pull requests that update Ruby code labels May 19, 2026
@ulferts

ulferts commented May 21, 2026

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@NobodysNightmare , I guess this is your field of expertise, right?

@NobodysNightmare

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It's fascinating... I think with every other release of the gem I have to flip flop the test expectation one way or another. This was introduced in redirect.github.com/modelcontextprotocol/ruby-sdk/issues/333.

Let me check if there's a commit that I can revert for the tests to pass or whether this time around we are talking about a new test case that failed.

(in their defense: We are talking about a vaguely worded piece of the MCP spec here... so I guess this was to be expected)

This reverts commit 5fabc7d.

Blindly testing whether this fixes the test failures after the last
MCP update.
@NobodysNightmare NobodysNightmare merged commit c6b88a2 into dev May 21, 2026
15 of 16 checks passed
@NobodysNightmare NobodysNightmare deleted the dependabot/bundler/dev/mcp-0.15.0 branch May 21, 2026 12:27
@github-actions github-actions Bot locked and limited conversation to collaborators May 21, 2026
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