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Support latest MCP protocol version - #54494

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mcp-spec-update
Apr 29, 2026
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Support latest MCP protocol version#54494
bennetbo merged 3 commits into
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mcp-spec-update

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@bennetbo

@bennetbo bennetbo commented Apr 22, 2026

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Updates our MCP implementation to support 2025-06-18 and 2025-11-25

Self-Review Checklist:

  • I've reviewed my own diff for quality, security, and reliability
  • Unsafe blocks (if any) have justifying comments
  • The content is consistent with the UI/UX checklist
  • Tests cover the new/changed behavior
  • Performance impact has been considered and is acceptable

Closes #54458, #53456

Release Notes:

  • Support latest MCP version (2025-11-25)

@cla-bot cla-bot Bot added the cla-signed The user has signed the Contributor License Agreement label Apr 22, 2026
@bennetbo bennetbo changed the title Support latest MCP protocol versions Support latest MCP protocol version Apr 22, 2026
@zed-community-bot zed-community-bot Bot added the staff Pull requests authored by a current member of Zed staff label Apr 22, 2026

@tomhoule tomhoule left a comment

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Tries this with a bunch of MCP servers. Nothing broken it seems.

@bennetbo
bennetbo marked this pull request as ready for review April 29, 2026 16:06
@bennetbo
bennetbo enabled auto-merge April 29, 2026 16:07
@bennetbo
bennetbo added this pull request to the merge queue Apr 29, 2026
Merged via the queue into main with commit 24f6248 Apr 29, 2026
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@bennetbo
bennetbo deleted the mcp-spec-update branch April 29, 2026 16:32
ebaah46 pushed a commit to ebaah46/zed that referenced this pull request May 6, 2026
Updates our MCP implementation to support `2025-06-18` and `2025-11-25`

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes zed-industries#54458, zed-industries#53456

Release Notes:

- Support latest MCP version (`2025-11-25`)
@zhchtao323

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[MCP] >> initialize({"protocolVersion": "2025-03-26", "capabilities": {}, "clientInfo": {"name": "Zed", "version": "0.1.0"}})
[MCP] << initialize (0.0ms) {"protocolVersion": "2025-06-18", "capabilities": {"tools": {}, "resources": {"subscribe": false, "listChanged": false}, "prompts": {}}, "serverInfo": {"name": "ida-pro-mcp", "version": "1.0.0"}}

jonx pushed a commit to jonx/zed-aros that referenced this pull request Jul 17, 2026
Updates our MCP implementation to support `2025-06-18` and `2025-11-25`

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes zed-industries#54458, zed-industries#53456

Release Notes:

- Support latest MCP version (`2025-11-25`)
jolutz pushed a commit to jolutz/zed that referenced this pull request Aug 8, 2026
Updates our MCP implementation to support `2025-06-18` and `2025-11-25`

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes zed-industries#54458, zed-industries#53456

Release Notes:

- Support latest MCP version (`2025-11-25`)
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Splunk MCP server fails to start with Unsupported protocol version: ProtocolVersion("2025-06-18")

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