modelcontextprotocol / modelcontextprotocol/servers

MacOS Copilot Visual Studio Code Agent Mode - sequencialthinking

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bug
Dominant language
TypeScript
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Forks
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Avg merge
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Merged PRs (30d)
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Description

Describe the bug
Every command that triggers sequencialthinking mcp is returning error.

To Reproduce
Steps to reproduce the behavior:

  1. Copilot in Agent mode do any query with #sequentialthinking eg. #sequentialthinking how to create a new react project?

Expected behavior
Think, create a plan and then print out instructions about how to create a new react project.

Logs

GitHub Copilot
2025-05-13 15:53:38.039 [warning] Tool bb7_sequentialthinking failed validation: object has unsupported schema keyword 'minimum'
2025-05-13 15:53:38.039 [warning] Tool bb7_sequentialthinking failed validation: object has unsupported schema keyword 'minimum'
2025-05-13 15:53:38.039 [warning] Tool bb7_sequentialthinking failed validation: object has unsupported schema keyword 'minimum'
2025-05-13 15:53:38.039 [warning] Tool bb7_sequentialthinking failed validation: object has unsupported schema keyword 'minimum'
2025-05-13 15:53:38.447 [info] Request ID for failed request: 93b7029a-bd34-462b-81b4-29b0ac6dac45
2025-05-13 15:53:38.448 [error] Request Failed: 400 Bad Request
2025-05-13 15:53:38.451 [error] Error: Failed to compute args for tool: "bb7_sequentialthinking" (at tsx element Ok > YM > mde > jSe > tS > Cre > rr)

Additional context
This is probably not an issue with the MCP itself since it wasn't changed in a while, but likely something changed with copilot which might require changes in the MCP?

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the sequentialthinking MCP tool and inspecting the schema used for its arguments, especially the fields that produce the unsupported minimum keyword. Reproduce the request in Visual Studio Code Copilot Agent mode with the example prompt, then verify that the tool validates and returns the expected planning instructions without a 400 error.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript, vscode
Domain
devtools
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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