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Michael Suchacz
e92fd8e96f
## Stack Context PR 6 of 6 in a stack that migrates every Coder MCP surface from the archived `github.com/mark3labs/mcp-go` library to the official `github.com/modelcontextprotocol/go-sdk` v1.7.0. Stack: #28056 -> #28057 -> #28058 -> #28059 -> #28060 -> #28061 ## Why With every production surface migrated, this PR removes the mark3labs dependency entirely and converts the remaining test fixtures. - Migrates the remaining mark3labs test fixtures (coderd MCP e2e tests, chatd fixtures, mcpclient fixtures, and the Force On MCP policy tests) to official stateless SDK servers. - Removes `github.com/mark3labs/mcp-go` from `go.mod` and drops the corresponding dependabot ignore entry. Zero references remain repo-wide. - Updates the MCP docs for the 2026-07-28 protocol: stateless Streamable HTTP behavior, the supported 2024-11-05 through 2026-07-28 protocol range, and explicit non-features (resources, prompts, structured output, elicitation, MCP Tasks). - The e2e ping assertion is removed because MCP 2026-07-28 removed the ping method. > Mux created this PR on Mike's behalf.