Migrate repos toolset to modelcontextprotocol/go-sdk

[Copilot]

Migrates the repos toolset (18 tools) from mark3labs/mcp-go to modelcontextprotocol/go-sdk as part of the broader SDK migration tracked in #1428.

Changes

Tool Definitions

• Converted from mcp.NewTool() DSL to mcp.Tool{} structs with jsonschema.Schema
• Changed tool handler signatures from (mcp.Tool, server.ToolHandlerFunc) to (mcp.Tool, mcp.ToolHandlerFor[map[string]any, any])
• Updated handler functions to accept (ctx, *request, args) and return (result, data, error)

Before:

func GetCommit(...) (mcp.Tool, server.ToolHandlerFunc) {
    return mcp.NewTool("get_commit",
        mcp.WithString("owner", mcp.Required(), ...),
        ...
    ),
    func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
        owner, _ := RequiredParam[string](request, "owner")
        ...
        return mcp.NewToolResultText(data), nil
    }
}

After:

func GetCommit(...) (mcp.Tool, mcp.ToolHandlerFor[map[string]any, any]) {
    tool := mcp.Tool{
        Name: "get_commit",
        InputSchema: &jsonschema.Schema{
            Properties: map[string]*jsonschema.Schema{
                "owner": {Type: "string", ...},
            },
            Required: []string{"owner", ...},
        },
    }
    handler := mcp.ToolHandlerFor[map[string]any, any](
        func(ctx context.Context, _ *mcp.CallToolRequest, args map[string]any) (*mcp.CallToolResult, any, error) {
            owner, _ := RequiredParam[string](args, "owner")
            ...
            return utils.NewToolResultText(data), nil, nil
        })
    return tool, handler
}

Parameter Extraction

• Changed from RequiredParam[T](request, "key") to RequiredParam[T](args, "key")
• Updated optional parameter helpers to extract from args map[string]any

Result Types

• Replaced mcp.NewToolResultText/Error/Resource with utils.NewToolResultText/Error/Resource
• Unified mcp.TextResourceContents and mcp.BlobResourceContents into mcp.ResourceContents
• Changed Blob field from base64 string to []byte

Test Updates

• Updated all handler invocations to new 3-parameter, 3-return signature
• Added schema casting: schema := tool.InputSchema.(*jsonschema.Schema)
• Fixed resource content assertions for unified type

Toolsnaps

Updated 16 snapshot files reflecting schema format changes (property ordering, required array format).

Tools Migrated

GetCommit, ListCommits, ListBranches, CreateOrUpdateFile, CreateRepository, GetFileContents, ForkRepository, DeleteFile, CreateBranch, PushFiles, ListTags, GetTag, ListReleases, GetLatestRelease, GetReleaseByTag, ListStarredRepositories, StarRepository, UnstarRepository

Original prompt

Migrate the repos toolset to modelcontextprotocol/go-sdk.

This will be merged into the parent PR #1428, so reference that PR in the description to track the migration

Custom agent used: go-sdk-tool-migrator
Agent specializing in migrating MCP tools from mark3labs/mcp-go to modelcontextprotocol/go-sdk

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[LuluBeatson]

Holding off on reviewing the Copilot PR because of:

• consolidating repos tools #1283

We will probably close this migration PR, merge the consolidation PR, then redo the migration of this toolset.