This test exercises the "go_references" MCP tool.

-- flags --
-mcp
-ignore_extra_diags

-- go.mod --
module example.com

-- settings.json --
{
    "mcpTools": {
        "go_references": true
    }
}

-- a/a.go --
package a

func Foo() {} //@loc(Foo, "Foo")

func callFoo() {
    Foo()
}

-- b/b.go --
package b

import "example.com/a"

func callFoo() {
    a.Foo()
}

//@mcptool("go_references", `{}`, location=Foo, output=threeref)

-- @threeref --
The object has 3 references. Their locations are listed below
Reference 1
Located in the file: $WORKDIR/a/a.go
The reference is located on line 3, which has content `func Foo() {} //@loc(Foo, "Foo")`

Reference 2
Located in the file: $WORKDIR/a/a.go
The reference is located on line 6, which has content `Foo()`

Reference 3
Located in the file: $WORKDIR/b/b.go
The reference is located on line 6, which has content `a.Foo()`

