Tooltitude for Go: the gopls gaps a free extension actually closes

What it adds on top of gopls

Three features worth trying today

1. Debug a single table-driven test case

func TestAdd(t *testing.T) {
    cases := []struct {
        a, b, want int
    }{
        {1, 2, 3},   // ← "Debug" appears here
        {0, 0, 0},   // ← "Debug" appears here
        {-1, 1, 0},  // ← "Debug" appears here
    }
    for _, c := range cases {
        got := Add(c.a, c.b)
        if got != c.want {
            t.Errorf("Add(%d, %d) = %d; want %d", c.a, c.b, got, c.want)
        }
    }
}

2. Postfix completions

err.if        // expands to:  if err != nil { }
items.for_range // expands to:  for i, v := range items { }
result.return   // expands to:  return result
val.var         // expands to:  v := val

3. Error handling code actions

data, err := io.ReadAll(r)
// Tooltitude quick-fix options:
// → Handle error (return err)
// → Handle error (panic)
// → Handle error (wrapped: return fmt.Errorf("...": %w, err))

Install

tooltitudeteam.tooltitude

Known issues and the Plus pricing problem

• Project sync modifies go.mod/go.sum on open (GitHub issue #74, filed April 2026): Tooltitude v1.49.0+ automatically syncs the project on open and rewrites these files, which prevents branch switching while the extension is active. No setting to disable this behavior yet. 3
• Completions for unimported packages don't work (issue #65, open since January 2026): typing fmt. when fmt isn't yet imported yields no suggestions. gopls handles this correctly. 4
• Full LSP mode is experimental: the Plus-tier feature that lets Tooltitude replace gopls entirely is marked experimental and doesn't cover all gopls capabilities. 5