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Issue: cool.io gem’s IO::Buffer shadows Ruby 3.1+ built-in class

Issue: cool.io gem’s IO::Buffer shadows Ruby 3.1+ built-in class: a task in LegoFlow-SWE (Harbor dataset). When the cool.io gem is loaded on Ruby 3.1 or later, its own IO::Buffer class replaces the standard library’s IO::Buffer (introduced in Ruby 3.1). This conflicts with code that expects the…

The task

When the `cool.io` gem is loaded on Ruby 3.1 or later, its own `IO::Buffer` class replaces the standard library’s `IO::Buffer` (introduced in Ruby 3.1). This conflicts with code that expects the built‑in class, causing unexpected failures.

Part of Lego-X/LegoFlow-SWE.