Fil-C Ruby Gem Porting

Context

Fil-C is a memory-safe C compiler. Ruby's VALUE type becomes a pointer (struct rb_value_unit_struct *) instead of an integer. This breaks code that:

• Passes int literals where VALUE expected (Qfalse, Qtrue, ERROR_TOKEN)
• Stores VALUE in int variables
• Does bitwise ops on VALUE
• Mixes VALUE and ID types
• Uses switch on VALUE (case labels must be integer constants)

Workflow

Each command runs independently (no persistent shell). Use ruby_3_3 not ruby.