This commit addresses the critical rule regarding exhaustive `match`
expressions on AST node kinds. By explicitly listing all variants
instead of using wildcards (`_ =>`), we ensure that new AST node types
are consciously handled throughout the compilation pipeline. This
practice prevents subtle bugs and makes the compiler more robust against
future changes.
The `CLAUDE.md` file has been updated to reflect this critical rule.
The deleted `BUG_program_node_typeinference.md` file indicates that a
previously identified bug related to type inference with `Program` nodes
has been resolved, likely as a consequence of enforcing these exhaustive
matches.
Brummel
7d6e040721