Vitte Grammar (Core Freeze 0.1)

This file freezes the parser-level core subset accepted by the seed compiler.

• space <name> required once per module.
• top-level declarations: proc, const, form, pick, export *.
• entry function shape: proc main(args: list[string]) -> int.
• blocks use { ... } and must be non-empty when mandatory.
• imports use use/from/import module paths.

Any syntax outside this subset is experimental and not guaranteed stable.