AGENTS/functions/CLAUDE.md is git-ignored local agent state, not part
of the repo -- a comment/commit referencing it as the schema's home
points contributors at a file they can't see. The canonical CLASSIFICATION
schema now lives at docs/function-classification-schema.md (tracked),
with CONTRIBUTING.md's existing function-header-conventions section
extended to introduce it, and the C1 shadow doc's pointer updated to
match. AGENTS/functions/CLAUDE.md keeps only a one-line pointer to the
tracked file instead of duplicating the definitions.