Navigability groundwork from the architecture review — zero behaviour change.
- docs/MODULES.md: the repo map. Area -> directory -> key files -> re-mint?, plus
per-feature touch points (tree-shaking, direct-linking, numeric fl/fx, inlining,
multimethods, deps) and where a given clojure.core fn lives. Answers "where does
X live / what's related to Y" in one read.
- docs/rfc/README.md: index the 7 RFCs; flags RFC 0007's stale "no code yet" status
(direct-linking + tree-shaking shipped) and the undocumented inlining/numeric work.
- CLAUDE.md: document the var-deref calling convention (public defns reached from the
.ss runtime by string lookup aren't dead), the def-var! native pattern, and the
overlay shadowing rule; point at MODULES.md.
- REFACTOR_PLAN.md: the prioritized, risk-tiered plan (working doc for this branch).
