docs: reconcile RFC coordination index with shipped reality

.changeset/reconcile-rfc-coordination-docs.md

@@ -0,0 +1,18 @@
+---
+"@adobe/design-data-spec": patch
+---
+
+Reconcile RFC coordination docs with shipped reality: Phase B, CTR, and guidelines
+were undocumented or stale.
+
+- **packages/design-data-spec/spec/authoring-workflow.md**: flip Phase B (foundation-corpus
+  write path, token lifecycle ops, mode-set management) from "not yet shipped" to shipped;
+  clarify `write_component` remains unscheduled.
+- **packages/design-data-spec/spec/agent-surface.md**: promote `write_token` from RECOMMENDED
+  to NORMATIVE (MUST), matching the Phase B promotion now reflected in authoring-workflow.md.
+- **docs/rfc-coordination.md**: add RFC-E (Component/Token Relationships) and RFC-F
+  (Guidelines/Phase 10) rows, a #1324 draft-RFC row, reference 6 previously-orphaned
+  spec files, and refresh #806/#623/#625/#832 with rules and PRs shipped since the
+  last update.
+- **docs/token-studio-sunset.md**: mark Phase 1 (foundation-corpus write target) done,
+  unblocking Phase 2.