Vyasa KG — ACL (viewer-mask) Engine + UI Handoff Prompt
role_dev (Satya) sees only cls_eng nodes; no decisions/questions.
role_ext (Rajeev) sees only the 22 cls_external nodes; provenance traversal from an external
node never reaches an internal/eng fact.
role_cxo sees everything (3184 facts).
d_brd is visible to cxo, lead (via eng+internal), biz (internal+external), dev (eng), ext (external).