nx_capability_ladder.nx

nx_capability_ladder.nx -- THE BUILD-UP MAP, hardware rung up (operator 2026-06-13: "we need mapping on how we build from the hardware rung up ... so we never have floating capabilities but each layer below acts as the foundation for the one above"). Organ-AUTHORED (not hand-drawn): composes nx_assign_core to read the REAL queue and COMPUTE, from the deps graph + DONE status, a layered map: layer(row) = 0 if deps "-" ; else 1 + max(layer(dep)) (topological depth, fixpoint) layer 0 = the foundations with no dependency = the hardware/toolchain rung. FLOATING = a DONE capability whose foundation (a dep) is NOT DONE / is unknown -- a capability standing on nothing. The no-floating LAW: zero floating. Emits the map to knowledge/registry/capability_ladder.tsv (layer-ascending = bottom-up) and a CAPLADDER evidence line. Navigation: the lowest ABSENT foundation is what to build next; never build a row whose foundation is ABSENT (that would float). SELF-VALIDATING (no false-green): a baked pos control (DONE row on a DONE foundation -> NOT floating) and neg control (DONE row on a TODO foundation -> floating) run on a synthetic in-memory context BEFORE the real queue; controls wrong -> RED. Reuses an_deps_done as the grounding primitive (DRY). license_tier: ORIGINAL