nx_depcycle.nx

nx_depcycle.nx -- ACYCLIC DEPENDENCIES PRINCIPLE checker (industry SOTA, grounded in nishi research: corpus confirms Coupling / Cohesion / Dependency-inversion / Clean-architecture as the canon). Reads the ecosystem IMPORT GRAPH (the atlas edges) and finds circular dependencies: A imports B imports ... imports A. Cycles are the top structural smell -- organs in a cycle can't be built / understood / tested / reused independently, blocking modular OO design (Robert Martin, "Clean Architecture", ADP). Uses KAHN topological reduction (iterative, no recursion): repeatedly remove zero-in-degree nodes; whatever remains with in-degree>0 is trapped in a cycle = the ADP-violation set. Deterministic. argv: <dir> [dir2...] Report: CYCLENODE <basename> (each node still trapped after reduction), then NX-DEPCYCLE nodes=N edges=E cyclic=C verdict=ACYCLIC|CYCLIC-C exit 0 = ran. license_tier: ORIGINAL No hw writes (Rule 26).