topos.functors.profunctors.mdg.compare

MDG Comparison — profunctor D : E × E^op → ℝ restricted to the inter-module dependency graph. ====================================================================

Pairwise comparison of two ModuleDependencyGraph instances. MDG comparison answers questions of the form “did this refactor move the file’s architectural position in the codebase?” — coupling, Martin instability, fan-in/out, and reachable-import depth.

Signals (all target − source so a positive delta means more):

coupling_delta : signed change in Ca + Ce instability_delta : signed change in Martin instability Ce/(Ca+Ce) fan_in_delta : signed change in incoming CALLS edges fan_out_delta : signed change in outgoing CALLS edges dep_depth_delta : signed change in longest IMPORTS chain

class topos.functors.profunctors.mdg.compare.MDGComparison(coupling_delta, instability_delta, fan_in_delta, fan_out_delta, dep_depth_delta, source_metrics, target_metrics)

Bases: object

Pairwise comparison summary for two module-dependency graphs.

coupling_delta

instability_delta

fan_in_delta

fan_out_delta

dep_depth_delta

source_metrics

target_metrics

property changed

topos.functors.profunctors.mdg.compare.coupling_delta(source, target)

Signed change in total coupling Ca + Ce (target − source).

topos.functors.profunctors.mdg.compare.instability_delta(source, target)

Signed change in Martin instability Ce / (Ca + Ce).

topos.functors.profunctors.mdg.compare.fan_in_delta(source, target)

Signed change in incoming CALLS edges.

topos.functors.profunctors.mdg.compare.fan_out_delta(source, target)

Signed change in outgoing CALLS edges.

topos.functors.profunctors.mdg.compare.dep_depth_delta(source, target)

Signed change in longest IMPORTS chain length.

topos.functors.profunctors.mdg.compare.compare_mdg(source, target)

Run the full MDG comparison suite for a single pair of graphs.