Module communication
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Communication analysis per spec §1.1 — Conway’s law shared-work author pairs.
For each pair of authors who co-edit the same files, compute:
- shared: distinct paths they both edited
- average: mean of their individual total commits
- strength: 100 × shared / average (percentage)
Self-pairs are excluded.
Research basis: see docs/research-foundations.md entry
“communication” (Conway, Datamation 1968 — original Conway’s-law
essay; Bird et al., Comm. ACM 2009 — empirical follow-up on
Windows Vista development showing organisational structure shapes
defect density).