# Lesson 1 complete: monorepo vs polyrepo vs collocation

Learner finished lesson 0001 with all quiz answers correct. Can place monorepo on the spectrum (not monolith; collocation ≠ tooling), name multi-project maintenance wins (atomic changes, shared standards, less drift) and costs (tooling, coupling, ownership), and choose polyrepo when hard isolation dominates. Unlocks architecture map next (workspace / project graph / tasks / targets) before moon install hands-on.