Three-Tier Architecture

How the tiers interact:

All three tiers load at session start but serve different purposes: Tier 1 (global) is cross-project rules and working style; Tier 2 (project) is the codebase's tech stack, architecture, and conventions; Tier 3 (skills) is task-level process enforcement.

They don't conflict because they address different concerns. Tier 1: "always use Alembic for migrations." Tier 2: "this project's migrations enable row-level security on tenant tables." Tier 3: "verify this migration applies and rolls back cleanly before marking it done." Each adds precision without contradiction.

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