Summary & Motivation

Consolidates DagsterInstance architecture from a 3-layer structure (Instance → Mixins → Domains) to a streamlined 2-layer structure (Instance → Methods). This eliminates the delegation overhead and complexity while preserving all existing functionality and APIs.

Key Changes

• Architecture Simplification: Replaced mixin+domain pattern with single "Methods" classes that DagsterInstance inherits from directly
• Performance Improvement: Eliminated delegation layer for all domain operations
• Code Organization: All Methods classes organized in new methods/ folder for clear separation of concerns
• API Preservation: All public methods and signatures remain unchanged

Completed Domain Consolidations

• ✅ SettingsMethods - Settings and configuration management
• ✅ StorageMethods - Storage optimization and maintenance operations
• ✅ DaemonMethods - Daemon heartbeat and status monitoring
• ✅ RunLauncherMethods - Run submission and coordination
• ✅ EventMethods - Event logging and retrieval
• ✅ SchedulingMethods - Schedule and sensor management
• ✅ AssetMethods - Asset operations and materialization tracking

How I Tested These Changes

Existing test suite passes with all domain consolidations. Each Methods class preserves identical functionality to the original mixin+domain implementation.

Changelog

Internal architectural improvement - no user-facing API changes.