- Update memory architecture and contributing docs to describe .fusion/memory/ as the canonical layered workspace
- Reframe .fusion/memory.md references as a deprecated legacy fallback used only for migration/alias compatibility
- Expand the memory plugin contract with explicit layered layout, migration behavior, and invariant language
- Align settings reference memory-insight file descriptions with the canonical long-term memory model
- Rewrite memory backend contract docs to match shipped MemoryBackend interfaces, capabilities, and registry behavior
- Clarify .fusion/memory/ as the canonical layered workspace and keep .fusion/memory.md compatibility-only
- Document backend resolution through memoryBackendType with qmd as the default and qmd-to-file search fallback behavior
- Synchronize architecture, contributing, and settings reference docs with the updated memory model terminology
- Remove legacy .fusion/memory.md fallback references and normalize prompts/docs to .fusion/memory/MEMORY.md
- Stop legacy mirror writes and fallback reads in core memory backend and project memory flows
- Update engine worktree boundary checks and tests for canonical memory file handling
- Align dashboard memory/settings surfaces and route tests with canonical memory behavior
- Add model-favorites persistence test coverage for mission interview and new agent dialogs
- Update core and engine prompt text to reference .fusion/memory/ with MEMORY.md and daily-note guidance
- Allow worktree tool boundary access to .fusion/memory/ files while preserving legacy .fusion/memory.md compatibility
- Revise memory compaction/insight extraction messaging and related type/docs comments to use canonical memory paths
- Refresh dashboard and test expectations across core/engine/dashboard/docs for the new memory path wording
