The four underdocumented core trait files now include trait-level doc blocks
explaining purpose and architecture role, method-level documentation with
parameter/return/error descriptions, and public struct/enum documentation.
This brings parity with the well-documented provider, channel, tool, and
memory traits, giving extension developers clear guidance for implementing
these core extension points.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
- Expand communication style presets (professional, expressive, custom)
- Enrich SOUL.md with human-like tone and emoji-awareness guidance
- Add crash recovery and sub-task scoping guidance to AGENTS.md scaffold
- Add 'Use when / Don't use when' guidance to TOOLS.md and runtime prompts
- Implement memory hygiene system with configurable archiving and retention
- Add MemoryConfig options: hygiene_enabled, archive_after_days, purge_after_days, conversation_retention_days
- Archive old daily memory and session files to archive subdirectories
- Purge old archives and prune stale SQLite conversation rows
- Add comprehensive tests for new features
