✨ feat: introduce OpenAgent universal agent with session management
Major architectural refactoring:
- Add OpenAgent as universal primary agent for questions, tasks, and workflows
- Implement session-based context management with manifest tracking
- Reorganize subagents into logical categories (code/core/utils)
- Add dynamic context discovery and loading system
- Introduce cleanup script for stale sessions
- Update registry with new categorization (essential/standard/extended/specialized/meta)
- Rename 'core' profile to 'essential' and add 'business' profile
- Add comprehensive documentation with visual diagrams
- Update installation script with new profiles
Breaking changes:
- Subagent paths changed from analysis/core to code/core/utils
- Profile 'core' renamed to 'essential' (backward compatible)
New features:
- Session isolation for concurrent agent instances (.tmp/sessions/)
- Automatic stale session cleanup (>24 hours)
- Manifest-based context indexing and discovery
- Business profile for content-focused workflows
- OpenAgent with plan-approve-execute-validate-summarize workflow
Components: 32 total (3 agents, 13 subagents, 8 commands, 2 tools, 2 plugins, 2 contexts, 2 config)
Documentation:
- docs/agents/openagent.md - Comprehensive guide with Mermaid diagrams
- docs/guides/building-with-opencode.md - Power user formula
- scripts/README.md - Script documentation
- .opencode/context/core/context-management.md - Session management strategy
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