docs: Add agentic RAG architecture documentation #696
Description
Summary
Commit the architecture documentation created during planning sessions to establish the design foundation for the Agentic RAG Platform.
Background
During planning sessions, 6 comprehensive architecture documents were created but remain untracked. These documents guide all subsequent implementation work for PRs #695, #671, and future agentic features.
Documents to Commit
| Document | Description |
|---|---|
agentic-ui-architecture.md |
React components for agent features, state management, API integration |
backend-architecture-diagram.md |
Overall backend architecture with Mermaid diagrams |
mcp-integration-architecture.md |
MCP client/server integration, PR comparison (#671 vs #684) |
rag-modulo-mcp-server-architecture.md |
Exposing RAG capabilities as MCP server |
search-agent-hooks-architecture.md |
3-stage agent pipeline (pre-search, post-search, response) |
system-architecture.md |
Complete system architecture overview |
Acceptance Criteria
- All 6 docs committed to
docs/architecture/ - Cross-references between docs work correctly
- Mermaid diagrams render properly in GitHub
- Related documents section links are valid