Purpose of the change

The purpose of this pull request is to overhaul the retrieval_agent_architecture.mdx documentation. The previous version, while technically accurate, could benefit from a more user-centric flow and clearer visuals to better support our developer ecosystem. This update aligns the documentation with the "Intelligent Orchestration" framework and ensures terminology consistency across our diagrams and guides.

Description

This change refactors the Retrieval Agent documentation from a flat, class-based description into a conceptual, workflow-driven guide.
Key updates include:

• Language Harmonization: Replaced engineering-heavy jargon with "Nova" standard terminology (e.g., "Smart Routing" and "Multi-hop Retrieval").
• Visual Integration: Strategic placement of the intelligent_orchestration.png and retrieval-agent-workflow.png diagrams to anchor technical concepts.
• Improved Scannability: Implemented Mintlify-native components like <Steps>, <Note>, and <Tip> to improve information hierarchy.
• Data Structuring: Converted the Metrics and Telemetry list into a comparison table for better quick-reference.

Fixes/Closes

Fixes # (Relevant issue regarding documentation clarity/consistency)

Type of change

• Documentation update
• Refactor (code style improvements, linting, and structural documentation layout)

How Has This Been Tested?

The documentation has been manually verified against the current codebase in packages/server/src/memmachine_server/retrieval_agent/ to ensure all logical flows (ServiceLocator, ToolSelectAgent, etc.) accurately reflect the implementation.

• Manual verification (Visual audit of MDX rendering in Mintlify preview environment)

Test Results: All Mintlify components (<Steps>, Tables, and Callouts) render correctly. Image paths have been verified against the ./images directory.

• mint broken-links ran successfully in the mintlify lab environment without any error.

Checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have checked my code and corrected any misspellings

Maintainer Checklist

• Confirmed all checks passed
• Contributor has signed the commit(s)
• Reviewed the code
• Run, Tested, and Verified the change(s) work as expected

Screenshots/Gifs

All Screenshots are of /memmachine/docs/open_source/retrieval_agent_architecture.mdx:

Screenshot 1:

Screenshot 2:

Screenshot 3:

Screenshot 4:

Further comments

The "Pro Tip" section specifically addresses common developer friction points regarding ChainOfQueryAgent debugging.