Memory Search P3 Validation

This document captures the current P3 scope for session-memory backend separation work.

Scope

P3 focuses on separating the session-history backend implementation from the manager/runtime wiring.

Current improvements include:

• a backend contract in sagents/context/session_memory/backend.py
• a dedicated BM25 backend implementation in sagents/context/session_memory/bm25_backend.py
• a placeholder noop backend for session memory
• a factory entrypoint in sagents/context/session_memory/factory.py
• SessionMemoryManager reduced to a manager/delegation layer
• SessionContext now builds the manager through the backend factory instead of directly hardcoding one implementation
• matching file-memory backend/factory wiring under sagents/tool/impl/file_memory/

Test Suite

Primary P3 regression suite:

python tests/sagents/context/test_session_memory_manager.py
python tests/sagents/tool/impl/test_file_memory_backend.py

Current coverage includes:

• default backend selection
• noop backend selection
• backend delegation from SessionMemoryManager
• cache clearing delegation
• environment-driven backend selection
• unsupported backend rejection
• BM25 backend cache reset behavior
• file-memory backend factory selection
• noop file-memory backend behavior
• scoped-index file-memory backend cache reuse

Recommended Validation

Run the local validation for this branch:

python -m py_compile sagents/context/session_memory/backend.py sagents/context/session_memory/bm25_backend.py sagents/context/session_memory/factory.py sagents/context/session_memory/session_memory_manager.py tests/sagents/context/test_session_memory_manager.py
python tests/sagents/context/test_session_memory_manager.py
python tests/sagents/tool/impl/test_file_memory_backend.py
python tests/sagents/tool/impl/test_memory_tool.py

Unified entry:

python scripts/memory_search_validate.py

Notes

• this P3 step does not replace BM25 yet; it isolates it behind backend boundaries
• the goal is to make future session-history and file-memory backend changes independent from MemoryTool and SessionContext