[wxai-space]

Summary

• Preserve the original optional Memcode adapter, documentation, and contributor commits from feat: add optional Memcode memory adapter #106.
• Align build_agent() name, adapter provenance, and allowed_agent_names for default and custom agent identities.
• Add offline agent.run() round-trip coverage for namespaced user IDs, retrieval hooks, and cross-user isolation.
• Keep Memcode SDK installation optional; no network or credential access at import time.

Testing

• Adapter and MemoryPolicy tests: 38 passed.
• Full tracked suite on current main plus this change: 365 passed, 1 skipped.
• compileall and git diff --check passed.
• The opt-in real Mem0 Graph security test remains skipped; no real Memcode service/SDK certification is claimed.

Related PR

Includes #106 plus the remaining review fixes, with contributor history preserved. This follow-up is hosted in the main repository because direct updates to the external contributor fork were unavailable.