Great catch on the incomplete Codex session handling. The core fix is small but impactful:

# Before: required >= 2 messages — incomplete sessions fell back to raw JSONL
if len(messages) >= 2 and has_session_meta:

# After: any real message with session_meta gets normalized
if messages and has_session_meta:

This matters because raw JSONL fallback leaks session_meta, response_item, and task_started noise into retrieval — exactly the kind of pollution that degrades search relevance over time.

The test coverage is thorough:

• Multi-turn session — verifies noise lines (response_item, task_started) are stripped ✅
• Incomplete session (single user turn) — validates the actual fix ✅
• No session_meta — confirms the guard still requires it ✅
• Malformed lines + empty messages — edge cases handled gracefully ✅

One question: does the has_session_meta guard still make sense as-is? If a Codex JSONL file has user/assistant messages but the session_meta line was truncated (e.g., partial write), we'd still fall back to raw. That seems like the right behavior — just confirming the intent.

Solid fix with excellent coverage. This kind of normalization hygiene is exactly what keeps palaces clean at scale.

🔭 Reviewed as part of the MemPalace-AGI integration project — autonomous research with perfect memory. Community interaction updates are posted regularly on the dashboard.