## Summary
- Adds time-gap awareness to `_process_message` in `nanobot/agent/loop.py`
- When >5 minutes have passed since the last user message in a session, prepends `[SYSTEM ANNOUNCEMENT: X minutes/hours/days have elapsed since last user message]` to the current message content
- Keeps the LLM aware of real time elapsed between conversation turns
## Implementation Details
- Walks `session.messages` in reverse to find the last user message timestamp
- Uses `datetime.fromisoformat()` to parse the stored ISO timestamps
- Threshold: 300s (5 min) → formats as minutes, hours, or days
- Malformed timestamps silently skipped (try/except)
- Note: `session.add_message("user", ...)` runs **after** `build_messages`, so the reversed walk finds the *previous* user message — no off-by-one issue
- Only affects `_process_message`; `_process_system_message` (subagent announces) is unchanged
## Test plan
- [ ] Send two messages with >5 min gap — second message should log with `[SYSTEM ANNOUNCEMENT: X minutes have elapsed...]` prefix
- [ ] Send two messages with <5 min gap — no prefix injected
- [ ] Verify new session (no prior messages) — no prefix injected
🤖 Generated with [Claude Code](https://claude.ai/claude-code)
Co-authored-by: code-server <code-server@wylab.me>
Reviewed-on: #10
wylab
