The runtime context (channel/chat_id) is now included in the system
prompt instead of being a separate user message. This is a deliberate
design change to simplify the message structure.
Changes:
- ✅ Updated test to expect runtime context in system prompt
- ✅ Updated test description to reflect new behavior
- ✅ Removed assertions for separate user message
Test now passes with the current implementation.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>