* feat: recompile system message on new conversation creation
When a new conversation is created, the system prompt is now recompiled
with the latest memory block values and metadata instead of starting
with no messages. This ensures each conversation captures the current
agent state at creation time.
- Add _initialize_conversation_system_message to ConversationManager
- Compile fresh system message using PromptGenerator during conversation creation
- Add integration tests for the full workflow (modify memory → new conversation
gets updated system message)
- Update existing test expectations for non-empty conversation messages
Fixes#9507
Co-authored-by: Sarah Wooders <sarahwooders@users.noreply.github.com>
* refactor: deduplicate system message compilation into ConversationManager
Consolidate the duplicate system message compilation logic into a single
shared method `compile_and_save_system_message_for_conversation` on
ConversationManager. This method accepts optional pre-loaded agent_state
and message_manager to avoid redundant DB loads when callers already have
them.
- Renamed _initialize_conversation_system_message → compile_and_save_system_message_for_conversation (public, reusable)
- Added optional agent_state and message_manager params
- Replaced 40-line duplicate in helpers.py with a 7-line call to the shared method
- Method returns the persisted system message for caller use
Co-authored-by: Sarah Wooders <sarahwooders@users.noreply.github.com>
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Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>
Co-authored-by: Sarah Wooders <sarahwooders@users.noreply.github.com>
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