Comment by hhh
17 hours ago
I use the constitution and model spec to understand how I should be formatting my own system prompts or training information to better apply to models.
So many people do not think it matters when you are making chatbots or trying to drive a personality and style of action to have this kind of document, which I don’t really understand. We’re almost 2 years into the use of this style of document, and they will stay around. If you look at the Assistant axis research Anthropic published, this kind of steering matters.
We've been using constitutional documents in system prompts for autonomous agent work. One thing we've noticed: prose that explains reasoning ('X matters because Y') generalizes better than rule lists ('don't do X, don't do Y'). The model seems to internalize principles rather than just pattern-match to specific rules.
The assistant-axis research you mention does suggest this steering matters - we've seen it operationally over months of sessions.
Except that the constitution is apparently used during training time, not inference. The system prompts of their own products are probably better suited as a reference for writing system prompts: https://platform.claude.com/docs/en/release-notes/system-pro...