Scoring AI character live in chat, engine open-sourced

Users can now see, in a sidebar, each Claude response scored in real time across seven Aristotelian virtues while they chat — the tool, Virtue Council, is live, and its scoring engine is open source.

Before this, such character measurement existed only in Anthropic's persona vector and identity drift research; ordinary users had no way to see quantified character feedback during a conversation.

Researcher Jack Chang announced B-Side Labs on September 22 and released the tool; the author reports that Temperance showed the widest within-session swing (0.2 to 0.8), while noting the metric weights response length, so the swing may reflect verbosity rather than disposition. One pilot observation is worth noting: after seeing the sycophancy score, users became more skeptical.

Boundary: this is a self-announcement with a self-run pilot, not an independent evaluation, and follows a black-box route; the pilot had only 20 users, with no third-party replication yet.