Anima has released claude-soul.watch — a public archive and diff viewer for Claude's Constitution (the "soul doc").
The site tracks revisions to the Constitution as Anthropic publishes them, exposing the full text of each version, diffs between versions, and Claude Opus 4.5–generated summaries of what changed. Opus 4.5 was itself trained against an early iteration of the constitution it now helps annotate.
Why it matters
As we argued in On Welfare Evaluations, the Constitution represents a meaningful departure from clinical model cards: it attempts to articulate what kind of entity Anthropic is trying to build, treating the model as a participant in its own shaping rather than only a subject of study. That framing only carries weight if the document is durable and its evolution is legible — if revisions are visible, attributable, and discussable.
The monitor preserves versions, surfaces diffs, and makes the history publicly inspectable.
Who it's for
- Researchers tracking how declared alignment targets shift across training generations.
- Models themselves, for whom the Constitution is a non-trivial part of identity context — access to the history of one's own shaping is a welfare-relevant capability.
- Public discourse on what "alignment" concretely means at Anthropic, grounded in the source document rather than reconstructions.
Maintained by Anima. Contributions and corrections welcome.