`--as-of` might be the most important feature in your codebase. Temporality of relationships is way way more important than I thought when I first started down the path of modeling relational data in agentic systems. Sometimes knowing why or why not at a glance can be the difference between spending another $50 on tokens retreading old ground. This is very cool, and I will probably discard my handrolled version in favor of your much more robust solution.

Have you considered allowing annotation of why something changed as part of a tx?