Tactus is Anthus's answer to the question, "What should agent software look like when reliability matters?" It is a language and runtime for building tool-using AI procedures that can pause, resume, checkpoint, call models, and ask for human intervention without forcing developers to reinvent that control flow in every project.
Many agent tools optimize for the first demo. Tactus optimizes for the moment you need the procedure to be inspectable, testable, restartable, and safe to operate in real environments. That makes it strategically important to Anthus, and important enough to feature separately on the site.
Tactus is the procedural core of the platform. It can call Plexus through MCP, use Biblicus for grounded retrieval, rely on Virtuus for local structured data, and fit naturally inside Korporus as part of a larger application runtime.
A common pattern is Biblicus + Tactus + Plexus: gather evidence, encode the repeatable procedure, then benchmark and improve the workflow over time.