Agent runtimes
Tool-use, planning.
Agent runtimes that don't just call APIs but reason about what they returned. Tool-use, planning loops, verification, and the structured failure modes you need before an agent touches production.
Where agents are real, and where they aren't yet
Agents are real in narrow, well-instrumented domains with clear success criteria and reversible actions. They are not yet real for open-ended, irreversible decisions in unfamiliar systems. We build for the first category and we're honest about the second — including with our own portfolio companies.
What we build into agent runtimes
Tool registry
Typed, versioned tools with explicit auth, rate-limit, and side-effect contracts.
Planner
Decomposition strategies suited to the domain — tree, graph, or replanning loop.
Verifier
A second pass that checks the work before the agent commits an action.
Memory
Episodic, semantic, and working memory — each with explicit eviction policy.
Sandboxing
Capability-scoped execution. The agent can only touch what the operator allowed.
Human-in-the-loop
Confidence-scored escalation. The agent knows when to stop and ask.