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Durable agents for the JVM

Durable agents, without giving up control.

Cortavyn is a composable Java foundation for model interactions, stateful workflows, and agents that can safely carry work across interruptions.

Capabilities

Use the layer your application needs.

Each module has a focused responsibility. Combine them only when your system requires it.

01 / CHAT

A portable loop for models and tools.

Keep conversations, tool calls, structured output, and progress signals separate from every provider protocol. Your application still owns the work.

Explore Chat

02 / GRAPH

Workflows that continue where they left off.

Model durable state with checkpoints, explicit routes, retries, streaming, and human interrupts. A run stays inspectable and resumable by design.

Explore Graph

03 / DEEP AGENT

Agents that can work, pause, and ask.

Provide an isolated workspace, planning, skills, and specialists. Risky actions become explicit approvals instead of invisible side effects.

Explore Deep Agent

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