Managed Deep Agents: LangSmith Launches API-First Hosted Runtime for Durable Agent Execution
Create and run deep agents in LangSmith’s managed runtime via the /v1/deepagents API, enabling durable threads, checkpointing, sandboxed execution, and Context Hub for persistent state.
Join the private beta waitlist and begin creating managed agents via the /v1/deepagents API.
Summary
LangSmith has unveiled Managed Deep Agents, a private‑beta, API‑first hosted runtime that lets developers run long‑running agents without building their own infrastructure. The new runtime, accessible via the /v1/deepagents endpoint, supports durable threads, streaming runs, checkpointing, and human‑in‑the‑loop workflows. Agent definitions—including AGENTS.md, skills/, subagents/, and tools.json—are stored and versioned in LangSmith, while Context Hub provides persistent, updatable context across runs. Sandbox‑backed execution enables code, shell commands, and file I/O, and all runs are automatically traced in LangSmith for observability.
With Managed Deep Agents, teams can focus on agent behavior rather than managing runtime, file storage, tool configuration, or tracing. The private beta is open to design partners first, with no custom server required, and ships with Deep Agents v0.6 by default.
This launch gives developers a durable, observable, and scalable path to production for agents that need long horizons, tool use, and persistent context.
Key changes
- Managed Deep Agents API under /v1/deepagents allows programmatic creation, update, and execution of agents
- Runtime supports durable threads, streaming runs, checkpointing, and human‑in‑the‑loop workflows
- Agent definition files (AGENTS.md, skills/, subagents/, tools.json) are stored and versioned in LangSmith
- Context Hub provides persistent context storage across runs, enabling agents to learn from real usage
- Sandbox‑backed execution supports code, shell commands, and file I/O for tool workflows
- All runs are automatically traced in LangSmith, giving full observability of tool calls and intermediate steps
- Private beta launch with design partner access; no custom server needed