AINovaTools

Last updated: 10/22/2026Last verified: 2026-10-21

durable-harness

durable-harness

5
0

Vercel Labs open-source runtime for running coding-agent harnesses such as Claude Code, Codex, OpenCode, Pi, and fx as durable workflow sessions. It records conversations, in-flight turns, model calls, and tool calls so interrupted work can resume after crashes, timeouts, or redeploys.

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<p>Vercel Labs open-source runtime for running coding-agent harnesses such as Claude Code, Codex, OpenCode, Pi, and fx as durable workflow sessions. It records conversations, in-flight turns, model calls, and tool calls so interrupted work can resume after crashes, timeouts, or redeploys.</p><ul><li>Run Claude Code, Codex, OpenCode, Pi, or fx through a durable Workflow SDK World</li><li>Persist conversations, in-flight turns, model calls, and tool-call outcomes in an event log</li><li>Resume interrupted sessions after crashes, function timeouts, dropped connections, or redeploys</li><li>Support local development, Vercel deployment, and self-hosted Worlds such as Postgres</li></ul>

Details

Platform

WebLinuxmacOSWindows

Features

  • Run Claude Code, Codex, OpenCode, Pi, or fx through a durable Workflow SDK World
  • Persist conversations, in-flight turns, model calls, and tool-call outcomes in an event log
  • Resume interrupted sessions after crashes, function timeouts, dropped connections, or redeploys
  • Support local development, Vercel deployment, and self-hosted Worlds such as Postgres

Languages

en

Best for

Teams embedding resumable coding agents into web applicationsDevelopers who need agent sessions to survive crashes, timeouts, and redeploysPlatform engineers evaluating Vercel, local, or Postgres-backed durable agent execution

Known limitations

  • The project is experimental and remains on 0.0.x, so package APIs may change between releases
  • Claude Code and Codex integrations run only in the session's Vercel Sandbox rather than a shared function
  • Self-hosting beyond local development requires choosing and operating a compatible Workflow SDK World such as Postgres
  • Vercel deployment uses AI Gateway and a linked project; model, sandbox, and infrastructure usage can add separate costs

Alternatives

Kiro — A broader AWS coding environment with shared agent workflows rather than a runtime library
DeepSeek Harness — A local-first agent framework for composing models, tools, sandboxes, and workflows
OpenCode — An agent harness that durable-harness can run rather than a durability layer itself
View all durable-harness alternatives →

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