durable-harness

durable-harness is Vercel's open source package that keeps a coding-agent turn going after its process dies. It logs each step so a new run can continue harnesses such as Claude Code and Codex.

Vercel's 19 October 2026 post calls durable-harness open source. The repository lists the Apache License 2.0, and local development uses the Workflow SDK's local World with no configuration. Last checked 22 Oct 2026.

Tags

• durability
• coding agents
• open source

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