{"id":"clm_C57418A7863D","entity":"vercel","predicate":"feature_added","value":"fx harness host adapter","value_json":{"feed":"vercel-changelog","item":"https://vercel.com/changelog/fx-harness-adapter-now-separates-host-and-sandbox","tags":{"v":2,"ai":false,"by":"claude-haiku-5-5","on":"2026-10-31","themes":["developer_platform"]},"check":{"on":"2026-10-29","url":"https://vercel.com/changelog/fx-harness-adapter-now-separates-host-and-sandbox","pages":1,"quote":"The fx adapter now runs the harness on the host Felix Arntz Software Engineer Blog Changelog 29 Oct 2026 1 min read Copy The fx adapter for the AI SDK’s HarnessAgent now uses libfx , the TypeScript library for fx. The harness and model requests run in your application’s process","outcome":"checked"},"evidence":"The fx adapter now runs the harness on the host","extracted_by":"claude-haiku-5-5","redated_from":"clm_4D3E31BDFA4D","primary_source":true},"valid_from":"2026-10-29","valid_to":null,"published":"2026-10-27","recorded":"2026-10-29","confidence":0.7,"status":"valid","assertable":true,"superseded_by":null,"supersedes":[],"first_seen_at":"2026-10-29T21:37:34.515904+00:00","updated_at":"2026-10-31T02:59:21.871211+00:00","sources":[{"url":"https://vercel.com/changelog/fx-harness-adapter-now-separates-host-and-sandbox","tier":"primary","publisher":"Vercel","published_at":"2026-10-27T00:00:00+00:00"}],"evidence":{"by":"page-read","on":"2026-10-29","quote":"The fx adapter now runs the harness on the host Felix Arntz Software Engineer Blog Changelog 29 Oct 2026 1 min read Copy The fx adapter for the AI SDK’s HarnessAgent now uses libfx , the TypeScript library for fx. The harness and model requests run in your application’s process","url":"https://vercel.com/changelog/fx-harness-adapter-now-separates-host-and-sandbox","excerpt":"The fx adapter now runs the harness on the host"},"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day its period closed). published: the earliest day a source on the record published it (a filing's filing date, a post's date; null when no source carries one). recorded: the day AsOf first held it. A figure can take effect weeks before it is published.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date"}}}