---
id: multi-user/processtransport-is-not-ready-for-writing
title: "`ProcessTransport is not ready for writing` — survivable since `8c4f150`, still unexplained"
theme: multi-user
status: open
created: 2026-08-11
date_source: stated
order: 6
---

**`ProcessTransport is not ready for writing` — survivable since `8c4f150`, still unexplained.** A
floating rejection inside the SDK's own input pump, with no frames from our code, so no `await` of ours
can catch it. It crashed `officer-agent` four times on 2026-08-11, once truncating a turn mid-sentence;
the `unhandledRejection` backstop has caught it once since. Best hypothesis is the `claude` CLI exiting
while `streamInput` is still pumping. It needs looking at after the next occurrence, not catching in the
act — markers to grep in `docs/open-threads-after-per-user-claude.md` §3.