- runner._run_cmd: the write of the prompt file was outside the cleanup
and error handling that the exec had (merge review: claude H1, codex R1).
A failed write now removes the partial file and returns the same 126
failed submit an unstartable wrapper does, so the loop ends with rc 1
and no traceback. Test S4c.
- test S9 required the literal "File too large" in stderr; bash 3.2 on
macOS prints nothing for EFBIG, so the whole suite failed on this host
(agy, grok, codex R2). The contract asserted everywhere is rc != 0, no
leftover file and the portable diagnostic line; the libc wording is
checked on Linux only.
- the wrapper accepted an empty --prompt-file and registered an empty
prompt (claude H3); it is refused now. Test S1e.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff