[Kh4L]

stirrup_agent: reference paths did not match the sandbox

_build_gdpval_user_prompt listed reference files relative to the parent of
input_files_dir, advertising a gdpval_ref_files_<random>/ prefix. Stirrup copies the
contents of that directory into the sandbox working directory, so the prefix does not
exist there. Every reference-bearing task spent ~3 turns on failed ls/cd before
recovering via pwd && ls -la.

Paths are now relative to input_files_dir itself. Adds 3 regression tests covering flat
paths, nested subdirectories, and the no-references case.

scripts/wait_for_servers.sh: hardcoded 60s head-server wait

The phase-1 wait was fixed at 60s. On a Lustre-backed checkout Ray's API server routinely
takes 52-60s to come up — measured at 52s, 52s and 54s across separate runs before one
crossed the line and failed a 4-hour allocation. Now HEAD_MAX_WAIT, default 180s.

Both verified against the real component venv; the 3 new tests pass.

🤖 Generated with Claude Code

[copy-pr-bot]

This pull request requires additional validation before any workflows can run on NVIDIA's runners.

Pull request vetters can view their responsibilities here.

Contributors can view more details about this message here.