899ce4d put both pre-repair blobs back; both cells read red at HEAD (CHECK-env-verifiers 9 failures, test_python_env_check 5 failures + 2 errors). Restored byte-identically from ebba640 and bda365c. New closed_artifact_guard.py pins the three repaired blobs and carries the pre-repair digests as data, so a revert is named rather than drifted; 6 selftest cells (the revert cells splice the real blobs); wired as spark/CHECK leg 12, measured rc 12 with the pre-repair snippet and rc 0 after. Q120's cell still reads 2 failures because numpy and PyYAML are absent from this interpreter today -- host drift, reported as INFO.
snippet.py: check_tools() imports hermes_tools and requires callable(getattr(...));
--require is the negative-control hook; HERMES_HOME/HERMES_PROFILE/--home/--profile
resolve every path; rc 0/1/2. verify_hermes_setup.sh: HERE from $0, sibling
snippet.py graded, --home/--root/--profile, VERDICT line, rc 0/1/2.
New test_env_verifiers.py (14 black-box cells, stub hermes_tools on PYTHONPATH,
synthetic trees) and CHECK-env-verifiers. Pre-repair blobs: 9 cells red for
snippet.py, 6 for the shell script.
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