scripts/codex_arm.py drives OpenAI Codex CLI end-to-end on the same
transcripts: chunk-file reads until its REAL auto-compaction fires (verified
via compacted events in the rollout jsonl; peak 455-483K vs its 258K
window), then quizzes post-compaction with the identical question banks and
judge. Results (results/codex-arm-2026-08-15/): codex 36.7% avg vs lean
closed-book 40.0% vs lean+recovery 68.3%. Codex has no runtime re-access
over its rollout history — the session_search differentiator, measured.