A reflective arXiv-format paper reading AC's own git history across the hand-written (2022-23), GPT-grafted (2024-mid25), and agentic-LLM (mid25-26) eras, asking whether the codebase is better off and what's worth preserving from the hand-written style. Built from a 6-agent evidence sweep over commit metadata + per-file inspection at era-boundary revisions; synthesized in the papers VOICE.md voice. - new papers/arxiv-hand-and-loop/ (handloop.tex + references.bib) - registered in cli.mjs PAPER_MAP, audits category, impact 14.5, index desc - metadata.json entry Note: cli.mjs + metadata.json also carry pre-existing uncommitted registration for the in-progress arxiv-nom paper (same file, not mine to strip). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>