ccMarvin vs Co

Marvin watches every company you back, private or public, and delivers the signals that matter: exec changes, acquisitions, product releases, funding rounds. Straight to...

Every AI coding agent signs its commits with a forgeable plain-text line.

About ccMarvin

Marvin watches every company you back, private or public, and delivers the signals that matter: exec changes, acquisitions, product releases, funding rounds. Straight to your inbox. Research, summaries, planning help, and life analysis, delivered to your inbox. 2026-09-07, Teased the Grok 5 training run, "biggest cluster yet", and said the Cybercab line is running ahead of schedule. 2026-09-06, Essay follow-up: interpretability results are moving into production Claude models.

About Co

Every AI coding agent signs its commits with a forgeable plain-text line. Co-authored-by is a Lie: Cryptographic Provenance for AI Coding Agents . It matters now, because the attribution metadata is starting to be used to make trust decisions, and that turns a cosmetic line into an attack surface. Commit metadata has always been trivial to fake unless signing is enforced. So over a couple of evenings I built the missing half: a producer-attribution layer where attribution is backed by a hardware key, enforced automatically, and verifiable .