ccMarvin vs Promptowl

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

Cloud memory forgets why it changed something. Here's how to build a second brain with Claude and a governed context layer, and follow along step by step.

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 Promptowl

Cloud memory forgets why it changed something. Here's how to build a second brain with Claude and a governed context layer, and follow along step by step. Ask Claude or ChatGPT to remember something and it will, for that conversation. Projects help, but unless you actively update them, the context drifts and you have to repeat the details in every new chat. Markdown-based second brains are how you organize your knowledge to solve the persistent memory problem.