Andrej Karpathy. Skip to the "ChatGPT memory, custom instructions" chapter at 1:53:29. Karpathy shows what he actually has in his own custom instructions, talks about when he tells ChatGPT to remember a fact versus letting it auto-capture, and notes the trade-offs — closer to the article's "set it up once with intent" framing than most beginner walkthroughs.
The reasoning about durable preferences is solid; the exact memory behavior may differ by product version, region and workspace setting. Do not store confidential client, employee or legal details as "preferences."
Understand how a power user separates durable preferences from one-off context.
Know where custom instructions and memory live in your current ChatGPT settings.
Continue through the same learning path with the next curated companion videos.
