Garry Tan is the CEO of Y Combinator and the author of the X Article "Meta-Meta-Prompting: The Secret to Making AI Agents Work." In the article, he describes returning to hands-on building because AI agents made it practical to create personal systems that compound across work, reading, meetings, and relationships.source: garry-tan-meta-meta-prompting-ai-agents-2026.md
Tan's core claim is that effective personal AI is not a chat window but an operating system: a thin harness routes work to fat skills, fat code, and a fat data layer. The model is treated as an interchangeable engine, while the durable value lives in the accumulated self-improving-knowledge-base, reusable skills, structured context, and automation loops.source: garry-tan-meta-meta-prompting-ai-agents-2026.md
His examples include book mirrors that map chapters to his own life context, meeting prep for a Demis Hassabis fireside chat, entity propagation after meetings, and daily crons for social media, Slack, email, and knowledge-graph updates. These examples connect personal-agents, harness-engineering, skillification, gbrain, and hermes-agent into a single compounding-system thesis.source: garry-tan-meta-meta-prompting-ai-agents-2026.md
Related pages: gbrain, skillification, harness-engineering, personal-agents, hermes-agent.