About AI Anxiety
Facing the information anxiety of the AI era, shift your focus from external standards back to what you are doing: fight anxiety with action, and go to the bottom rather than trying to keep up with everything.
3 min read
All Notes
Browse Jason's public notes by topic.
AI Frontiers
Can an Investing Agent Actually Make Me Money?
Live-money experiments show AI agents occasionally win, but are far from a stable strategy: the ones already making money are brokers, advisors, and course sellers, while an ordinary user relying on it for sustained gains is still an open question.
16 min readEmbodied AI 2026: Robots Can Outrun Humans, So Why Can't They Fold a Shirt?
A robot that can run doesn't mean it can work: the half-marathon record has been broken, but cooking, laundry, and folding clothes are still limited by complex environments and long-flow reliability; what can really scale in the near term is more likely factories and warehouses.
13 min read
AI Engineering
AI Coding: From Chat to an Agent-Driven Workflow
The point of AI coding is not to treat AI as a chat window, but to let an agent work inside a real project, accumulate compounding assets, and use a test-and-feedback loop to guarantee quality.
4 min readGraphRAG Two Years Later: Still Maintained, but Useless for Most Scenarios
Two years after GraphRAG was open-sourced it's still maintained, but most RAG scenarios don't need it in practice: for simple fact retrieval it's a negative asset; only multi-hop reasoning, cross-document synthesis, and relational queries are worth it — and it's more expensive and harder to maintain.
14 min readHow Prompt Caching Works: Hit Rate Is Decided by Prefix Stability
Under the same model, cache hit rate can differ by 4x — and it's not the model: prefix byte stability decides the hit rate. Explains the cache mechanism, seven real cache-breaking incidents, and how to avoid the pitfalls.
16 min readMem0 Raised $24M and Stored 97.8% Garbage
While Mem0 announced a $24M raise, an independent audit found 97.8% of the 10,134 memories it stored over 32 days were garbage: agent-memory commercialization is running ahead of verifiable quality.
15 min readThe One Without a Sandbox Wrote "No Sandbox" Into Its Docs
Claude Code, Cursor, Codex, and OpenCode compared on sandboxing and security interception: where the boundary is placed, and who can see it when it fails.
11 min read