Blog
Claude Code Frontmatter: the 4 MEMORY.md Types Explained
The 4 frontmatter types in Claude Code's MEMORY.md (user, feedback, project, reference): what each is for, when the LLM picks it, and where it breaks at scale.
[ AI_OPERATOR_—_BLOGS ]
Long-form writing on production AI agent engineering — validation loops, tool-call reliability, completion ownership, context engineering, cost forensics.
Other track:
SecurityLab — Blogs →
Blog
Claude Code Source Leaked: Kairos, Undercover Mode, Ultraplan — 5 Hidden Features (510K Lines)
Claude Code v2.1.88 accidentally exposed 510K lines. The 5 hidden features: Kairos (permanent memory), Undercover Mode (stealth), Ultraplan (deep planning), Pet System (Buddy), Multi-Agent. Source-cited.
Blog
The AI Stack Explained: LLM Talks, Program Walks
A first-principles breakdown of the entire AI stack — from LLM to Agent in one mental model. An LLM can only output text. Everything else is the program.