Codex Best Practices
A practical guide to OpenAI Codex based on the latest official docs: task prompts, AGENTS.md, environments, permissions, validation loops, MCP, Skills, Automations, and code review workflows.
GitHub Copilot CLI Best Practices
A practical guide to the latest GitHub Copilot CLI docs: setup, custom instructions, tool permissions, Plan/Autopilot/Fleet, MCP/LSP/Skills, automation, remote sessions, models, and safe agent workflows.
GPT-5.5 Best Practices
A complete guide to OpenAI GPT-5.5 official recommendations — new features, behavioral changes, prompt patterns, and full examples.
Claude Mythos: Anthropic Built a Model That Finds Zero-Days—Then Locked It Away
GPT-6 Pretraining Complete: 18 Months, 100k H100s, 2M Token Context
April 14, 2026—OpenAI officially confirms GPT-6 pretraining completed March 17, after 18 months. 5-6 trillion parameters (MoE), 2M token context, 200B activated. Greg Brockman: 'not incremental improvement, but a major change in how we think about model development.'
When AI Agents Go Off the Rails: From Model Worship to Environment Engineering
Models keep getting stronger, yet AI Agents still 'forget,' go out of bounds, and repeat mistakes in production. The problem isn't the model—it's how little engineering effort goes into the runtime environment. Harness Engineering, emerging in 2026, tries to fix this.