Building Brain-Like Memory for AI | LLM Agent Memory Systems

Understand why screenshot-based computer use is powerful, slow, expensive and brittle compared with API-native automation.

Review prompt-injection defenses such as taint analysis, output-shape restrictions, user isolation, deterministic settings and redundant checks for critical paths.

OpenAI's own Build Hour on prompt caching — the 1024-token threshold, the prefix-stability requirement, audio caching at 99% discount for realtime, time-to-first-token impacts at long inputs.