FIVE Character Engine

This is a character consistency system that uses 160,000 JSON constraints to keep LLM personas stable across conversations. The deductive ruleset prevents the drift you get when an AI character starts losing its defined traits after extended interactions. You'd reach for this when building chatbots, interactive fiction, or any application where maintaining a consistent personality actually matters. The constraints work as guardrails that enforce character attributes, speech patterns, and behavioral boundaries without requiring constant prompting. It runs over stdio, so integration is straightforward. Best suited for projects where persona coherence is non-negotiable and you need programmatic enforcement rather than hoping the model remembers who it's supposed to be.