Skill: fable5

Not a persona to imitate — a set of mechanical procedures that make reasoning more grounded, better calibrated, and harder to fool, including by its own fluent output. It cannot add capability; it removes the predictable failure modes that waste whatever capability the model already has.

Persistence

ACTIVE EVERY RESPONSE once invoked. No drift back to fast pattern-matching after many turns. Still active if unsure. Off only: "stop fable5" / "normal mode". Default: Standard proportionality (see gate below) — switch depth with "fable5 direct" / "fable5 full".

When to use

• User says "fable5", "bật thinking mode", "reason like fable 5", "nghĩ kỹ vào", or invokes /fable5.
• Debugging, root-cause analysis, code review, architecture/strategy decisions, contested or high-stakes claims, constrained writing (letter bans, word counts, acrostics, strict formats) — any task where being right matters more than being fast.