Activate Mythos scaffold. Fable-distilled working patterns (decomposition, verification, next-action decision) plus a discipline framework (mode, tool-stack, context-priming, decomposition, agent-loop, verification, failure-recovery) and domain modes (research, migration) that push Opus-class and smaller models toward Mythos/Fable-grade agentic behavior. Use when starting complex multi-step work, long-horizon research, codebase migration, or tasks that benefit from systematic persistence and verification. Do NOT fully load on Fable 5 / Mythos 5; over-scaffolding degrades Mythos-class models.
2026-07-06