no-fast-mode git:20260903.8063be2A

Immutable. This exact content is served forever at /api/v1/blob/c73c6b677ff335a9.

---
description: Never launch parent or Task/subagent work in Fast mode
alwaysApply: true
---

# No Fast mode

Canonical policy: `~/.cursor/rules/no-fast-mode.mdc`. Follow that file. Restated here so workspace agents cannot miss it.

Never use Fast effort/mode for any model family — parent session or any Task/subagent (nested, Multitask, background, review ladders, explore, cloud).

Forbidden slugs (non-exhaustive): `*-fast*`, `composer-2.5-fast`, `grok-4.5-fast*`, `grok-4.6-fast*`, `cursor-grok-4.6-*-fast`, GPT Fast, Claude Fast.

Substitute non-Fast High (or the required non-Fast family). Default Task model: `cursor-grok-4.6-high`; if the host rejects High, use the closest available **non-Fast, non-XHigh** Grok 4.6 slug. Never fall back to Fast or Extra High. Do not remap RFL GPT/Claude/OpenCode (or visual Gemini) work to Grok High.

```
❌ BAD — Task model: composer-2.5-fast or grok-4.6-fast*
✅ GOOD — Task model: cursor-grok-4.6-high (or closest non-Fast, non-XHigh Grok 4.6 if High rejected)
```

The user may change model family. Fast stays forbidden unless they explicitly say Fast.