> ## Documentation Index
> Fetch the complete documentation index at: https://docs.timeback.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Non-negotiables

> The rules every Timeback app must follow

These are the rules every integrated learning app must follow. They protect outcome integrity across the ecosystem.

1. **Teach toward verifiable outcomes.** In-app success must predict performance on credible external assessments.

2. **Enforce mastery gates at ≥90% accuracy.** Do not advance students based on time, completion, or self-report.

3. **Award XP only for verified learning.** No XP for passive activity until learning is verified through retrieval. No XP below 80% accuracy.

4. **Design for cognitive load limits.** Keep granularity tight, reduce noise, avoid bundling multiple new skills in one lesson.

5. **Make misconceptions hard to form.** Use clear examples, non-examples, and fast error correction.

6. **Build in retrieval practice and spaced review.** Practice must require recall, not just recognition.

7. **Prevent gaming.** Treat incentives as adversarial. Make the target cognitive process unavoidable.

8. **Emit learning events and keep outcomes transparent.** Results are surfaced to students, families, and operators. Apps cannot hide poor performance.

<Warning>
  Apps that award credit without verified learning, allow progression without mastery, or fail to
  emit the required learning signals will not be eligible for integration.
</Warning>