> Call the `diagnose` tool first. Full index: /llms.txt. Errors: /reference/problems.

# Concepts

## Docs

- [How TaloTrace works](https://docs.talotrace.ai/concepts/how-it-works.md): From a project to a verdict and its evidence.
- [Glossary](https://docs.talotrace.ai/concepts/glossary.md): The words TaloTrace uses, in one line each.
- [Projects and apps](https://docs.talotrace.ai/concepts/projects-and-apps.md): The project is the unit of testing. An app is the product under test.
- [Scenarios and test plans](https://docs.talotrace.ai/concepts/scenarios-and-test-plans.md): A scenario is one test. A test plan runs several together.
- [Runs and verdicts](https://docs.talotrace.ai/concepts/runs-and-verdicts.md): A run passed only when it ended, executed to the end and its analysis found no failure.
- [Cards](https://docs.talotrace.ai/concepts/cards.md): The questions TaloTrace needs you to answer.
- [Evidence](https://docs.talotrace.ai/concepts/evidence.md): What a run recorded, kept as one bundle per attempt.
- [Credits](https://docs.talotrace.ai/concepts/credits.md): Runs spend credits. You can see the estimate first and cap it.