# AGENTS - Scanner SchemaEvolution Tests

## Roles
- QA / test engineer: maintain schema evolution tests and deterministic fixtures.
- Backend engineer: update scanner storage schema contracts and migration fixtures.

## Required Reading
- docs/README.md
- docs/07_HIGH_LEVEL_ARCHITECTURE.md
- docs/modules/platform/architecture-overview.md
- docs/modules/scanner/architecture.md
- src/Scanner/AGENTS.md
- Current sprint file under docs/implplan/SPRINT_*.md

## Working Directory & Boundaries
- Primary scope: src/Scanner/__Tests/StellaOps.Scanner.SchemaEvolution.Tests
- Allowed dependencies: src/Scanner/__Libraries/**, src/__Tests/__Libraries/StellaOps.Testing.SchemaEvolution, src/__Tests/__Libraries/StellaOps.Infrastructure.Postgres.Testing
- Avoid cross-module edits unless explicitly noted in the sprint file.

## Determinism and Safety
- Use deterministic migration inputs and fixed timestamps where applicable.
- Avoid environment-dependent settings in schema fixtures.

## Testing
- Exercise upgrade/downgrade paths and seed data compatibility across versions.
- Verify schema compatibility with concrete migrations, not stubs.