# Concelier ConfigDiff Tests Charter

## Mission
- Validate config diff behaviors for Concelier configuration surfaces.

## Responsibilities
- Exercise configuration comparison logic and determinism.
- Cover edge cases (missing keys, ordering, default values).

## Required Reading
- docs/README.md
- docs/07_HIGH_LEVEL_ARCHITECTURE.md
- docs/modules/platform/architecture-overview.md
- docs/modules/concelier/architecture.md
- docs/modules/concelier/link-not-merge-schema.md

## Working Agreement
- Use fixed times and IDs in tests.
- Assert deterministic ordering and invariant formatting.
- Avoid network dependencies in tests.

## Testing Strategy
- Unit tests for config diff logic and normalization.
- Regression tests for deterministic output.