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Bernt 02b51d7814 PR-002: Persistence Adapters — in-memory, zero external dependencies

- Repository interfaces defined by domain (@landvex/domain)
- 6 in-memory adapters: Session, Mission, DecisionCase, Artifact, EventStore, UnitOfWork
- 9 tests verifying adapter contracts
- Domain unchanged — infrastructure depends on domain, never reverse
- ADR-006: In-Memory Adapters for Testing

Definition of Done met:
- All adapters compile against domain interfaces
- Unit tests pass (9/9)
- No PostgreSQL, S3, Express, AI in this PR
- Ready for PR-003: PostgreSQL adapters

2026-07-02 14:59:37 +00:00

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ADR-006: In-Memory Adapters for Testing

Status

Accepted

Context

The domain model needs to be tested without external dependencies (PostgreSQL, S3, etc.). We need fast, isolated tests that verify domain behavior.

Decision

Implement in-memory adapters for all repository interfaces:

InMemoryFieldSessionRepository
InMemoryMissionRepository
InMemoryDecisionCaseRepository
InMemoryArtifactRegistry
InMemoryEventStore
InMemoryUnitOfWork

These adapters:

Implement the same interfaces as production adapters
Store data in memory (Map, Array)
Can be reset between tests
Are never used in production

Consequences

Positive

Tests run in milliseconds
No database setup required
Parallel test execution safe
Documents how repositories are used

Negative

Not production-realistic (no transactions, no persistence)
Need separate integration tests for production adapters

ADR-001: Domain knows nothing about AI
ADR-002: Artifact is common base contract
ADR-003: Event Sourcing for traceability

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