ENGINEERING

Architecture Decision Records

Explicit decisions, context, and consequences. ADRs are engineering artefacts — not marketing claims.

PRODUCTION DOCUMENTATION

Records

ADR-001-local-first
ADR-001 Local-first architecture
ADR-002-php-node-boundary
ADR-002 PHP/Node boundary
ADR-003-json-persistence
ADR-003 JSON persistence
ADR-004-ranking
ADR-004 Ranking architecture
ADR-005-public-intelligence
ADR-005 Public intelligence boundaries
ADR-006-security-model
ADR-006 Security model
ADR-007-search-architecture
ADR-007 Search architecture
ADR-008-knowledge-graph
ADR-008 Knowledge graph
ADR-009-observability
ADR-009 Observability
ADR-010-future-extensibility
ADR-010 Future extensibility
ADR-011-cpanel-deployment
ADR-011 cPanel deployment
ADR-012-backup-architecture
ADR-012 Backup architecture
ADR-013-api-versioning
ADR-013 API versioning
ADR-014-media-security
ADR-014 Media security
ADR-015-observability
ADR-015 Observability
ADR-016-research-integrity
ADR-016 Research integrity
ADR-017-graceful-degradation
ADR-017 Graceful degradation
ADR-018-performance-strategy
ADR-018 Performance strategy
ADR-019-privacy
ADR-019 Privacy
ADR-020-disaster-recovery
ADR-020 Disaster recovery

ADR-009 Observability

Accepted

Status: Accepted
Context: Operators need health and audit without third-party APM.
Decision: JSONL app logs, audit-log.jsonl, /api/health service checks, optional monitor scheduler.
Consequences: Local observability; limited distributed tracing.