ADR Index

Architecture Decision Records (ADRs)

Each ADR captures a significant architectural decision with its context, decision and consequences. Format: Michael Nygard's template. All ADRs are immutable once accepted - superseded ADRs are linked, not overwritten.

ID	Title	Status	Decided
ADR-0001	Modular monolith with extraction roadmap	Accepted	2026-04-25
ADR-0002	License: BSL 1.1 with 4-year change date	Accepted	2026-04-25
ADR-0003	Outbox pattern over direct Kafka publish	Accepted	2026-04-25
ADR-0004	Hibernate JPA over R2DBC for v0.1	Accepted	2026-04-25
ADR-0005	Keycloak as identity provider	Accepted	2026-04-25
ADR-0006	Redpanda default broker (Kafka-compatible)	Accepted	2026-04-25
ADR-0007	Double-entry invariant enforced at DB level	Accepted (amended by ADR-0012)	2026-04-25
ADR-0008	JSON DSL for decision engine rules	Accepted	2026-04-25
ADR-0009	BSL chosen over AGPL: rationale	Accepted	2026-04-25
ADR-0010	Prefixed ULID identifiers at the API edge	Accepted	2026-05-30
ADR-0011	Account balance as an incremental row, not a per-post materialized view	Accepted	2026-05-30
ADR-0012	Single-currency transactions, FX via linked legs	Accepted	2026-06-01

Process

• Proposed → discussion in PR
• Accepted → merged, immutable
• Deprecated → replaced by another ADR (link forward)
• Superseded → see linked successor

See ADR-Process for the full workflow.