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Guidance and best practices for architectural decision records (adr).
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To allow incompatible interfaces to work together by wrapping an object in an adapter that translates its interface into one that a client expects. Use when: When integrating a third-party library whose interface doesn't match your application's internal requirements; When you want to standardize multiple different implementations of a service (e.g., different payment gateways); When you need to provide a stable interface while the underlying dependency is subject to change.
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| name | architectural-decision-records-adr |
| description | Guidance and best practices for architectural decision records (adr). |
Use ADRs for decisions that are:
Store records in /docs/adr/ using a sequential naming convention: XXXX-title.md.
# ADR 0005: Use PostgreSQL instead of MongoDB
**Date**: 2024-02-09
**Status**: Accepted
**Deciders**: @team-leads
## Context
Our application requires complex relational queries and ACID compliance for financial transactions. While MongoDB is easier to scale horizontally, the current data model is highly relational.
## Decision
We will use PostgreSQL as our primary database.
## Consequences
- **Positive**: Native support for relational joins, strong consistency, and JSONB for semi-structured data.
- **Negative**: Requires schema migrations; horizontal scaling is more complex than MongoDB.
Treat ADRs like code. Submit a PR, discuss the decision, and once accepted, merge it into the main branch.
Superseded.A chronological history of the project's architecture that allows new team members to understand why certain choices were made.