Architecture Decision Records (ADRs): How High-Performing Teams Stay Aligned

Code shows what you built. Architecture Decision Records (ADRs) capture why. Without them, every new senior hire re-litigates settled choices, and every incident postmortem discovers “we think we chose Kafka because…”. ADRs are cheap alignment infrastructure for software businesses.

What belongs in an ADR

• Context and problem forces
• Decision (clear, one sentence)
• Options considered (including “do nothing”)
• Consequences—positive and negative
• Status: proposed, accepted, superseded, deprecated

Keep each ADR small. One decision per file. Markdown in the repo next to the code beats a wiki graveyard.

Lightweight template

# ADR-0017: Use modular monolith for billing domain

## Status
Accepted — 2026-03-12

## Context
Billing has three engineers; compliance needs audit trails; traffic is moderate.

## Decision
Keep billing as a module inside the core deployable with clear package boundaries.

## Consequences
+ Faster iteration, single transaction model
− Future extract will require anti-corruption layer

When to write an ADR

• Choosing a data store, queue, or auth approach
• Public API versioning strategy
• Multi-tenancy model (row-level vs DB-per-tenant)
• Build vs buy for a platform capability
• Significant security or compliance trade-offs

Do not ADR every function rename. Decision significance ≈ cost of being wrong × difficulty of reversing.

Team process that works

1. Author drafts ADR in a PR with prototype links if needed
2. Asynchronous review 48 hours for non-urgent decisions
3. Tech lead or architecture guild accepts
4. Superseding ADRs reference the old number—never silently rewrite history

ADRs and software business strategy

Investors and enterprise buyers increasingly ask about engineering maturity. A living ADR log shows governance without bureaucracy. It also protects delivery velocity: fewer circular debates in sprint planning.

Common failure modes

• Writing novels nobody reads
• ADRs only after the decision is irreversible
• No link from code modules to relevant ADRs
• Status never updated when reality changes

Frequently asked questions

ADRs vs design docs?

Design docs explore a large problem. ADRs freeze a decision. Use both: design doc → one or more ADRs.

Where should ADRs live?

In git with the service or monorepo that owns the decision. Cross-cutting ADRs can live in a platform repo.

How can Auroviq help?

We introduce ADR practice during architecture engagements and leave your team with a working log and review habit.