ADR

Architecture Decision Records

This directory contains the Architecture Decision Records (ADRs) for this project.

Format

Each ADR follows this structure:

# NNNN: Title

**Status**: Proposed | Accepted | Superseded | Deprecated
**Date**: YYYY-MM-DD

## Context       — What is the issue motivating this decision?
## Candidates    — Options considered with trade-offs
## Decision      — What we chose and why
## Consequences  — What becomes easier/harder
## Constitution Compliance — Mapping to project principles

Numbering Convention

ADRs are numbered sequentially: 0001, 0002, etc. Numbers are never reused. If a decision is reversed, the original ADR is marked "Superseded" and a new ADR is created with a reference.

Index

ADR	Title	Status
0001	Hexagonal Architecture (Ports and Adapters)	Accepted
0002	Zig Language Choice	Accepted
0003	System OpenSSL for Server-Side TLS	Accepted
0004	OpenTelemetry SDK Dependency for Instrumentation	Accepted
0005	AMQP Runner Design	Accepted
0006	Redis Runner Design	Accepted

Creating a New ADR

1. Find the next number: ls docs/ADR/ | grep -oP '^\d+' | sort -n | tail -1 + 1
2. Copy the template: cp docs/ADR/.template.md docs/ADR/NNNN-short-name.md
3. Fill in all sections
4. Update this index
5. Submit for review

Pre-Merge Checklist

Before merging any new or modified ADR:

• Cross-references: All [ADR-NNNN] links resolve to existing files
• Supersession: If changing a prior decision, both ADRs have Supersedes/Superseded by metadata
• Constitution: Compliance section maps to current constitution version
• Candidates: At least 2 alternatives documented with trade-offs