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name: adr-format-alexandrian description: This skill should be used when the user asks about "Alexandrian format", "Alexandrian ADR", "pattern-based ADR", "forces-based ADR", "Christopher Alexander ADR", or needs guidance on creating ADRs using the Alexandrian pattern format.

Alexandrian ADR Format

The Alexandrian format is inspired by Christopher Alexander's pattern language. It emphasizes the forces influencing decisions and the resulting context after applying a solution.

About Alexandrian Format

The Alexandrian format is:

• Pattern-oriented - Follows pattern language structure
• Force-focused - Emphasizes competing forces
• Context-rich - Detailed before/after context
• Relationship-aware - Links to related patterns/decisions

Template Structure

# {NUMBER}. {TITLE}

Date: {DATE}

## Status

{STATUS}

## Context

{Background and current state}

## Problem

{Clear problem statement}

## Forces

* {Force 1}
* {Force 2}
* {Force 3}

## Solution

{Chosen solution}

## Resulting Context

### Benefits
* {Benefit 1}
* {Benefit 2}

### Drawbacks
* {Drawback 1}
* {Drawback 2}

### Related Patterns/Decisions
* {Related ADR or pattern}

Section Guide

Context

Describe the background:

• Project state
• Team composition
• Organizational factors
• Technical environment

Problem

State the problem clearly:

• What issue needs resolution?
• What question needs answering?
• Frame as a specific challenge

Forces

List forces influencing the decision:

• Technical requirements
• Business constraints
• Team factors
• Organizational pressures

Forces often pull in different directions, creating tension that the decision must resolve.

Example:

## Forces

* Need for high availability (99.99% uptime SLA)
* Limited budget ($5K/month infrastructure)
* Team expertise in Kubernetes
* Requirement for data residency in EU
* Desire to minimize operational overhead

Solution

Describe the chosen solution:

• What will be done
• How it addresses the forces
• Specific implementation approach

Resulting Context

Document the state after applying the solution:

Benefits - Positive outcomes achieved Drawbacks - Negative consequences accepted Related Patterns/Decisions - Connections to other ADRs or architectural patterns

When to Use Alexandrian Format

Best for:

• Decisions with complex, competing forces
• Pattern-oriented teams
• Decisions requiring detailed context
• Situations with many constraints

Consider other formats when:

• Quick documentation needed
• Forces are straightforward
• Team prefers simpler templates

Alexandrian Best Practices

Documenting Forces

• List 4-8 forces for most decisions
• Include both technical and non-technical forces
• Note which forces are in tension
• Prioritize or weight forces if helpful

Resulting Context

• Be honest about drawbacks
• Link to decisions that address drawbacks
• Note conditions that would trigger revisiting

Additional Resources

Templates

Template available at: ${CLAUDE_PLUGIN_ROOT}/templates/alexandrian/adr-template.md

External Resources

• "A Pattern Language" by Christopher Alexander
• Pattern-Oriented Software Architecture