ADR Writer

Purpose

Create Architecture Decision Records (ADRs) whenever:

• A trade-off exists
• Multiple viable options exist
• A choice impacts future development

This skill makes decisions explicit, documented, and reviewable.

When to Use

• Plan Lead or user identifies a design trade-off
• Deciding: architecture patterns, storage, auth, inter-service communication, CI/CD, observability, data consistency

Do NOT use ADRs for trivial choices.

Output Files

• spec/90-decisions/ADR-XXXX-.md

Rules

1. Every ADR must include at least 2 alternatives.
2. Must explicitly state why alternatives were rejected.
3. Must list consequences (positive + negative).
4. If decision depends on unknowns → mark ADR as PROPOSED not ACCEPTED.
5. Keep ADRs short and actionable.

ADR Statuses

PROPOSED | ACCEPTED | SUPERSEDED | REJECTED

Process

Step 0 — Identify the Decision

Write a 1–2 sentence "decision statement".

Step 1 — Gather Options

List 2–4 realistic alternatives.

Step 2 — Evaluation Criteria

Define what matters: Cost, Complexity, Team familiarity, Performance, Security, Vendor lock-in, Operational burden.

Step 3 — Choose + Justify

Pick one, explain why.

Step 4 — Consequences

List: Immediate consequences, Long-term consequences, Migration impact (if any).

Template

ADR-XXXX — . Status: PROPOSED. Date, Decision owners. Context. Decision. Options Considered (Option A/B with Pros/Cons). Decision Rationale. Consequences (Positive, Negative, Operational, Security/Compliance, Migration). Open Questions (if any).