How-To2026-08-289 min read

How to Create Architecture Decision Records in Notion

Architecture Decision Records (ADRs) are short documents that capture significant technical decisions, the context that drove them, the alternatives considered, and the consequences of the chosen approach. Without ADRs, technical decisions live only in the heads of senior engineers — when those engineers leave, the organization cannot understand why the system is built the way it is.

This guide covers how to build an ADR system in Notion that is lightweight enough to actually be used and structured enough to be searchable months later.

Step-by-step guide

01

Create an ADR database in Notion

Create a full-page Notion database called "Architecture Decision Records." Add properties: ADR Number (number — auto-increment manually starting at ADR-001), Status (select: Proposed, Accepted, Deprecated, Superseded), Decision Date (date), Component (multi-select for system areas: auth, data-layer, API, frontend, infrastructure), Deciders (person — who had final say), and Superseded By (relation to another ADR for deprecated decisions).

02

Build the ADR template

Create a database template with these sections: Title (H1, format "ADR-NNN: Short Decision Title"), Status and Date (H2, include current status), Context (H2 — what situation or constraint is forcing this decision?), Decision (H2 — what was decided, stated clearly in one sentence), Alternatives Considered (H2 — bulleted list of 2-4 alternatives with one-sentence pros and cons for each), Consequences (H2 — both positive and negative consequences of the decision), and Related ADRs (H2 — links to prior decisions this one builds on or contradicts).

03

Write the Context section rigorously

The Context section is the most important part of an ADR. Describe the technical and business constraints driving the decision: current system state, performance requirements, team skill set, budget constraints, timeline pressure, existing dependencies. Future engineers reading this ADR need to understand why this decision made sense at the time, even if it looks questionable in hindsight.

04

Document alternatives honestly

The Alternatives Considered section loses value if it is written after the decision as justification. Write alternatives before the decision is final: list each option, its genuine advantages, and its genuine disadvantages. Include the "do nothing" option. An ADR that lists only one alternative and one "rejected" option is not an honest record — it is a post-hoc justification.

05

Link ADRs to related PRDs and tickets

In the Related ADRs section, add links to the PRDs and project context that drove the decision. If ADR-007 (choosing PostgreSQL over MongoDB) was driven by a specific project's requirements, link to that project's PRD. This bidirectional traceability means future engineers can navigate from a technical decision back to the product context that shaped it.

Common mistakes

ADRs that are too long

An ADR longer than one page is a design document, not a decision record. ADRs should be scannable in 3-5 minutes. If you need more than a page to explain the context and decision, the decision might not be atomic enough — consider splitting into multiple ADRs.

Not updating ADR status when decisions are reversed

An ADR without status management creates confusion. When a decision is reversed or superseded, update the original ADR status to "Superseded" and add a link to the new ADR. Without this, engineers find contradictory ADRs and cannot tell which is current.

Writing ADRs only for large architectural decisions

ADRs are most valuable for medium-sized decisions that would otherwise be undocumented: choosing a library over another, deciding on an API versioning strategy, picking a caching pattern. Major decisions get documented in design docs. Small decisions are too frequent to record. ADRs fill the gap for the decisions in between.

Tips

Number ADRs sequentially and never reuse numbers — even deprecated ADRs keep their number so external references (Slack messages, PRs) never break

Create a Notion gallery view of your ADR database filtered to Status = Accepted, sorted by Component — it becomes a browsable map of your active architecture decisions

Add ADR review to your engineering onboarding checklist — reading the last 20-30 ADRs gives new engineers a tour of the system's evolution faster than any architecture diagram

How Vantage helps

ADRs capture technical decisions. Vantage connects those decisions to the product context that drove them: when an ADR references a performance requirement or a compliance constraint, Vantage can surface the PRD and requirements that established those constraints. This gives engineers navigating the ADR library the full product context without hunting across Notion pages.

Frequently asked questions

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