Add an architecture decision record directory

.adr-dir

@@ -0,0 +1 @@
+docs/adr

docs/adr/0001-record-architecture-decisions.md

@@ -0,0 +1,19 @@
+# 1. Record architecture decisions
+
+Date: 2018-03-12
+
+## Status
+
+Accepted
+
+## Context
+
+We need to record the architectural decisions made on this project.
+
+## Decision
+
+We will use Architecture Decision Records, as described by Michael Nygard in this article: http://thinkrelevance.com/blog/2011/11/15/documenting-architecture-decisions
+
+## Consequences
+
+See Michael Nygard's article, linked above. For a lightweight ADR toolset, see Nat Pryce's _adr-tools_ at https://github.com/npryce/adr-tools.