diff --git a/README.md b/README.md
index ae4d1c4..a822b6e 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,12 @@ Two separate CashPro APIs are used, each with its own OAuth credentials:
 - Production: `https://api.bofa.com`
 - Sandbox: `https://api-sb.bofa.com`
 
+## Documentation
+
+The canonical map of Sea Haven's AWS infrastructure lives in Confluence. This project's `payments-dashboard` stack is represented there as a Mermaid subgraph.
+
+- **[AWS Architecture Map](https://seahaven.atlassian.net/wiki/spaces/IT/pages/1540098)** (Confluence, IT space, page 1540098)
+
 ## Secrets
 
 All BoA and Slack credentials are stored in AWS Secrets Manager (per `engineering-handbook/secrets-and-config.md`). The Slack token is a plaintext secret; the two BoA secrets are JSON grouping each API's credentials: