From cd5635cdd7c942a2decee59cf3e9ac37b6739d31 Mon Sep 17 00:00:00 2001
From: Velascat <32967198+Velascat@users.noreply.github.com>
Date: Fri, 8 May 2026 07:01:34 -0400
Subject: [PATCH] =?UTF-8?q?fix:=20address=20DC4=20=E2=80=94=20add=20Archit?=
 =?UTF-8?q?ecture=20section?=
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 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index b0e6fb4..5cadce7 100644
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+++ b/README.md
@@ -57,6 +57,10 @@ ExecutorRuntime).
 
 ---
 
+## Architecture
+
+SwitchBoard is a thin policy boundary: requests come in, a lane is selected from `config/policy.yaml`, and an `ExecutionRequest` envelope routes downstream to the chosen runner. The lane catalog is fixed (see **Execution Lanes** below); cost/quality tradeoffs are config edits, not code changes. Configuration loads from `config/policy.yaml` + environment overlays — see the **Configuration** and **API** sections later for the full surface.
+
 ## Execution Lanes
 
 | Lane | Runner | Auth | Cost |