From c1414518bbe38ad696a90d746327463ac31b5f38 Mon Sep 17 00:00:00 2001
From: JP Hastings-Spital <jp@byjp.me>
Date: Sat, 27 Jun 2026 22:31:26 +0200
Subject: [PATCH] Describe the conformsTo requirement

---
 web/src/pages/docs/specs/physical-books.astro | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/web/src/pages/docs/specs/physical-books.astro b/web/src/pages/docs/specs/physical-books.astro
index 67777d3..fd44eba 100644
--- a/web/src/pages/docs/specs/physical-books.astro
+++ b/web/src/pages/docs/specs/physical-books.astro
@@ -97,6 +97,22 @@ const examples = [
 					</section>
 
 					<section>
+						<h2
+							class="font-display font-bold text-xl text-surface-900 dark:text-white tracking-tight mb-3"
+						>
+							Conforms To
+						</h2>
+
+						<p class="mb-4">
+							For the spec below to apply the <kbd
+								class="rounded bg-surface-100 dark:bg-surface-700/60 px-1.5 py-0.5 font-mono text-[13px] text-surface-800 dark:text-surface-200"
+								>conformsTo</kbd
+							> value <em>must</em> be exactly <kbd
+								class="rounded bg-surface-100 dark:bg-surface-700/60 px-1.5 py-0.5 font-mono text-[13px] text-surface-800 dark:text-surface-200"
+								>{SPEC_URL}</kbd
+							>.
+						</p>
+
 						<h2
 							class="font-display font-bold text-xl text-surface-900 dark:text-white tracking-tight mb-3"
 						>
-- 
2.51.2