diff --git a/src/content/docs/changelog.mdx b/src/content/docs/changelog.mdx
index 793f531..2c88113 100644
--- a/src/content/docs/changelog.mdx
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@@ -11,6 +11,10 @@ This page is updated automatically each night when new content is added to the g
 
 {/* ENTRIES_START */}
 
+## 2026-08-06
+
+**Spec-Driven Development** — New guide on defining, managing, and enforcing solution spaces for AI agents with structured requirements, acceptance scenarios, and contracts.
+
 ## 2026-07-13
 
 **Designing Loops** — added concrete example of `/goal` command for supervised loops with PR submission workflow.