ai(rules[AGENTS]): Align doctest section title for consistency

tony · tony · commit 67cea46b1f20 · 2025-12-30T08:56:17.000-06:00
why: Ensure consistent section naming across all projects
what:
- Rename "Doctest Guidelines" to "Doctests" to match libvcs standard
diff --git a/AGENTS.md b/AGENTS.md
@@ -224,7 +224,7 @@ type
 """
 ```
 
-### Doctest Guidelines
+### Doctests
 
 **All functions and methods MUST have working doctests.** Doctests serve as both documentation and tests.
 
