Add AI documentation skills

.ai/skills/mkdocs/references/README.md

@@ -0,0 +1,21 @@
+# MkDocs Skill References
+
+This skill vendors official documentation from the tagged upstream source trees for:
+
+- `mkdocs==1.6.1`
+- `mkdocs-material==9.7.1`
+
+Included files:
+
+- `upstream/mkdocs-1.6.1-docs/`
+- `upstream/mkdocs-1.6.1-mkdocs.yml`
+- `upstream/mkdocs-material-9.7.1-docs/`
+- `upstream/mkdocs-material-9.7.1-mkdocs.yml`
+- `upstream/mkdocs-material-9.7.1-schema.json`
+
+Source bundles used:
+
+- `https://codeload.github.com/mkdocs/mkdocs/tar.gz/refs/tags/1.6.1`
+- `https://codeload.github.com/squidfunk/mkdocs-material/tar.gz/refs/tags/9.7.1`
+
+Use the reference files directly for version-specific details. Keep `SKILL.md` procedural and concise.