docs(agents): point to CI6 before raising a dependency floor (#105)

* docs(agents): point to CI6 before raising a dependency floor

* docs(agents): spell out the floors check instead of linking CI6

* docs(agents): shorten the floors check

Author: lesnik512

AGENTS.md

@@ -44,6 +44,10 @@ Every link in `README.md` must be absolute: `https://github.com/modern-python/<r
 or `.../tree/main/<path>` for a directory. Never a relative path: `README.md` is also the PyPI long
 description, and PyPI does not rewrite relative links, so a relative one 404s on the package page.
 
+Before pushing a raised dependency floor, run the `floors` steps from
+[`_checks.yml`](.github/workflows/_checks.yml) locally. If resolution fails, raise the direct floor
+it names.
+
 ## Agent skills
 
 ### Issue tracker