diff --git a/.agents/rules/lockfiles.md b/.agents/rules/lockfiles.md
index 2df03a2..1f17e58 100644
--- a/.agents/rules/lockfiles.md
+++ b/.agents/rules/lockfiles.md
@@ -1,7 +1,12 @@
 ---
 trigger: glob
 description: Rules for updating uv.lock and requirements.txt files
-globs: "*requirements*.txt,*requirements*.in,uv.lock,pyproject.toml"
+globs:
+  - "*requirements*.txt"
+  - "*requirements*.in"
+  - "uv.lock"
+  - "pyproject.toml"
+  - "*constraints*.txt"
 ---
 
 # Lockfile & Dependency Rules
@@ -25,3 +30,5 @@
   entries in `examples/bzlmod/patches/*.patch`.
 * **Test Assertions**: Update hardcoded versions and `dist-info` file lists in
   tests (`pip_whl_mods_test.py`, `pip_parse/test.py`, `pip_parse_test.py`).
+* **Constraints**: Update conflicting pins in `*constraints*.txt` and rerun
+  affected `.update` targets.