diff --git a/pyproject.toml b/pyproject.toml
index ce9f806d0..7d2dd62ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,8 @@ dependencies = [
     "networkx>=3.4",
     "numpy>=1.21",
     "rapidfuzz>=3.0",
+    # Structural YAML extraction (#2214) plus manifest/markdown config parsing.
+    "pyyaml>=6.0",
     "tomli>=2.0.1; python_version < '3.11'",
     # Runtime floor is 0.25, not 0.23: 0.23/0.24 cap out at ABI 14
     # (LANGUAGE_VERSION=14) while the grammars pinned below ship ABI 15