Release beta 1.0.0 baseline

docs/project-rules.md

@@ -6,9 +6,11 @@ exception.
 
 ## Release Discipline
 
-- Version format is `alpha X.Y.Z.MMDD`.
-- Patch changes increment `Z`; minor version changes require explicit user
-  approval.
+- Version format is `beta X.Y.Z.MMDD` for current beta releases.
+- Python package versions use the matching PEP 440 beta form, such as
+  `X.Y.Zb1+MMDD`.
+- Patch changes increment `Z`; minor, major, or stable-release changes require
+  explicit user approval.
 - A release change must update:
   - `VERSION`;
   - root `pyproject.toml`;