Commit guideline copies with projects and allow single-number versioning

Project template/CHANGELOG.md

@@ -12,9 +12,21 @@ Each version entry uses these sections (include only those that apply):
 - **Removed** — removed features
 - **Dependencies** — added, updated, or removed dependencies
 
+## Versioning
+
+Which scheme applies depends on what the repository ships:
+
+- **Software projects — semantic versioning** `MAJOR.MINOR.PATCH`. The project manifest
+  (`pyproject.toml`, `Cargo.toml`, `project.godot`) is the source of truth, and this file is updated
+  **before** the version there is bumped.
+- **Documentation and other non-program projects — single-number revisions** `v1`, `v2`, …
+  A repository with no manifest has nothing to derive a semantic version from, and
+  MAJOR/MINOR/PATCH carries no meaning for prose. Increment by one per released revision.
+
+Pick one scheme per repository and do not mix them in this file.
+
 ## Rules
 
-- Follow semantic versioning: `MAJOR.MINOR.PATCH`
 - Newest version goes at the top
-- Always update this file before bumping the version in the project manifest (`pyproject.toml`, `Cargo.toml`, `project.godot`)
 - Document changes as they are made, not all at once at release time
+- Always ask before bumping the version — never increment automatically