docs(style): enforce clickable links for Markdown references

- Add COMMON/docs-style.md with linking rule
- Convert plain Markdown file references to relative links across docs

COMMON/README.md

@@ -5,9 +5,9 @@ Purpose
 - Opinionated but adaptable; intended as a base layer.
 
 Contents (initial)
-- Git workflow (branching, merges, commit style)
-- CI/bootstrap parity guidance
+- Git workflow: [COMMON/git-workflow.md](git-workflow.md)
+- CI/bootstrap parity: [COMMON/bootstrap-cicd.md](bootstrap-cicd.md)
+- Documentation style: [COMMON/docs-style.md](docs-style.md)
 
 Notes
 - Keep content generic and reusable; project-specific overrides should live in the target repo.
-

COMMON/docs-style.md

@@ -0,0 +1,8 @@
+Documentation Style Guide
+
+- When referencing another Markdown file in this repo, use a relative link so it is clickable in Gitea. Example: [COMMON/git-workflow.md](COMMON/git-workflow.md).
+- Keep titles concise and descriptive; use sentence case unless a proper noun.
+- Prefer short bullets (one point per line). Merge related points.
+- Use backticks for commands, file paths, env vars, and code identifiers.
+- Make documents actionable: lead with outcomes, then steps, then background.
+