Documentation is versioned by the public CoreLink contract boundary, not by website deployment or repository release cadence. A documentation version remains Alpha while its referenced public contract/runtime/tool surfaces remain draft/prerelease.

Breaking public-contract changes require a new major documentation tree and migration guidance. Compatible additions may extend the same tree only when contract compatibility policy permits them.

Every version landing page records:

• exact contract version/tag or immutable revision;
• supported resource surface;
• runtime/SDK/tool maturity;
• known omissions and contract-gated sections;
• compatibility and maturity references;
• operational/error/troubleshooting guidance appropriate to that boundary.

Do not silently rewrite older version guidance to match a newer incompatible contract.