Tags matching `vX.Y.Z-*` (e.g. v3.4.0-rc1, v1.0.0-beta.2) are treated as
internal/staging builds. They skip the tag-vs-manifest check because
pre-releases do not flow to end users via `/plugin update`, which reads
the manifest on the default branch.
Stable tags `vX.Y.Z` still require all five version sources to match
exactly, so the protection against the #874 drift remains intact. The
cross-file consistency check on PRs is unchanged — all manifests must
still agree with mempalace/version.py whenever any version file moves.
Fails a tag push if `vX.Y.Z` does not match `mempalace/version.py` (the
single source of truth per CLAUDE.md), and fails PRs that touch any
version file without keeping all five in sync (pyproject.toml,
version.py, .claude-plugin/marketplace.json, .claude-plugin/plugin.json,
.codex-plugin/plugin.json).
Prevents the class of bug described in #874, where v3.1.0/v3.2.0/v3.3.0
tags all landed pointing at commits that still carried manifest version
3.0.14, blocking `/plugin update` for end users.
Refs #874
Igor Lins e Silva