REL — PUMA follows semantic versioning

PUMA follows semantic versioning: v3.0.0 (2026-05-20) is the released baseline, v3.1.0 (2026-05-25) reconciled artifacts and completed the puma community CLI subgroup, v4.0.0 (2026-05-31) shipped the publication pipeline and security audit.

Source: puma docs/RELEASES/v3.1.0.md; pyproject.toml · Traceability: corpus unit PUMA-050 · Confidence: repo-backed