v3.0.0 — The masterpiece milestone: full grid, doubled skills, review-ready JOSE paper

Major release closing the v3.0 arc. Twenty-one bilingual booklets with at least one in every one of the twelve categories, twenty companion skills with machine-enforced bilingual parity, 354 verified citation declarations with zero fabricated, and a Journal of Open Source Education paper refreshed to this finished surface.

Added

• A fifth distinctive contribution in the paper: the anti-AI-trace revision method, grounded in DOI-verified evidence that detection tools are unreliable (Weber-Wulff et al., 2023) and biased against non-native English writers (Liang et al., 2023), with the disclosure-over-detectability position stated explicitly.
• meta/jose-submission.md, the JOSE readiness checklist. The dual-license question is documented as an open maintainer decision; the submission itself is maintainer-gated and not performed by this release.
• A draft-pdf.yml workflow compiling the paper with the official Open Journals action.

Changed

• paper/paper.md moved from the v2.2.0 narrative to the v3.0.0 surface, with the quality-control section matched to current CI (validator with skill schema, markdownlint, pytest on 3.9/3.12, cff-validator, gitleaks).

Unchanged

• No booklet, citation, or skill content changed. Aggregate metrics: 354 verified declarations, 0 fabricated, 21 booklets at release status.

Full notes in CHANGELOG.md.