v1.0.3

• Changed EPUB merge ordering to use the listed input order by default, with --sort and the sort API option available for natural filename ordering.
• Added validation for conflicting merge order options and kept --preserve-order as a compatibility no-op because preserving input order is now the default.
• Added detailed help output for the merge, meta, info, unpack, and cover CLI subcommands.
• Documented merge ordering, sorted merges, merge label prefix/suffix flags, and epub cover set -o output usage.
• Hardened the npm release workflow with manual tag creation, tag/package/lockfile/changelog checks, changelog-derived release notes, draft GitHub release handling, and npm republish detection.

v1.0.1

SEO and discoverability

• Expanded npm keywords for EPUB CLI, parser, metadata, merge, cover, OPF, JavaScript, Node.js, and TypeScript searches.
• Updated the npm package description to call out merging EPUB files explicitly.
• Added CHANGELOG, CONTRIBUTING, and SECURITY docs for repository trust and indexed project guidance.
• Added a GitHub social preview asset at .github/social-preview.png.

Runtime behavior

• No runtime API, CLI behavior, or exported TypeScript types changed in this release.

Verification

• npm run lint
• npm test
• npm --cache /private/tmp/epubkit-npm-cache pack --dry-run