Node 18 end of life — check package metadata before publishing

Checks package.json before npm publish: engines.node floors that still admit end-of-life Node 18/20, volta and @types/node pins, non-SPDX licence values, and repository/provenance blockers. Runs entirely in your browser — nothing is uploaded.

as of

Free here: Lists every line in package.json that still pins an end-of-life Node line or blocks npm publish --provenance, with the exact replacement line for each.. In the editor: A dated release report (Markdown) of every finding and its fix line, saved for the release ticket or audit file. — that part asks for a licence key.

Same engine as the VS Code extension, byte for byte.