[mcmire]

We want to upgrade @metamask/auto-changelog, but 7.0.0 of this package is ESM-only and exclusively exports types via exports. exports are not supported by TypeScript's node module resolution strategy, so this commit updates tsconfig.json to use Node16 instead.

That change forced three other changes:

• We've enabled skipLibCheck, as @metamask/superstruct starts producing type errors otherwise.
• We've renamed changelog-check.ts to changelog-check.mts, because TypeScript now sees execa as an ESM-only module, and to be able import ESM-only modules, we need the file to be interpreted as ESM.
• We've updated the ESLint and depcheck configurations to support .mts files.

Manual testing steps

• Try running yarn changelog:check. It should not fail to run (although it will produce an error, because expected arguments are missing).

---

Note

Low Risk
Mostly compiler and lint/tooling config; the main runtime behavior change is how changelog:check is launched as ESM.

Overview
Switches TypeScript to Node16 for module and moduleResolution so dependencies that expose types only via package.json exports (e.g. future ESM-only @metamask/auto-changelog) resolve correctly. skipLibCheck is turned on to avoid new lib-check failures from @metamask/superstruct.

The changelog validation entrypoint is moved to an ESM .mts file and yarn changelog:check now runs it with node --loader ts-node/esm instead of plain ts-node, so ESM-only imports like execa type-check under the new resolution. ESLint, depcheck, and the lint:eslint script are extended to treat .mts like other TypeScript/module sources.

Jest global coverage thresholds are raised to match current measured coverage (typical jest-it-up outcome after tests).

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[mcmire]

This causes yarn changelog:check to produce a warning that --loader is experimental. It may or may not work in future versions of Node.

If we can upgrade Node then we may be able to take advantage of Node's type-stripping feature and then we can drop ts-node entirely:

    "changelog:check": "node src/changelog-check.mts",

But maybe this is okay for now?

[HowardBraham]

Yes, it would be nice to drop ts-node. We dropped it in the Extension.

[mcmire]

I'm not sure why these went up 🤷🏻 But I'll take it!

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