Tyler Slaton fcac2e9911 fix(build): add types condition to package.json exports maps (#3324) ...

Under moduleResolution bundler/node16/nodenext, TypeScript ignores the
top-level "types" field once an "exports" map exists, so strict-exports
tooling (e.g. the Backstage CLI) resolves no type declarations and reports
every named export as "has no exported member". tsdown does not emit a
types condition in the exports map it generates.

Add one — first, per import/require, ESM to .d.mts and CJS to .d.cts — via
a shared withTypesConditions helper (scripts/tsdown-exports.ts) wired into
each tsdown config, and directly in the hand-maintained react-native map.

Add a regression guard, since attw and publint do NOT catch this (TS's
adjacent-file fallback masks it): scripts/validate-package-exports-types.ts,
unit + all-package tests, a validate:exports npm script, and a CI workflow
that fail if any publishable package's exports map lacks a types condition.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-07-09 20:38:10 -07:00

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