v0.1.0-next.23

Released: 2026-06-01

Adds opt-in bundle.mainFields / bundle.external knobs for the page/SSR (--platform=neutral) bundler, so a project can resolve (or externalize) a CJS-main-only dependency without excluding the importing file.

Features

feat(bundler): add bundle.mainFields / bundle.external knobs for the page/SSR pass — under --platform=neutral esbuild’s main-fields list is empty, so a dep resolved only via package.json main/module (no exports map, e.g. msw → path-to-regexp@6) fails to resolve. bundle.mainFields sets esbuild --main-fields for every framework (previously a React-only main,module shim); bundle.external appends --external specifiers. Both are opt-in and threaded through zfb build and zfb dev; unset → byte-identical to before (#676) (5c434e1)

Other Changes

test(bundler): cover bundle.mainFields / bundle.external resolution with fail-without / pass-with negative-control integration tests (#676) (6a3ffa5)
fix(bundler): correct main_fields field placement in existing BundlerInput test literals (#676) (01a6a84)