Bun 1.3.14 stopped exposing `--compile` extras through every filesystem-style API: `fs.existsSync`, `Bun.file().exists()`, `Bun.resolveSync`, and `await import()` on `/$bunfs/...` or `file:///$bunfs/...` all fail; only `/$bunfs/root/<binary-name>` itself answers. The pre-existing legacy-pi rewrite emitted `file:///$bunfs/...` URLs that Bun then could not load, so every legacy extension that imported `@oh-my-pi/pi-*` or `@sinclair/typebox` failed on the `omp-darwin-arm64` release binary.
`legacy-pi-compat.ts` now keeps a JS-heap reference to every bundled pi-* surface in a lazy-loaded sibling `legacy-pi-bundled-registry.ts` and serves them through an `omp-legacy-pi-bundled:` virtual namespace whose `Bun.plugin().onLoad` synthesizes a re-export module — no bunfs path ever leaves the module in compiled mode. Dev / source-link / installed-package modes keep the historical `file://` rewrite (source files exist on disk). The matching `--compile` extras in `scripts/build-binary.ts` are gone; `BUNFS_PACKAGE_ROOT`, `bunfsPath`, `__computeBunfsPackageRoot`, and `__joinBunfsPath` are deleted as dead code. `scripts/smoke-3423.ts` compiles a tiny binary that loads a fixture extension end-to-end through the new path.
Fixes#3423
roboomp
294d41bd3b