Spawn keeps caller-owned extra fds open (
890ef5a)
Passing a raw fd in stdio[N] now preserves ownership with the caller instead of letting Bun.spawn close it during subprocess finalization. This fixes fd reuse bugs after GC and updates the type surface/tests to reflect that extra stdio slots can be null when the fd isn't owned by Bun.
Auto-install fixes a dangling dependency pointer (
7a4e667)
The runtime auto-install path now copies dependency records to the stack before enqueueing work that can grow the lockfile buffer. That avoids reading freed/reallocated memory when a cached manifest triggers Lockfile.Package.fromNPM, closing a fuzz-found use-after-poison in package install resolution.
Windows build gets PCH and unified C++ compilation (
3453c22, 
2cf54bf, f344121)
The build system adds WebKit-style unified C++ wrappers plus expanded precompiled headers, cutting translation units and speeding up C++ builds substantially. Windows now uses clang-cl-compatible PCH wiring, and one source is kept out of unification to preserve fs.constants parity on Windows.
POSIX builds stop compiling libuv unnecessarily (dd6f468)
Vendored libuv is now Windows-only at build time; POSIX uses Bun's stubs/polyfills instead. This removes a redundant dependency build and link step from Unix builds without changing runtime behavior.
Other misc changes
- More test files converted to concurrent/batched execution to reduce wall-clock time.
- Build script docs/configuration updated for unified sources and PCH changes.
- Spawn type/test coverage adjusted for extra stdio and IPC edge cases.