Git installs now run on the install thread loop (
22f5249)
bun install no longer shells out to git from shared thread-pool workers, which fixes Ctrl-C/signal routing issues during overlapping clones. The change also restructures package-manager task tracking so git work is queued and accounted for explicitly.
Runtime transpiler cache now keys on defines and --drop (9439a24)
The runtime transpiler cache now includes the define table and drop settings in its cache key, preventing stale transformed output from being reused across projects or config changes. This closes a correctness hole where identical source bytes could produce the wrong runtime behavior on first run.
TypeScript resolver covers more rewrite cases (56efde1)
The resolver now fixes several gaps in TypeScript extension rewriting, including .cjs → .cts, exact exports/imports targets that need extension probing, and type-only tsconfig paths. This unblocks real-world Node16/CommonJS layouts and brings Bun’s resolution closer to tsc/esbuild behavior.
Fetch unix-socket pooling is anchored to the current cwd (16a3012)
Relative AF_UNIX socket paths are now resolved at call time against the active working directory, so connection reuse can’t accidentally hop between different sockets after process.chdir(). That fixes pooled fetches silently talking to the wrong server.
Shell pipelines are initialized safely before children start (35772be)
Pipeline setup was reworked so every child is prepared before any command begins running, preventing use-after-free and panic scenarios when an early pipe or dup fails mid-pipeline. This makes shell failures deterministic instead of crashing later in the event loop.
WebView reuses one WKProcessPool across views (af0d89d)
All WebKit-backed Bun.WebView instances now share a single process pool, removing the 64-instance cliff where new navigations would hang and helper processes would accumulate. This fixes a deterministic lifecycle bug in long-lived processes.
DNS and server binding reject invalid hostnames earlier (b5d0bbc, c64fa10)
Hostname validation now happens before hitting any resolver, avoiding synchronous getaddrinfo calls for strings that can never be hostnames and returning more accurate DNS-style errors. This also improves Bun.serve, Bun.listen, and UDP socket behavior for invalid names.
Child stdin write errors now match Node’s syscall reporting (118fdd2)
Failed writes to child stdin now report syscall: "write" instead of "send", matching Node’s observable behavior. That makes EPIPE/stream error handling more portable for users relying on Node-compatible diagnostics.
fetch/parser/runtime cache race and backtracking fixes (5fadf8a, 54fd211, c03b038, 
0cd5015, 8ace5cd)
Several correctness bugs were fixed in parser backtracking and fetch/body handling, including preserving legal comments across speculative arrow parsing and deflaking a few fragile fetch/stream tests. These are smaller but still user-visible correctness fixes around edge cases.
Other misc changes
- Dependency / tooling / test-only updates across bun:test, bun-types, process.versions, glob, SQL roots, child process, and install tests
- Reverts and internal cleanup in the transpiler cache and dead FFI / HTTP2 glue code
- Test deflakes and concurrency speedups in fetch, shell, install, DNS, and bytecode suites