diff --git a/CLAUDE.md b/CLAUDE.md
index 89807f8b15..a87a61fe03 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -8,7 +8,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 Perry is a native TypeScript compiler written in Rust that compiles TypeScript source code directly to native executables. It uses SWC for TypeScript parsing and LLVM for code generation.
 
-**Current Version:** 0.5.1585
+**Current Version:** 0.5.1586
 
 
 ## TypeScript Parity Status
diff --git a/Cargo.lock b/Cargo.lock
index e5cf6e645d..291201d85d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5623,7 +5623,7 @@ checksum = "fc61f41aef38c94e922057977bcb33bf185ab42242188719991ecfdc0fa1fe6b"
 
 [[package]]
 name = "perry"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
@@ -5687,7 +5687,7 @@ dependencies = [
 
 [[package]]
 name = "perry-api-manifest"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-dispatch",
  "serde",
@@ -5695,7 +5695,7 @@ dependencies = [
 
 [[package]]
 name = "perry-audio-miniaudio"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "cc",
  "libc",
@@ -5704,7 +5704,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "aho-corasick",
  "anyhow",
@@ -5721,7 +5721,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-arkts"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5729,7 +5729,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-glance"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5737,7 +5737,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-js"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-dispatch",
@@ -5746,7 +5746,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-swiftui"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5754,7 +5754,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wasm"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
@@ -5766,7 +5766,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wear-tiles"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5774,7 +5774,7 @@ dependencies = [
 
 [[package]]
 name = "perry-container-compose"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "async-trait",
  "clap",
@@ -5798,14 +5798,14 @@ dependencies = [
 
 [[package]]
 name = "perry-container-e2e"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
 ]
 
 [[package]]
 name = "perry-diagnostics"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "serde",
  "serde_json",
@@ -5813,7 +5813,7 @@ dependencies = [
 
 [[package]]
 name = "perry-dispatch"
-version = "0.5.1585"
+version = "0.5.1586"
 
 [[package]]
 name = "perry-doc-fixture-my-bindings"
@@ -5824,7 +5824,7 @@ dependencies = [
 
 [[package]]
 name = "perry-doc-tests"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "clap",
@@ -5839,7 +5839,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ads"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "block2",
  "objc2",
@@ -5849,7 +5849,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-argon2"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "argon2",
  "perry-ffi",
@@ -5858,7 +5858,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-axios"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "reqwest",
@@ -5867,7 +5867,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-bcrypt"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "bcrypt",
  "perry-ffi",
@@ -5875,7 +5875,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-better-sqlite3"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "rusqlite",
@@ -5883,7 +5883,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cheerio"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "scraper",
@@ -5891,7 +5891,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-commander"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5899,7 +5899,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cron"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "chrono",
  "cron",
@@ -5909,7 +5909,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dayjs"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5917,7 +5917,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-decimal"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "rust_decimal",
@@ -5925,7 +5925,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dotenv"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "serde_json",
@@ -5933,7 +5933,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ethers"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "rand 0.10.2",
@@ -5941,7 +5941,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-events"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5949,14 +5949,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-exponential-backoff"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-fastify"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "bytes",
  "http-body-util",
@@ -5973,7 +5973,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-fetch"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "bytes",
  "lazy_static",
@@ -5986,7 +5986,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-http"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "bytes",
@@ -6018,7 +6018,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ioredis"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -6028,7 +6028,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-jsonwebtoken"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "jsonwebtoken",
@@ -6039,7 +6039,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-lru-cache"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "lru",
  "perry-ffi",
@@ -6048,7 +6048,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-moment"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -6056,7 +6056,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mongodb"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "bson",
  "futures-util",
@@ -6068,7 +6068,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mysql2"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -6080,7 +6080,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nanoid"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "nanoid",
  "perry-ffi",
@@ -6089,7 +6089,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-net"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "bytes",
  "perry-ffi",
@@ -6104,7 +6104,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-node-forge"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "const-oid 0.10.2",
  "der 0.8.2",
@@ -6123,7 +6123,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nodemailer"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "lettre",
  "perry-ffi",
@@ -6133,7 +6133,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-parcel-watcher"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "notify",
  "perry-ffi",
@@ -6145,7 +6145,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pdf"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "printpdf",
@@ -6153,7 +6153,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pg"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "sqlx",
@@ -6162,7 +6162,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-qs"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -6171,7 +6171,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ratelimit"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "governor",
  "perry-ffi",
@@ -6179,7 +6179,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-sharp"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "fast_image_resize",
  "image",
@@ -6190,7 +6190,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-streams"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -6199,7 +6199,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-typescript"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-ffi",
@@ -6219,7 +6219,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-undici"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -6228,7 +6228,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-uuid"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "uuid",
@@ -6236,7 +6236,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-validator"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-ffi",
  "perry-validation",
@@ -6245,7 +6245,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ws"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "futures-util",
  "lazy_static",
@@ -6258,7 +6258,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-zlib"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "brotli",
  "flate2",
@@ -6268,7 +6268,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ffi"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "dashmap 6.2.1",
  "once_cell",
@@ -6278,7 +6278,7 @@ dependencies = [
 
 [[package]]
 name = "perry-hir"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-api-manifest",
@@ -6298,11 +6298,11 @@ dependencies = [
 
 [[package]]
 name = "perry-native-registration"
-version = "0.5.1585"
+version = "0.5.1586"
 
 [[package]]
 name = "perry-parser"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "perry-diagnostics",
@@ -6315,7 +6315,7 @@ dependencies = [
 
 [[package]]
 name = "perry-perex"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perex",
  "regex",
@@ -6323,7 +6323,7 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "ahash",
  "base64 0.22.1",
@@ -6381,14 +6381,14 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime-static"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-runtime",
 ]
 
 [[package]]
 name = "perry-stdlib"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "aes 0.8.4",
  "aes 0.9.1",
@@ -6477,21 +6477,21 @@ dependencies = [
 
 [[package]]
 name = "perry-stdlib-static"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-stdlib",
 ]
 
 [[package]]
 name = "perry-transform"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "perry-hir",
 ]
 
 [[package]]
 name = "perry-ui"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "dirs",
  "perry-ffi",
@@ -6501,7 +6501,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-android"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "jni",
@@ -6516,7 +6516,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-geisterhand"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "rand 0.10.2",
  "serde",
@@ -6526,7 +6526,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-gtk4"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "cairo-rs 0.22.9",
@@ -6549,7 +6549,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-ios"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6566,7 +6566,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-macos"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6583,7 +6583,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-model"
-version = "0.5.1585"
+version = "0.5.1586"
 
 [[package]]
 name = "perry-ui-test"
@@ -6594,11 +6594,11 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-testkit"
-version = "0.5.1585"
+version = "0.5.1586"
 
 [[package]]
 name = "perry-ui-tvos"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6615,7 +6615,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-visionos"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6632,7 +6632,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-watchos"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "block2",
  "libc",
@@ -6646,7 +6646,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "libc",
@@ -6665,7 +6665,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows-winui"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "base64 0.22.1",
  "libc",
@@ -6678,7 +6678,7 @@ dependencies = [
 
 [[package]]
 name = "perry-updater"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
@@ -6693,7 +6693,7 @@ dependencies = [
 
 [[package]]
 name = "perry-validation"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "idna",
  "regex",
@@ -6703,7 +6703,7 @@ dependencies = [
 
 [[package]]
 name = "perry-wasm-host"
-version = "0.5.1585"
+version = "0.5.1586"
 dependencies = [
  "wasmi",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index a9b3a5b729..515f32311e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -338,7 +338,7 @@ codegen-units = 1
 codegen-units = 1
 
 [workspace.package]
-version = "0.5.1585"
+version = "0.5.1586"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/PerryTS/perry"
diff --git a/changelog.d/10368-response-null-body-status.md b/changelog.d/10368-response-null-body-status.md
new file mode 100644
index 0000000000..374e2fbc62
--- /dev/null
+++ b/changelog.d/10368-response-null-body-status.md
@@ -0,0 +1,20 @@
+Fixed `Response.json(value, init)` skipping the `ResponseInit` validation that
+`new Response(body, init)` applies (#10360). Both now share one check, in
+Node's order: status range (`RangeError`), then `statusText` (`TypeError`), then
+the body/null-body-status conflict. So `Response.json({a: 1}, {status: 204})`
+throws Node's `TypeError: Response constructor: Invalid response status code
+204` instead of returning a 204, and `Response.json({}, {status: 600})` throws
+a `RangeError` instead of returning a 600. The fix covers both perry-stdlib and
+perry-ext-fetch.
+
+Programs compiled with `--platform bun` follow Bun instead: a body with a
+null-body status (204/205/304) is accepted by both constructors, so
+`new Response("", {status: 204})` works. The compiler seeds
+`__perry_runtime.setBunPlatform()` into every module's init next to the #9599
+`globalThis.Bun` install, which sets a runtime flag
+(`perry-runtime/src/bun_compat/platform.rs`, `js_set_bun_platform` /
+`js_bun_platform_enabled`) before any dependency's top-level code runs.
+
+Tests: `test-files/test_gap_response_null_body_status_10360.ts` (Node parity)
+and `crates/perry/tests/issue_10360_bun_platform_response_null_body.rs` (Bun
+1.3.14 output under `--platform bun`, plus a node-platform control).
diff --git a/crates/perry-codegen/src/codegen/entry/tests.rs b/crates/perry-codegen/src/codegen/entry/tests.rs
index 3ffab742cd..ba2c5bd511 100644
--- a/crates/perry-codegen/src/codegen/entry/tests.rs
+++ b/crates/perry-codegen/src/codegen/entry/tests.rs
@@ -536,3 +536,26 @@ fn dylib_closures_keep_native_roots() {
         "dylib roots must not be demoted to the shadow stack:\n{closure}"
     );
 }
+
+/// #10360: `--platform bun` seeds `__perry_runtime.setBunPlatform()` into
+/// module init; it must lower to the runtime flag setter, which the fetch
+/// Response paths read to follow Bun's null-body-status leniency.
+#[test]
+fn set_bun_platform_marker_lowers_to_the_runtime_flag_setter() {
+    let mut module = empty_module();
+    module.init = vec![Stmt::Expr(Expr::NativeMethodCall {
+        module: "__perry_runtime".to_string(),
+        class_name: None,
+        object: None,
+        method: "setBunPlatform".to_string(),
+        args: Vec::new(),
+    })];
+    let ir = String::from_utf8(compile_module(&module, entry_opts("executable")).unwrap())
+        .expect("LLVM IR should be UTF-8");
+    assert!(
+        ir.contains("call void @js_set_bun_platform()"),
+        "expected the Bun platform marker call in module init:\n{ir}"
+    );
+    // Control: the default (node) platform never emits the call.
+    assert!(!emitted_ir("executable").contains("call void @js_set_bun_platform"));
+}
diff --git a/crates/perry-codegen/src/lower_call/native/native_runtime_branch.rs b/crates/perry-codegen/src/lower_call/native/native_runtime_branch.rs
index e4df635e5b..c1e5a9a059 100644
--- a/crates/perry-codegen/src/lower_call/native/native_runtime_branch.rs
+++ b/crates/perry-codegen/src/lower_call/native/native_runtime_branch.rs
@@ -173,6 +173,13 @@
                     .block()
                     .call(DOUBLE, "js_has_path_module", &[(DOUBLE, &path)]));
             }
+            // #10360: seeded into every module init under `--platform bun`
+            // so the runtime can follow Bun where its Web APIs differ from
+            // Node's (e.g. the Response null-body-status check).
+            "setBunPlatform" => {
+                ctx.block().call_void("js_set_bun_platform", &[]);
+                return Ok(double_literal(f64::from_bits(crate::nanbox::TAG_UNDEFINED)));
+            }
             _ => {}
         }
     }
diff --git a/crates/perry-codegen/src/runtime_decls/objects.rs b/crates/perry-codegen/src/runtime_decls/objects.rs
index 65602436d0..3f39151452 100644
--- a/crates/perry-codegen/src/runtime_decls/objects.rs
+++ b/crates/perry-codegen/src/runtime_decls/objects.rs
@@ -407,6 +407,8 @@ pub fn declare_phase_b_objects(module: &mut LlModule) {
     module.declare_function("js_run_module_init_catching", VOID, &[I64]);
     module.declare_function("js_require_path_module", DOUBLE, &[DOUBLE]);
     module.declare_function("js_has_path_module", DOUBLE, &[DOUBLE]);
+    // #10360: `--platform bun` marker (see `__perry_runtime.setBunPlatform`).
+    module.declare_function("js_set_bun_platform", VOID, &[]);
     // Next.js wall 54 (part 2): register a Deferred module's `__init` address by
     // path so a runtime `require(absolutePath)` can trigger its lazy init.
     module.declare_function("js_register_path_init", VOID, &[PTR, I64, I64]);
diff --git a/crates/perry-ext-fetch/src/lib.rs b/crates/perry-ext-fetch/src/lib.rs
index e616abd76b..72ed823dbb 100644
--- a/crates/perry-ext-fetch/src/lib.rs
+++ b/crates/perry-ext-fetch/src/lib.rs
@@ -22,8 +22,8 @@ use std::sync::Mutex;
 mod gc;
 mod validation;
 use validation::{
-    is_forbidden_method, is_null_body_status, is_redirect_status, is_valid_status_text,
-    normalize_method, parse_redirect_location, redirect_status_from_value,
+    is_forbidden_method, is_redirect_status, normalize_method, parse_redirect_location,
+    redirect_status_from_value, response_init,
 };
 use validation::{throw_range_error, throw_type_error};
 
@@ -1224,31 +1224,7 @@ pub unsafe extern "C" fn js_response_new(
     let body_opt = read_str(body_ptr);
     let body_present = body_opt.is_some();
     let body = body_opt.unwrap_or_default().into_bytes();
-    // NaN/0.0 are the codegen "no status field" sentinels → default 200.
-    // Otherwise truncate toward zero + range-check 200..=599 (#2640).
-    let status = if status.is_nan() || status == 0.0 {
-        200
-    } else {
-        let truncated = status.trunc();
-        if !(200.0..=599.0).contains(&truncated) {
-            throw_range_error("init[\"status\"] must be in the range of 200 to 599, inclusive.");
-        }
-        truncated as u16
-    };
-    let status_text = match read_str(status_text_ptr) {
-        Some(s) => {
-            if !is_valid_status_text(&s) {
-                throw_type_error("Invalid statusText");
-            }
-            s
-        }
-        None => String::new(),
-    };
-    if body_present && is_null_body_status(status) {
-        throw_type_error(&format!(
-            "Response constructor: Invalid response status code {status}"
-        ));
-    }
+    let (status, status_text) = response_init(status, read_str(status_text_ptr), body_present);
     let headers_id = handle_id(headers_handle);
     let headers = if headers_id != 0 {
         HEADERS_HANDLES
@@ -1419,15 +1395,10 @@ pub unsafe extern "C" fn js_response_static_json(
 ) -> f64 {
     let v = JsValue::from_bits(value.to_bits());
     let body = perry_ffi::json_stringify(v).unwrap_or_default();
-    // #2638: honor `init.status` / `init.statusText` / `init.headers`.
-    let status = if init_status.is_nan() || init_status == 0.0 {
-        200
-    } else {
-        init_status as u16
-    };
-    // Node's `Response.json` leaves statusText "" when not provided — it does
-    // not fall back to the status reason phrase.
-    let status_text = read_str(init_status_text_ptr).unwrap_or_default();
+    // #2638: honor `init.status` / `init.statusText` / `init.headers`, with
+    // the same validation as `new Response` (#10360) — the JSON body is
+    // always present, so a null-body status throws outside Bun mode.
+    let (status, status_text) = response_init(init_status, read_str(init_status_text_ptr), true);
     // Start from any user-provided headers, then add the default content-type
     // only if the init headers didn't already set one.
     let headers_id = handle_id(headers_handle);
diff --git a/crates/perry-ext-fetch/src/validation.rs b/crates/perry-ext-fetch/src/validation.rs
index acccf1eab9..f719a19d34 100644
--- a/crates/perry-ext-fetch/src/validation.rs
+++ b/crates/perry-ext-fetch/src/validation.rs
@@ -18,6 +18,8 @@ extern "C" {
     fn js_typeerror_new(message: *mut StringHeader) -> *mut u8;
     fn js_rangeerror_new(message: *mut StringHeader) -> *mut u8;
     fn js_throw(value: f64) -> !;
+    // perry-runtime `bun_compat::platform` (#10360): 1 under `--platform bun`.
+    fn js_bun_platform_enabled() -> i32;
 }
 
 pub(crate) unsafe fn throw_type_error(msg: &str) -> ! {
@@ -46,6 +48,46 @@ pub(crate) fn is_null_body_status(status: u16) -> bool {
     matches!(status, 101 | 103 | 204 | 205 | 304)
 }
 
+/// Validate a `ResponseInit` the way Node's `initializeResponse` does, in its
+/// order: status range, then statusText, then the body/null-body-status
+/// conflict. Shared by `new Response` and `Response.json` so the two
+/// construction paths cannot disagree (#10360). Returns (status, statusText).
+///
+/// NaN / 0.0 status are the codegen "no status field" sentinels → 200;
+/// anything else is truncated toward zero and range-checked (#2640). A
+/// missing statusText is "" (#2640). A body under a null-body status is a
+/// TypeError in Node but accepted by Bun, so `--platform bun` skips it.
+pub(crate) unsafe fn response_init(
+    status: f64,
+    status_text: Option<String>,
+    body_present: bool,
+) -> (u16, String) {
+    let status = if status.is_nan() || status == 0.0 {
+        200
+    } else {
+        let truncated = status.trunc();
+        if !(200.0..=599.0).contains(&truncated) {
+            throw_range_error("init[\"status\"] must be in the range of 200 to 599, inclusive.");
+        }
+        truncated as u16
+    };
+    let status_text = match status_text {
+        Some(s) => {
+            if !is_valid_status_text(&s) {
+                throw_type_error("Invalid statusText");
+            }
+            s
+        }
+        None => String::new(),
+    };
+    if body_present && is_null_body_status(status) && js_bun_platform_enabled() == 0 {
+        throw_type_error(&format!(
+            "Response constructor: Invalid response status code {status}"
+        ));
+    }
+    (status, status_text)
+}
+
 /// Web Fetch forbidden request methods — rejected by the Request ctor.
 pub(crate) fn is_forbidden_method(method_upper: &str) -> bool {
     matches!(method_upper, "CONNECT" | "TRACE" | "TRACK")
diff --git a/crates/perry-runtime/src/bun_compat/mod.rs b/crates/perry-runtime/src/bun_compat/mod.rs
index 80f96bc208..30639513c6 100644
--- a/crates/perry-runtime/src/bun_compat/mod.rs
+++ b/crates/perry-runtime/src/bun_compat/mod.rs
@@ -27,6 +27,7 @@ mod cli_utils;
 mod cli_utils_stub;
 mod glob;
 mod jsc;
+mod platform;
 mod plugin;
 mod spawn;
 mod string_width;
@@ -51,6 +52,7 @@ pub use cli_utils::*;
 pub use cli_utils_stub::*;
 pub use glob::js_bun_glob_new;
 pub use jsc::js_bun_jsc_heap_stats;
+pub use platform::{js_bun_platform_enabled, js_set_bun_platform};
 pub use plugin::{decorate_bun_plugin, js_bun_plugin};
 pub use spawn::{js_bun_spawn, js_bun_terminal_new};
 pub use string_width::bun_string_width;
diff --git a/crates/perry-runtime/src/bun_compat/platform.rs b/crates/perry-runtime/src/bun_compat/platform.rs
new file mode 100644
index 0000000000..ff7206be55
--- /dev/null
+++ b/crates/perry-runtime/src/bun_compat/platform.rs
@@ -0,0 +1,47 @@
+//! Runtime view of `perry compile --platform bun` (#10360).
+//!
+//! The platform is a compile-time choice, but a few Web APIs differ between
+//! Node and Bun at runtime. Under `--platform bun` the compiler seeds every
+//! module's init with `__perry_runtime.setBunPlatform()` (next to the
+//! `globalThis.Bun` install), so the flag is set before any user code runs.
+//! It is process-global and only ever turns on.
+//!
+//! Both setter and getter are `#[no_mangle]` so perry-stdlib and the ext
+//! crates (which link the runtime by symbol, not by Rust path) all read the
+//! same flag.
+
+use std::sync::atomic::{AtomicBool, Ordering};
+
+static BUN_PLATFORM: AtomicBool = AtomicBool::new(false);
+
+/// Called from generated module init under `--platform bun`.
+#[no_mangle]
+pub extern "C" fn js_set_bun_platform() {
+    BUN_PLATFORM.store(true, Ordering::Relaxed);
+}
+
+/// 1 when the program was compiled with `--platform bun`, else 0.
+#[no_mangle]
+pub extern "C" fn js_bun_platform_enabled() -> i32 {
+    i32::from(BUN_PLATFORM.load(Ordering::Relaxed))
+}
+
+#[cfg(test)]
+pub(crate) fn reset_bun_platform_for_test() {
+    BUN_PLATFORM.store(false, Ordering::Relaxed);
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn bun_platform_flag_defaults_off_and_turns_on() {
+        reset_bun_platform_for_test();
+        assert_eq!(js_bun_platform_enabled(), 0);
+        js_set_bun_platform();
+        assert_eq!(js_bun_platform_enabled(), 1);
+        reset_bun_platform_for_test();
+        assert_eq!(js_bun_platform_enabled(), 0);
+    }
+}
diff --git a/crates/perry-stdlib/src/fetch/body_clone.rs b/crates/perry-stdlib/src/fetch/body_clone.rs
index be7907cb77..553bc4c1ff 100644
--- a/crates/perry-stdlib/src/fetch/body_clone.rs
+++ b/crates/perry-stdlib/src/fetch/body_clone.rs
@@ -110,14 +110,11 @@ pub unsafe extern "C" fn js_response_static_json(
     } else {
         string_from_header(str_ptr).unwrap_or_else(|| "null".to_string())
     };
-    let status_u16 = if init_status.is_nan() || init_status == 0.0 {
-        200
-    } else {
-        init_status as u16
-    };
-    // Node's `Response.json` leaves statusText "" when not provided — it does
-    // not fall back to the status reason phrase.
-    let status_text = string_from_header(init_status_text_ptr).unwrap_or_default();
+    // Same init validation as `new Response` (#10360): Node range-checks the
+    // status, validates statusText (default "", not the reason phrase), and
+    // rejects the always-present JSON body under a null-body status.
+    let (status_u16, status_text) =
+        super::response_ctor::response_init(init_status, init_status_text_ptr, true);
     // Start from any user-provided headers, then add the default content-type
     // only if the init headers didn't already set one.
     let headers_id = handle_id(headers_handle);
diff --git a/crates/perry-stdlib/src/fetch/response_ctor.rs b/crates/perry-stdlib/src/fetch/response_ctor.rs
index 5df66a6486..5fb195bf89 100644
--- a/crates/perry-stdlib/src/fetch/response_ctor.rs
+++ b/crates/perry-stdlib/src/fetch/response_ctor.rs
@@ -28,30 +28,24 @@ pub(super) fn alloc_response(
     id
 }
 
-/// new Response(body, statusOpt, statusTextPtrOpt, headersHandleOpt)
-/// - body_ptr: StringHeader for the body, or null for ""
-/// - status: f64 (200 default)
-/// - status_text_ptr: StringHeader for statusText, or null for ""
-/// - headers_handle: f64 numeric handle from js_headers_new, or 0
-#[no_mangle]
-pub unsafe extern "C" fn js_response_new(
-    body_ptr: *const StringHeader,
+/// Validate a `ResponseInit` the way Node's `initializeResponse` does, in its
+/// order: status range, then statusText, then the body/null-body-status
+/// conflict. Shared by `new Response` and `Response.json` so the two
+/// construction paths cannot disagree (#10360). Returns (status, statusText).
+///
+/// - `status`: NaN / 0.0 are the codegen "no status field" sentinels. Node
+///   defaults missing status to 200; any explicit value is truncated toward
+///   zero then range-checked against 200..=599 (199.9 → RangeError, 599.9 →
+///   599). Refs #2640.
+/// - `statusText`: Node defaults it to the empty string (NOT the canonical
+///   reason phrase) and validates the reason-phrase token. Refs #2640.
+/// - A body with a null-body status (204/205/304) is a TypeError in Node, but
+///   Bun accepts it, so `--platform bun` programs skip the check.
+pub(super) unsafe fn response_init(
     status: f64,
     status_text_ptr: *const StringHeader,
-    headers_handle: f64,
-) -> f64 {
-    let body_stream_id = take_pending_fetch_body_stream_id();
-    // Consume before validation so a throwing constructor cannot leak body
-    // metadata into the next Response construction on this thread.
-    let body_content_type = take_pending_fetch_body_content_type();
-    // Lossless raw-byte read so binary bodies survive byte-for-byte (#5435).
-    let body_opt = dispatch::body_bytes_from_header(body_ptr);
-    let body_present = body_opt.is_some() || body_stream_id.is_some();
-    let body = body_opt.unwrap_or_default();
-    // NaN / 0.0 are the codegen "no status field" sentinels. Node defaults
-    // missing status to 200; any explicit value is truncated toward zero
-    // then range-checked against 200..=599 (199.9 → RangeError, 599.9 →
-    // 599). Refs #2640.
+    body_present: bool,
+) -> (u16, String) {
     let status_u16 = if status.is_nan() || status == 0.0 {
         200
     } else {
@@ -63,8 +57,6 @@ pub unsafe extern "C" fn js_response_new(
         }
         truncated as u16
     };
-    // Node defaults statusText to the empty string (NOT the canonical
-    // reason phrase) and validates the reason-phrase token. Refs #2640.
     let status_text = match string_from_header(status_text_ptr) {
         Some(s) => {
             if !is_valid_status_text(&s) {
@@ -74,11 +66,38 @@ pub unsafe extern "C" fn js_response_new(
         }
         None => String::new(),
     };
-    if body_present && is_null_body_status(status_u16) {
+    if body_present
+        && is_null_body_status(status_u16)
+        && perry_runtime::bun_compat::js_bun_platform_enabled() == 0
+    {
         throw_fetch_type_error(&format!(
             "Response constructor: Invalid response status code {status_u16}"
         ));
     }
+    (status_u16, status_text)
+}
+
+/// new Response(body, statusOpt, statusTextPtrOpt, headersHandleOpt)
+/// - body_ptr: StringHeader for the body, or null for ""
+/// - status: f64 (200 default)
+/// - status_text_ptr: StringHeader for statusText, or null for ""
+/// - headers_handle: f64 numeric handle from js_headers_new, or 0
+#[no_mangle]
+pub unsafe extern "C" fn js_response_new(
+    body_ptr: *const StringHeader,
+    status: f64,
+    status_text_ptr: *const StringHeader,
+    headers_handle: f64,
+) -> f64 {
+    let body_stream_id = take_pending_fetch_body_stream_id();
+    // Consume before validation so a throwing constructor cannot leak body
+    // metadata into the next Response construction on this thread.
+    let body_content_type = take_pending_fetch_body_content_type();
+    // Lossless raw-byte read so binary bodies survive byte-for-byte (#5435).
+    let body_opt = dispatch::body_bytes_from_header(body_ptr);
+    let body_present = body_opt.is_some() || body_stream_id.is_some();
+    let body = body_opt.unwrap_or_default();
+    let (status_u16, status_text) = response_init(status, status_text_ptr, body_present);
     let headers_id = handle_id(headers_handle);
     let registered = (headers_id != 0)
         .then(|| HEADERS_REGISTRY.lock().unwrap().get(&headers_id).cloned())
diff --git a/crates/perry/src/commands/compile/collect_modules.rs b/crates/perry/src/commands/compile/collect_modules.rs
index cb0b2f13cb..320eb65545 100644
--- a/crates/perry/src/commands/compile/collect_modules.rs
+++ b/crates/perry/src/commands/compile/collect_modules.rs
@@ -755,6 +755,19 @@ fn collect_module_one(
                 value: Box::new(perry_hir::Expr::NativeModuleRef("bun".to_string())),
             }),
         );
+        // #10360: tell the runtime too, for Web APIs whose Bun behavior
+        // differs from Node's. Same every-module seeding as above, so the
+        // flag is on before any dependency's top-level code runs.
+        hir_module.init.insert(
+            0,
+            perry_hir::Stmt::Expr(perry_hir::Expr::NativeMethodCall {
+                module: "__perry_runtime".to_string(),
+                class_name: None,
+                object: None,
+                method: "setBunPlatform".to_string(),
+                args: Vec::new(),
+            }),
+        );
     }
 
     // Preserve native result types before async lowering splits awaited values
diff --git a/crates/perry/tests/issue_10360_bun_platform_response_null_body.rs b/crates/perry/tests/issue_10360_bun_platform_response_null_body.rs
new file mode 100644
index 0000000000..39bf09af79
--- /dev/null
+++ b/crates/perry/tests/issue_10360_bun_platform_response_null_body.rs
@@ -0,0 +1,114 @@
+//! #10360 — a body under a null-body status (204/205/304) throws in Node for
+//! both `new Response(...)` and `Response.json(...)`, but Bun accepts it.
+//! Perry follows Node by default (gap test
+//! `test_gap_response_null_body_status_10360.ts`) and Bun under
+//! `--platform bun`, including in a dependency's top-level code.
+
+use std::path::{Path, PathBuf};
+use std::process::Command;
+
+fn perry_bin() -> PathBuf {
+    PathBuf::from(env!("CARGO_BIN_EXE_perry"))
+}
+
+const DEPENDENCY: &str = r#"
+export const depStatus = (() => {
+  try {
+    return String(new Response("", { status: 204 }).status);
+  } catch (e: any) {
+    return "THREW " + e.constructor.name;
+  }
+})();
+"#;
+
+const MAIN: &str = r#"
+import { depStatus } from "./dependency.ts";
+
+const t = (label: string, f: () => any) => {
+  try {
+    console.log(label, JSON.stringify(f()));
+  } catch (e: any) {
+    console.log(label, "THREW " + e.constructor.name);
+  }
+};
+console.log("dep '' 204", depStatus);
+t("ctor '' 204", () => new Response("", { status: 204 }).status);
+t("ctor 'x' 205", () => new Response("x", { status: 205 }).status);
+t("ctor 'x' 304", () => new Response("x", { status: 304 }).status);
+t("ctor null 204", () => new Response(null, { status: 204 }).status);
+t("json 204", () => Response.json({ a: 1 }, { status: 204 }).status);
+t("json 600", () => Response.json({}, { status: 600 }).status);
+"#;
+
+fn compile_and_run(platform: Option<&str>) -> String {
+    let dir = tempfile::tempdir().expect("tempdir");
+    std::fs::write(dir.path().join("dependency.ts"), DEPENDENCY).expect("write dependency");
+    std::fs::write(dir.path().join("main.ts"), MAIN).expect("write entry");
+    let output = dir.path().join("main_bin");
+    let mut command = Command::new(perry_bin());
+    command
+        .current_dir(dir.path())
+        .arg("compile")
+        .arg(dir.path().join("main.ts"))
+        .arg("-o")
+        .arg(&output);
+    if let Some(platform) = platform {
+        command.arg("--platform").arg(platform);
+    }
+    let compile = command.output().expect("run perry compile");
+    assert!(
+        compile.status.success(),
+        "perry compile failed\nstdout:\n{}\nstderr:\n{}",
+        String::from_utf8_lossy(&compile.stdout),
+        String::from_utf8_lossy(&compile.stderr)
+    );
+    run(&output, dir.path())
+}
+
+fn run(output: &Path, dir: &Path) -> String {
+    let run = Command::new(output)
+        .current_dir(dir)
+        .output()
+        .expect("run compiled binary");
+    assert!(
+        run.status.success(),
+        "compiled binary failed\nstatus: {:?}\nstdout:\n{}\nstderr:\n{}",
+        run.status,
+        String::from_utf8_lossy(&run.stdout),
+        String::from_utf8_lossy(&run.stderr)
+    );
+    String::from_utf8_lossy(&run.stdout).into_owned()
+}
+
+#[test]
+fn bun_platform_accepts_a_body_with_a_null_body_status() {
+    // Bun 1.3.14 prints exactly this. The status range check is not a
+    // null-body rule and still throws in Bun (error text is covered by the
+    // gap test, and Bun words it differently, so only the class is printed).
+    let expected = "\
+dep '' 204 204
+ctor '' 204 204
+ctor 'x' 205 205
+ctor 'x' 304 304
+ctor null 204 204
+json 204 204
+json 600 THREW RangeError
+";
+    assert_eq!(compile_and_run(Some("bun")), expected);
+}
+
+#[test]
+fn node_platform_rejects_a_body_with_a_null_body_status() {
+    // Control for the test above: the same program without `--platform bun`
+    // follows Node, so the Bun result is the platform switch, not a lost check.
+    let expected = "\
+dep '' 204 THREW TypeError
+ctor '' 204 THREW TypeError
+ctor 'x' 205 THREW TypeError
+ctor 'x' 304 THREW TypeError
+ctor null 204 204
+json 204 THREW TypeError
+json 600 THREW RangeError
+";
+    assert_eq!(compile_and_run(None), expected);
+}
diff --git a/docs/src/cli/flags.md b/docs/src/cli/flags.md
index 0154c8bf04..255e2b120d 100644
--- a/docs/src/cli/flags.md
+++ b/docs/src/cli/flags.md
@@ -176,6 +176,13 @@ or `Bun.file` stdio. On POSIX targets, `Bun.Terminal` can attach a subprocess
 to Perry's native PTY implementation; ConPTY-backed terminals are not yet
 available on Windows.
 
+Web APIs otherwise keep Node's behavior; the one runtime difference in this
+mode is that a `Response` may carry a body under a null-body status (204, 205,
+304), as in Bun:
+`new Response("", { status: 204 })` and `Response.json(value, { status: 204 })`
+succeed, where the default `node` mode throws Node's
+`TypeError: Response constructor: Invalid response status code 204`.
+
 ## Embedding Assets
 
 Bake static files (an SPA `dist/`, images, JSON, fonts, …) into the standalone
diff --git a/test-files/test_gap_response_null_body_status_10360.ts b/test-files/test_gap_response_null_body_status_10360.ts
new file mode 100644
index 0000000000..bd5471075e
--- /dev/null
+++ b/test-files/test_gap_response_null_body_status_10360.ts
@@ -0,0 +1,54 @@
+// #10360: a Response init with a null-body status (204/205/304) and a
+// non-null body is a TypeError in Node for BOTH `new Response(...)` and
+// `Response.json(...)`; `Response.json` also shares the constructor's status
+// range and statusText checks. (Bun accepts the null-body case — Perry
+// follows that only under `--platform bun`, covered by
+// crates/perry/tests/issue_10360_bun_platform_response_null_body.rs.)
+const t = (label: string, f: () => any) => {
+  try {
+    const v = f();
+    console.log(label, v === undefined ? "undefined" : JSON.stringify(v));
+  } catch (e: any) {
+    console.log(label, "THREW " + e.constructor.name + ": " + e.message);
+  }
+};
+
+// --- constructor: null / undefined body is fine under any status ---
+t("ctor null 204", () => new Response(null, { status: 204 }).status);
+t("ctor undefined 204", () => new Response(undefined, { status: 204 }).status);
+t("ctor null 304", () => new Response(null, { status: 304 }).status);
+t("ctor no-body 205", () => new Response(undefined, { status: 205, statusText: "Reset" }).statusText);
+
+// --- constructor: non-null body + null-body status throws ---
+t("ctor 'x' 204", () => new Response("x", { status: 204 }).status);
+t("ctor 'x' 205", () => new Response("x", { status: 205 }).status);
+t("ctor 'x' 304", () => new Response("x", { status: 304 }).status);
+t("ctor '' 204", () => new Response("", { status: 204 }).status);
+
+// --- constructor: same body, other statuses ---
+t("ctor 'x' 201", () => new Response("x", { status: 201 }).status);
+t("ctor 'x' 599", () => new Response("x", { status: 599 }).status);
+t("ctor '' 200", () => new Response("", { status: 200 }).status);
+
+// --- Response.json: always has a body, so a null-body status throws ---
+t("json 204", () => Response.json({ a: 1 }, { status: 204 }).status);
+t("json 205", () => Response.json({ a: 1 }, { status: 205 }).status);
+t("json 304", () => Response.json(null, { status: 304 }).status);
+const noContent = { status: 204 };
+t("json 204 via variable init", () => Response.json({ a: 1 }, noContent).status);
+
+// --- Response.json: shares the constructor's status range / statusText checks ---
+t("json 99", () => Response.json({}, { status: 99 }).status);
+t("json 600", () => Response.json({}, { status: 600 }).status);
+t("json 199.9", () => Response.json({}, { status: 199.9 }).status);
+t("json 599.9", () => Response.json({}, { status: 599.9 }).status);
+t("json bad statusText", () => Response.json({}, { statusText: "bad\nline" }).status);
+const badStatus = { status: 600 };
+t("json 600 via variable init", () => Response.json({}, badStatus).status);
+
+// --- Response.json: valid inits still work ---
+t("json default", () => Response.json({ a: 1 }).status);
+t("json 201", () => {
+  const r = Response.json({ a: 1 }, { status: 201, statusText: "Created" });
+  return [r.status, r.statusText, r.headers.get("content-type")];
+});