diff --git a/CHANGELOG.md b/CHANGELOG.md
index 069dd158f1..46e71ca052 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,43 @@
+## v0.5.1160 — fix(hir): `queueMicrotask`/`structuredClone`/`atob`/`btoa` as first-class function values (#5015)
+
+Fixes #5015 — react-reconciler 0.33 production build threw `TypeError: value is
+not a function` inside `updateContainerSync` on the first render, blocking every
+custom React renderer (ink, react-three-fiber, react-pdf, …).
+
+**Root cause.** Four callable global helpers — `queueMicrotask`,
+`structuredClone`, `atob`, `btoa` — were callable directly
+(`queueMicrotask(fn)` is picked off in `expr_call/globals.rs`) but were never
+added to `is_builtin_global_value_name` in `crates/perry-hir/src/analysis/builtins.rs`.
+So a bare *value* read — `const m = queueMicrotask`, or the object-literal
+property `{ scheduleMicrotask: queueMicrotask }` — fell through the ident
+lowering to the `GlobalGet(0)` sentinel and evaluated to the **number `0`**.
+`typeof` reported `"number"` and calling the stored value threw "value is not a
+function". (The companion `typeof`-of-bare-ident fold and the
+`globalThis.<name>` thunk table already covered these names; only the value-read
+list was missing them — a gap left over from #3986.)
+
+react-reconciler stores the host config's `scheduleMicrotask: queueMicrotask`
+into a module var and later invokes it from
+`scheduleImmediateRootScheduleTask` (reached via `updateContainerSync →
+updateContainerImpl → scheduleUpdateOnFiber → ensureRootIsScheduled`). The
+stored `0` was the non-callable the issue's backtrace pinpointed.
+
+**Fix.** Add the four names to `is_builtin_global_value_name` so a bare value
+read lowers to `PropertyGet { GlobalGet(0), <name> }`, resolving through the
+existing globalThis thunk (the same path `fetch`/`parseInt`/`eval` already use).
+This fixes both the bare value read and the object-literal property form, and
+is value-read-only — direct calls are unaffected. Regression test:
+`test-files/test_gap_global_fn_values_5015.ts` (byte-for-byte vs Node).
+
+**Follow-up wall (separate bug, not in this PR).** With this fix
+`updateContainerSync` succeeds; the minimal repro's subsequent `flushSyncWork()`
+now reaches `commitRoot`, where `flushPendingEffects` — a forward-referenced,
+hoisted sibling function declaration captured by `commitRoot` inside the
+huge `module.exports = function($$$config){…}` factory — reads back as
+`undefined` (a distinct closure-capture/box issue, independent of
+`queueMicrotask`: it reproduces with an arrow `scheduleMicrotask` too). To be
+filed as its own issue.
+
 ## v0.5.1159 — security: fix path traversal / arbitrary file write in `perry publish` (GHSA-x55v-q459-68ch)
 
 Security release. `perry publish` trusted the build server's
diff --git a/CLAUDE.md b/CLAUDE.md
index cf373ab269..39171039e8 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:** 0.5.1159
+**Current Version:** 0.5.1160
 
 
 ## TypeScript Parity Status
diff --git a/Cargo.lock b/Cargo.lock
index fc518b399f..caf0cc80a8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5289,7 +5289,7 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
 [[package]]
 name = "perry"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "base64",
@@ -5344,14 +5344,14 @@ dependencies = [
 
 [[package]]
 name = "perry-api-manifest"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "perry-audio-miniaudio"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "cc",
  "libc",
@@ -5359,7 +5359,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "log",
@@ -5374,7 +5374,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-arkts"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5383,7 +5383,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-glance"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5391,7 +5391,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-js"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-dispatch",
@@ -5401,7 +5401,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-swiftui"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5410,7 +5410,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wasm"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "base64",
@@ -5423,7 +5423,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wear-tiles"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5431,7 +5431,7 @@ dependencies = [
 
 [[package]]
 name = "perry-container-compose"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -5460,14 +5460,14 @@ dependencies = [
 
 [[package]]
 name = "perry-container-e2e"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
 ]
 
 [[package]]
 name = "perry-diagnostics"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "serde",
  "serde_json",
@@ -5475,7 +5475,7 @@ dependencies = [
 
 [[package]]
 name = "perry-dispatch"
-version = "0.5.1159"
+version = "0.5.1160"
 
 [[package]]
 name = "perry-doc-fixture-my-bindings"
@@ -5486,7 +5486,7 @@ dependencies = [
 
 [[package]]
 name = "perry-doc-tests"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "clap",
@@ -5501,14 +5501,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ads"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-argon2"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "argon2",
  "perry-ffi",
@@ -5516,7 +5516,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-axios"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "reqwest",
@@ -5525,7 +5525,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-bcrypt"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "bcrypt",
  "perry-ffi",
@@ -5533,7 +5533,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-better-sqlite3"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "rusqlite",
@@ -5541,7 +5541,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cheerio"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "scraper",
@@ -5549,7 +5549,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-commander"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5557,7 +5557,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cron"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "chrono",
  "cron 0.16.0",
@@ -5567,7 +5567,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dayjs"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5575,7 +5575,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-decimal"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "rust_decimal",
@@ -5583,7 +5583,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dotenv"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "serde_json",
@@ -5591,7 +5591,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ethers"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "rand 0.8.6",
@@ -5599,7 +5599,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-events"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5607,14 +5607,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-exponential-backoff"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-fastify"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "bytes",
  "http-body-util",
@@ -5631,7 +5631,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-fetch"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -5643,7 +5643,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-http"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "lazy_static",
  "perry-ext-http-server",
@@ -5656,7 +5656,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-http-server"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "bytes",
  "h2",
@@ -5679,7 +5679,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ioredis"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -5689,7 +5689,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-jsonwebtoken"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "jsonwebtoken",
@@ -5700,7 +5700,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-lru-cache"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "lru",
  "perry-ffi",
@@ -5708,7 +5708,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-moment"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5716,7 +5716,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mongodb"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "bson",
  "futures-util",
@@ -5728,7 +5728,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mysql2"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5738,7 +5738,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nanoid"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "nanoid",
  "perry-ffi",
@@ -5747,7 +5747,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-net"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5759,7 +5759,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nodemailer"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "lettre",
  "perry-ffi",
@@ -5769,7 +5769,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pdf"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "printpdf",
@@ -5777,7 +5777,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pg"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "sqlx",
@@ -5786,7 +5786,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ratelimit"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "governor",
  "perry-ffi",
@@ -5794,7 +5794,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-sharp"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "image",
@@ -5803,14 +5803,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-slugify"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-streams"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -5819,7 +5819,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-uuid"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "uuid",
@@ -5827,7 +5827,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-validator"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ffi",
  "regex",
@@ -5837,7 +5837,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ws"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "futures-util",
  "lazy_static",
@@ -5849,7 +5849,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-zlib"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "brotli",
  "flate2",
@@ -5858,7 +5858,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ffi"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "dashmap",
  "once_cell",
@@ -5867,7 +5867,7 @@ dependencies = [
 
 [[package]]
 name = "perry-hir"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-api-manifest",
@@ -5884,7 +5884,7 @@ dependencies = [
 
 [[package]]
 name = "perry-parser"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-diagnostics",
@@ -5896,7 +5896,7 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "base64",
@@ -5928,7 +5928,7 @@ dependencies = [
 
 [[package]]
 name = "perry-stdlib"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "aes 0.8.4",
  "aes-gcm",
@@ -6020,7 +6020,7 @@ dependencies = [
 
 [[package]]
 name = "perry-transform"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -6030,7 +6030,7 @@ dependencies = [
 
 [[package]]
 name = "perry-types"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "anyhow",
  "thiserror 1.0.69",
@@ -6038,14 +6038,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ui"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ui-model",
 ]
 
 [[package]]
 name = "perry-ui-android"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "itoa",
@@ -6062,7 +6062,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-geisterhand"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "rand 0.8.6",
  "serde",
@@ -6072,7 +6072,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-gtk4"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "cairo-rs",
@@ -6095,7 +6095,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-ios"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "block2",
@@ -6111,7 +6111,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-macos"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "block2",
@@ -6126,7 +6126,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-model"
-version = "0.5.1159"
+version = "0.5.1160"
 
 [[package]]
 name = "perry-ui-test"
@@ -6134,11 +6134,11 @@ version = "0.1.0"
 
 [[package]]
 name = "perry-ui-testkit"
-version = "0.5.1159"
+version = "0.5.1160"
 
 [[package]]
 name = "perry-ui-tvos"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "block2",
@@ -6154,7 +6154,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-visionos"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "block2",
@@ -6170,7 +6170,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-watchos"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "block2",
  "libc",
@@ -6183,7 +6183,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "libc",
@@ -6200,14 +6200,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows-winui"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "perry-ui-windows",
 ]
 
 [[package]]
 name = "perry-updater"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "base64",
  "ed25519-dalek",
@@ -6221,7 +6221,7 @@ dependencies = [
 
 [[package]]
 name = "perry-wasm-host"
-version = "0.5.1159"
+version = "0.5.1160"
 dependencies = [
  "wasmi",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index df70a4497d..9bb262a625 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -201,7 +201,7 @@ codegen-units = 16
 opt-level = "s"       # Optimize for size in stdlib
 
 [workspace.package]
-version = "0.5.1159"
+version = "0.5.1160"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/PerryTS/perry"
diff --git a/crates/perry-hir/src/analysis/builtins.rs b/crates/perry-hir/src/analysis/builtins.rs
index 52281eea46..36860f3202 100644
--- a/crates/perry-hir/src/analysis/builtins.rs
+++ b/crates/perry-hir/src/analysis/builtins.rs
@@ -157,6 +157,21 @@ pub(crate) fn is_builtin_global_value_name(name: &str) -> bool {
             // thunk (no dedicated HIR variant). Used by `qs` (→ `stripe`).
             | "escape"
             | "unescape"
+            // #5015: callable global helpers that have a `globalThis.<name>`
+            // thunk and are recognized as known globals + folded to typeof
+            // "function" (#3986), but were never added here — so a bare *value*
+            // read (`const m = queueMicrotask`, `{ scheduleMicrotask:
+            // queueMicrotask }`) fell through to the `GlobalGet(0)` sentinel and
+            // evaluated to the number `0`, not a function. react-reconciler's
+            // host config (`scheduleMicrotask: queueMicrotask`) hit exactly this:
+            // `updateContainerSync` → `scheduleImmediateRootScheduleTask` called
+            // the stored `0` and threw "value is not a function". Direct CALLS
+            // (`queueMicrotask(fn)`, `btoa(s)`) are picked off earlier in
+            // expr_call/globals.rs, so this only affects value reads.
+            | "queueMicrotask"
+            | "structuredClone"
+            | "atob"
+            | "btoa"
     )
 }
 
diff --git a/test-files/test_gap_global_fn_values_5015.ts b/test-files/test_gap_global_fn_values_5015.ts
new file mode 100644
index 0000000000..feb5e3fbf2
--- /dev/null
+++ b/test-files/test_gap_global_fn_values_5015.ts
@@ -0,0 +1,35 @@
+// #5015 — callable global helpers used as first-class VALUES.
+// queueMicrotask / structuredClone / atob / btoa were callable directly
+// (`queueMicrotask(fn)`) but a bare value read (`const m = queueMicrotask`,
+// `{ scheduleMicrotask: queueMicrotask }`) fell through to the GlobalGet(0)
+// sentinel and evaluated to the number 0 — so `typeof` was "number" and
+// calling the stored value threw "value is not a function". This is exactly
+// what react-reconciler's host config (`scheduleMicrotask: queueMicrotask`)
+// hit inside updateContainerSync → scheduleImmediateRootScheduleTask.
+
+// Bare value reads: typeof must be "function".
+const qm: any = queueMicrotask;
+const sc: any = structuredClone;
+const a: any = atob;
+const b: any = btoa;
+console.log(typeof qm, typeof sc, typeof a, typeof b);
+
+// As object-literal property values (the react-reconciler host-config shape),
+// then extracted and called.
+const cfg: any = {
+  scheduleMicrotask: queueMicrotask,
+  clone: structuredClone,
+  decode: atob,
+  encode: btoa,
+};
+console.log(typeof cfg.scheduleMicrotask, typeof cfg.clone, typeof cfg.decode, typeof cfg.encode);
+
+// Call through the stored value.
+console.log(JSON.stringify(cfg.clone({ x: 1, y: [2, 3] })));
+console.log(cfg.encode("hi"), cfg.decode(cfg.encode("hi")));
+cfg.scheduleMicrotask(() => console.log("microtask ran"));
+
+// Direct calls still work (these were always fine — guard against regressions).
+console.log(btoa("ok"), atob("b2s="));
+console.log(JSON.stringify(structuredClone([1, { a: 2 }])));
+queueMicrotask(() => console.log("direct microtask ran"));