diff --git a/Cargo.lock b/Cargo.lock
index 044962b..2a44faf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -275,7 +275,7 @@ checksum = "cf54715a573b99ac80df0bc206da022bcd442c974952c7b9720069370852e21f"
 
 [[package]]
 name = "rusty_alloc"
-version = "2.2.3"
+version = "2.2.4"
 dependencies = [
  "libc",
  "loom",
@@ -286,14 +286,14 @@ dependencies = [
 
 [[package]]
 name = "rusty_alloc-api"
-version = "2.2.3"
+version = "2.2.4"
 dependencies = [
  "rusty_alloc",
 ]
 
 [[package]]
 name = "rusty_alloc-bench"
-version = "2.2.3"
+version = "2.2.4"
 dependencies = [
  "libloading",
  "rusty_alloc",
@@ -302,14 +302,14 @@ dependencies = [
 
 [[package]]
 name = "rusty_alloc-ffi"
-version = "2.2.3"
+version = "2.2.4"
 dependencies = [
  "rusty_alloc",
 ]
 
 [[package]]
 name = "rusty_alloc-override"
-version = "2.2.3"
+version = "2.2.4"
 dependencies = [
  "rusty_alloc",
  "rusty_alloc-ffi",
@@ -317,7 +317,7 @@ dependencies = [
 
 [[package]]
 name = "rusty_alloc-wasm"
-version = "2.2.3"
+version = "2.2.4"
 dependencies = [
  "rusty_alloc",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index dabf768..c9a6676 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -132,7 +132,7 @@ members = [
 # different files that never got the section. Fixed here, in both, and
 # verified by extracting the packaged `.crate` before publishing rather than
 # checking the live page afterwards.
-version = "2.2.3"
+version = "2.2.4"
 edition = "2024"
 # MSRV. Declared for the first time in 1.0.1 because this release genuinely
 # needs it: `asm!` label blocks (`asm_goto`, stable 1.87) carry the free path's
diff --git a/crates/rusty_alloc/CHANGELOG.md b/crates/rusty_alloc/CHANGELOG.md
index e902283..e02f0d1 100644
--- a/crates/rusty_alloc/CHANGELOG.md
+++ b/crates/rusty_alloc/CHANGELOG.md
@@ -7,6 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.2.4](https://github.com/Remade-With-Rust/rusty_alloc/compare/rusty_alloc-v2.2.3...rusty_alloc-v2.2.4) - 2026-10-08
+
+### Semver note (read before upgrading)
+
+`rusty_alloc::heap::Heap` gained three public fields (`large_cache`,
+`large_freed`, `deferred_due`). Every field of `Heap` is public, so code that
+builds a `Heap` with a struct literal must add them; `cargo-semver-checks`
+reports this as a breaking change. It ships as a patch deliberately: `Heap`
+is allocator state that callers create with `Heap::new()`, and every known
+consumer (spacedb, rusty_alloc_default, rusty_zstd) compiles unchanged. If
+you build `Heap { .. }` yourself, start from `Heap::new()` instead.
+
 ### Fixed
 
 - **Freed model memory no longer stays stranded after a loader thread
diff --git a/crates/rusty_alloc_api/Cargo.toml b/crates/rusty_alloc_api/Cargo.toml
index f92e533..40772bb 100644
--- a/crates/rusty_alloc_api/Cargo.toml
+++ b/crates/rusty_alloc_api/Cargo.toml
@@ -14,7 +14,7 @@ readme = "README.md"
 [dependencies]
 # A published crate needs a VERSION alongside the path: the path is what the
 # workspace builds against, the version is what crates.io resolves.
-rusty_alloc = { path = "../rusty_alloc", version = "2.2.3", default-features = false }
+rusty_alloc = { path = "../rusty_alloc", version = "2.2.4", default-features = false }
 
 [features]
 # Mirrors the core's (P3, docs/plans/small-metal.md). Default-on, so every