diff --git a/.changeset/lazy-empty-case.md b/.changeset/lazy-empty-case.md
deleted file mode 100644
index 06b1537..0000000
--- a/.changeset/lazy-empty-case.md
+++ /dev/null
@@ -1,9 +0,0 @@
----
-'@smooai/file': patch
----
-
-Add the zero-byte case to the lazy-streaming contract, and give Go a way to say "size not measured".
-
-`spec/lazy-stream-contract.json` pinned 1 KiB, 64 KiB and 1 MiB sources but not the 0-byte boundary, where "shorter than the detection head" degenerates. Empty S3 objects and zero-length uploads are real — this repo already ships `empty.txt` as a fixture.
-
-Adding it immediately failed the Go loader, for a real reason: `Size() int64` cannot express "unknown". Go has no optional integer, so `Size() == 0` was doing double duty for an empty file and for a lazy stream whose tail nobody had counted — the other four ports say the latter with `nil` / `None` / `undefined`. New `(*File).SizeKnown() bool` separates them. Additive and non-breaking: the field's zero value means "known", so every eager constructor stays correct untouched.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7eab740..f1188a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # @smooai/file
 
+## 2.2.19
+
+### Patch Changes
+
+- edc71da: Add the zero-byte case to the lazy-streaming contract, and give Go a way to say "size not measured".
+
+    `spec/lazy-stream-contract.json` pinned 1 KiB, 64 KiB and 1 MiB sources but not the 0-byte boundary, where "shorter than the detection head" degenerates. Empty S3 objects and zero-length uploads are real — this repo already ships `empty.txt` as a fixture.
+
+    Adding it immediately failed the Go loader, for a real reason: `Size() int64` cannot express "unknown". Go has no optional integer, so `Size() == 0` was doing double duty for an empty file and for a lazy stream whose tail nobody had counted — the other four ports say the latter with `nil` / `None` / `undefined`. New `(*File).SizeKnown() bool` separates them. Additive and non-breaking: the field's zero value means "known", so every eager constructor stays correct untouched.
+
 ## 2.2.18
 
 ### Patch Changes
diff --git a/dotnet/src/SmooAI.File.S3/SmooAI.File.S3.csproj b/dotnet/src/SmooAI.File.S3/SmooAI.File.S3.csproj
index f892189..b52f34d 100644
--- a/dotnet/src/SmooAI.File.S3/SmooAI.File.S3.csproj
+++ b/dotnet/src/SmooAI.File.S3/SmooAI.File.S3.csproj
@@ -10,7 +10,7 @@
     <PackageId>SmooAI.File.S3</PackageId>
     <RootNamespace>SmooAI.File.S3</RootNamespace>
     <AssemblyName>SmooAI.File.S3</AssemblyName>
-    <Version>2.2.18</Version>
+    <Version>2.2.19</Version>
     <Description>S3 helpers for SmooAI.File — createPresignedUploadUrl, createFromS3, uploadToS3, saveToS3.</Description>
     <PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>
diff --git a/dotnet/src/SmooAI.File/SmooAI.File.csproj b/dotnet/src/SmooAI.File/SmooAI.File.csproj
index a31025e..9726e39 100644
--- a/dotnet/src/SmooAI.File/SmooAI.File.csproj
+++ b/dotnet/src/SmooAI.File/SmooAI.File.csproj
@@ -10,7 +10,7 @@
     <PackageId>SmooAI.File</PackageId>
     <RootNamespace>SmooAI.File</RootNamespace>
     <AssemblyName>SmooAI.File</AssemblyName>
-    <Version>2.2.18</Version>
+    <Version>2.2.19</Version>
     <Description>File utilities with magic-byte MIME detection (via Mime-Detective) and typed validation errors. Use SmooAI.File.S3 for S3 upload/download helpers.</Description>
     <PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>
diff --git a/go/file/version.go b/go/file/version.go
index 91582a3..4c7178b 100644
--- a/go/file/version.go
+++ b/go/file/version.go
@@ -1,4 +1,4 @@
 package file
 
 // Version is the current version of the smooai-file Go package.
-const Version = "2.2.18"
+const Version = "2.2.19"
diff --git a/package.json b/package.json
index 15d4021..b75b0a5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@smooai/file",
-    "version": "2.2.18",
+    "version": "2.2.19",
     "description": "File operations that don't lie — magic-byte MIME detection catches spoofed extensions, size + content validation is built in, and presigned S3 uploads are one call away. Stream-first so large uploads don't blow your memory.",
     "homepage": "https://github.com/SmooAI/file#readme",
     "bugs": {
diff --git a/python/pyproject.toml b/python/pyproject.toml
index 06ec643..00d3a7f 100644
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "smooai-file"
-version = "2.2.18"
+version = "2.2.19"
 description = "A unified file handling library for working with files from local filesystem, S3, URLs, and streams."
 readme = "README.md"
 authors = [{ name = "SmooAI", email = "brent@smooai.com" }]
diff --git a/python/src/smooai_file/__init__.py b/python/src/smooai_file/__init__.py
index 5dd00b5..1ec4b13 100644
--- a/python/src/smooai_file/__init__.py
+++ b/python/src/smooai_file/__init__.py
@@ -4,7 +4,7 @@
 S3, URLs, and streams.
 """
 
-__version__ = "2.2.18"
+__version__ = "2.2.19"
 
 from ._content_disposition import parse_content_disposition
 from ._detection import detect_from_bytes, detect_from_extension, extension_from_mime
diff --git a/rust/file/Cargo.lock b/rust/file/Cargo.lock
index 97333b1..1bb8d59 100644
--- a/rust/file/Cargo.lock
+++ b/rust/file/Cargo.lock
@@ -2279,7 +2279,7 @@ checksum = "67b1b7a3b5fe4f1376887184045fcf45c69e92af734b7aaddc05fb777b6fbd03"
 
 [[package]]
 name = "smooai-file"
-version = "2.2.18"
+version = "2.2.19"
 dependencies = [
  "aws-config",
  "aws-sdk-s3",
diff --git a/rust/file/Cargo.toml b/rust/file/Cargo.toml
index 98a3d2e..86bd2d3 100644
--- a/rust/file/Cargo.toml
+++ b/rust/file/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "smooai-file"
-version = "2.2.18"
+version = "2.2.19"
 edition = "2021"
 description = "A unified file handling library for working with files from local filesystem, S3, URLs, and streams."
 license = "MIT"