diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index 79d0699c0c..21cfe857f0 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "hyperframes",
   "description": "HyperFrames by HeyGen. Write HTML, render video. Compositions, GSAP and runtime adapter animations, captions, voiceovers, audio-reactive visuals, and website capture for HyperFrames.",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "author": {
     "name": "HeyGen",
     "email": "hyperframes@heygen.com",
diff --git a/.codex-plugin/plugin.json b/.codex-plugin/plugin.json
index c8986414fa..4033cc94ec 100644
--- a/.codex-plugin/plugin.json
+++ b/.codex-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "hyperframes",
   "description": "Write HTML, render video. Compositions, Tailwind v4 styles, GSAP and runtime adapter animations, captions, voiceovers, audio-reactive visuals, and website capture for HyperFrames.",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "author": {
     "name": "HeyGen",
     "email": "hyperframes@heygen.com",
diff --git a/.cursor-plugin/plugin.json b/.cursor-plugin/plugin.json
index 396a741a19..2c9c2e2580 100644
--- a/.cursor-plugin/plugin.json
+++ b/.cursor-plugin/plugin.json
@@ -3,7 +3,7 @@
   "name": "hyperframes",
   "displayName": "HyperFrames by HeyGen",
   "description": "Write HTML, render video. Compositions, Tailwind v4 styles, GSAP and runtime adapter animations, captions, voiceovers, audio-reactive visuals, and website capture for HyperFrames.",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "author": {
     "name": "HeyGen",
     "email": "hyperframes@heygen.com"
diff --git a/docs/changelog.mdx b/docs/changelog.mdx
index fe7b6dec7f..8e29f75261 100644
--- a/docs/changelog.mdx
+++ b/docs/changelog.mdx
@@ -8,6 +8,24 @@ Recent HyperFrames releases, including user-facing features, fixes, and migratio
 
 {/* New release entries are prepended by `bun run changelog:draft <version> --write`. */}
 
+<Update
+  label="HyperFrames v0.8.44"
+  description="Released - 2026-09-16"
+  tags={["Release", "Engine", "Lint"]}
+>
+The `root_dimensions_mismatch` false positive from v0.8.43 is fixed, so `lint` and `check --strict` stop flagging sub-compositions. The streaming encoder gains an opt-in locked keyframe interval, which no existing render turns on.
+
+## Features
+
+- **Engine:** The streaming encoder accepts `lockGopForChunkConcat` and `gopSize`, which force a keyframe at a fixed interval so encoded output can be cut and joined without re-encoding. It already existed on the disk encoder and now emits identical arguments on both paths. The flag defaults to off and an existing render produces the same FFmpeg arguments as before ([b4f1929cf](https://github.com/heygen-com/hyperframes/commit/b4f1929cf0a7f7450185f36b29be69d2a952bc6f), [#3973](https://github.com/heygen-com/hyperframes/pull/3973)).
+
+## Fixes
+
+- **Lint:** `root_dimensions_mismatch` no longer fires for sub-compositions. A sub-composition's own `<meta viewport>` and `html, body` CSS never reach the live rendering document, because the runtime mounts only its matched subtree, so the warning was drift that could not clip anything. v0.8.43 shipped the warning with this known false positive and this is the promised follow-up. A top-level mismatch is still reported, and a viewport-meta-only mismatch now says so in its own words rather than warning about clipping ([2229d0d6a](https://github.com/heygen-com/hyperframes/commit/2229d0d6a6eaca5822cc5bfdfa0dc02812667db1), [#4012](https://github.com/heygen-com/hyperframes/pull/4012)).
+
+[View the full commit range](https://github.com/heygen-com/hyperframes/compare/v0.8.43...v0.8.44).
+</Update>
+
 <Update
   label="HyperFrames v0.8.43"
   description="Released - 2026-09-16"
diff --git a/packages/aws-lambda/package.json b/packages/aws-lambda/package.json
index 38dd29b994..68b051ed62 100644
--- a/packages/aws-lambda/package.json
+++ b/packages/aws-lambda/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/aws-lambda",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "AWS Lambda adapter for HyperFrames distributed rendering — handler, client-side SDK, and CDK construct.",
   "repository": {
     "type": "git",
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 6fafc8fb45..c63baf7a49 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/cli",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "HyperFrames CLI — create, preview, and render HTML video compositions",
   "license": "Apache-2.0",
   "repository": {
diff --git a/packages/core/package.json b/packages/core/package.json
index caf95acc7d..fe98f4bfb8 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/core",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "",
   "repository": {
     "type": "git",
diff --git a/packages/engine/package.json b/packages/engine/package.json
index 09d169355a..277906e05c 100644
--- a/packages/engine/package.json
+++ b/packages/engine/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/engine",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "Seekable web page to video rendering engine (Puppeteer + FFmpeg)",
   "repository": {
     "type": "git",
diff --git a/packages/gcp-cloud-run/package.json b/packages/gcp-cloud-run/package.json
index 4c45b9ca4d..98b1bb9f08 100644
--- a/packages/gcp-cloud-run/package.json
+++ b/packages/gcp-cloud-run/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/gcp-cloud-run",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "Google Cloud Run + Workflows adapter for HyperFrames distributed rendering — request handler, client-side SDK, and Terraform module.",
   "repository": {
     "type": "git",
diff --git a/packages/lint/package.json b/packages/lint/package.json
index ed5b0b430a..ef6bef5a41 100644
--- a/packages/lint/package.json
+++ b/packages/lint/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/lint",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "repository": {
     "type": "git",
     "url": "https://github.com/heygen-com/hyperframes",
diff --git a/packages/parsers/package.json b/packages/parsers/package.json
index cce28e416f..c679ee6e83 100644
--- a/packages/parsers/package.json
+++ b/packages/parsers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/parsers",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "repository": {
     "type": "git",
     "url": "https://github.com/heygen-com/hyperframes",
diff --git a/packages/player/package.json b/packages/player/package.json
index 05f4278bf9..f5701720a1 100644
--- a/packages/player/package.json
+++ b/packages/player/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/player",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "Embeddable web component for HyperFrames compositions",
   "repository": {
     "type": "git",
diff --git a/packages/producer/package.json b/packages/producer/package.json
index ea2dc5d636..08202be520 100644
--- a/packages/producer/package.json
+++ b/packages/producer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/producer",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "HTML-to-video rendering engine using Chrome's BeginFrame API",
   "repository": {
     "type": "git",
diff --git a/packages/sdk/package.json b/packages/sdk/package.json
index e224e6d8e8..bf40fafdf7 100644
--- a/packages/sdk/package.json
+++ b/packages/sdk/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/sdk",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "Headless, framework-neutral HyperFrames composition editing engine",
   "repository": {
     "type": "git",
diff --git a/packages/shader-transitions/package.json b/packages/shader-transitions/package.json
index e5a16ae866..6da162a057 100644
--- a/packages/shader-transitions/package.json
+++ b/packages/shader-transitions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/shader-transitions",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "WebGL shader transitions for HyperFrames compositions",
   "repository": {
     "type": "git",
diff --git a/packages/studio-server/package.json b/packages/studio-server/package.json
index 6385c7956c..c3c819fae6 100644
--- a/packages/studio-server/package.json
+++ b/packages/studio-server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/studio-server",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "repository": {
     "type": "git",
     "url": "https://github.com/heygen-com/hyperframes",
diff --git a/packages/studio/package.json b/packages/studio/package.json
index 9110ebb9de..53e6b9e8d7 100644
--- a/packages/studio/package.json
+++ b/packages/studio/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/studio",
-  "version": "0.8.43",
+  "version": "0.8.44",
   "description": "",
   "repository": {
     "type": "git",
diff --git a/releases/v0.8.44.md b/releases/v0.8.44.md
new file mode 100644
index 0000000000..9ad39ea03d
--- /dev/null
+++ b/releases/v0.8.44.md
@@ -0,0 +1,17 @@
+# HyperFrames v0.8.44
+
+Released on 2026-09-16.
+
+The `root_dimensions_mismatch` false positive from v0.8.43 is fixed, so `lint` and `check --strict` stop flagging sub-compositions. The streaming encoder gains an opt-in locked keyframe interval, which no existing render turns on.
+
+## Features
+
+- **Engine:** The streaming encoder accepts `lockGopForChunkConcat` and `gopSize`, which force a keyframe at a fixed interval so encoded output can be cut and joined without re-encoding. It already existed on the disk encoder and now emits identical arguments on both paths. The flag defaults to off and an existing render produces the same FFmpeg arguments as before ([b4f1929cf](https://github.com/heygen-com/hyperframes/commit/b4f1929cf0a7f7450185f36b29be69d2a952bc6f), [#3973](https://github.com/heygen-com/hyperframes/pull/3973)).
+
+## Fixes
+
+- **Lint:** `root_dimensions_mismatch` no longer fires for sub-compositions. A sub-composition's own `<meta viewport>` and `html, body` CSS never reach the live rendering document, because the runtime mounts only its matched subtree, so the warning was drift that could not clip anything. v0.8.43 shipped the warning with this known false positive and this is the promised follow-up. A top-level mismatch is still reported, and a viewport-meta-only mismatch now says so in its own words rather than warning about clipping ([2229d0d6a](https://github.com/heygen-com/hyperframes/commit/2229d0d6a6eaca5822cc5bfdfa0dc02812667db1), [#4012](https://github.com/heygen-com/hyperframes/pull/4012)).
+
+## Full changelog
+
+https://github.com/heygen-com/hyperframes/compare/v0.8.43...v0.8.44