diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index 379083f38..156b91236 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": "0.7.65",
+  "version": "0.7.66",
   "author": {
     "name": "HeyGen",
     "email": "hyperframes@heygen.com",
diff --git a/.codex-plugin/plugin.json b/.codex-plugin/plugin.json
index 1ea3a1635..1bc42ab77 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": "0.7.65",
+  "version": "0.7.66",
   "author": {
     "name": "HeyGen",
     "email": "hyperframes@heygen.com",
diff --git a/.cursor-plugin/plugin.json b/.cursor-plugin/plugin.json
index d82c79454..0ddefc96c 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": "0.7.65",
+  "version": "0.7.66",
   "author": {
     "name": "HeyGen",
     "email": "hyperframes@heygen.com"
diff --git a/docs/changelog.mdx b/docs/changelog.mdx
index 1dfeabd2d..d701c1382 100644
--- a/docs/changelog.mdx
+++ b/docs/changelog.mdx
@@ -8,6 +8,25 @@ 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 v0.7.66"
+  description="Released - 2026-07-21"
+  tags={["Release", "Studio", "Skills", "Engine"]}
+>
+Studio preview audio now plays at playback speeds above 1x instead of being silently muted, and the mute control stays usable at every speed. This release also fixes an engine worker frame-stride false-positive and lands a c2v skills mining pass with new blueprints and rules.
+
+## Features
+
+- **Skills:** C2v mining pass — 7 new blueprints, 10 new rules, compacted recipe corpus ([853256403](https://github.com/heygen-com/hyperframes/commit/853256403b3ffd3dc0b616785ab876b4c0f04a89), [#2680](https://github.com/heygen-com/hyperframes/pull/2680))
+
+## Fixes
+
+- **Studio:** Play preview audio at speeds above 1x ([07965e9fe](https://github.com/heygen-com/hyperframes/commit/07965e9fe93fc7b53dfe7c933f8abd0c4b10c86d), [#2691](https://github.com/heygen-com/hyperframes/pull/2691))
+- **Engine:** Carry frameStride onto WorkerResult (fixes interleaved worker false-positive) ([4f53dd4f2](https://github.com/heygen-com/hyperframes/commit/4f53dd4f2cd607de17b2d2329746fa5da0cadeaa))
+
+[View the full commit range](https://github.com/heygen-com/hyperframes/compare/v0.7.65...v0.7.66).
+</Update>
+
 <Update
   label="HyperFrames v0.7.65"
   description="Released - 2026-07-21"
diff --git a/packages/aws-lambda/package.json b/packages/aws-lambda/package.json
index 7f84f40c9..9cd0f061c 100644
--- a/packages/aws-lambda/package.json
+++ b/packages/aws-lambda/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/aws-lambda",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "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 180852ba6..71984e085 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/cli",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "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 b61e617e7..2a6934b23 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/core",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "description": "",
   "repository": {
     "type": "git",
diff --git a/packages/engine/package.json b/packages/engine/package.json
index f176092e2..4903834b2 100644
--- a/packages/engine/package.json
+++ b/packages/engine/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/engine",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "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 c835bb312..541f1372c 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": "0.7.65",
+  "version": "0.7.66",
   "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 6e1efa909..99b97c14a 100644
--- a/packages/lint/package.json
+++ b/packages/lint/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/lint",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "repository": {
     "type": "git",
     "url": "https://github.com/heygen-com/hyperframes",
diff --git a/packages/parsers/package.json b/packages/parsers/package.json
index ecf10381e..b4cc18568 100644
--- a/packages/parsers/package.json
+++ b/packages/parsers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/parsers",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "repository": {
     "type": "git",
     "url": "https://github.com/heygen-com/hyperframes",
diff --git a/packages/player/package.json b/packages/player/package.json
index 25207ef42..5c0483776 100644
--- a/packages/player/package.json
+++ b/packages/player/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/player",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "description": "Embeddable web component for HyperFrames compositions",
   "repository": {
     "type": "git",
diff --git a/packages/producer/package.json b/packages/producer/package.json
index a5d3ffd0f..fae9241cd 100644
--- a/packages/producer/package.json
+++ b/packages/producer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/producer",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "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 400ff3b3c..14874c990 100644
--- a/packages/sdk/package.json
+++ b/packages/sdk/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/sdk",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "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 4dab8da21..78d7b348f 100644
--- a/packages/shader-transitions/package.json
+++ b/packages/shader-transitions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/shader-transitions",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "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 55ff87de4..dd2323b02 100644
--- a/packages/studio-server/package.json
+++ b/packages/studio-server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/studio-server",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "repository": {
     "type": "git",
     "url": "https://github.com/heygen-com/hyperframes",
diff --git a/packages/studio/package.json b/packages/studio/package.json
index c4744110c..d9e38c5ff 100644
--- a/packages/studio/package.json
+++ b/packages/studio/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hyperframes/studio",
-  "version": "0.7.65",
+  "version": "0.7.66",
   "description": "",
   "repository": {
     "type": "git",
diff --git a/releases/v0.7.66.md b/releases/v0.7.66.md
new file mode 100644
index 000000000..58574525f
--- /dev/null
+++ b/releases/v0.7.66.md
@@ -0,0 +1,18 @@
+# HyperFrames v0.7.66
+
+Released on 2026-07-21.
+
+Studio preview audio now plays at playback speeds above 1x instead of being silently muted, and the mute control stays usable at every speed. This release also fixes an engine worker frame-stride false-positive and lands a c2v skills mining pass with new blueprints and rules.
+
+## Features
+
+- **Skills:** C2v mining pass — 7 new blueprints, 10 new rules, compacted recipe corpus ([853256403](https://github.com/heygen-com/hyperframes/commit/853256403b3ffd3dc0b616785ab876b4c0f04a89), [#2680](https://github.com/heygen-com/hyperframes/pull/2680))
+
+## Fixes
+
+- **Studio:** Play preview audio at speeds above 1x ([07965e9fe](https://github.com/heygen-com/hyperframes/commit/07965e9fe93fc7b53dfe7c933f8abd0c4b10c86d), [#2691](https://github.com/heygen-com/hyperframes/pull/2691))
+- **Engine:** Carry frameStride onto WorkerResult (fixes interleaved worker false-positive) ([4f53dd4f2](https://github.com/heygen-com/hyperframes/commit/4f53dd4f2cd607de17b2d2329746fa5da0cadeaa))
+
+## Full changelog
+
+https://github.com/heygen-com/hyperframes/compare/v0.7.65...v0.7.66