QVAC-22367 fix[transcription-parakeet]: bound long-audio memory via windowed encoder

packages/transcription-parakeet/CHANGELOG.md

@@ -5,6 +5,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Long audio no longer crashes or exhausts memory during offline transcription.
+  The batch `transcribe` path ran the Parakeet encoder over the entire input in
+  one pass, whose self-attention grows with the square of the audio length, so
+  multi-hour files were killed by the OS (a ~90 min file peaked at ~100 GB). The
+  bundled `parakeet-cpp` (bumped to `2026-07-21#0`) now slides the encoder over
+  long inputs in overlapping windows with bounded memory; short inputs keep the
+  identical single-pass path. `transcribeStream` was already bounded and is
+  unchanged.
+
 ## [0.10.1] - 2026-07-20
 
 ### Changed

packages/transcription-parakeet/test/integration/sortformer-streaming-alias.test.js

@@ -62,8 +62,15 @@ test('ensureGgufForType(sortformer-streaming) resolves via the canonical env-key
   process.env[envKey] = sentinel
 
   t.teardown(() => {
-    if (previous === undefined) delete process.env[envKey]
-    else process.env[envKey] = previous
+    // Bare's process.env proxy rejects `delete` (deleteProperty returns false),
+    // which would abort the whole test process; best-effort unset instead.
+    if (previous === undefined) {
+      try {
+        delete process.env[envKey]
+      } catch (_) {}
+    } else {
+      process.env[envKey] = previous
+    }
     try {
       fs.unlinkSync(sentinel)
     } catch (_) {}

packages/transcription-parakeet/vcpkg.json

@@ -4,19 +4,19 @@
   "dependencies": [
     {
       "name": "parakeet-cpp",
-      "version>=": "2026-07-13#2",
+      "version>=": "2026-07-21",
       "features": ["metal"],
       "platform": "osx | ios"
     },
     {
       "name": "parakeet-cpp",
-      "version>=": "2026-07-13#2",
+      "version>=": "2026-07-21",
       "features": ["vulkan", "opencl"],
       "platform": "android"
     },
     {
       "name": "parakeet-cpp",
-      "version>=": "2026-07-13#2",
+      "version>=": "2026-07-21",
       "features": ["vulkan"],
       "platform": "!(osx | ios | android)"
     },