Set TRANSCRIBER=whisperx (default) or TRANSCRIBER=sous_chef to pick
the engine. Transcripts go to transcripts/<method>/ so results from
different engines coexist for comparison.

Assisted-by: Claude Opus 4.6 via pi

diff --git a/Rakefile b/Rakefile
index f05de8e..071cefe 100644
--- a/Rakefile
+++ b/Rakefile
@@ -7,12 +7,13 @@ require_relative "lib/download"
 CACHE_DIR = Pathname("cache")
 AUDIO_DIR = CACHE_DIR / "audio"
 TRANSCRIPTS_DIR = Pathname("transcripts")
+SOUS_CHEF = Pathname("sous_chef/.build/release/sous_chef")
 HRN_FEED = CACHE_DIR / "hrn_feed.xml"
 HRN_FEED_URL = "https://rss.art19.com/cooking-issues"
+TRANSCRIBER = ENV.fetch("TRANSCRIBER", "whisperx")
 
 directory CACHE_DIR.to_s
 directory AUDIO_DIR.to_s
-directory TRANSCRIPTS_DIR.to_s
 
 file HRN_FEED.to_s => CACHE_DIR.to_s do
   puts "Downloading HRN feed..."
@@ -23,25 +24,44 @@ file HRN_FEED.to_s => CACHE_DIR.to_s do
   HRN_FEED.write(response.body)
 end
 
+file SOUS_CHEF.to_s do
+  sh "cd sous_chef && swift build -c release"
+end
+
 Rake::Task[HRN_FEED.to_s].invoke
 
 EPISODES = CookingIssues::Feed.parse(HRN_FEED)
 
-EPISODES.values.each do |ep|
-  file ep.audio_path => AUDIO_DIR.to_s do
-    puts "Downloading #{ep.slug}..."
-    CookingIssues::Download.fetch(ep.audio_url, ep.audio_path)
-  end
-
-  file ep.transcript_path => [ep.audio_path, TRANSCRIPTS_DIR.to_s] do
+def transcribe(ep, audio_path, transcript_path)
+  case TRANSCRIBER
+  when "whisperx"
     hf_token = ENV.fetch("HUGGING_FACE_TOKEN") { abort "Set HUGGING_FACE_TOKEN for diarization." }
-    sh "whisperx", ep.audio_path,
+    sh "whisperx", audio_path,
       "--model", "large-v3",
       "--compute_type", "int8",
       "--device", "cpu",
       "--diarize", "--hf_token", hf_token,
-      "--output_dir", TRANSCRIPTS_DIR.to_s,
+      "--output_dir", File.dirname(transcript_path),
       "--output_format", "txt"
+  when "sous_chef"
+    Rake::Task[SOUS_CHEF.to_s].invoke
+    sh SOUS_CHEF.to_s, audio_path, transcript_path
+  else
+    abort "Unknown transcriber: #{TRANSCRIBER}. Use 'whisperx' or 'sous_chef'."
+  end
+end
+
+EPISODES.values.each do |ep|
+  transcript_dir = (TRANSCRIPTS_DIR / TRANSCRIBER).to_s
+  directory transcript_dir
+
+  file ep.audio_path => AUDIO_DIR.to_s do
+    puts "Downloading #{ep.slug}..."
+    CookingIssues::Download.fetch(ep.audio_url, ep.audio_path)
+  end
+
+  file ep.transcript_path(TRANSCRIBER) => [ep.audio_path, transcript_dir] do
+    transcribe(ep, ep.audio_path, ep.transcript_path(TRANSCRIBER))
   end
 end
 
@@ -53,14 +73,14 @@ desc "Download and transcribe all episodes"
 task :sync do
   # The feed is reverse-chronological; process oldest episodes first.
   EPISODES.values.sort_by(&:number).each do |ep|
-    Rake::Task[ep.transcript_path].invoke
+    Rake::Task[ep.transcript_path(TRANSCRIBER)].invoke
   end
 end
 
 desc "List all episodes from the feed"
 task :episodes do
   EPISODES.values.sort_by(&:number).each do |ep|
-    status = Pathname(ep.transcript_path).exist? ? "✓" : " "
+    status = Pathname(ep.transcript_path(TRANSCRIBER)).exist? ? "✓" : " "
     puts "[#{status}] #{ep.slug}  #{ep.title}"
   end
 end
@@ -72,7 +92,7 @@ task :transcribe, [:number] do |_t, args|
   ep = EPISODES[args[:number].to_i]
   abort "Episode #{args[:number]} not found in feed." unless ep
 
-  Rake::Task[ep.transcript_path].invoke
+  Rake::Task[ep.transcript_path(TRANSCRIBER)].invoke
 end
 
 desc "Re-transcribe an episode (e.g., rake retranscribe[42])"
@@ -82,7 +102,8 @@ task :retranscribe, [:number] do |_t, args|
   ep = EPISODES[args[:number].to_i]
   abort "Episode #{args[:number]} not found in feed." unless ep
 
-  Pathname(ep.transcript_path).delete if Pathname(ep.transcript_path).exist?
-  Rake::Task[ep.transcript_path].reenable
-  Rake::Task[ep.transcript_path].invoke
+  path = Pathname(ep.transcript_path(TRANSCRIBER))
+  path.delete if path.exist?
+  Rake::Task[ep.transcript_path(TRANSCRIBER)].reenable
+  Rake::Task[ep.transcript_path(TRANSCRIBER)].invoke
 end
diff --git a/lib/feed.rb b/lib/feed.rb
index 1465eb7..0c05623 100644
--- a/lib/feed.rb
+++ b/lib/feed.rb
@@ -20,8 +20,8 @@ module CookingIssues
       "cache/audio/#{slug}.mp3"
     end
 
-    def transcript_path
-      audio_path.pathmap("%{^cache/audio/,transcripts/}X.txt")
+    def transcript_path(method)
+      audio_path.pathmap("%{^cache/audio/,transcripts/#{method}/}X.txt")
     end
   end