v0.2.11 /relay/capabilities + /relay/transcribe-url (yt-dlp in container)

Dockerfile

@@ -1,9 +1,10 @@
 # ─────────────────────────────────────────────────────────
 #  Recap Relay — StartOS 0.4 Docker image
 #
-#  Includes: Node.js 20 only. No yt-dlp / ffmpeg / Python — the relay
-#  receives audio buffers from Recap clients and forwards to Gemini's
-#  File API; no local audio processing.
+#  Includes: Node.js 20 + yt-dlp + ffmpeg + Python. yt-dlp + ffmpeg are
+#  needed by the /relay/transcribe-url endpoint, which downloads
+#  YouTube / direct-audio URLs server-side so Recap clients don't have
+#  to ship the audio over their own (often slow) upstream.
 #
 #  Uses Debian slim for the same reason Recap does — pip-free, but
 #  pulled-in C deps from npm packages prefer glibc over musl.
@@ -32,10 +33,20 @@ WORKDIR /app
 # Runtime deps:
 #   - dumb-init: PID 1 signal handling
 #   - ca-certificates: HTTPS for Gemini + Keysat
+#   - python3 + pip: yt-dlp installation
+#   - ffmpeg: audio extraction (yt-dlp invokes it for -x)
+#   - curl: yt-dlp self-update fallback
 RUN apt-get update && apt-get install -y --no-install-recommends \
     dumb-init \
     ca-certificates \
-  && rm -rf /var/lib/apt/lists/*
+    curl \
+    python3 \
+    python3-pip \
+    python3-venv \
+    ffmpeg \
+  && rm -rf /var/lib/apt/lists/* \
+  && pip3 install --break-system-packages yt-dlp \
+  && yt-dlp --version
 
 # Copy installed deps + app code from builder
 COPY --from=builder /app/vendor ./vendor/