feat(talk): add ElevenLabs TTS voice notification package

- writeShellScriptBin with mpv audio + notify-send cancel button
- Simultaneous audio playback and notification popup
- VOICE_NOTIFY=0 toggle for disabling
- Uses eleven_multilingual_v2 model with configurable voice ID
- Cruncher job wrapper for task completion notifications

pkgs/default.nix

@@ -33,6 +33,7 @@ in {
   openwork = pkgs.callPackage ./openwork {};
   zellij-ps = pkgs.callPackage ./zellij-ps {};
   vibetyper = pkgs.callPackage ./vibetyper {};
+  talk = pkgs.callPackage ./talk {};
 
   # ── Pass-through packages ──────────────────────────────────────────
   # Imported directly from flake inputs. No local modifications.

pkgs/talk/default.nix

@@ -0,0 +1,113 @@
+{
+  lib,
+  stdenv,
+  writeShellScriptBin,
+  curl,
+  python3,
+  mpv,
+  libnotify,
+  busybox,
+}: let
+  script = writeShellScriptBin "talk" ''
+    #!/usr/bin/env bash
+    set -euo pipefail
+
+    # ── Toggle: VOICE_NOTIFY=0 deaktiviert alles ───────────────────
+    if [ "''${VOICE_NOTIFY:-1}" = "0" ]; then
+      exit 0
+    fi
+
+    # ── Config ──────────────────────────────────────────────────────
+    API_KEY="''${ELEVENLABS_API_KEY:?Set ELEVENLABS_API_KEY in your environment}"
+    VOICE_ID="''${ELEVENLABS_VOICE_ID:-KXxZd16DiBqt82nbarJx}"
+    TEXT="''${1:?Usage: talk \"Text zum Sprechen\"}"
+    AUDIO_FILE="/tmp/voice-notify-$$.mp3"
+    ACTION_FILE="/tmp/voice-action-$$"
+
+    CURL="${lib.getExe curl}"
+    PYTHON="${lib.getExe python3}"
+    MPV="${lib.getExe mpv}"
+    NOTIFY="${lib.getExe libnotify}"
+    RM="${busybox}/bin/rm"
+    CAT="${busybox}/bin/cat"
+    GREP="${busybox}/bin/grep"
+    SLEEP="${busybox}/bin/sleep"
+    KILL="${busybox}/bin/kill"
+    STAT="${busybox}/bin/stat"
+
+    trap '$RM -f "$AUDIO_FILE" "$ACTION_FILE"' EXIT
+
+    # ── TTS generieren ──────────────────────────────────────────────
+    PAYLOAD=$("$PYTHON" -c '
+    import json, sys
+    print(json.dumps({
+        "text": sys.argv[1],
+        "model_id": "eleven_multilingual_v2",
+        "voice_settings": {"stability": 0.5, "similarity_boost": 0.75}
+    }))
+    ' "$TEXT")
+
+    HTTP_CODE=$("$CURL" -s -o "$AUDIO_FILE" -w "%{http_code}" \
+      -X POST "https://api.elevenlabs.io/v1/text-to-speech/''${VOICE_ID}" \
+      -H "xi-api-key: ''${API_KEY}" \
+      -H "Content-Type: application/json" \
+      -d "$PAYLOAD") || HTTP_CODE="000"
+
+    if [ "$HTTP_CODE" != "200" ]; then
+      ERR=$($CAT "$AUDIO_FILE" 2>/dev/null | head -c 300)
+      $RM -f "$AUDIO_FILE"
+      "$NOTIFY" -u critical "❌ Voice Fehler" "HTTP ''${HTTP_CODE}\n''${ERR}"
+      exit 1
+    fi
+
+    # ── Gleichzeitig: Audio + Notification ──────────────────────────
+    "$MPV" --no-video --no-terminal --really-quiet "$AUDIO_FILE" &
+    MPV_PID=$!
+
+    (
+      exec "$NOTIFY" \
+        --action=cancel="⛔ Abbrechen" \
+        --urgency=normal \
+        --icon=audio-x-generic \
+        "🔊 KI Antwort" \
+        "$TEXT" > "$ACTION_FILE" 2>/dev/null
+    ) &
+    NOTIFY_PID=$!
+
+    # ── Poll-Loop ───────────────────────────────────────────────────
+    while true; do
+      if ! $KILL -0 "$MPV_PID" 2>/dev/null; then
+        $KILL "$NOTIFY_PID" 2>/dev/null || true
+        break
+      fi
+      if [ -f "$ACTION_FILE" ]; then
+        if $GREP -q "cancel" "$ACTION_FILE" 2>/dev/null; then
+          $KILL "$MPV_PID" 2>/dev/null || true
+        fi
+        break
+      fi
+      $SLEEP 0.2
+    done
+
+    wait "$MPV_PID" 2>/dev/null || true
+  '';
+in
+  stdenv.mkDerivation {
+    pname = "talk";
+    version = "0.1.0";
+
+    dontUnpack = true;
+
+    installPhase = ''
+      mkdir -p "$out/bin"
+      ln -s ${script}/bin/talk "$out/bin/talk"
+    '';
+
+    meta = with lib; {
+      description = "ElevenLabs TTS voice notifications with dismissable popup";
+      homepage = "https://code.m3ta.dev/m3tam3re/nixpkgs";
+      license = licenses.mit;
+      platforms = platforms.linux;
+      mainProgram = "talk";
+    };
+  }