adding a bunch of untested files

.gitignore

@@ -64,3 +64,13 @@ recordings/
 # Lock files (optional - uncomment if you want to track these)
 # uv.lock
 # flake.lock
+
+# Local config
+local.properties
+*.jar
+
+# Claude settings (local)
+.claude/
+
+# Data directories
+data/

clio-ai/real_time/.gitignore

@@ -0,0 +1,10 @@
+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv

clio-ai/real_time/.python-version

@@ -0,0 +1 @@
+3.13

clio-ai/real_time/collect_samples.sh

@@ -0,0 +1,154 @@
+#!/usr/bin/env bash
+
+# Training sample collection script for voice command classification
+# Creates organized recordings for wake word and category phrases
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+RECORDINGS_DIR="$SCRIPT_DIR/recordings"
+SAMPLE_RATE=16000
+DURATION=4
+
+# Categories
+declare -A CATEGORIES=(
+    ["wake_word"]="ok, note this"
+    ["pressure_below_15"]="eye pressure is less than 15"
+    ["pressure_15_to_25"]="eye pressure is 15 to 25"
+    ["pressure_25_to_35"]="eye pressure is 25 to 35"
+    ["pressure_above_35"]="eye pressure is greater than 35"
+    ["drop_l"]="L drop"
+    ["drop_p"]="P drop"
+    ["drop_d"]="D drop"
+    ["both_eyes"]="both eyes"
+)
+
+# Get Corsair mic source
+get_mic_source() {
+    wpctl status | grep -i "corsair" | grep -i "mono" | grep -oE '[0-9]+\.' | head -1 | tr -d '.'
+}
+
+# Create directory structure
+setup_dirs() {
+    for category in "${!CATEGORIES[@]}"; do
+        mkdir -p "$RECORDINGS_DIR/$category"
+    done
+    echo "Created recording directories in: $RECORDINGS_DIR"
+}
+
+# Count existing samples for a category
+count_samples() {
+    local category=$1
+    find "$RECORDINGS_DIR/$category" -name "*.wav" 2>/dev/null | wc -l
+}
+
+# Record a single sample
+record_sample() {
+    local category=$1
+    local voice_name=$2
+    local source_id=$3
+
+    local count=$(count_samples "$category")
+    local filename="${voice_name}_$(printf "%03d" $((count + 1))).wav"
+    local filepath="$RECORDINGS_DIR/$category/$filename"
+
+    echo ""
+    echo "Recording: $category"
+    echo "Say: \"${CATEGORIES[$category]}\""
+    echo ""
+    echo "Press ENTER to start recording (${DURATION}s)..."
+    read
+
+    echo ">>> RECORDING NOW - SPEAK! <<<"
+    pw-record --target "$source_id" --rate "$SAMPLE_RATE" --channels 1 --format s16 "$filepath" &
+    local pid=$!
+    sleep "$DURATION"
+    kill "$pid" 2>/dev/null
+    wait "$pid" 2>/dev/null
+
+    # Check audio level
+    local max_vol=$(ffmpeg -i "$filepath" -af "volumedetect" -f null /dev/null 2>&1 | grep "max_volume" | sed 's/.*max_volume: \([-0-9.]*\).*/\1/')
+
+    echo "Saved: $filename (max volume: ${max_vol} dB)"
+
+    if [ "${max_vol%.*}" -lt -50 ] 2>/dev/null; then
+        echo "WARNING: Recording seems quiet. Keep? [Y/n]"
+        read -r keep
+        if [[ "$keep" =~ ^[Nn] ]]; then
+            rm "$filepath"
+            echo "Deleted. Try again."
+            return 1
+        fi
+    fi
+    return 0
+}
+
+# Interactive recording session
+record_session() {
+    local source_id=$(get_mic_source)
+
+    if [ -z "$source_id" ]; then
+        echo "ERROR: Corsair mic not found"
+        exit 1
+    fi
+
+    echo "=== Voice Command Sample Collection ==="
+    echo "Mic source: $source_id"
+    echo ""
+
+    echo "Enter your name/voice identifier (e.g., 'john', 'sarah'):"
+    read -r voice_name
+    voice_name=${voice_name:-default}
+
+    while true; do
+        echo ""
+        echo "=== Current sample counts ==="
+        for category in "${!CATEGORIES[@]}"; do
+            local count=$(count_samples "$category")
+            echo "  $category: $count samples"
+        done
+
+        echo ""
+        echo "Select category to record:"
+        echo "  1) wake_word           - \"ok, note this\""
+        echo "  2) pressure_below_15   - \"eye pressure is less than 15\""
+        echo "  3) pressure_15_to_25   - \"eye pressure is 15 to 25\""
+        echo "  4) pressure_25_to_35   - \"eye pressure is 25 to 35\""
+        echo "  5) pressure_above_35   - \"eye pressure is greater than 35\""
+        echo "  6) drop_l              - \"L drop\""
+        echo "  7) drop_p              - \"P drop\""
+        echo "  8) drop_d              - \"D drop\""
+        echo "  9) both_eyes           - \"both eyes\""
+        echo "  a) Record ALL categories (one each)"
+        echo "  q) Quit"
+        echo ""
+        read -r choice
+
+        case $choice in
+            1) record_sample "wake_word" "$voice_name" "$source_id" ;;
+            2) record_sample "pressure_below_15" "$voice_name" "$source_id" ;;
+            3) record_sample "pressure_15_to_25" "$voice_name" "$source_id" ;;
+            4) record_sample "pressure_25_to_35" "$voice_name" "$source_id" ;;
+            5) record_sample "pressure_above_35" "$voice_name" "$source_id" ;;
+            6) record_sample "drop_l" "$voice_name" "$source_id" ;;
+            7) record_sample "drop_p" "$voice_name" "$source_id" ;;
+            8) record_sample "drop_d" "$voice_name" "$source_id" ;;
+            9) record_sample "both_eyes" "$voice_name" "$source_id" ;;
+            a|A)
+                for category in wake_word pressure_below_15 pressure_15_to_25 pressure_25_to_35 pressure_above_35 drop_l drop_p drop_d both_eyes; do
+                    record_sample "$category" "$voice_name" "$source_id"
+                done
+                ;;
+            q|Q)
+                echo "Done. Total samples collected:"
+                for category in "${!CATEGORIES[@]}"; do
+                    echo "  $category: $(count_samples "$category")"
+                done
+                exit 0
+                ;;
+            *) echo "Invalid choice" ;;
+        esac
+    done
+}
+
+# Main
+setup_dirs
+record_session

clio-ai/real_time/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1778443072,
+        "narHash": "sha256-zi7/fsqM/kFdNuED//4WOCUtezGtKKqRNORjMvfwjnA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "da5ad661ba4e5ef59ba743f0d112cbc30e474f32",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

clio-ai/real_time/flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "Voice-activated eye pressure classifier";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+          config.cudaSupport = true;
+        };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # Python and uv
+            python313
+            uv
+
+            # Audio
+            portaudio
+            pipewire
+            alsa-lib
+            ffmpeg
+
+            # CUDA (for faster-whisper)
+            cudaPackages.cudatoolkit
+            cudaPackages.cudnn
+
+            # SSL certificates
+            cacert
+
+            # Text-to-speech
+            espeak-ng
+          ];
+
+          shellHook = ''
+            export LD_LIBRARY_PATH="${pkgs.lib.makeLibraryPath [
+              pkgs.portaudio
+              pkgs.pipewire
+              pkgs.alsa-lib
+              pkgs.cudaPackages.cudatoolkit
+              pkgs.cudaPackages.cudnn
+            ]}:/run/opengl-driver/lib:$LD_LIBRARY_PATH"
+
+            export SSL_CERT_FILE="${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt"
+            export REQUESTS_CA_BUNDLE="$SSL_CERT_FILE"
+
+            echo "Voice classifier dev environment"
+            echo "Run: uv run python listener.py"
+          '';
+        };
+      }
+    );
+}

clio-ai/real_time/listener.py

@@ -0,0 +1,562 @@
+#!/usr/bin/env python3
+"""
+Voice-activated eye pressure classifier.
+
+Listens for wake word "ok, note this" then classifies the following speech
+into eye pressure categories.
+
+Uses two classification methods:
+1. Transcription + regex pattern matching (fallback)
+2. Audio embeddings + trained classifier (primary, if available)
+
+Usage:
+    uv run python listener.py [--model large-v3] [--device cuda]
+"""
+
+import argparse
+import collections
+import pickle
+import queue
+import re
+import subprocess
+import sys
+import time
+from pathlib import Path
+
+import numpy as np
+import sounddevice as sd
+import torch
+import webrtcvad
+
+# Lazy imports for faster startup feedback
+whisper_model = None
+embedding_model = None
+classifier_data = None
+
+SCRIPT_DIR = Path(__file__).parent
+CLASSIFIER_PATH = SCRIPT_DIR / "classifier.pkl"
+
+# Categories with regex patterns for matching
+CATEGORIES = {
+    "pressure_below_15": [
+        r"(less\s+than|under|below)\s*15",
+        r"<\s*15",
+        r"15.*less",
+    ],
+    "pressure_15_to_25": [
+        r"15\s*(to|through|-)\s*25",
+        r"between\s*15\s*(and|to)\s*25",
+    ],
+    "pressure_25_to_35": [
+        r"25\s*(to|through|-)\s*35",
+        r"between\s*25\s*(and|to)\s*35",
+    ],
+    "pressure_above_35": [
+        r"(greater\s+than|over|above|more\s+than)\s*35",
+        r">\s*35",
+        r"35.*more",
+    ],
+    "drop_l": [
+        r"\bl\s*drop",
+        r"drop\s*l\b",
+        r"\bell\s*drop",
+    ],
+    "drop_p": [
+        r"\bp\s*drop",
+        r"drop\s*p\b",
+        r"\bpee\s*drop",
+    ],
+    "drop_d": [
+        r"\bd\s*drop",
+        r"drop\s*d\b",
+        r"\bdee\s*drop",
+    ],
+    "both_eyes": [
+        r"both\s*eyes",
+        r"both\s*i",
+    ],
+}
+
+WAKE_PHRASES = [
+    r"ok[,.]?\s*note\s+this",
+    r"okay[,.]?\s*note\s+this",
+    r"o\.?k\.?\s*note\s+this",
+    # Common mis-transcriptions
+    r"ok[,.]?\s*notice",
+    r"okay[,.]?\s*notice",
+    r"ok[,.]?\s*noted",
+    r"okay[,.]?\s*noted",
+    r"ok[,.]?\s*no\s+this",
+    r"okay[,.]?\s*no\s+this",
+    r"ok[,.]?\s*not\s+this",
+    r"okay[,.]?\s*not\s+this",
+]
+
+CONFIRM_YES = [
+    r"\byes\b", r"\byeah\b", r"\byep\b", r"\byup\b",
+    r"\bcorrect\b", r"\bright\b", r"\bconfirm\b",
+    r"\bsave\b", r"\bok\b", r"\bokay\b",
+]
+
+CONFIRM_NO = [
+    r"\bno\b", r"\bnope\b", r"\bnah\b",
+    r"\bwrong\b", r"\bcancel\b", r"\bdelete\b",
+    r"\bdiscard\b", r"\bredo\b",
+]
+
+# Spoken responses for each category
+CATEGORY_RESPONSES = {
+    "pressure_below_15": "Eye pressure below 15",
+    "pressure_15_to_25": "Eye pressure 15 to 25",
+    "pressure_25_to_35": "Eye pressure 25 to 35",
+    "pressure_above_35": "Eye pressure above 35",
+    "drop_l": "L drop",
+    "drop_p": "P drop",
+    "drop_d": "D drop",
+    "both_eyes": "Both eyes",
+}
+
+SAMPLE_RATE = 16000
+FRAME_DURATION_MS = 30  # webrtcvad frame size
+FRAME_SIZE = int(SAMPLE_RATE * FRAME_DURATION_MS / 1000)
+SPEECH_PADDING_MS = 300  # padding around speech
+NUM_PADDING_FRAMES = SPEECH_PADDING_MS // FRAME_DURATION_MS
+
+
+def speak(text: str):
+    """Speak text using available TTS."""
+    # Try espeak-ng, then espeak, then piper
+    for cmd in [
+        ["espeak-ng", "-v", "en-us", "-s", "150", text],
+        ["espeak", "-v", "en-us", "-s", "150", text],
+    ]:
+        try:
+            result = subprocess.run(cmd, capture_output=True, timeout=10)
+            if result.returncode == 0:
+                return
+        except FileNotFoundError:
+            continue
+        except Exception as e:
+            print(f"  TTS error: {e}")
+            return
+
+    # Fallback: use ffmpeg to generate speech-like notification
+    print(f"  (TTS unavailable - install espeak-ng)")
+
+
+def beep():
+    """Play a short beep tone."""
+    try:
+        # Generate a 100ms 800Hz beep
+        subprocess.run(
+            ["ffplay", "-nodisp", "-autoexit", "-f", "lavfi", "-i",
+             "sine=frequency=800:duration=0.1", "-loglevel", "quiet"],
+            capture_output=True,
+            timeout=2
+        )
+    except Exception:
+        pass  # Silent fail
+
+
+def get_corsair_device():
+    """Find Corsair microphone device index."""
+    devices = sd.query_devices()
+    for i, dev in enumerate(devices):
+        if "corsair" in dev["name"].lower() and dev["max_input_channels"] > 0:
+            return i
+    return None
+
+
+def load_whisper(model_name: str, device: str):
+    """Load faster-whisper model."""
+    global whisper_model
+    if whisper_model is None:
+        from faster_whisper import WhisperModel
+        print(f"Loading Whisper model '{model_name}' on {device}...")
+        compute_type = "float16" if device == "cuda" else "int8"
+        whisper_model = WhisperModel(model_name, device=device, compute_type=compute_type)
+        print("  Whisper loaded.")
+    return whisper_model
+
+
+def load_embedding_model(device: str):
+    """Load wav2vec2 model for embeddings."""
+    global embedding_model
+    if embedding_model is None:
+        from torchaudio.pipelines import WAV2VEC2_BASE
+        print(f"Loading wav2vec2 on {device}...")
+        bundle = WAV2VEC2_BASE
+        embedding_model = bundle.get_model().to(device)
+        embedding_model.eval()
+        print("  wav2vec2 loaded.")
+    return embedding_model
+
+
+def load_classifier():
+    """Load trained classifier if available."""
+    global classifier_data
+    if classifier_data is None and CLASSIFIER_PATH.exists():
+        print(f"Loading classifier from {CLASSIFIER_PATH}...")
+        with open(CLASSIFIER_PATH, 'rb') as f:
+            classifier_data = pickle.load(f)
+        print(f"  Classifier loaded. Categories: {list(classifier_data['label_encoder'].classes_)}")
+    return classifier_data
+
+
+def transcribe(audio: np.ndarray, model) -> str:
+    """Transcribe audio to text."""
+    segments, _ = model.transcribe(audio, language="en", beam_size=5)
+    return " ".join(seg.text for seg in segments).strip().lower()
+
+
+def extract_embedding(audio: np.ndarray, model, device: str) -> np.ndarray:
+    """Extract embedding from audio using wav2vec2."""
+    with torch.no_grad():
+        # Convert to torch tensor
+        waveform = torch.from_numpy(audio).unsqueeze(0).to(device)
+        features, _ = model.extract_features(waveform)
+        # Use the last layer's features, averaged over time
+        embedding = features[-1].mean(dim=1).cpu().numpy()
+    return embedding.flatten()
+
+
+def classify_with_embedding(audio: np.ndarray, emb_model, classifier, device: str) -> tuple[str, float]:
+    """Classify audio using embedding + trained classifier."""
+    embedding = extract_embedding(audio, emb_model, device)
+    embedding = embedding.reshape(1, -1)
+
+    probs = classifier['classifier'].predict_proba(embedding)[0]
+    pred_idx = probs.argmax()
+    confidence = probs[pred_idx]
+    category = classifier['label_encoder'].inverse_transform([pred_idx])[0]
+
+    return category, confidence
+
+
+def check_wake_word(text: str) -> bool:
+    """Check if text contains wake phrase."""
+    for pattern in WAKE_PHRASES:
+        if re.search(pattern, text, re.IGNORECASE):
+            return True
+    return False
+
+
+def check_confirmation(text: str) -> str | None:
+    """Check if text is a yes/no confirmation. Returns 'yes', 'no', or None."""
+    for pattern in CONFIRM_YES:
+        if re.search(pattern, text, re.IGNORECASE):
+            return "yes"
+    for pattern in CONFIRM_NO:
+        if re.search(pattern, text, re.IGNORECASE):
+            return "no"
+    return None
+
+
+def log_recording(log_file: str, category: str, timestamp: str):
+    """Append confirmed recording to log file."""
+    import csv
+    import os
+
+    file_exists = os.path.exists(log_file)
+    with open(log_file, 'a', newline='') as f:
+        writer = csv.writer(f)
+        if not file_exists:
+            writer.writerow(['timestamp', 'category'])
+        writer.writerow([timestamp, category])
+
+
+def classify_category(text: str) -> str | None:
+    """Classify text into a category. Returns None if no match."""
+    for category, patterns in CATEGORIES.items():
+        for pattern in patterns:
+            if re.search(pattern, text, re.IGNORECASE):
+                return category
+    return None
+
+
+def classify_text(text: str) -> tuple[str | None, str | None]:
+    """
+    Check for wake word and classify category from transcription.
+    Returns (category, text) or (None, None) if no wake word.
+    """
+    if not check_wake_word(text):
+        return None, None
+
+    category = classify_category(text)
+    return category if category else "unknown", text
+
+
+class VoiceActivityDetector:
+    """VAD-based speech segmentation."""
+
+    def __init__(self, aggressiveness: int = 2):
+        self.vad = webrtcvad.Vad(aggressiveness)
+        self.ring_buffer = collections.deque(maxlen=NUM_PADDING_FRAMES)
+        self.triggered = False
+        self.voiced_frames = []
+
+    def process_frame(self, frame: bytes) -> np.ndarray | None:
+        """
+        Process a frame of audio.
+        Returns complete utterance when speech ends, None otherwise.
+        """
+        is_speech = self.vad.is_speech(frame, SAMPLE_RATE)
+
+        if not self.triggered:
+            self.ring_buffer.append((frame, is_speech))
+            num_voiced = sum(1 for _, speech in self.ring_buffer if speech)
+
+            if num_voiced > 0.9 * self.ring_buffer.maxlen:
+                self.triggered = True
+                self.voiced_frames = [f for f, _ in self.ring_buffer]
+                self.ring_buffer.clear()
+        else:
+            self.voiced_frames.append(frame)
+            self.ring_buffer.append((frame, is_speech))
+            num_unvoiced = sum(1 for _, speech in self.ring_buffer if not speech)
+
+            if num_unvoiced > 0.9 * self.ring_buffer.maxlen:
+                self.triggered = False
+                audio_bytes = b"".join(self.voiced_frames)
+                self.voiced_frames = []
+                self.ring_buffer.clear()
+
+                # Convert to numpy array
+                audio = np.frombuffer(audio_bytes, dtype=np.int16).astype(np.float32) / 32768.0
+                return audio
+
+        return None
+
+
+def audio_callback(indata, frames, time_info, status, audio_queue):
+    """Callback for audio stream."""
+    if status:
+        print(f"Audio status: {status}", file=sys.stderr)
+    audio_queue.put(bytes(indata))
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Voice-activated eye pressure classifier")
+    parser.add_argument("--model", default="base.en", help="Whisper model name")
+    parser.add_argument("--device", default="cuda", choices=["cuda", "cpu"], help="Compute device")
+    parser.add_argument("--list-devices", action="store_true", help="List audio devices and exit")
+    parser.add_argument("--no-classifier", action="store_true", help="Disable embedding classifier")
+    parser.add_argument("--confidence-threshold", type=float, default=0.6,
+                        help="Minimum confidence for embedding classifier (default: 0.6)")
+    parser.add_argument("--wake-timeout", type=float, default=5.0,
+                        help="Seconds to wait for command after wake word (default: 5.0)")
+    parser.add_argument("--confirm", action="store_true",
+                        help="Require yes/no confirmation before saving")
+    parser.add_argument("--log-file", type=str, default="recordings_log.csv",
+                        help="File to log confirmed recordings (default: recordings_log.csv)")
+    args = parser.parse_args()
+
+    if args.list_devices:
+        print(sd.query_devices())
+        return
+
+    # Find microphone
+    mic_device = get_corsair_device()
+    if mic_device is None:
+        print("Corsair microphone not found. Available devices:")
+        print(sd.query_devices())
+        sys.exit(1)
+
+    print(f"Using microphone: {sd.query_devices(mic_device)['name']}")
+    print()
+
+    # Load models
+    whisper = load_whisper(args.model, args.device)
+
+    # Load embedding classifier if available
+    classifier = None
+    emb_model = None
+    if not args.no_classifier:
+        classifier = load_classifier()
+        if classifier:
+            emb_model = load_embedding_model(args.device)
+        else:
+            print("  No classifier found. Run train_classifier.py after collecting samples.")
+
+    print()
+
+    # Setup VAD and audio queue
+    vad = VoiceActivityDetector(aggressiveness=2)
+    audio_queue = queue.Queue()
+
+    print("=" * 60)
+    print("Listening for: \"Ok, note this\"")
+    print("Then say your command (can pause between wake word and command)")
+    print("Commands: pressure <15 / 15-25 / 25-35 / >35, L/P/D drop, both eyes")
+    if classifier:
+        print(f"Using embedding classifier (confidence threshold: {args.confidence_threshold})")
+    else:
+        print("Using transcription-only mode")
+    if args.confirm:
+        print("Confirmation mode: say 'yes' to save, 'no' to discard")
+    print("Press Ctrl+C to stop")
+    print("=" * 60)
+    print()
+
+    # State machine: idle -> awaiting_command -> (awaiting_confirmation) -> idle
+    state = "idle"
+    state_time = 0
+    pending_category = None
+
+    def do_classification(utterance, text, use_embedding=True):
+        """Classify utterance. Returns (category, method) or (None, None)."""
+        final_category = None
+        method_used = None
+
+        # Try embedding classifier first
+        if use_embedding and classifier and emb_model:
+            start = time.time()
+            emb_category, confidence = classify_with_embedding(
+                utterance, emb_model, classifier, args.device
+            )
+            emb_time = time.time() - start
+
+            print(f"  Embedding: {emb_category} ({confidence:.1%}) [{emb_time:.2f}s]")
+
+            if confidence >= args.confidence_threshold:
+                final_category = emb_category
+                method_used = f"embedding ({confidence:.1%})"
+            else:
+                print(f"  Low confidence, trying transcription")
+
+        # Fall back to transcription
+        if final_category is None:
+            text_category = classify_category(text)
+            if text_category:
+                final_category = text_category
+                method_used = "transcription"
+
+        return final_category, method_used
+
+    def announce_classification(category, method, ask_confirm=False):
+        """Announce the classification result."""
+        response = CATEGORY_RESPONSES.get(category, category)
+        print()
+        print(f"  >>> {response} <<< (via {method})")
+        print()
+        if ask_confirm:
+            speak(f"{response}, correct?")
+        else:
+            speak(response)
+        return response
+
+    def save_recording(category):
+        """Save the confirmed recording."""
+        from datetime import datetime
+        timestamp = datetime.now().isoformat()
+        log_recording(args.log_file, category, timestamp)
+        print(f"  Saved to {args.log_file}")
+        beep()
+
+    try:
+        with sd.RawInputStream(
+            samplerate=SAMPLE_RATE,
+            blocksize=FRAME_SIZE,
+            device=mic_device,
+            dtype="int16",
+            channels=1,
+            callback=lambda *a: audio_callback(*a, audio_queue),
+        ):
+            while True:
+                frame = audio_queue.get()
+
+                # Check for timeouts
+                if state != "idle" and (time.time() - state_time) > args.wake_timeout:
+                    print("  (timeout)")
+                    print()
+                    state = "idle"
+                    pending_category = None
+
+                utterance = vad.process_frame(frame)
+
+                if utterance is not None and len(utterance) > SAMPLE_RATE * 0.5:  # At least 0.5s
+                    print("Processing speech...", end=" ", flush=True)
+
+                    # Transcribe
+                    start = time.time()
+                    text = transcribe(utterance, whisper)
+                    transcribe_time = time.time() - start
+
+                    print(f"({transcribe_time:.2f}s)")
+                    print(f"  Heard: \"{text}\"")
+
+                    # State: awaiting confirmation
+                    if state == "awaiting_confirmation":
+                        confirmation = check_confirmation(text)
+                        if confirmation == "yes":
+                            print("  Confirmed!")
+                            save_recording(pending_category)
+                        elif confirmation == "no":
+                            print("  Discarded.")
+                            beep()
+                        else:
+                            print("  Say 'yes' to save or 'no' to discard")
+                            state_time = time.time()  # Reset timeout
+                            print()
+                            continue
+                        state = "idle"
+                        pending_category = None
+                        print()
+                        continue
+
+                    # State: awaiting command
+                    if state == "awaiting_command":
+                        category, method = do_classification(utterance, text)
+                        if category:
+                            announce_classification(category, method, ask_confirm=args.confirm)
+                            if args.confirm:
+                                print("  Say 'yes' to save, 'no' to discard")
+                                state = "awaiting_confirmation"
+                                state_time = time.time()
+                                pending_category = category
+                            else:
+                                save_recording(category)
+                                state = "idle"
+                        else:
+                            print("  Could not classify. Try again.")
+                            state_time = time.time()  # Reset timeout
+                        print()
+                        continue
+
+                    # State: idle - check for wake word
+                    has_wake = check_wake_word(text)
+
+                    if not has_wake:
+                        print("  (no wake word detected)")
+                        print()
+                        continue
+
+                    print("  Wake word detected!")
+
+                    # Try to classify in same utterance
+                    category, method = do_classification(utterance, text)
+                    if category:
+                        announce_classification(category, method, ask_confirm=args.confirm)
+                        if args.confirm:
+                            print("  Say 'yes' to save, 'no' to discard")
+                            state = "awaiting_confirmation"
+                            state_time = time.time()
+                            pending_category = category
+                        else:
+                            save_recording(category)
+                        print()
+                        continue
+
+                    # No category found - wait for next utterance
+                    print("  Listening for command...")
+                    beep()
+                    state = "awaiting_command"
+                    state_time = time.time()
+                    print()
+
+    except KeyboardInterrupt:
+        print("\nStopped.")
+
+
+if __name__ == "__main__":
+    main()

clio-ai/real_time/main.py

@@ -0,0 +1,6 @@
+def main():
+    print("Hello from real-time!")
+
+
+if __name__ == "__main__":
+    main()

clio-ai/real_time/pyproject.toml

@@ -0,0 +1,16 @@
+[project]
+name = "real-time"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.13"
+dependencies = [
+    "faster-whisper>=1.2.1",
+    "numpy>=2.4.4",
+    "scikit-learn>=1.8.0",
+    "scipy>=1.17.1",
+    "sounddevice>=0.5.5",
+    "torch>=2.12.0",
+    "torchaudio>=2.11.0",
+    "webrtcvad>=2.0.10",
+]

clio-ai/real_time/run_listener.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+cd "$(dirname "$0")"
+exec nix develop --command uv run python listener.py "$@"

clio-ai/real_time/test_corsair_mic.sh

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+
+# Test script for Corsair VOID ELITE Wireless microphone
+# Uses PipeWire for audio capture
+
+OUTPUT_FILE="test_recording.wav"
+DURATION=5
+
+echo "=== Corsair VOID ELITE Microphone Test ==="
+echo ""
+
+# Get the Corsair source ID
+CORSAIR_SOURCE=$(wpctl status | grep -i "corsair" | grep -i "mono" | grep -oE '[0-9]+\.' | head -1 | tr -d '.')
+
+if [ -z "$CORSAIR_SOURCE" ]; then
+    echo "ERROR: Corsair microphone not found in PipeWire sources"
+    wpctl status | grep -A5 "Sources:"
+    exit 1
+fi
+
+echo "Found Corsair mic: Source ID $CORSAIR_SOURCE"
+echo "Duration: ${DURATION} seconds"
+echo ""
+echo "Speak into your Corsair headset microphone..."
+echo ""
+
+# Record using pw-record
+pw-record --target "$CORSAIR_SOURCE" --rate 48000 --channels 1 --format s16 "$OUTPUT_FILE" &
+PW_PID=$!
+
+sleep "$DURATION"
+kill "$PW_PID" 2>/dev/null
+wait "$PW_PID" 2>/dev/null
+
+if [ -f "$OUTPUT_FILE" ]; then
+    echo ""
+    echo "=== Recording complete ==="
+    echo "Saved to: $OUTPUT_FILE"
+    echo ""
+
+    # Show file info
+    echo "File info:"
+    ffprobe -hide_banner "$OUTPUT_FILE" 2>&1 | grep -E "Duration|Stream"
+
+    # Check if there's actual audio (not silence)
+    echo ""
+    echo "Audio levels:"
+    ffmpeg -i "$OUTPUT_FILE" -af "volumedetect" -f null /dev/null 2>&1 | grep -E "max_volume|mean_volume"
+
+    MAX_VOL=$(ffmpeg -i "$OUTPUT_FILE" -af "volumedetect" -f null /dev/null 2>&1 | grep "max_volume" | sed 's/.*max_volume: \([-0-9.]*\).*/\1/')
+
+    echo ""
+    # Check if max volume is greater than -50 dB (audible)
+    if [ "$(echo "$MAX_VOL" | cut -d. -f1)" -gt -50 ] 2>/dev/null; then
+        echo "SUCCESS: Audio detected! Max volume: ${MAX_VOL} dB"
+    else
+        echo "WARNING: Very quiet or silent recording (${MAX_VOL} dB)"
+        echo ""
+        echo "Possible causes:"
+        echo "  - Mic mute button on headset is ON (flip the switch!)"
+        echo "  - Headset is not being worn / mic boom is retracted"
+        echo "  - Volume too low in system settings"
+    fi
+
+    echo ""
+    echo "To play back: ffplay -nodisp -autoexit $OUTPUT_FILE"
+else
+    echo ""
+    echo "=== Recording FAILED ==="
+    exit 1
+fi

clio-ai/real_time/train_classifier.py

@@ -0,0 +1,191 @@
+#!/usr/bin/env python3
+"""
+Train an audio embedding classifier on recorded samples.
+
+Uses wav2vec2 to extract embeddings, then trains a simple classifier.
+
+Usage:
+    uv run python train_classifier.py
+"""
+
+import pickle
+from pathlib import Path
+
+import numpy as np
+import torch
+from scipy.io import wavfile
+from torchaudio.pipelines import WAV2VEC2_BASE
+
+RECORDINGS_DIR = Path(__file__).parent / "recordings"
+MODEL_PATH = Path(__file__).parent / "classifier.pkl"
+SAMPLE_RATE = 16000
+
+# Categories (excluding wake_word which is handled separately)
+CATEGORIES = [
+    "pressure_below_15",
+    "pressure_15_to_25",
+    "pressure_25_to_35",
+    "pressure_above_35",
+    "drop_l",
+    "drop_p",
+    "drop_d",
+    "both_eyes",
+]
+
+
+def load_audio(path: Path) -> torch.Tensor:
+    """Load and preprocess audio file."""
+    sr, data = wavfile.read(path)
+
+    # Convert to float32
+    if data.dtype == np.int16:
+        data = data.astype(np.float32) / 32768.0
+    elif data.dtype == np.int32:
+        data = data.astype(np.float32) / 2147483648.0
+    elif data.dtype != np.float32:
+        data = data.astype(np.float32)
+
+    # Convert to mono if stereo
+    if len(data.shape) > 1:
+        data = data.mean(axis=1)
+
+    # Resample if needed
+    if sr != SAMPLE_RATE:
+        from scipy import signal
+        num_samples = int(len(data) * SAMPLE_RATE / sr)
+        data = signal.resample(data, num_samples)
+
+    # Convert to torch tensor with batch dimension
+    waveform = torch.from_numpy(data).unsqueeze(0)
+    return waveform
+
+
+def extract_embedding(waveform: torch.Tensor, model, device: str) -> np.ndarray:
+    """Extract embedding from audio using wav2vec2."""
+    with torch.no_grad():
+        waveform = waveform.to(device)
+        features, _ = model.extract_features(waveform)
+        # Use the last layer's features, averaged over time
+        embedding = features[-1].mean(dim=1).cpu().numpy()
+    return embedding.flatten()
+
+
+def load_samples():
+    """Load all training samples."""
+    samples = []
+    labels = []
+
+    for category in CATEGORIES:
+        category_dir = RECORDINGS_DIR / category
+        if not category_dir.exists():
+            print(f"Warning: {category_dir} does not exist")
+            continue
+
+        wav_files = list(category_dir.glob("*.wav"))
+        print(f"  {category}: {len(wav_files)} samples")
+
+        for wav_file in wav_files:
+            samples.append(wav_file)
+            labels.append(category)
+
+    return samples, labels
+
+
+def main():
+    print("=== Training Audio Classifier ===\n")
+
+    # Check for samples
+    if not RECORDINGS_DIR.exists():
+        print(f"Error: {RECORDINGS_DIR} does not exist")
+        print("Run ./collect_samples.sh first to record training samples")
+        return
+
+    print("Loading samples...")
+    sample_paths, labels = load_samples()
+
+    if len(sample_paths) == 0:
+        print("\nNo samples found. Run ./collect_samples.sh first.")
+        return
+
+    if len(set(labels)) < 2:
+        print(f"\nNeed samples from at least 2 categories. Found: {set(labels)}")
+        return
+
+    print(f"\nTotal: {len(sample_paths)} samples across {len(set(labels))} categories")
+
+    # Check minimum samples per category
+    from collections import Counter
+    counts = Counter(labels)
+    min_samples = min(counts.values())
+    if min_samples < 3:
+        print(f"\nWarning: Some categories have < 3 samples. More samples = better accuracy.")
+
+    # Load model
+    device = "cuda" if torch.cuda.is_available() else "cpu"
+    print(f"\nLoading wav2vec2 on {device}...")
+    bundle = WAV2VEC2_BASE
+    model = bundle.get_model().to(device)
+    model.eval()
+
+    # Extract embeddings
+    print("Extracting embeddings...")
+    embeddings = []
+    valid_labels = []
+
+    for i, (path, label) in enumerate(zip(sample_paths, labels)):
+        try:
+            waveform = load_audio(path)
+            embedding = extract_embedding(waveform, model, device)
+            embeddings.append(embedding)
+            valid_labels.append(label)
+            print(f"  [{i+1}/{len(sample_paths)}] {path.name}")
+        except Exception as e:
+            print(f"  [{i+1}/{len(sample_paths)}] {path.name} - ERROR: {e}")
+
+    if len(embeddings) < 2:
+        print("\nNot enough valid samples to train.")
+        return
+
+    X = np.array(embeddings)
+    y = np.array(valid_labels)
+
+    print(f"\nEmbedding shape: {X.shape}")
+
+    # Train classifier
+    print("\nTraining classifier...")
+    from sklearn.preprocessing import LabelEncoder
+    from sklearn.svm import SVC
+    from sklearn.model_selection import cross_val_score
+
+    label_encoder = LabelEncoder()
+    y_encoded = label_encoder.fit_transform(y)
+
+    # Use SVM with probability estimates
+    classifier = SVC(kernel='rbf', probability=True, C=1.0)
+
+    # Cross-validation if enough samples
+    if len(X) >= 4:
+        n_splits = min(5, len(X))
+        scores = cross_val_score(classifier, X, y_encoded, cv=n_splits)
+        print(f"Cross-validation accuracy: {scores.mean():.2%} (+/- {scores.std()*2:.2%})")
+
+    # Train on all data
+    classifier.fit(X, y_encoded)
+
+    # Save model
+    model_data = {
+        'classifier': classifier,
+        'label_encoder': label_encoder,
+        'categories': CATEGORIES,
+    }
+
+    with open(MODEL_PATH, 'wb') as f:
+        pickle.dump(model_data, f)
+
+    print(f"\nClassifier saved to: {MODEL_PATH}")
+    print(f"Categories: {list(label_encoder.classes_)}")
+    print("\nDone! The listener will now use this classifier.")
+
+
+if __name__ == "__main__":
+    main()

clio-ai/transcription/.gitignore

@@ -0,0 +1,10 @@
+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv

clio-ai/transcription/.python-version

@@ -0,0 +1 @@
+3.13

clio-ai/transcription/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1777954456,
+        "narHash": "sha256-hGdgeU2Nk87RAuZyYjyDjFL6LK7dAZN5RE9+hrDTkDU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "549bd84d6279f9852cae6225e372cc67fb91a4c1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

clio-ai/transcription/flake.nix

@@ -0,0 +1,46 @@
+{
+  description = "Audio transcription with faster-whisper (local models only)";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+
+        pythonEnv = pkgs.python313.withPackages (ps: with ps; [
+          pip
+        ]);
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            pythonEnv
+            uv
+            ffmpeg
+            zlib
+            stdenv.cc.cc.lib
+          ];
+
+          shellHook = ''
+            export LD_LIBRARY_PATH="${pkgs.lib.makeLibraryPath [
+              pkgs.zlib
+              pkgs.stdenv.cc.cc.lib
+              pkgs.ffmpeg
+            ]}:$LD_LIBRARY_PATH"
+
+            # Ensure venv exists
+            if [ ! -d .venv ]; then
+              uv venv
+            fi
+
+            echo "Transcription environment ready."
+            echo "Run: uv run python transcribe.py /path/to/recordings"
+          '';
+        };
+      }
+    );
+}

clio-ai/transcription/main.py

@@ -0,0 +1,6 @@
+def main():
+    print("Hello from view-recordings!")
+
+
+if __name__ == "__main__":
+    main()

clio-ai/transcription/pyproject.toml

@@ -0,0 +1,10 @@
+[project]
+name = "view-recordings"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.13"
+dependencies = [
+    "faster-whisper>=1.2.1",
+    "openai-whisper>=20250625",
+]

clio-ai/transcription/transcribe.py

@@ -0,0 +1,187 @@
+#!/usr/bin/env python3
+"""
+Transcribe audio recordings using Whisper models via faster-whisper.
+
+For Chromebook (CPU-only): Uses 'tiny' or 'base' models which run reasonably fast.
+For GPU (3090): Can use 'large-v3' for best quality.
+"""
+
+import argparse
+import json
+import os
+import sys
+from datetime import timedelta
+from pathlib import Path
+
+
+def format_timestamp(seconds: float) -> str:
+    """Convert seconds to HH:MM:SS.mmm format."""
+    td = timedelta(seconds=seconds)
+    hours, remainder = divmod(td.seconds, 3600)
+    minutes, secs = divmod(remainder, 60)
+    return f"{hours:02d}:{minutes:02d}:{secs:02d}.{int(td.microseconds/1000):03d}"
+
+
+def transcribe_file(model, audio_path: Path, output_dir: Path, verbose: bool = False):
+    """Transcribe a single audio file and save results."""
+    print(f"\nTranscribing: {audio_path.name}")
+
+    segments, info = model.transcribe(
+        str(audio_path),
+        beam_size=5,
+        vad_filter=True,  # Filter out non-speech sections
+        vad_parameters=dict(
+            min_silence_duration_ms=500,
+            speech_pad_ms=200,
+        ),
+    )
+
+    print(f"  Detected language: {info.language} (probability: {info.language_probability:.2f})")
+    print(f"  Duration: {info.duration:.1f}s")
+
+    # Collect all segments
+    results = []
+    full_text = []
+
+    for segment in segments:
+        results.append({
+            "start": segment.start,
+            "end": segment.end,
+            "text": segment.text.strip(),
+        })
+        full_text.append(segment.text.strip())
+
+        if verbose:
+            print(f"  [{format_timestamp(segment.start)} -> {format_timestamp(segment.end)}] {segment.text.strip()}")
+
+    # Save outputs
+    stem = audio_path.stem
+
+    # Save JSON with timestamps
+    json_path = output_dir / f"{stem}.json"
+    with open(json_path, "w") as f:
+        json.dump({
+            "source_file": str(audio_path),
+            "language": info.language,
+            "language_probability": info.language_probability,
+            "duration": info.duration,
+            "segments": results,
+        }, f, indent=2)
+
+    # Save plain text
+    txt_path = output_dir / f"{stem}.txt"
+    with open(txt_path, "w") as f:
+        f.write("\n".join(full_text))
+
+    print(f"  Saved: {json_path.name}, {txt_path.name}")
+    print(f"  Found {len(results)} speech segments")
+
+    return results
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Transcribe audio files using Whisper")
+    parser.add_argument(
+        "input_dir",
+        type=Path,
+        nargs="?",
+        default=None,
+        help="Directory containing audio files",
+    )
+    parser.add_argument(
+        "-o", "--output-dir",
+        type=Path,
+        default=None,
+        help="Output directory for transcriptions (default: input_dir/transcriptions)",
+    )
+    parser.add_argument(
+        "-m", "--model",
+        default=os.getenv("WHISPER_MODEL", "large-v3"),
+        choices=["tiny", "base", "small", "medium", "large-v3"],
+        help="Whisper model size (default: large-v3, or WHISPER_MODEL env var)",
+    )
+    parser.add_argument(
+        "--device",
+        default="auto",
+        choices=["auto", "cpu", "cuda"],
+        help="Device to use (auto detects GPU)",
+    )
+    parser.add_argument(
+        "-v", "--verbose",
+        action="store_true",
+        help="Print each segment as it's transcribed",
+    )
+    parser.add_argument(
+        "--file",
+        type=Path,
+        default=None,
+        help="Transcribe a single file instead of directory",
+    )
+
+    args = parser.parse_args()
+
+    # Import here to show helpful error if not installed
+    try:
+        from faster_whisper import WhisperModel
+    except ImportError:
+        print("Error: faster-whisper not installed. Install with:")
+        print("  uv add faster-whisper")
+        print("  # or: pip install faster-whisper")
+        sys.exit(1)
+
+    # Determine device
+    if args.device == "auto":
+        import torch
+        device = "cuda" if torch.cuda.is_available() else "cpu"
+        compute_type = "float16" if device == "cuda" else "int8"
+    elif args.device == "cuda":
+        device = "cuda"
+        compute_type = "float16"
+    else:
+        device = "cpu"
+        compute_type = "int8"
+
+    print(f"Using device: {device}, compute type: {compute_type}")
+    print(f"Loading model: {args.model}")
+
+    model = WhisperModel(args.model, device=device, compute_type=compute_type)
+
+    # Handle single file or directory
+    if args.file:
+        audio_files = [args.file]
+        output_dir = args.output_dir or args.file.parent / "transcriptions"
+    elif args.input_dir:
+        input_dir = args.input_dir
+        if not input_dir.exists():
+            print(f"Error: Input directory does not exist: {input_dir}")
+            sys.exit(1)
+
+        audio_files = sorted(
+            p for p in input_dir.iterdir()
+            if p.suffix.lower() in {".ogg", ".mp3", ".wav", ".m4a", ".flac", ".webm"}
+        )
+        output_dir = args.output_dir or input_dir / "transcriptions"
+    else:
+        print("Error: Must specify either input_dir or --file")
+        sys.exit(1)
+
+    if not audio_files:
+        print("No audio files found")
+        sys.exit(1)
+
+    output_dir.mkdir(parents=True, exist_ok=True)
+
+    print(f"Found {len(audio_files)} audio file(s)")
+    print(f"Output directory: {output_dir}")
+
+    for audio_path in audio_files:
+        try:
+            transcribe_file(model, audio_path, output_dir, verbose=args.verbose)
+        except Exception as e:
+            print(f"  Error transcribing {audio_path.name}: {e}")
+
+    print("\nDone!")
+
+
+if __name__ == "__main__":
+    main()

clio-android/.gitignore

@@ -0,0 +1 @@
+android_studio_install_path

clio-android/app/build.gradle.kts

@@ -0,0 +1,61 @@
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "com.example.phonerecorder"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.example.phonerecorder"
+        minSdk = 29
+        targetSdk = 33
+        versionCode = 2
+        versionName = "1.1.0"
+
+        // Build timestamp for version display
+        buildConfigField("long", "BUILD_TIMESTAMP", "${System.currentTimeMillis()}L")
+    }
+
+    buildFeatures {
+        buildConfig = true
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+    implementation("androidx.core:core-ktx:1.12.0")
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    implementation("com.google.android.material:material:1.10.0")
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
+    implementation("androidx.localbroadcastmanager:localbroadcastmanager:1.1.0")
+
+    // Encryption
+    implementation("com.goterl:lazysodium-android:5.1.0@aar")
+    implementation("net.java.dev.jna:jna:5.14.0@aar")
+
+    // Background sync
+    implementation("androidx.work:work-runtime-ktx:2.9.0")
+
+    // HTTP client
+    implementation("com.squareup.okhttp3:okhttp:4.12.0")
+}

clio-android/app/proguard-rules.pro

@@ -0,0 +1,7 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /sdk/tools/proguard/proguard-android.txt
+
+# Keep service and receiver classes
+-keep class com.example.phonerecorder.RecordingService { *; }
+-keep class com.example.phonerecorder.BootReceiver { *; }

clio-android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <!-- Audio recording -->
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+
+    <!-- Foreground service -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MICROPHONE" />
+
+    <!-- Notifications (Android 13+) -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+    <!-- Auto-start on boot -->
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+
+    <!-- Keep CPU awake during recording -->
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+
+    <!-- Request to ignore battery optimizations -->
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+
+    <!-- Network for sync -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.PhoneRecorder"
+        tools:targetApi="33">
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name=".RecordingService"
+            android:exported="false"
+            android:foregroundServiceType="microphone" />
+
+        <receiver
+            android:name=".BootReceiver"
+            android:exported="true"
+            android:enabled="true">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+        </receiver>
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="${applicationId}.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths" />
+        </provider>
+
+    </application>
+
+</manifest>

clio-android/app/src/main/java/com/example/phonerecorder/BootReceiver.kt

@@ -0,0 +1,33 @@
+package com.example.phonerecorder
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.util.Log
+import androidx.core.content.ContextCompat
+
+class BootReceiver : BroadcastReceiver() {
+
+    companion object {
+        private const val TAG = "BootReceiver"
+        private const val PREFS_NAME = "phone_recorder_prefs"
+        private const val PREF_AUTO_START = "auto_start_enabled"
+    }
+
+    override fun onReceive(context: Context, intent: Intent) {
+        if (intent.action == Intent.ACTION_BOOT_COMPLETED) {
+            Log.i(TAG, "Boot completed received")
+
+            val prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+            val autoStartEnabled = prefs.getBoolean(PREF_AUTO_START, false)
+
+            if (autoStartEnabled) {
+                Log.i(TAG, "Auto-start enabled, starting recording service")
+                val serviceIntent = Intent(context, RecordingService::class.java)
+                ContextCompat.startForegroundService(context, serviceIntent)
+            } else {
+                Log.i(TAG, "Auto-start disabled, not starting service")
+            }
+        }
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/MainActivity.kt

@@ -0,0 +1,540 @@
+package com.example.phonerecorder
+
+import android.Manifest
+import android.content.BroadcastReceiver
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.content.ServiceConnection
+import android.content.SharedPreferences
+import android.content.pm.PackageManager
+import android.net.Uri
+import android.os.BatteryManager
+import android.os.Build
+import android.os.Bundle
+import android.os.IBinder
+import android.os.PowerManager
+import android.provider.Settings
+import android.view.View
+import android.widget.AdapterView
+import android.widget.ArrayAdapter
+import android.widget.EditText
+import android.widget.Spinner
+import android.widget.TextView
+import android.widget.Toast
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.content.ContextCompat
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
+import com.example.phonerecorder.crypto.KeyManager
+import com.example.phonerecorder.sync.NetworkHelper
+import com.example.phonerecorder.sync.SyncManager
+import com.example.phonerecorder.sync.SyncMode
+import com.example.phonerecorder.sync.SyncSettings
+import com.example.phonerecorder.sync.SyncStatus
+import com.google.android.material.button.MaterialButton
+import com.google.android.material.switchmaterial.SwitchMaterial
+import java.util.Locale
+
+class MainActivity : AppCompatActivity() {
+
+    companion object {
+        private const val PREFS_NAME = "phone_recorder_prefs"
+        private const val PREF_AUTO_START = "auto_start_enabled"
+    }
+
+    private lateinit var statusIndicator: android.view.View
+    private lateinit var statusText: TextView
+    private lateinit var elapsedTimeText: TextView
+    private lateinit var currentFileText: TextView
+    private lateinit var storageLocationText: TextView
+    private lateinit var storageInfoText: TextView
+    private lateinit var batteryInfoText: TextView
+    private lateinit var toggleButton: MaterialButton
+    private lateinit var autoStartSwitch: SwitchMaterial
+    private lateinit var batteryOptimizationHint: TextView
+    private lateinit var syncModeSpinner: Spinner
+    private lateinit var keyStatusText: TextView
+    private lateinit var importKeyButton: MaterialButton
+    private lateinit var syncStatusText: TextView
+    private lateinit var networkInfoText: TextView
+    private lateinit var configureLanButton: MaterialButton
+    private lateinit var versionText: TextView
+
+    private lateinit var storageHelper: StorageHelper
+    private lateinit var prefs: SharedPreferences
+    private lateinit var keyManager: KeyManager
+    private lateinit var syncManager: SyncManager
+    private lateinit var networkHelper: NetworkHelper
+    private lateinit var syncSettings: SyncSettings
+
+    private var recordingService: RecordingService? = null
+    private var isBound = false
+
+    private val serviceConnection = object : ServiceConnection {
+        override fun onServiceConnected(name: ComponentName?, service: IBinder?) {
+            val binder = service as RecordingService.RecordingBinder
+            recordingService = binder.getService()
+            isBound = true
+            updateUI()
+        }
+
+        override fun onServiceDisconnected(name: ComponentName?) {
+            recordingService = null
+            isBound = false
+        }
+    }
+
+    private val recordingReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context?, intent: Intent?) {
+            when (intent?.action) {
+                RecordingService.ACTION_RECORDING_STARTED,
+                RecordingService.ACTION_RECORDING_STOPPED,
+                RecordingService.ACTION_RECORDING_UPDATE -> updateUI()
+                RecordingService.ACTION_LOW_STORAGE -> {
+                    Toast.makeText(
+                        this@MainActivity,
+                        R.string.storage_warning,
+                        Toast.LENGTH_LONG
+                    ).show()
+                    updateUI()
+                    updateSyncStatus()
+                }
+            }
+        }
+    }
+
+    private val permissionLauncher = registerForActivityResult(
+        ActivityResultContracts.RequestMultiplePermissions()
+    ) { permissions ->
+        val allGranted = permissions.all { it.value }
+        if (allGranted) {
+            startRecordingService()
+        } else {
+            Toast.makeText(this, R.string.permission_required, Toast.LENGTH_LONG).show()
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        storageHelper = StorageHelper(this)
+        prefs = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+        keyManager = KeyManager(this)
+        syncManager = SyncManager.getInstance(this)
+        networkHelper = NetworkHelper(this)
+        syncSettings = SyncSettings(this)
+
+        initViews()
+        setupListeners()
+        setupSyncUI()
+        checkBatteryOptimization()
+
+        // Start periodic sync based on settings
+        syncManager.startPeriodicSync()
+    }
+
+    override fun onStart() {
+        super.onStart()
+        bindRecordingService()
+        registerReceivers()
+        updateUI()
+        updateNetworkInfo()
+        updateSyncStatus()
+    }
+
+    override fun onStop() {
+        super.onStop()
+        unregisterReceivers()
+        unbindRecordingService()
+    }
+
+    private fun initViews() {
+        statusIndicator = findViewById(R.id.statusIndicator)
+        statusText = findViewById(R.id.statusText)
+        elapsedTimeText = findViewById(R.id.elapsedTimeText)
+        currentFileText = findViewById(R.id.currentFileText)
+        storageLocationText = findViewById(R.id.storageLocationText)
+        storageInfoText = findViewById(R.id.storageInfoText)
+        batteryInfoText = findViewById(R.id.batteryInfoText)
+        toggleButton = findViewById(R.id.toggleButton)
+        autoStartSwitch = findViewById(R.id.autoStartSwitch)
+        batteryOptimizationHint = findViewById(R.id.batteryOptimizationHint)
+
+        // Initialize auto-start switch state
+        autoStartSwitch.isChecked = prefs.getBoolean(PREF_AUTO_START, false)
+        updateAutoStartText()
+
+        // Sync UI elements
+        syncModeSpinner = findViewById(R.id.syncModeSpinner)
+        keyStatusText = findViewById(R.id.keyStatusText)
+        importKeyButton = findViewById(R.id.importKeyButton)
+        syncStatusText = findViewById(R.id.syncStatusText)
+        networkInfoText = findViewById(R.id.networkInfoText)
+        configureLanButton = findViewById(R.id.configureLanButton)
+        versionText = findViewById(R.id.versionText)
+
+        // Set version info
+        val buildDate = java.text.SimpleDateFormat("yyyy-MM-dd", java.util.Locale.US)
+            .format(java.util.Date(BuildConfig.BUILD_TIMESTAMP))
+        versionText.text = "v${BuildConfig.VERSION_NAME} (build $buildDate)"
+    }
+
+    private fun setupListeners() {
+        toggleButton.setOnClickListener {
+            if (recordingService?.isRecording() == true) {
+                stopRecordingService()
+            } else {
+                checkPermissionsAndStart()
+            }
+        }
+
+        autoStartSwitch.setOnCheckedChangeListener { _, isChecked ->
+            prefs.edit().putBoolean(PREF_AUTO_START, isChecked).apply()
+            updateAutoStartText()
+        }
+
+        batteryOptimizationHint.setOnClickListener {
+            openBatteryOptimizationSettings()
+        }
+
+        importKeyButton.setOnClickListener {
+            showImportKeyDialog()
+        }
+
+        configureLanButton.setOnClickListener {
+            showLanConfigDialog()
+        }
+    }
+
+    private fun setupSyncUI() {
+        // Setup sync mode spinner
+        val syncModes = arrayOf(
+            getString(R.string.sync_mode_never),
+            getString(R.string.sync_mode_lan_only),
+            getString(R.string.sync_mode_wifi_only),
+            getString(R.string.sync_mode_any_network)
+        )
+
+        val adapter = ArrayAdapter(this, android.R.layout.simple_spinner_item, syncModes)
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
+        syncModeSpinner.adapter = adapter
+
+        // Set current selection
+        syncModeSpinner.setSelection(syncManager.getSyncMode().ordinal)
+
+        // Handle selection changes
+        syncModeSpinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
+            override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
+                val mode = SyncMode.entries[position]
+                syncManager.setSyncMode(mode)
+                updateSyncStatus()
+            }
+
+            override fun onNothingSelected(parent: AdapterView<*>?) {}
+        }
+
+        updateKeyStatus()
+        updateSyncStatus()
+        updateNetworkInfo()
+    }
+
+    private fun updateNetworkInfo() {
+        val ipAddress = networkHelper.getCurrentIpAddress()
+        networkInfoText.text = when {
+            ipAddress != null && networkHelper.isOnWifi() ->
+                getString(R.string.network_wifi, ipAddress)
+            networkHelper.isNetworkAvailable() ->
+                getString(R.string.network_mobile)
+            else ->
+                getString(R.string.network_not_connected)
+        }
+    }
+
+    private fun showLanConfigDialog() {
+        val currentIp = networkHelper.getCurrentIpAddress() ?: "Not connected"
+        val currentServerUrl = syncSettings.lanServerUrl
+        val currentPrefix = syncSettings.lanSubnetPrefix
+        val currentApiKey = syncSettings.apiKey
+
+        // Create a layout with fields
+        val layout = android.widget.LinearLayout(this).apply {
+            orientation = android.widget.LinearLayout.VERTICAL
+            setPadding(48, 24, 48, 0)
+        }
+
+        val serverLabel = TextView(this).apply {
+            text = "LAN Server URL:"
+            setTextColor(ContextCompat.getColor(this@MainActivity, android.R.color.darker_gray))
+        }
+        layout.addView(serverLabel)
+
+        val serverEdit = EditText(this).apply {
+            hint = "http://10.0.0.45:8000"
+            setText(currentServerUrl)
+            isSingleLine = true
+            inputType = android.text.InputType.TYPE_TEXT_VARIATION_URI
+        }
+        layout.addView(serverEdit)
+
+        val prefixLabel = TextView(this).apply {
+            text = "\nLAN Subnet Prefix:"
+            setTextColor(ContextCompat.getColor(this@MainActivity, android.R.color.darker_gray))
+        }
+        layout.addView(prefixLabel)
+
+        val prefixEdit = EditText(this).apply {
+            hint = getString(R.string.lan_subnet_hint)
+            setText(currentPrefix)
+            isSingleLine = true
+        }
+        layout.addView(prefixEdit)
+
+        val apiKeyLabel = TextView(this).apply {
+            text = "\nAPI Key (for upload auth):"
+            setTextColor(ContextCompat.getColor(this@MainActivity, android.R.color.darker_gray))
+        }
+        layout.addView(apiKeyLabel)
+
+        val apiKeyEdit = EditText(this).apply {
+            hint = "Leave empty if not required"
+            setText(currentApiKey)
+            isSingleLine = true
+            inputType = android.text.InputType.TYPE_CLASS_TEXT or android.text.InputType.TYPE_TEXT_VARIATION_PASSWORD
+        }
+        layout.addView(apiKeyEdit)
+
+        val infoText = TextView(this).apply {
+            text = "\nYour IP: $currentIp"
+            setTextColor(ContextCompat.getColor(this@MainActivity, android.R.color.darker_gray))
+            textSize = 12f
+        }
+        layout.addView(infoText)
+
+        AlertDialog.Builder(this)
+            .setTitle(R.string.lan_config_title)
+            .setView(layout)
+            .setPositiveButton(android.R.string.ok) { _, _ ->
+                // Save server URL
+                val serverUrl = serverEdit.text.toString().trim()
+                if (serverUrl.isNotEmpty()) {
+                    syncSettings.lanServerUrl = serverUrl
+                }
+
+                // Save subnet prefix
+                var prefix = prefixEdit.text.toString().trim()
+                if (prefix.isNotEmpty() && !prefix.endsWith(".")) {
+                    prefix = "$prefix."
+                }
+                if (prefix.isNotEmpty()) {
+                    syncSettings.lanSubnetPrefix = prefix
+                }
+
+                // Save API key
+                syncSettings.apiKey = apiKeyEdit.text.toString().trim()
+
+                Toast.makeText(this, "Settings saved", Toast.LENGTH_SHORT).show()
+                updateNetworkInfo()
+                updateSyncStatus()
+            }
+            .setNegativeButton(android.R.string.cancel, null)
+            .show()
+    }
+
+    private fun showImportKeyDialog() {
+        val editText = EditText(this).apply {
+            hint = getString(R.string.import_key_hint)
+            isSingleLine = false
+            minLines = 2
+            maxLines = 4
+        }
+
+        AlertDialog.Builder(this)
+            .setTitle(R.string.import_key_title)
+            .setView(editText)
+            .setPositiveButton(android.R.string.ok) { _, _ ->
+                val key = editText.text.toString().trim()
+                if (keyManager.setPublicKey(key)) {
+                    Toast.makeText(this, R.string.import_key_success, Toast.LENGTH_SHORT).show()
+                    updateKeyStatus()
+                    updateSyncStatus()
+                } else {
+                    Toast.makeText(this, R.string.import_key_error, Toast.LENGTH_LONG).show()
+                }
+            }
+            .setNegativeButton(android.R.string.cancel, null)
+            .show()
+    }
+
+    private fun updateKeyStatus() {
+        keyStatusText.text = if (keyManager.hasPublicKey()) {
+            getString(R.string.key_status_configured)
+        } else {
+            getString(R.string.key_status_not_configured)
+        }
+    }
+
+    private fun updateSyncStatus() {
+        val status = syncManager.getSyncStatus(keyManager.hasPublicKey())
+        syncStatusText.text = when (status) {
+            is SyncStatus.Disabled -> getString(R.string.sync_status_disabled)
+            is SyncStatus.NoKey -> getString(R.string.sync_status_no_key)
+            is SyncStatus.NotOnWifi -> getString(R.string.sync_status_not_on_wifi)
+            is SyncStatus.NotOnLan -> getString(R.string.sync_status_not_on_lan)
+            is SyncStatus.NoNetwork -> getString(R.string.sync_status_no_network)
+            is SyncStatus.Ready -> getString(R.string.sync_status_pending, status.pending)
+            is SyncStatus.Synced -> getString(R.string.sync_status_synced)
+        }
+    }
+
+    private fun updateAutoStartText() {
+        autoStartSwitch.text = if (autoStartSwitch.isChecked) {
+            getString(R.string.auto_start_enabled)
+        } else {
+            getString(R.string.auto_start_disabled)
+        }
+    }
+
+    private fun checkPermissionsAndStart() {
+        val permissions = mutableListOf(Manifest.permission.RECORD_AUDIO)
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            permissions.add(Manifest.permission.POST_NOTIFICATIONS)
+        }
+
+        val notGranted = permissions.filter {
+            ContextCompat.checkSelfPermission(this, it) != PackageManager.PERMISSION_GRANTED
+        }
+
+        if (notGranted.isEmpty()) {
+            startRecordingService()
+        } else {
+            permissionLauncher.launch(notGranted.toTypedArray())
+        }
+    }
+
+    private fun startRecordingService() {
+        val intent = Intent(this, RecordingService::class.java)
+        ContextCompat.startForegroundService(this, intent)
+        bindRecordingService()
+    }
+
+    private fun stopRecordingService() {
+        recordingService?.stopRecording()
+        stopService(Intent(this, RecordingService::class.java))
+    }
+
+    private fun bindRecordingService() {
+        val intent = Intent(this, RecordingService::class.java)
+        bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE)
+    }
+
+    private fun unbindRecordingService() {
+        if (isBound) {
+            unbindService(serviceConnection)
+            isBound = false
+        }
+    }
+
+    private fun registerReceivers() {
+        val filter = IntentFilter().apply {
+            addAction(RecordingService.ACTION_RECORDING_STARTED)
+            addAction(RecordingService.ACTION_RECORDING_STOPPED)
+            addAction(RecordingService.ACTION_RECORDING_UPDATE)
+            addAction(RecordingService.ACTION_LOW_STORAGE)
+        }
+        LocalBroadcastManager.getInstance(this).registerReceiver(recordingReceiver, filter)
+    }
+
+    private fun unregisterReceivers() {
+        LocalBroadcastManager.getInstance(this).unregisterReceiver(recordingReceiver)
+    }
+
+    private fun updateUI() {
+        val isRecording = recordingService?.isRecording() == true
+
+        // Status indicator
+        statusIndicator.setBackgroundResource(
+            if (isRecording) R.drawable.status_circle_active else R.drawable.status_circle
+        )
+        statusText.text = getString(
+            if (isRecording) R.string.status_recording else R.string.status_stopped
+        )
+
+        // Elapsed time
+        val elapsed = recordingService?.getElapsedTime() ?: 0L
+        elapsedTimeText.text = formatElapsedTime(elapsed)
+
+        // Current file
+        val filename = recordingService?.getCurrentFilename()
+        currentFileText.text = if (filename != null) {
+            getString(R.string.current_file, filename)
+        } else {
+            getString(R.string.current_file, getString(R.string.no_file))
+        }
+
+        // Storage info
+        val storageInfo = storageHelper.getStorageInfo()
+        storageLocationText.text = getString(
+            if (storageInfo.isSDCard) R.string.storage_location_sd else R.string.storage_location_internal
+        )
+        storageInfoText.text = getString(
+            R.string.storage_info,
+            storageHelper.formatBytes(storageInfo.usedBytes),
+            storageHelper.formatBytes(storageInfo.availableBytes)
+        )
+
+        // Battery info
+        val batteryManager = getSystemService(Context.BATTERY_SERVICE) as BatteryManager
+        val batteryLevel = batteryManager.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY)
+        batteryInfoText.text = getString(R.string.battery_info, batteryLevel)
+
+        // Toggle button
+        toggleButton.text = getString(
+            if (isRecording) R.string.stop_recording else R.string.start_recording
+        )
+    }
+
+    private fun formatElapsedTime(millis: Long): String {
+        val seconds = (millis / 1000) % 60
+        val minutes = (millis / (1000 * 60)) % 60
+        val hours = millis / (1000 * 60 * 60)
+        return String.format(Locale.US, "%02d:%02d:%02d", hours, minutes, seconds)
+    }
+
+    private fun checkBatteryOptimization() {
+        val powerManager = getSystemService(Context.POWER_SERVICE) as PowerManager
+        if (!powerManager.isIgnoringBatteryOptimizations(packageName)) {
+            showBatteryOptimizationDialog()
+        } else {
+            batteryOptimizationHint.visibility = android.view.View.GONE
+        }
+    }
+
+    private fun showBatteryOptimizationDialog() {
+        AlertDialog.Builder(this)
+            .setTitle(R.string.battery_optimization_title)
+            .setMessage(R.string.battery_optimization_message)
+            .setPositiveButton(R.string.battery_optimization_button) { _, _ ->
+                openBatteryOptimizationSettings()
+            }
+            .setNegativeButton(android.R.string.cancel, null)
+            .show()
+    }
+
+    private fun openBatteryOptimizationSettings() {
+        try {
+            val intent = Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS).apply {
+                data = Uri.parse("package:$packageName")
+            }
+            startActivity(intent)
+        } catch (e: Exception) {
+            // Fall back to general battery settings
+            val intent = Intent(Settings.ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS)
+            startActivity(intent)
+        }
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/RecordingService.kt

@@ -0,0 +1,378 @@
+package com.example.phonerecorder
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.media.MediaRecorder
+import android.os.Binder
+import android.os.Build
+import android.os.Handler
+import android.os.IBinder
+import android.os.Looper
+import android.os.PowerManager
+import android.util.Log
+import androidx.core.app.NotificationCompat
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
+import com.example.phonerecorder.crypto.CryptoHelper
+import com.example.phonerecorder.crypto.KeyManager
+import com.example.phonerecorder.sync.SyncManager
+import java.io.File
+import java.util.Locale
+
+class RecordingService : Service() {
+
+    companion object {
+        private const val TAG = "RecordingService"
+        private const val NOTIFICATION_ID = 1
+        private const val CHANNEL_ID = "recording_channel"
+
+        // Segment rotation: 2 hours in milliseconds
+        private const val SEGMENT_DURATION_MS = 2 * 60 * 60 * 1000L
+
+        // Storage check interval: 5 minutes
+        private const val STORAGE_CHECK_INTERVAL_MS = 5 * 60 * 1000L
+
+        // Notification update interval: 1 second
+        private const val NOTIFICATION_UPDATE_INTERVAL_MS = 1000L
+
+        // Broadcast actions
+        const val ACTION_RECORDING_STARTED = "com.example.phonerecorder.RECORDING_STARTED"
+        const val ACTION_RECORDING_STOPPED = "com.example.phonerecorder.RECORDING_STOPPED"
+        const val ACTION_RECORDING_UPDATE = "com.example.phonerecorder.RECORDING_UPDATE"
+        const val ACTION_LOW_STORAGE = "com.example.phonerecorder.LOW_STORAGE"
+
+        // Intent extras
+        const val EXTRA_FILENAME = "filename"
+        const val EXTRA_ELAPSED_TIME = "elapsed_time"
+    }
+
+    private val binder = RecordingBinder()
+    private var mediaRecorder: MediaRecorder? = null
+    private var wakeLock: PowerManager.WakeLock? = null
+    private lateinit var storageHelper: StorageHelper
+    private lateinit var notificationManager: NotificationManager
+    private lateinit var keyManager: KeyManager
+    private lateinit var cryptoHelper: CryptoHelper
+    private var syncManager: SyncManager? = null
+
+    private var isRecording = false
+    private var currentTempFile: File? = null
+    private var currentFile: File? = null
+    private var segmentStartTime: Long = 0
+    private var totalElapsedTime: Long = 0
+
+    private val handler = Handler(Looper.getMainLooper())
+
+    private val segmentRotationRunnable = Runnable { rotateSegment() }
+    private val storageCheckRunnable = object : Runnable {
+        override fun run() {
+            checkStorage()
+            if (isRecording) {
+                handler.postDelayed(this, STORAGE_CHECK_INTERVAL_MS)
+            }
+        }
+    }
+    private val notificationUpdateRunnable = object : Runnable {
+        override fun run() {
+            updateNotification()
+            broadcastUpdate()
+            if (isRecording) {
+                handler.postDelayed(this, NOTIFICATION_UPDATE_INTERVAL_MS)
+            }
+        }
+    }
+
+    inner class RecordingBinder : Binder() {
+        fun getService(): RecordingService = this@RecordingService
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+        storageHelper = StorageHelper(this)
+        notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        keyManager = KeyManager(this)
+        cryptoHelper = CryptoHelper(keyManager)
+        syncManager = SyncManager.getInstance(this)
+        createNotificationChannel()
+    }
+
+    override fun onBind(intent: Intent?): IBinder = binder
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (!isRecording) {
+            startRecording()
+        }
+        return START_STICKY
+    }
+
+    override fun onDestroy() {
+        stopRecording()
+        super.onDestroy()
+    }
+
+    fun isRecording(): Boolean = isRecording
+
+    fun getCurrentFilename(): String? = currentFile?.name
+
+    fun getElapsedTime(): Long {
+        return if (isRecording) {
+            totalElapsedTime + (System.currentTimeMillis() - segmentStartTime)
+        } else {
+            totalElapsedTime
+        }
+    }
+
+    fun startRecording() {
+        if (isRecording) return
+
+        if (storageHelper.isStorageLow()) {
+            broadcastLowStorage()
+            return
+        }
+
+        try {
+            acquireWakeLock()
+            startNewSegment()
+            isRecording = true
+            totalElapsedTime = 0
+
+            // Schedule segment rotation
+            handler.postDelayed(segmentRotationRunnable, SEGMENT_DURATION_MS)
+
+            // Start storage checks
+            handler.postDelayed(storageCheckRunnable, STORAGE_CHECK_INTERVAL_MS)
+
+            // Start notification updates
+            handler.post(notificationUpdateRunnable)
+
+            // Start foreground service
+            startForeground(NOTIFICATION_ID, createNotification())
+
+            broadcastRecordingStarted()
+            Log.i(TAG, "Recording started: ${currentFile?.name}")
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to start recording", e)
+            stopRecording()
+        }
+    }
+
+    fun stopRecording() {
+        if (!isRecording) return
+
+        isRecording = false
+        totalElapsedTime += System.currentTimeMillis() - segmentStartTime
+
+        handler.removeCallbacks(segmentRotationRunnable)
+        handler.removeCallbacks(storageCheckRunnable)
+        handler.removeCallbacks(notificationUpdateRunnable)
+
+        releaseMediaRecorder()
+        releaseWakeLock()
+
+        stopForeground(STOP_FOREGROUND_REMOVE)
+        broadcastRecordingStopped()
+
+        Log.i(TAG, "Recording stopped")
+    }
+
+    private fun startNewSegment() {
+        releaseMediaRecorder()
+
+        // Record to temp file first (will be encrypted after recording stops)
+        currentTempFile = storageHelper.getNewTempRecordingFile()
+        segmentStartTime = System.currentTimeMillis()
+
+        mediaRecorder = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            MediaRecorder(this)
+        } else {
+            @Suppress("DEPRECATION")
+            MediaRecorder()
+        }
+
+        mediaRecorder?.apply {
+            setAudioSource(MediaRecorder.AudioSource.MIC)
+            setOutputFormat(MediaRecorder.OutputFormat.OGG)
+            setAudioEncoder(MediaRecorder.AudioEncoder.OPUS)
+            setAudioEncodingBitRate(64000)
+            setAudioSamplingRate(48000)
+            setAudioChannels(1)
+            setOutputFile(currentTempFile?.absolutePath)
+            prepare()
+            start()
+        }
+
+        // Update currentFile to show the expected encrypted filename
+        currentFile = currentTempFile?.let { storageHelper.getEncryptedFileForTemp(it) }
+
+        Log.i(TAG, "New segment started: ${currentTempFile?.name}")
+    }
+
+    private fun rotateSegment() {
+        if (!isRecording) return
+
+        Log.i(TAG, "Rotating segment...")
+        totalElapsedTime += System.currentTimeMillis() - segmentStartTime
+
+        try {
+            startNewSegment()
+            handler.postDelayed(segmentRotationRunnable, SEGMENT_DURATION_MS)
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to rotate segment", e)
+            stopRecording()
+        }
+    }
+
+    private fun checkStorage() {
+        if (storageHelper.isStorageLow()) {
+            Log.w(TAG, "Low storage detected, stopping recording")
+            stopRecording()
+            broadcastLowStorage()
+        }
+    }
+
+    private fun releaseMediaRecorder() {
+        val tempFile = currentTempFile
+        try {
+            mediaRecorder?.apply {
+                stop()
+                release()
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Error releasing MediaRecorder", e)
+        }
+        mediaRecorder = null
+
+        // Encrypt the completed recording
+        if (tempFile != null && tempFile.exists()) {
+            encryptCompletedRecording(tempFile)
+        }
+        currentTempFile = null
+    }
+
+    /**
+     * Encrypts a completed recording and deletes the temp file.
+     * If no public key is available, the recording is NOT stored (security requirement).
+     */
+    private fun encryptCompletedRecording(tempFile: File) {
+        if (!cryptoHelper.hasPublicKey()) {
+            Log.w(TAG, "No public key configured - deleting unencrypted recording for security")
+            tempFile.delete()
+            return
+        }
+
+        val encryptedFile = storageHelper.getEncryptedFileForTemp(tempFile)
+
+        try {
+            val success = cryptoHelper.encryptFile(tempFile, encryptedFile)
+            if (success) {
+                // Delete temp file after successful encryption
+                tempFile.delete()
+                currentFile = encryptedFile
+                Log.i(TAG, "Recording encrypted: ${encryptedFile.name}")
+
+                // Trigger immediate sync
+                syncManager?.scheduleImmediateSync()
+            } else {
+                Log.e(TAG, "Failed to encrypt recording - deleting temp file for security")
+                tempFile.delete()
+                encryptedFile.delete() // Clean up partial encrypted file
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Error during encryption - deleting files for security", e)
+            tempFile.delete()
+            encryptedFile.delete()
+        }
+    }
+
+    private fun acquireWakeLock() {
+        val powerManager = getSystemService(Context.POWER_SERVICE) as PowerManager
+        wakeLock = powerManager.newWakeLock(
+            PowerManager.PARTIAL_WAKE_LOCK,
+            "PhoneRecorder::RecordingWakeLock"
+        ).apply {
+            acquire()
+        }
+    }
+
+    private fun releaseWakeLock() {
+        wakeLock?.let {
+            if (it.isHeld) {
+                it.release()
+            }
+        }
+        wakeLock = null
+    }
+
+    private fun createNotificationChannel() {
+        val channel = NotificationChannel(
+            CHANNEL_ID,
+            getString(R.string.notification_channel_name),
+            NotificationManager.IMPORTANCE_LOW
+        ).apply {
+            description = getString(R.string.notification_channel_description)
+            setShowBadge(false)
+        }
+        notificationManager.createNotificationChannel(channel)
+    }
+
+    private fun createNotification(): Notification {
+        val intent = Intent(this, MainActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_SINGLE_TOP
+        }
+        val pendingIntent = PendingIntent.getActivity(
+            this, 0, intent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+
+        val elapsedFormatted = formatElapsedTime(getElapsedTime())
+
+        return NotificationCompat.Builder(this, CHANNEL_ID)
+            .setContentTitle(getString(R.string.notification_title))
+            .setContentText(getString(R.string.notification_text, elapsedFormatted))
+            .setSmallIcon(android.R.drawable.ic_btn_speak_now)
+            .setContentIntent(pendingIntent)
+            .setOngoing(true)
+            .setSilent(true)
+            .build()
+    }
+
+    private fun updateNotification() {
+        if (isRecording) {
+            notificationManager.notify(NOTIFICATION_ID, createNotification())
+        }
+    }
+
+    private fun formatElapsedTime(millis: Long): String {
+        val seconds = (millis / 1000) % 60
+        val minutes = (millis / (1000 * 60)) % 60
+        val hours = millis / (1000 * 60 * 60)
+        return String.format(Locale.US, "%02d:%02d:%02d", hours, minutes, seconds)
+    }
+
+    private fun broadcastRecordingStarted() {
+        val intent = Intent(ACTION_RECORDING_STARTED).apply {
+            putExtra(EXTRA_FILENAME, currentFile?.name)
+        }
+        LocalBroadcastManager.getInstance(this).sendBroadcast(intent)
+    }
+
+    private fun broadcastRecordingStopped() {
+        LocalBroadcastManager.getInstance(this).sendBroadcast(Intent(ACTION_RECORDING_STOPPED))
+    }
+
+    private fun broadcastUpdate() {
+        val intent = Intent(ACTION_RECORDING_UPDATE).apply {
+            putExtra(EXTRA_FILENAME, currentFile?.name)
+            putExtra(EXTRA_ELAPSED_TIME, getElapsedTime())
+        }
+        LocalBroadcastManager.getInstance(this).sendBroadcast(intent)
+    }
+
+    private fun broadcastLowStorage() {
+        LocalBroadcastManager.getInstance(this).sendBroadcast(Intent(ACTION_LOW_STORAGE))
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/StorageHelper.kt

@@ -0,0 +1,222 @@
+package com.example.phonerecorder
+
+import android.content.Context
+import android.os.StatFs
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+
+class StorageHelper(private val context: Context) {
+
+    companion object {
+        private const val RECORDINGS_FOLDER = "recordings"
+        private const val TEMP_FOLDER = "temp"
+        private const val LOW_STORAGE_THRESHOLD_MB = 500L
+        private const val BYTES_PER_MB = 1024L * 1024L
+        private const val BYTES_PER_GB = 1024L * 1024L * 1024L
+    }
+
+    data class StorageInfo(
+        val usedBytes: Long,
+        val availableBytes: Long,
+        // this should be a storage type, not an isSDCard
+        val isSDCard: Boolean,
+        val recordingsDir: File
+    )
+
+    /**
+     * Gets the best available storage location.
+     * Prefers SD card, falls back to internal storage.
+     */
+    fun getRecordingsDirectory(): File {
+        val externalDirs = context.getExternalFilesDirs(null)
+
+        // Find SD card (second external storage, if available)
+        val sdCardDir = externalDirs.getOrNull(1)
+        if (sdCardDir != null && isStorageAvailable(sdCardDir)) {
+            return ensureRecordingsFolder(sdCardDir)
+        }
+
+        // Fall back to primary external storage
+        val primaryDir = externalDirs.getOrNull(0)
+        if (primaryDir != null && isStorageAvailable(primaryDir)) {
+            return ensureRecordingsFolder(primaryDir)
+        }
+
+        // Last resort: internal files directory
+        return ensureRecordingsFolder(context.filesDir)
+    }
+
+    /**
+     * Checks if we're using SD card storage.
+     */
+    fun isUsingSDCard(): Boolean {
+        val externalDirs = context.getExternalFilesDirs(null)
+        val sdCardDir = externalDirs.getOrNull(1)
+        return sdCardDir != null && isStorageAvailable(sdCardDir)
+    }
+
+    /**
+     * Gets storage information for the recordings directory.
+     */
+    fun getStorageInfo(): StorageInfo {
+        val recordingsDir = getRecordingsDirectory()
+        val parentDir = recordingsDir.parentFile ?: recordingsDir
+
+        val statFs = StatFs(parentDir.absolutePath)
+        val availableBytes = statFs.availableBytes
+        val usedBytes = calculateUsedStorage(recordingsDir)
+
+        return StorageInfo(
+            usedBytes = usedBytes,
+            availableBytes = availableBytes,
+            isSDCard = isUsingSDCard(),
+            recordingsDir = recordingsDir
+        )
+    }
+
+    /**
+     * Checks if storage is below the low threshold.
+     */
+    fun isStorageLow(): Boolean {
+        val info = getStorageInfo()
+        return info.availableBytes < LOW_STORAGE_THRESHOLD_MB * BYTES_PER_MB
+    }
+
+    /**
+     * Gets the temp directory for unencrypted recordings during recording.
+     */
+    fun getTempDirectory(): File {
+        val baseDir = getBaseStorageDirectory()
+        return ensureFolder(baseDir, TEMP_FOLDER)
+    }
+
+    /**
+     * Gets the base storage directory (parent of recordings and temp).
+     */
+    private fun getBaseStorageDirectory(): File {
+        val externalDirs = context.getExternalFilesDirs(null)
+
+        // Find SD card (second external storage, if available)
+        val sdCardDir = externalDirs.getOrNull(1)
+        if (sdCardDir != null && isStorageAvailable(sdCardDir)) {
+            return sdCardDir
+        }
+
+        // Fall back to primary external storage
+        val primaryDir = externalDirs.getOrNull(0)
+        if (primaryDir != null && isStorageAvailable(primaryDir)) {
+            return primaryDir
+        }
+
+        // Last resort: internal files directory
+        return context.filesDir
+    }
+
+    /**
+     * Generates a new recording filename with current timestamp (for encrypted files).
+     */
+    fun generateFilename(): String {
+        val dateFormat = SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.US)
+        val timestamp = dateFormat.format(Date())
+        return "recording_$timestamp.ogg.enc"
+    }
+
+    /**
+     * Generates a temp filename (unencrypted, used during recording).
+     */
+    fun generateTempFilename(): String {
+        val dateFormat = SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.US)
+        val timestamp = dateFormat.format(Date())
+        return "recording_$timestamp.ogg"
+    }
+
+    /**
+     * Gets the full path for a new temp recording file (unencrypted during recording).
+     */
+    fun getNewTempRecordingFile(): File {
+        val dir = getTempDirectory()
+        return File(dir, generateTempFilename())
+    }
+
+    /**
+     * Gets the full path for a new encrypted recording file.
+     */
+    fun getNewRecordingFile(): File {
+        val dir = getRecordingsDirectory()
+        return File(dir, generateFilename())
+    }
+
+    /**
+     * Gets the encrypted file path corresponding to a temp file.
+     */
+    fun getEncryptedFileForTemp(tempFile: File): File {
+        val dir = getRecordingsDirectory()
+        val encryptedName = tempFile.name + ".enc"
+        return File(dir, encryptedName)
+    }
+
+    /**
+     * Lists all unsynced encrypted recording files.
+     */
+    fun listUnsyncedRecordings(syncedFiles: Set<String>): List<File> {
+        val dir = getRecordingsDirectory()
+        return dir.listFiles { file -> file.name.endsWith(".ogg.enc") }
+            ?.filter { !syncedFiles.contains(it.name) }
+            ?.sortedBy { it.lastModified() }
+            ?: emptyList()
+    }
+
+    /**
+     * Formats bytes as human-readable string (e.g., "2.5 GB").
+     */
+    fun formatBytes(bytes: Long): String {
+        return when {
+            bytes >= BYTES_PER_GB -> String.format(Locale.US, "%.1f GB", bytes.toDouble() / BYTES_PER_GB)
+            bytes >= BYTES_PER_MB -> String.format(Locale.US, "%.1f MB", bytes.toDouble() / BYTES_PER_MB)
+            else -> String.format(Locale.US, "%d KB", bytes / 1024)
+        }
+    }
+
+    /**
+     * Lists all recording files sorted by date (newest first).
+     * Includes both encrypted (.ogg.enc) and unencrypted (.ogg) files.
+     */
+    fun listRecordings(): List<File> {
+        val dir = getRecordingsDirectory()
+        return dir.listFiles { file ->
+            file.name.endsWith(".ogg") || file.name.endsWith(".ogg.enc")
+        }
+            ?.sortedByDescending { it.lastModified() }
+            ?: emptyList()
+    }
+
+    private fun isStorageAvailable(dir: File): Boolean {
+        return try {
+            if (!dir.exists()) {
+                dir.mkdirs()
+            }
+            dir.canWrite()
+        } catch (e: Exception) {
+            false
+        }
+    }
+
+    private fun ensureRecordingsFolder(baseDir: File): File {
+        return ensureFolder(baseDir, RECORDINGS_FOLDER)
+    }
+
+    private fun ensureFolder(baseDir: File, folderName: String): File {
+        val dir = File(baseDir, folderName)
+        if (!dir.exists()) {
+            dir.mkdirs()
+        }
+        return dir
+    }
+
+    private fun calculateUsedStorage(dir: File): Long {
+        if (!dir.exists()) return 0L
+        return dir.listFiles()?.sumOf { it.length() } ?: 0L
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/api/RecordingsApi.kt

@@ -0,0 +1,229 @@
+package com.example.phonerecorder.api
+
+import android.util.Log
+import okhttp3.MediaType.Companion.toMediaType
+import okhttp3.MultipartBody
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.RequestBody.Companion.asRequestBody
+import org.json.JSONObject
+import java.io.File
+import java.io.FileInputStream
+import java.io.IOException
+import java.security.MessageDigest
+import java.util.concurrent.TimeUnit
+
+class RecordingsApi {
+
+    companion object {
+        private const val TAG = "RecordingsApi"
+        private const val CONNECT_TIMEOUT_SECONDS = 30L
+        private const val READ_TIMEOUT_SECONDS = 120L
+        private const val WRITE_TIMEOUT_SECONDS = 120L
+    }
+
+    private val client = OkHttpClient.Builder()
+        .connectTimeout(CONNECT_TIMEOUT_SECONDS, TimeUnit.SECONDS)
+        .readTimeout(READ_TIMEOUT_SECONDS, TimeUnit.SECONDS)
+        .writeTimeout(WRITE_TIMEOUT_SECONDS, TimeUnit.SECONDS)
+        .build()
+
+    /**
+     * Checks if the server is healthy and reachable.
+     *
+     * @param serverUrl The base server URL
+     * @return true if server responds with status "ok"
+     */
+    fun checkHealth(serverUrl: String): Boolean {
+        val request = Request.Builder()
+            .url("$serverUrl/health")
+            .get()
+            .build()
+
+        return try {
+            client.newCall(request).execute().use { response ->
+                if (response.isSuccessful) {
+                    val body = response.body?.string()
+                    val json = JSONObject(body ?: "{}")
+                    json.optString("status") == "ok"
+                } else {
+                    Log.w(TAG, "Health check failed: ${response.code}")
+                    false
+                }
+            }
+        } catch (e: IOException) {
+            Log.e(TAG, "Health check error", e)
+            false
+        }
+    }
+
+    /**
+     * Fetches the server's public key for encryption.
+     *
+     * @param serverUrl The base server URL
+     * @return Base64-encoded public key, or null on failure
+     */
+    fun getPublicKey(serverUrl: String): String? {
+        val request = Request.Builder()
+            .url("$serverUrl/api/v1/public-key")
+            .get()
+            .build()
+
+        return try {
+            client.newCall(request).execute().use { response ->
+                if (response.isSuccessful) {
+                    val body = response.body?.string()
+                    val json = JSONObject(body ?: "{}")
+                    json.optString("public_key", null)
+                } else {
+                    Log.w(TAG, "Get public key failed: ${response.code}")
+                    null
+                }
+            }
+        } catch (e: IOException) {
+            Log.e(TAG, "Get public key error", e)
+            null
+        }
+    }
+
+    /**
+     * Uploads an encrypted recording file to the server.
+     * Verifies the server received the correct data by comparing SHA-256 hashes.
+     *
+     * @param serverUrl The base server URL
+     * @param file The encrypted file to upload
+     * @param apiKey Optional API key for authentication
+     * @return UploadResult indicating success or failure with message
+     */
+    fun uploadRecording(serverUrl: String, file: File, apiKey: String? = null): UploadResult {
+        // Compute hash of file before upload for verification
+        val localHash = computeFileHash(file)
+        if (localHash == null) {
+            Log.e(TAG, "Failed to compute hash for: ${file.name}")
+            return UploadResult(false, "Failed to compute file hash")
+        }
+
+        val mediaType = "application/octet-stream".toMediaType()
+        val requestBody = MultipartBody.Builder()
+            .setType(MultipartBody.FORM)
+            .addFormDataPart(
+                "file",
+                file.name,
+                file.asRequestBody(mediaType)
+            )
+            .build()
+
+        val requestBuilder = Request.Builder()
+            .url("$serverUrl/api/v1/recordings/upload")
+            .post(requestBody)
+
+        if (!apiKey.isNullOrEmpty()) {
+            requestBuilder.addHeader("X-API-Key", apiKey)
+        }
+
+        val request = requestBuilder.build()
+
+        return try {
+            client.newCall(request).execute().use { response ->
+                val body = response.body?.string()
+                if (response.isSuccessful) {
+                    // Verify server received correct data
+                    val json = JSONObject(body ?: "{}")
+                    val serverHash = json.optString("received_hash", "")
+                    val verified = json.optBoolean("verified", false)
+
+                    if (serverHash.isNotEmpty() && serverHash == localHash && verified) {
+                        Log.i(TAG, "Upload verified: ${file.name} (hash: ${localHash.take(8)}...)")
+                        UploadResult(true, "Upload verified", verified = true)
+                    } else if (serverHash.isEmpty()) {
+                        // Legacy server without hash verification
+                        Log.w(TAG, "Upload successful but unverified (no hash): ${file.name}")
+                        UploadResult(true, "Upload successful (unverified)", verified = false)
+                    } else {
+                        Log.e(TAG, "Hash mismatch! Local: $localHash, Server: $serverHash")
+                        UploadResult(false, "Data corruption detected - hash mismatch")
+                    }
+                } else {
+                    val errorMessage = try {
+                        val json = JSONObject(body ?: "{}")
+                        json.optString("detail", "Upload failed: ${response.code}")
+                    } catch (e: Exception) {
+                        "Upload failed: ${response.code}"
+                    }
+                    Log.w(TAG, "Upload failed: $errorMessage")
+                    UploadResult(false, errorMessage)
+                }
+            }
+        } catch (e: IOException) {
+            Log.e(TAG, "Upload error", e)
+            UploadResult(false, "Network error: ${e.message}")
+        }
+    }
+
+    /**
+     * Computes SHA-256 hash of a file.
+     */
+    private fun computeFileHash(file: File): String? {
+        return try {
+            val digest = MessageDigest.getInstance("SHA-256")
+            FileInputStream(file).use { fis ->
+                val buffer = ByteArray(8192)
+                var bytesRead: Int
+                while (fis.read(buffer).also { bytesRead = it } != -1) {
+                    digest.update(buffer, 0, bytesRead)
+                }
+            }
+            digest.digest().joinToString("") { "%02x".format(it) }
+        } catch (e: Exception) {
+            Log.e(TAG, "Hash computation failed", e)
+            null
+        }
+    }
+
+    /**
+     * Lists recordings on the server, optionally filtered by date.
+     *
+     * @param serverUrl The base server URL
+     * @param date Optional date filter in YYYY-MM-DD format
+     * @return List of recording filenames, or null on failure
+     */
+    fun listRecordings(serverUrl: String, date: String? = null): List<String>? {
+        val url = if (date != null) {
+            "$serverUrl/api/v1/recordings?date=$date"
+        } else {
+            "$serverUrl/api/v1/recordings"
+        }
+
+        val request = Request.Builder()
+            .url(url)
+            .get()
+            .build()
+
+        return try {
+            client.newCall(request).execute().use { response ->
+                if (response.isSuccessful) {
+                    val body = response.body?.string()
+                    val json = JSONObject(body ?: "{}")
+                    val recordings = json.optJSONArray("recordings")
+                    if (recordings != null) {
+                        (0 until recordings.length()).map { recordings.getString(it) }
+                    } else {
+                        emptyList()
+                    }
+                } else {
+                    Log.w(TAG, "List recordings failed: ${response.code}")
+                    null
+                }
+            }
+        } catch (e: IOException) {
+            Log.e(TAG, "List recordings error", e)
+            null
+        }
+    }
+
+    data class UploadResult(
+        val success: Boolean,
+        val message: String,
+        val verified: Boolean = false
+    )
+}

clio-android/app/src/main/java/com/example/phonerecorder/crypto/CryptoHelper.kt

@@ -0,0 +1,124 @@
+package com.example.phonerecorder.crypto
+
+import android.util.Log
+import com.goterl.lazysodium.LazySodiumAndroid
+import com.goterl.lazysodium.SodiumAndroid
+import com.goterl.lazysodium.interfaces.Box
+import java.io.File
+import java.io.FileInputStream
+import java.io.FileOutputStream
+import java.io.IOException
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+
+class CryptoHelper(private val keyManager: KeyManager) {
+
+    companion object {
+        private const val TAG = "CryptoHelper"
+
+        // File format constants
+        private val MAGIC_BYTES = byteArrayOf('S'.code.toByte(), 'R'.code.toByte(), 'E'.code.toByte(), 'C'.code.toByte())
+        private const val VERSION: Byte = 1
+        private const val CHUNK_SIZE = 64 * 1024 // 64KB chunks for streaming encryption
+    }
+
+    private val lazySodium: LazySodiumAndroid = LazySodiumAndroid(SodiumAndroid())
+
+    /**
+     * Encrypts a file using libsodium sealed box encryption.
+     *
+     * File format:
+     * [4 bytes: "SREC" magic]
+     * [1 byte: version (1)]
+     * [4 bytes: chunk count (big-endian)]
+     * For each chunk:
+     *   [4 bytes: encrypted length (big-endian)]
+     *   [N bytes: sealed box encrypted data]
+     *
+     * @param inputFile The unencrypted source file
+     * @param outputFile The destination for the encrypted file
+     * @return true if encryption succeeded, false otherwise
+     */
+    fun encryptFile(inputFile: File, outputFile: File): Boolean {
+        val publicKey = keyManager.getPublicKey()
+        if (publicKey == null) {
+            Log.e(TAG, "No public key available for encryption")
+            return false
+        }
+
+        try {
+            FileInputStream(inputFile).use { input ->
+                FileOutputStream(outputFile).use { output ->
+                    // Calculate number of chunks
+                    val fileSize = inputFile.length()
+                    val chunkCount = ((fileSize + CHUNK_SIZE - 1) / CHUNK_SIZE).toInt()
+
+                    // Write header
+                    output.write(MAGIC_BYTES)
+                    output.write(VERSION.toInt())
+                    output.write(intToBytes(chunkCount))
+
+                    // Encrypt and write each chunk
+                    val buffer = ByteArray(CHUNK_SIZE)
+                    var bytesRead: Int
+
+                    while (input.read(buffer).also { bytesRead = it } != -1) {
+                        val chunk = if (bytesRead < CHUNK_SIZE) {
+                            buffer.copyOf(bytesRead)
+                        } else {
+                            buffer
+                        }
+
+                        val encrypted = encryptChunk(chunk, publicKey)
+                        if (encrypted == null) {
+                            Log.e(TAG, "Failed to encrypt chunk")
+                            return false
+                        }
+
+                        // Write encrypted chunk length and data
+                        output.write(intToBytes(encrypted.size))
+                        output.write(encrypted)
+                    }
+                }
+            }
+
+            Log.i(TAG, "Successfully encrypted file: ${inputFile.name} -> ${outputFile.name}")
+            return true
+
+        } catch (e: IOException) {
+            Log.e(TAG, "IO error during encryption", e)
+            return false
+        } catch (e: Exception) {
+            Log.e(TAG, "Unexpected error during encryption", e)
+            return false
+        }
+    }
+
+    /**
+     * Encrypts a single chunk using sealed box encryption.
+     * Sealed box provides anonymous sender encryption using X25519 + XSalsa20-Poly1305.
+     */
+    private fun encryptChunk(data: ByteArray, publicKey: ByteArray): ByteArray? {
+        return try {
+            // Sealed box overhead: crypto_box_SEALBYTES (48 bytes)
+            val ciphertext = ByteArray(data.size + Box.SEALBYTES)
+            val success = lazySodium.cryptoBoxSeal(ciphertext, data, data.size.toLong(), publicKey)
+            if (success) ciphertext else null
+        } catch (e: Exception) {
+            Log.e(TAG, "Encryption failed", e)
+            null
+        }
+    }
+
+    private fun intToBytes(value: Int): ByteArray {
+        return ByteBuffer.allocate(4)
+            .order(ByteOrder.BIG_ENDIAN)
+            .putInt(value)
+            .array()
+    }
+
+    /**
+     * Checks if a public key is available for encryption.
+     */
+    fun hasPublicKey(): Boolean = keyManager.getPublicKey() != null
+}

clio-android/app/src/main/java/com/example/phonerecorder/crypto/KeyManager.kt

@@ -0,0 +1,77 @@
+package com.example.phonerecorder.crypto
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.util.Base64
+import android.util.Log
+import com.goterl.lazysodium.interfaces.Box
+
+class KeyManager(context: Context) {
+
+    companion object {
+        private const val TAG = "KeyManager"
+        private const val PREFS_NAME = "crypto_prefs"
+        private const val KEY_PUBLIC_KEY = "server_public_key"
+        private const val PUBLIC_KEY_LENGTH = Box.PUBLICKEYBYTES // 32 bytes for X25519
+    }
+
+    private val prefs: SharedPreferences = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+
+    /**
+     * Stores the server's public key from a Base64-encoded string.
+     *
+     * @param base64Key The Base64-encoded public key
+     * @return true if the key was valid and stored, false otherwise
+     */
+    fun setPublicKey(base64Key: String): Boolean {
+        return try {
+            val keyBytes = Base64.decode(base64Key.trim(), Base64.DEFAULT)
+            if (keyBytes.size != PUBLIC_KEY_LENGTH) {
+                Log.e(TAG, "Invalid public key length: ${keyBytes.size}, expected $PUBLIC_KEY_LENGTH")
+                return false
+            }
+            prefs.edit().putString(KEY_PUBLIC_KEY, base64Key.trim()).apply()
+            Log.i(TAG, "Server public key stored successfully")
+            true
+        } catch (e: IllegalArgumentException) {
+            Log.e(TAG, "Invalid Base64 encoding for public key", e)
+            false
+        }
+    }
+
+    /**
+     * Retrieves the stored server public key as raw bytes.
+     *
+     * @return The public key bytes, or null if not set
+     */
+    fun getPublicKey(): ByteArray? {
+        val base64Key = prefs.getString(KEY_PUBLIC_KEY, null) ?: return null
+        return try {
+            val keyBytes = Base64.decode(base64Key, Base64.DEFAULT)
+            if (keyBytes.size == PUBLIC_KEY_LENGTH) keyBytes else null
+        } catch (e: IllegalArgumentException) {
+            Log.e(TAG, "Failed to decode stored public key", e)
+            null
+        }
+    }
+
+    /**
+     * Returns the stored public key as a Base64 string for display.
+     */
+    fun getPublicKeyBase64(): String? {
+        return prefs.getString(KEY_PUBLIC_KEY, null)
+    }
+
+    /**
+     * Checks if a public key has been configured.
+     */
+    fun hasPublicKey(): Boolean = getPublicKey() != null
+
+    /**
+     * Clears the stored public key.
+     */
+    fun clearPublicKey() {
+        prefs.edit().remove(KEY_PUBLIC_KEY).apply()
+        Log.i(TAG, "Server public key cleared")
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/sync/NetworkHelper.kt

@@ -0,0 +1,99 @@
+package com.example.phonerecorder.sync
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.Network
+import android.net.NetworkCapabilities
+import android.net.wifi.WifiManager
+import android.util.Log
+import java.net.Inet4Address
+import java.net.NetworkInterface
+
+class NetworkHelper(private val context: Context) {
+
+    companion object {
+        private const val TAG = "NetworkHelper"
+    }
+
+    private val connectivityManager: ConnectivityManager =
+        context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+    private val syncSettings = SyncSettings(context)
+
+    /**
+     * Checks if any network is available.
+     */
+    fun isNetworkAvailable(): Boolean {
+        val network = connectivityManager.activeNetwork ?: return false
+        val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
+        return capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+    }
+
+    /**
+     * Checks if currently connected to WiFi.
+     */
+    fun isOnWifi(): Boolean {
+        val network = connectivityManager.activeNetwork ?: return false
+        val capabilities = connectivityManager.getNetworkCapabilities(network) ?: return false
+        return capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
+    }
+
+    /**
+     * Checks if currently on the configured LAN subnet.
+     * The subnet prefix is configurable in SyncSettings (default: 10.0.0.)
+     */
+    fun isOnLan(): Boolean {
+        if (!isOnWifi()) return false
+
+        try {
+            val ipAddress = getLocalIpAddress()
+            val lanPrefix = syncSettings.lanSubnetPrefix
+            val isLan = ipAddress?.startsWith(lanPrefix) == true
+            Log.d(TAG, "Local IP: $ipAddress, LAN prefix: $lanPrefix, isOnLan: $isLan")
+            return isLan
+        } catch (e: Exception) {
+            Log.e(TAG, "Error checking LAN status", e)
+            return false
+        }
+    }
+
+    /**
+     * Returns the current local IP address (for display/debugging).
+     */
+    fun getCurrentIpAddress(): String? = getLocalIpAddress()
+
+    /**
+     * Gets the local IPv4 address.
+     */
+    private fun getLocalIpAddress(): String? {
+        try {
+            val interfaces = NetworkInterface.getNetworkInterfaces()
+            while (interfaces.hasMoreElements()) {
+                val networkInterface = interfaces.nextElement()
+                if (networkInterface.isLoopback || !networkInterface.isUp) continue
+
+                val addresses = networkInterface.inetAddresses
+                while (addresses.hasMoreElements()) {
+                    val address = addresses.nextElement()
+                    if (address is Inet4Address && !address.isLoopbackAddress) {
+                        return address.hostAddress
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Error getting local IP address", e)
+        }
+        return null
+    }
+
+    /**
+     * Checks if sync should proceed based on current network state and sync mode.
+     */
+    fun shouldSync(syncMode: SyncMode): Boolean {
+        return when (syncMode) {
+            SyncMode.NEVER -> false
+            SyncMode.LAN_ONLY -> isOnLan()
+            SyncMode.WIFI_ONLY -> isOnWifi()
+            SyncMode.ANY_NETWORK -> isNetworkAvailable()
+        }
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/sync/SyncManager.kt

@@ -0,0 +1,189 @@
+package com.example.phonerecorder.sync
+
+import android.content.Context
+import android.util.Log
+import androidx.work.Constraints
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.ExistingWorkPolicy
+import androidx.work.NetworkType
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.PeriodicWorkRequestBuilder
+import androidx.work.WorkManager
+import com.example.phonerecorder.StorageHelper
+import java.util.concurrent.TimeUnit
+
+class SyncManager private constructor(private val context: Context) {
+
+    companion object {
+        private const val TAG = "SyncManager"
+        private const val PERIODIC_SYNC_INTERVAL_MINUTES = 15L
+
+        @Volatile
+        private var instance: SyncManager? = null
+
+        fun getInstance(context: Context): SyncManager {
+            return instance ?: synchronized(this) {
+                instance ?: SyncManager(context.applicationContext).also { instance = it }
+            }
+        }
+    }
+
+    private val workManager = WorkManager.getInstance(context)
+    private val syncSettings = SyncSettings(context)
+    private val syncTracker = SyncTracker(context)
+    private val storageHelper = StorageHelper(context)
+    private val networkHelper = NetworkHelper(context)
+
+    /**
+     * Starts or updates the periodic sync schedule based on current settings.
+     */
+    fun startPeriodicSync() {
+        val syncMode = syncSettings.syncMode
+        if (syncMode == SyncMode.NEVER) {
+            Log.i(TAG, "Sync disabled, cancelling periodic work")
+            workManager.cancelUniqueWork(SyncWorker.WORK_NAME_PERIODIC)
+            return
+        }
+
+        val constraints = buildConstraints(syncMode)
+
+        val periodicWorkRequest = PeriodicWorkRequestBuilder<SyncWorker>(
+            PERIODIC_SYNC_INTERVAL_MINUTES, TimeUnit.MINUTES
+        )
+            .setConstraints(constraints)
+            .build()
+
+        workManager.enqueueUniquePeriodicWork(
+            SyncWorker.WORK_NAME_PERIODIC,
+            ExistingPeriodicWorkPolicy.UPDATE,
+            periodicWorkRequest
+        )
+
+        Log.i(TAG, "Periodic sync scheduled for mode: $syncMode")
+    }
+
+    /**
+     * Stops the periodic sync.
+     */
+    fun stopPeriodicSync() {
+        workManager.cancelUniqueWork(SyncWorker.WORK_NAME_PERIODIC)
+        Log.i(TAG, "Periodic sync stopped")
+    }
+
+    /**
+     * Triggers an immediate sync attempt.
+     */
+    fun scheduleImmediateSync() {
+        val syncMode = syncSettings.syncMode
+        if (syncMode == SyncMode.NEVER) {
+            Log.i(TAG, "Sync disabled, skipping immediate sync")
+            return
+        }
+
+        val constraints = buildConstraints(syncMode)
+
+        val immediateWorkRequest = OneTimeWorkRequestBuilder<SyncWorker>()
+            .setConstraints(constraints)
+            .build()
+
+        workManager.enqueueUniqueWork(
+            SyncWorker.WORK_NAME_IMMEDIATE,
+            ExistingWorkPolicy.REPLACE,
+            immediateWorkRequest
+        )
+
+        Log.i(TAG, "Immediate sync scheduled")
+    }
+
+    /**
+     * Returns the count of files pending sync.
+     */
+    fun getPendingSyncCount(): Int {
+        val syncedFiles = syncTracker.getSyncedFiles()
+        val allFiles = storageHelper.listUnsyncedRecordings(emptySet())
+        return allFiles.count { !syncedFiles.contains(it.name) }
+    }
+
+    /**
+     * Returns the detailed sync status based on current conditions.
+     * @param hasKey Whether the server public key is configured
+     */
+    fun getSyncStatus(hasKey: Boolean): SyncStatus {
+        val syncMode = syncSettings.syncMode
+
+        // Check sync mode first
+        if (syncMode == SyncMode.NEVER) {
+            return SyncStatus.Disabled
+        }
+
+        // Check key
+        if (!hasKey) {
+            return SyncStatus.NoKey
+        }
+
+        // Check network conditions based on mode
+        when (syncMode) {
+            SyncMode.LAN_ONLY -> {
+                if (!networkHelper.isOnWifi()) {
+                    return SyncStatus.NotOnWifi
+                }
+                if (!networkHelper.isOnLan()) {
+                    return SyncStatus.NotOnLan
+                }
+            }
+            SyncMode.WIFI_ONLY -> {
+                if (!networkHelper.isOnWifi()) {
+                    return SyncStatus.NotOnWifi
+                }
+            }
+            SyncMode.ANY_NETWORK -> {
+                if (!networkHelper.isNetworkAvailable()) {
+                    return SyncStatus.NoNetwork
+                }
+            }
+            SyncMode.NEVER -> { /* Already handled above */ }
+        }
+
+        // Network conditions are met, check pending count
+        val pending = getPendingSyncCount()
+        return if (pending > 0) {
+            SyncStatus.Ready(pending)
+        } else {
+            SyncStatus.Synced
+        }
+    }
+
+    /**
+     * Returns the current sync mode.
+     */
+    fun getSyncMode(): SyncMode = syncSettings.syncMode
+
+    /**
+     * Updates the sync mode and restarts periodic sync if needed.
+     */
+    fun setSyncMode(mode: SyncMode) {
+        syncSettings.syncMode = mode
+        startPeriodicSync()
+    }
+
+    private fun buildConstraints(syncMode: SyncMode): Constraints {
+        val builder = Constraints.Builder()
+
+        when (syncMode) {
+            SyncMode.NEVER -> {
+                // Should not reach here, but set impossible constraint
+                builder.setRequiredNetworkType(NetworkType.NOT_REQUIRED)
+            }
+            SyncMode.LAN_ONLY, SyncMode.WIFI_ONLY -> {
+                // Require unmetered (WiFi) connection
+                builder.setRequiredNetworkType(NetworkType.UNMETERED)
+            }
+            SyncMode.ANY_NETWORK -> {
+                // Any connected network
+                builder.setRequiredNetworkType(NetworkType.CONNECTED)
+            }
+        }
+
+        return builder.build()
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/sync/SyncSettings.kt

@@ -0,0 +1,86 @@
+package com.example.phonerecorder.sync
+
+import android.content.Context
+import android.content.SharedPreferences
+
+enum class SyncMode {
+    NEVER,      // Never sync
+    LAN_ONLY,   // Only sync when on LAN (10.0.0.x subnet)
+    WIFI_ONLY,  // Only sync when on WiFi (any network)
+    ANY_NETWORK // Sync on any network (including mobile data)
+}
+
+sealed class SyncStatus {
+    object Disabled : SyncStatus()
+    object NoKey : SyncStatus()
+    object NotOnWifi : SyncStatus()
+    object NotOnLan : SyncStatus()
+    object NoNetwork : SyncStatus()
+    data class Ready(val pending: Int) : SyncStatus()
+    object Synced : SyncStatus()
+}
+
+class SyncSettings(context: Context) {
+
+    companion object {
+        private const val PREFS_NAME = "sync_settings"
+        private const val KEY_SYNC_MODE = "sync_mode"
+        private const val KEY_LAN_SERVER_URL = "lan_server_url"
+        private const val KEY_REMOTE_SERVER_URL = "remote_server_url"
+        private const val KEY_LAN_SUBNET_PREFIX = "lan_subnet_prefix"
+        private const val KEY_API_KEY = "api_key"
+
+        const val DEFAULT_LAN_SERVER_URL = "http://10.0.0.45:8000"
+        const val DEFAULT_REMOTE_SERVER_URL = "https://recordings.hallocks.xyz"
+        const val DEFAULT_LAN_SUBNET_PREFIX = "10.0.0."  // Change this to match your network
+    }
+
+    private val prefs: SharedPreferences = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+
+    var syncMode: SyncMode
+        get() {
+            val ordinal = prefs.getInt(KEY_SYNC_MODE, SyncMode.NEVER.ordinal)
+            return SyncMode.entries.getOrElse(ordinal) { SyncMode.NEVER }
+        }
+        set(value) {
+            prefs.edit().putInt(KEY_SYNC_MODE, value.ordinal).apply()
+        }
+
+    var lanServerUrl: String
+        get() = prefs.getString(KEY_LAN_SERVER_URL, DEFAULT_LAN_SERVER_URL) ?: DEFAULT_LAN_SERVER_URL
+        set(value) {
+            prefs.edit().putString(KEY_LAN_SERVER_URL, value).apply()
+        }
+
+    var remoteServerUrl: String
+        get() = prefs.getString(KEY_REMOTE_SERVER_URL, DEFAULT_REMOTE_SERVER_URL) ?: DEFAULT_REMOTE_SERVER_URL
+        set(value) {
+            prefs.edit().putString(KEY_REMOTE_SERVER_URL, value).apply()
+        }
+
+    /**
+     * The subnet prefix used to detect LAN (e.g., "192.168.1." or "10.0.0.").
+     * Your phone must be on this subnet for LAN mode to work.
+     */
+    var lanSubnetPrefix: String
+        get() = prefs.getString(KEY_LAN_SUBNET_PREFIX, DEFAULT_LAN_SUBNET_PREFIX) ?: DEFAULT_LAN_SUBNET_PREFIX
+        set(value) {
+            prefs.edit().putString(KEY_LAN_SUBNET_PREFIX, value).apply()
+        }
+
+    /**
+     * API key for upload authentication.
+     */
+    var apiKey: String
+        get() = prefs.getString(KEY_API_KEY, "") ?: ""
+        set(value) {
+            prefs.edit().putString(KEY_API_KEY, value).apply()
+        }
+
+    /**
+     * Returns the appropriate server URL based on whether we're on LAN.
+     */
+    fun getServerUrl(isOnLan: Boolean): String {
+        return if (isOnLan) lanServerUrl else remoteServerUrl
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/sync/SyncTracker.kt

@@ -0,0 +1,82 @@
+package com.example.phonerecorder.sync
+
+import android.content.Context
+import android.content.SharedPreferences
+
+class SyncTracker(context: Context) {
+
+    companion object {
+        private const val PREFS_NAME = "sync_tracker"
+        private const val KEY_SYNCED_FILES = "synced_files"
+        private const val SEPARATOR = "|"
+    }
+
+    private val prefs: SharedPreferences = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+
+    /**
+     * Returns the set of filenames that have been successfully synced.
+     */
+    fun getSyncedFiles(): Set<String> {
+        val stored = prefs.getString(KEY_SYNCED_FILES, "") ?: ""
+        return if (stored.isEmpty()) {
+            emptySet()
+        } else {
+            stored.split(SEPARATOR).toSet()
+        }
+    }
+
+    /**
+     * Marks a file as successfully synced.
+     */
+    fun markSynced(filename: String) {
+        val current = getSyncedFiles().toMutableSet()
+        current.add(filename)
+        saveSyncedFiles(current)
+    }
+
+    /**
+     * Marks multiple files as successfully synced.
+     */
+    fun markSynced(filenames: Collection<String>) {
+        val current = getSyncedFiles().toMutableSet()
+        current.addAll(filenames)
+        saveSyncedFiles(current)
+    }
+
+    /**
+     * Checks if a specific file has been synced.
+     */
+    fun isSynced(filename: String): Boolean {
+        return getSyncedFiles().contains(filename)
+    }
+
+    /**
+     * Returns the count of files pending sync.
+     */
+    fun getPendingCount(allFiles: List<String>): Int {
+        val synced = getSyncedFiles()
+        return allFiles.count { !synced.contains(it) }
+    }
+
+    /**
+     * Clears the sync history for a specific file.
+     */
+    fun clearSyncStatus(filename: String) {
+        val current = getSyncedFiles().toMutableSet()
+        current.remove(filename)
+        saveSyncedFiles(current)
+    }
+
+    /**
+     * Clears all sync history.
+     */
+    fun clearAll() {
+        prefs.edit().remove(KEY_SYNCED_FILES).apply()
+    }
+
+    private fun saveSyncedFiles(files: Set<String>) {
+        prefs.edit()
+            .putString(KEY_SYNCED_FILES, files.joinToString(SEPARATOR))
+            .apply()
+    }
+}

clio-android/app/src/main/java/com/example/phonerecorder/sync/SyncWorker.kt

@@ -0,0 +1,104 @@
+package com.example.phonerecorder.sync
+
+import android.content.Context
+import android.util.Log
+import androidx.work.CoroutineWorker
+import androidx.work.WorkerParameters
+import com.example.phonerecorder.StorageHelper
+import com.example.phonerecorder.api.RecordingsApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+class SyncWorker(
+    context: Context,
+    params: WorkerParameters
+) : CoroutineWorker(context, params) {
+
+    companion object {
+        private const val TAG = "SyncWorker"
+        const val WORK_NAME_PERIODIC = "sync_worker_periodic"
+        const val WORK_NAME_IMMEDIATE = "sync_worker_immediate"
+    }
+
+    private val syncSettings = SyncSettings(applicationContext)
+    private val networkHelper = NetworkHelper(applicationContext)
+    private val syncTracker = SyncTracker(applicationContext)
+    private val storageHelper = StorageHelper(applicationContext)
+    private val recordingsApi = RecordingsApi()
+
+    override suspend fun doWork(): Result = withContext(Dispatchers.IO) {
+        Log.i(TAG, "Starting sync work")
+
+        // Check if sync is enabled and conditions are met
+        val syncMode = syncSettings.syncMode
+        if (syncMode == SyncMode.NEVER) {
+            Log.i(TAG, "Sync disabled")
+            return@withContext Result.success()
+        }
+
+        if (!networkHelper.shouldSync(syncMode)) {
+            Log.i(TAG, "Network conditions not met for sync mode: $syncMode")
+            return@withContext Result.retry()
+        }
+
+        // Determine server URL based on sync mode
+        // LAN_ONLY mode uses LAN URL, other modes use remote URL
+        val serverUrl = if (syncMode == SyncMode.LAN_ONLY) {
+            syncSettings.lanServerUrl
+        } else {
+            syncSettings.remoteServerUrl
+        }
+        Log.i(TAG, "Using server: $serverUrl (mode: $syncMode)")
+
+        // Check server health
+        if (!recordingsApi.checkHealth(serverUrl)) {
+            Log.w(TAG, "Server health check failed")
+            return@withContext Result.retry()
+        }
+
+        // Get unsynced files
+        val syncedFiles = syncTracker.getSyncedFiles()
+        val unsyncedFiles = storageHelper.listUnsyncedRecordings(syncedFiles)
+
+        if (unsyncedFiles.isEmpty()) {
+            Log.i(TAG, "No files to sync")
+            return@withContext Result.success()
+        }
+
+        Log.i(TAG, "Found ${unsyncedFiles.size} files to sync")
+
+        var successCount = 0
+        var failCount = 0
+
+        for (file in unsyncedFiles) {
+            // Re-check network conditions before each upload
+            if (!networkHelper.shouldSync(syncMode)) {
+                Log.w(TAG, "Network conditions changed during sync")
+                break
+            }
+
+            val result = recordingsApi.uploadRecording(serverUrl, file, syncSettings.apiKey)
+            if (result.success && result.verified) {
+                // Only mark as synced if server verified the hash
+                syncTracker.markSynced(file.name)
+                successCount++
+                Log.i(TAG, "Synced and verified: ${file.name}")
+            } else if (result.success && !result.verified) {
+                // Upload succeeded but no verification - don't mark as synced, retry later
+                Log.w(TAG, "Upload succeeded but unverified, will retry: ${file.name}")
+                failCount++
+            } else {
+                failCount++
+                Log.w(TAG, "Failed to sync ${file.name}: ${result.message}")
+            }
+        }
+
+        Log.i(TAG, "Sync completed: $successCount succeeded, $failCount failed")
+
+        if (failCount > 0 && successCount == 0) {
+            return@withContext Result.retry()
+        }
+
+        return@withContext Result.success()
+    }
+}

clio-android/app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <!-- Microphone icon -->
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M54,28c-5.5,0 -10,4.5 -10,10v20c0,5.5 4.5,10 10,10s10,-4.5 10,-10v-20c0,-5.5 -4.5,-10 -10,-10z"/>
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M74,58v-8c0,-11 -9,-20 -20,-20s-20,9 -20,20v8h6v-8c0,-7.7 6.3,-14 14,-14s14,6.3 14,14v8h6z"/>
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M51,72v8h6v-8c9.4,-1.2 16.7,-9.2 16.7,-18.7h-6c0,7.5 -6.1,13.7 -13.7,13.7s-13.7,-6.1 -13.7,-13.7h-6c0,9.5 7.3,17.5 16.7,18.7z"/>
+</vector>

clio-android/app/src/main/res/drawable/status_circle.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="@color/recording_stopped" />
+</shape>

clio-android/app/src/main/res/drawable/status_circle_active.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="@color/recording_active" />
+</shape>

clio-android/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,232 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="24dp"
+    tools:context=".MainActivity">
+
+    <!-- Status Indicator -->
+    <View
+        android:id="@+id/statusIndicator"
+        android:layout_width="24dp"
+        android:layout_height="24dp"
+        android:background="@drawable/status_circle"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/statusText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="12dp"
+        android:text="@string/status_stopped"
+        android:textSize="20sp"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toBottomOf="@id/statusIndicator"
+        app:layout_constraintStart_toEndOf="@id/statusIndicator"
+        app:layout_constraintTop_toTopOf="@id/statusIndicator" />
+
+    <!-- Elapsed Time -->
+    <TextView
+        android:id="@+id/elapsedTimeText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:text="00:00:00"
+        android:textSize="48sp"
+        android:textStyle="bold"
+        android:fontFamily="monospace"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/statusIndicator" />
+
+    <!-- Current File -->
+    <TextView
+        android:id="@+id/currentFileText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:ellipsize="middle"
+        android:singleLine="true"
+        android:textSize="14sp"
+        tools:text="Current file: recording_2024-01-15_09-30-00.ogg"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/elapsedTimeText" />
+
+    <!-- Storage Location -->
+    <TextView
+        android:id="@+id/storageLocationText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:textSize="14sp"
+        android:textStyle="bold"
+        tools:text="Storage: SD Card"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/currentFileText" />
+
+    <!-- Storage Info -->
+    <TextView
+        android:id="@+id/storageInfoText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="4dp"
+        android:textSize="14sp"
+        tools:text="Used: 2.5 GB / Available: 28.3 GB"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/storageLocationText" />
+
+    <!-- Battery Info -->
+    <TextView
+        android:id="@+id/batteryInfoText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:textSize="14sp"
+        tools:text="Battery: 85%"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/storageInfoText" />
+
+    <!-- Start/Stop Button -->
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/toggleButton"
+        android:layout_width="200dp"
+        android:layout_height="64dp"
+        android:text="@string/start_recording"
+        android:textSize="18sp"
+        app:cornerRadius="32dp"
+        app:layout_constraintBottom_toTopOf="@id/autoStartSwitch"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/batteryInfoText"
+        app:layout_constraintVertical_bias="0.5" />
+
+    <!-- Auto-start Switch -->
+    <com.google.android.material.switchmaterial.SwitchMaterial
+        android:id="@+id/autoStartSwitch"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:text="@string/auto_start_disabled"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/toggleButton" />
+
+    <!-- Sync Settings Section -->
+    <TextView
+        android:id="@+id/syncSettingsLabel"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="@string/sync_settings_label"
+        android:textSize="14sp"
+        android:textStyle="bold"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/autoStartSwitch" />
+
+    <Spinner
+        android:id="@+id/syncModeSpinner"
+        android:layout_width="0dp"
+        android:layout_height="48dp"
+        android:layout_marginTop="8dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/syncSettingsLabel" />
+
+    <!-- Network Info -->
+    <TextView
+        android:id="@+id/networkInfoText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:textSize="14sp"
+        tools:text="Network: WiFi (192.168.1.42)"
+        app:layout_constraintEnd_toStartOf="@id/configureLanButton"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/syncModeSpinner"
+        app:layout_constraintBottom_toBottomOf="@id/configureLanButton" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/configureLanButton"
+        style="@style/Widget.Material3.Button.TextButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/configure_lan"
+        android:textSize="12sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/syncModeSpinner" />
+
+    <!-- Key Status -->
+    <TextView
+        android:id="@+id/keyStatusText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:textSize="14sp"
+        tools:text="Key: Not configured"
+        app:layout_constraintEnd_toStartOf="@id/importKeyButton"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/configureLanButton"
+        app:layout_constraintBottom_toBottomOf="@id/importKeyButton" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/importKeyButton"
+        style="@style/Widget.Material3.Button.OutlinedButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/import_key_button"
+        android:textSize="12sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/configureLanButton" />
+
+    <!-- Sync Status -->
+    <TextView
+        android:id="@+id/syncStatusText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:textSize="14sp"
+        tools:text="Sync: 3 pending"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/importKeyButton" />
+
+    <!-- Battery Optimization Hint -->
+    <TextView
+        android:id="@+id/batteryOptimizationHint"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:gravity="center"
+        android:text="@string/battery_optimization_hint"
+        android:textColor="@color/warning"
+        android:textSize="12sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/syncStatusText" />
+
+    <!-- Version Info -->
+    <TextView
+        android:id="@+id/versionText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="8dp"
+        android:gravity="center"
+        android:textColor="@android:color/darker_gray"
+        android:textSize="11sp"
+        tools:text="v1.1.0 (build 2026-05-11)"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/batteryOptimizationHint"
+        app:layout_constraintVertical_bias="1.0" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

clio-android/app/src/main/res/mipmap-hdpi/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-hdpi/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-mdpi/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-mdpi/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-xhdpi/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-xxhdpi/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/primary"/>
+    <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+</adaptive-icon>

clio-android/app/src/main/res/values/colors.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="primary">#D32F2F</color>
+    <color name="primary_dark">#B71C1C</color>
+    <color name="accent">#FF5252</color>
+    <color name="recording_active">#4CAF50</color>
+    <color name="recording_stopped">#9E9E9E</color>
+    <color name="warning">#FF9800</color>
+</resources>

clio-android/app/src/main/res/values/strings.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Phone Recorder</string>
+    <string name="status_recording">Recording</string>
+    <string name="status_stopped">Stopped</string>
+    <string name="start_recording">Start Recording</string>
+    <string name="stop_recording">Stop Recording</string>
+    <string name="storage_info">Storage: %1$s used / %2$s available</string>
+    <string name="battery_info">Battery: %1$d%%</string>
+    <string name="current_file">Current file: %1$s</string>
+    <string name="no_file">No file</string>
+    <string name="notification_channel_name">Recording</string>
+    <string name="notification_channel_description">Shows when recording is active</string>
+    <string name="notification_title">Recording in progress</string>
+    <string name="notification_text">Elapsed: %1$s</string>
+    <string name="storage_warning">Low storage! Recording stopped.</string>
+    <string name="storage_location_sd">Storage: SD Card</string>
+    <string name="storage_location_internal">Storage: Internal (SD card not available)</string>
+    <string name="auto_start_enabled">Auto-start on boot: Enabled</string>
+    <string name="auto_start_disabled">Auto-start on boot: Disabled</string>
+    <string name="battery_optimization_title">Battery Optimization</string>
+    <string name="battery_optimization_message">For reliable background recording, disable battery optimization for this app.</string>
+    <string name="battery_optimization_button">Open Settings</string>
+    <string name="battery_optimization_hint">Tip: Disable battery optimization for best reliability</string>
+    <string name="permission_required">Microphone permission is required for recording</string>
+
+    <!-- Sync settings -->
+    <string name="sync_settings_label">Sync Mode</string>
+    <string name="sync_mode_never">Never</string>
+    <string name="sync_mode_lan_only">LAN Only</string>
+    <string name="sync_mode_wifi_only">WiFi Only</string>
+    <string name="sync_mode_any_network">Any Network</string>
+    <string name="sync_status_pending">Sync: %1$d pending</string>
+    <string name="sync_status_disabled">Sync: Disabled</string>
+    <string name="sync_status_no_key">Sync: No server key configured</string>
+    <string name="sync_status_not_on_wifi">Sync: Not on WiFi</string>
+    <string name="sync_status_not_on_lan">Sync: Not on configured LAN</string>
+    <string name="sync_status_no_network">Sync: No network connection</string>
+    <string name="sync_status_synced">Sync: All synced</string>
+    <string name="import_key_button">Import Server Key</string>
+    <string name="import_key_title">Import Server Public Key</string>
+    <string name="import_key_hint">Paste Base64 public key</string>
+    <string name="import_key_success">Server key imported successfully</string>
+    <string name="import_key_error">Invalid key format</string>
+    <string name="key_status_configured">Key: Configured</string>
+    <string name="key_status_not_configured">Key: Not configured</string>
+
+    <!-- Network info -->
+    <string name="network_not_connected">Network: Not connected</string>
+    <string name="network_wifi">Network: WiFi (%1$s)</string>
+    <string name="network_mobile">Network: Mobile data</string>
+    <string name="lan_subnet_label">LAN Subnet</string>
+    <string name="lan_subnet_hint">e.g., 192.168.1. or 10.0.0.</string>
+    <string name="configure_lan">Configure</string>
+    <string name="lan_config_title">LAN Subnet Configuration</string>
+    <string name="lan_config_message">Enter the IP prefix for your home network.\n\nYour current IP: %1$s\n\nCommon examples:\n• 192.168.1.\n• 192.168.0.\n• 10.0.0.</string>
+    <string name="lan_config_saved">LAN subnet saved: %1$s</string>
+</resources>

clio-android/app/src/main/res/values/themes.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.PhoneRecorder" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <item name="colorPrimary">@color/primary</item>
+        <item name="colorPrimaryVariant">@color/primary_dark</item>
+        <item name="colorOnPrimary">@android:color/white</item>
+        <item name="colorSecondary">@color/accent</item>
+        <item name="colorSecondaryVariant">@color/accent</item>
+        <item name="colorOnSecondary">@android:color/white</item>
+    </style>
+</resources>

clio-android/app/src/main/res/xml/file_paths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <external-files-path
+        name="recordings"
+        path="recordings/" />
+</paths>

clio-android/build.gradle.kts

@@ -0,0 +1,4 @@
+plugins {
+    id("com.android.application") version "8.2.0" apply false
+    id("org.jetbrains.kotlin.android") version "1.9.20" apply false
+}

clio-android/description.md

@@ -0,0 +1,136 @@
+# Phone Recorder - Architecture Overview
+
+## Purpose
+
+Android app that records audio continuously, encrypts recordings immediately (never stored unencrypted), and syncs them to a server over LAN or internet.
+
+## Security Model
+
+```
+Phone (has: server public key)     Server (has: private key)
+─────────────────────────────      ────────────────────────
+Record audio → temp.ogg
+Encrypt with public key →
+  recording_*.ogg.enc
+        │
+        └──── HTTP POST ────────→  Receive encrypted file
+                                   Decrypt with private key
+                                   Store as .ogg in recordings/
+```
+
+- **Sealed box encryption**: X25519 key exchange + XSalsa20-Poly1305
+- **Forward secrecy**: Each encryption uses ephemeral keys
+- **Phone never stores unencrypted**: Temp file deleted immediately after encryption
+- **If no public key configured**: Recordings are deleted (security-first design)
+
+## File Format (SREC)
+
+Encrypted files use a chunked format for streaming large files:
+
+```
+[4 bytes: "SREC" magic]
+[1 byte: version (1)]
+[4 bytes: chunk count, big-endian]
+For each chunk (64KB max):
+  [4 bytes: encrypted length, big-endian]
+  [N bytes: sealed box ciphertext]
+```
+
+## Android App Structure
+
+### Main Files
+
+| File | Purpose |
+|------|---------|
+| `MainActivity.kt` | UI, settings, sync controls |
+| `RecordingService.kt` | Foreground service for recording, encryption on stop |
+| `StorageHelper.kt` | File paths, temp vs recordings directories |
+
+### Crypto Package (`crypto/`)
+
+| File | Purpose |
+|------|---------|
+| `CryptoHelper.kt` | SREC format encryption using lazysodium |
+| `KeyManager.kt` | Store/retrieve server public key (SharedPreferences) |
+
+### Sync Package (`sync/`)
+
+| File | Purpose |
+|------|---------|
+| `SyncSettings.kt` | Sync mode enum, server URLs, LAN subnet prefix |
+| `NetworkHelper.kt` | Detect WiFi, LAN (by IP prefix), network availability |
+| `SyncTracker.kt` | Track which files synced successfully (SharedPreferences) |
+| `SyncWorker.kt` | WorkManager background job for uploads |
+| `SyncManager.kt` | Schedule periodic (15min) and immediate syncs |
+
+### API Package (`api/`)
+
+| File | Purpose |
+|------|---------|
+| `RecordingsApi.kt` | OkHttp client, upload with SHA-256 verification |
+
+## Sync Modes
+
+| Mode | Behavior |
+|------|----------|
+| Never | No sync, files stay on phone |
+| LAN Only | Sync only when IP matches configured subnet (e.g., `10.0.0.`) |
+| WiFi Only | Sync on any WiFi network |
+| Any Network | Sync on WiFi or mobile data |
+
+## Server Structure (Python/FastAPI)
+
+| File | Purpose |
+|------|---------|
+| `main.py` | FastAPI endpoints |
+| `crypto.py` | PyNaCl decryption, keypair management |
+| `config.py` | Paths, ports |
+
+### Endpoints
+
+| Endpoint | Method | Description |
+|----------|--------|-------------|
+| `/health` | GET | Returns `{"status": "ok"}` |
+| `/api/v1/public-key` | GET | Returns Base64 public key |
+| `/api/v1/recordings/upload` | POST | Upload encrypted file, returns hash for verification |
+| `/api/v1/recordings` | GET | List decrypted recordings |
+
+## Data Flow
+
+1. **Recording starts**: `RecordingService` writes to `temp/recording_TIMESTAMP.ogg`
+2. **Recording stops**:
+   - `CryptoHelper.encryptFile()` reads temp, writes `recordings/recording_TIMESTAMP.ogg.enc`
+   - Temp file deleted
+   - `SyncManager.scheduleImmediateSync()` triggered
+3. **Sync runs**:
+   - `SyncWorker` checks network conditions match `SyncMode`
+   - Computes SHA-256 of encrypted file
+   - Uploads to server
+   - Server decrypts, returns hash
+   - If hashes match, marks file as synced
+4. **Server storage**: `recordings/YYYY/MM/DD/recording_TIMESTAMP.ogg`
+
+## Key Dependencies
+
+### Android
+- `lazysodium-android` - libsodium bindings
+- `androidx.work` - Background job scheduling
+- `okhttp3` - HTTP client
+
+### Server
+- `fastapi` + `uvicorn` - Web framework
+- `pynacl` - libsodium bindings
+- `aiofiles` - Async file I/O
+
+## Configuration
+
+### Android (in-app settings)
+- Sync mode (Never/LAN/WiFi/Any)
+- LAN subnet prefix (default: `10.0.0.`)
+- Server URLs (LAN and remote)
+- Server public key (Base64)
+
+### Server (config.py or env vars)
+- `HOST` - Bind address (default: 0.0.0.0)
+- `PORT` - Listen port (default: 8000)
+- `BASE_DIR` - Base directory for keys and recordings

clio-android/flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1776877367,
+        "narHash": "sha256-EHq1/OX139R1RvBzOJ0aMRT3xnWyqtHBRUBuO1gFzjI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "0726a0ecb6d4e08f6adced58726b95db924cef57",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

clio-android/flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Phone Recorder Android app development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          config = {
+            allowUnfree = true;
+            android_sdk.accept_license = true;
+          };
+        };
+
+        androidComposition = pkgs.androidenv.composeAndroidPackages {
+          buildToolsVersions = [ "34.0.0" ];
+          platformVersions = [ "34" "33" ];
+          abiVersions = [ "arm64-v8a" "x86_64" ];
+          includeEmulator = false;
+          includeSystemImages = false;
+          includeSources = false;
+          includeNDK = false;
+        };
+
+        androidSdk = androidComposition.androidsdk;
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            android-studio
+            android-tools
+            jdk17
+            androidSdk
+          ];
+
+          ANDROID_HOME = "${androidSdk}/libexec/android-sdk";
+          ANDROID_SDK_ROOT = "${androidSdk}/libexec/android-sdk";
+
+          shellHook = ''
+            echo "Phone Recorder development environment"
+            echo "Run 'android-studio' to launch Android Studio"
+            echo "ANDROID_HOME=$ANDROID_HOME"
+          '';
+        };
+      }
+    );
+}

clio-android/gradle.properties

@@ -0,0 +1,4 @@
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+android.useAndroidX=true
+kotlin.code.style=official
+android.nonTransitiveRClass=true

clio-android/gradlew

@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

clio-android/gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

clio-android/notes.txt

@@ -0,0 +1,14 @@
+./gradlew assembleDebug
+
+  2. Connect your phone (USB debugging enabled) and verify connection:
+  ./android_studio_install_path/platform-tools/adb devices
+
+  3. Install the APK:
+  ./android_studio_install_path/platform-tools/adb install app/build/outputs/apk/debug/app-debug.apk
+
+  Or you can combine build + install in one step:
+  ./gradlew installDebug
+
+  This requires your phone to be connected with USB debugging enabled in Developer Options.
+
+❯ can you add it to the flake?

clio-android/settings.gradle.kts

@@ -0,0 +1,18 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "PhoneRecorder"
+include(":app")

clio-android/todo.md

@@ -0,0 +1,117 @@
+# Phone Recorder - Future Ideas / TODO
+
+## Questions to Address
+
+### Key Rotation
+- What happens when server keypair changes?
+- Current behavior: Old encrypted files can't be decrypted with new key
+- Options:
+  1. Keep old private key archived for decrypting old files
+  2. Sync all files before rotating keys
+  3. Store key version/ID in encrypted file header
+
+### Manual Decryption
+- Document steps to decrypt files copied via USB from phone
+- Need: Python script using server's private key
+- Consider: CLI tool in server/ directory
+
+### No-Key Behavior
+- Current: Deletes recordings if no public key configured (security-first)
+- Alternatives to consider:
+  1. Store unencrypted with warning (less secure)
+  2. Queue recordings until key configured (could fill storage)
+  3. Current behavior is probably correct for security model
+
+---
+
+## Possible Features
+
+### High Priority (if needed)
+- [ ] QR code for key import (avoid email/typing)
+- [ ] Server URL configuration in app UI (currently requires code change for non-defaults)
+- [ ] Manual sync trigger button
+- [ ] View sync history/status in app
+- [ ] **Display last successful sync time on phone** (e.g., "Last sync: 2 hours ago")
+- [ ] **Server status page** - HTML dashboard showing:
+  - When phone last synced
+  - Total recordings count
+  - Recent uploads
+  - Disk space usage
+  - Could be at `/status` or `/dashboard`
+
+### Medium Priority
+- [ ] Configurable recording quality (bitrate, sample rate)
+- [ ] Configurable segment duration (currently 2 hours)
+- [ ] Delete synced files automatically (with configurable retention)
+- [ ] Server: Authentication for upload endpoint
+- [ ] Server: HTTPS with Let's Encrypt
+
+### Audio Analysis & Intelligence
+- [ ] **Speech detection bar** - Visual indicator showing when speech is detected vs silence
+  - Display as additional bar in recording detail view alongside waveform
+  - Data comes from batch processing script
+- [ ] **Sleeping detection** - Detect periods of sleep/silence for overnight recordings
+  - Could help skip to interesting parts
+  - Visual indicator in timeline
+- [ ] **Auto voice recognition / Speaker identification**
+  - Identify who is talking (requires training on voice samples)
+  - Label segments by speaker
+  - Not text-based (transcripts are unreliable)
+- [ ] **Auto highlight generation**
+  - Audio-based detection (not text search since transcripts are bad)
+  - Example: detect phrase patterns like "Ok, note taken" acoustically
+  - Auto-create highlights with tags like "note_taken"
+  - Use audio fingerprinting or keyword spotting models
+
+### Viewer UX
+- [ ] **Background audio playback** - Keep playing current audio while browsing other recordings
+  - Mini player that persists across views
+  - Allows reviewing recordings list while listening
+- [ ] **Highlight duration** - Currently highlights mark only a point; consider adding end time/duration
+- [ ] **Auto-scroll timeline to recordings** - If recordings are only at end of day, auto-scroll so user doesn't have to scroll down to see them
+
+### Low Priority / Nice to Have
+- [ ] Multiple server destinations
+- [ ] Compression before encryption
+- [ ] Resume interrupted uploads
+- [ ] Server: Web UI to browse/play recordings
+- [ ] Server: Transcription integration
+
+### Infrastructure
+- [ ] Systemd service file for server
+- [ ] Docker container for server
+- [ ] NixOS module for server
+- [ ] Backup strategy for server private key
+
+---
+
+## Known Limitations
+
+1. **No streaming encryption**: Entire temp file must complete before encryption
+2. **No partial sync**: If upload fails, whole file retries
+3. **Single server**: Can only sync to one destination at a time
+4. **No authentication**: Anyone who can reach server can upload (relies on encryption for confidentiality)
+
+---
+
+## Testing Notes
+
+### Unit Tests (server/)
+```bash
+python test_crypto.py
+```
+
+### Integration Tests (server/)
+```bash
+# Start server first
+python main.py &
+python test_integration.py
+```
+
+### Manual Testing Checklist
+- [ ] Record short clip, verify .ogg.enc created
+- [ ] Verify temp file deleted after encryption
+- [ ] Check sync triggers after recording stops
+- [ ] Verify hash verification (corrupt a file, see it retry)
+- [ ] Test LAN detection with different subnets
+- [ ] Test sync mode transitions

clio-api/.gitignore

@@ -0,0 +1,10 @@
+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv

clio-api/.python-version

@@ -0,0 +1 @@
+3.13

clio-api/nixos/Caddyfile

@@ -0,0 +1,46 @@
+# Caddyfile snippet for phone-recorder
+# Add this to your global /etc/caddy/Caddyfile
+#
+# Caddy will automatically obtain and renew HTTPS certificates
+
+recordings.hallocks.xyz {
+    # Proxy everything to FastAPI
+    reverse_proxy localhost:8000
+
+    # Security headers
+    header {
+        X-Content-Type-Options nosniff
+        X-Frame-Options SAMEORIGIN
+        Referrer-Policy strict-origin-when-cross-origin
+        -Server
+    }
+
+    # Logging for fail2ban
+    log {
+        output file /var/log/caddy/recordings.log {
+            roll_size 10mb
+            roll_keep 5
+        }
+        format json
+    }
+}
+
+# ============================================================
+# Other services (for reference when setting them back up):
+# ============================================================
+
+# todo.hallocks.xyz {
+#     reverse_proxy localhost:3456  # Vikunja
+#     log {
+#         output file /var/log/caddy/todo.log
+#         format json
+#     }
+# }
+
+# passwords.hallocks.xyz {
+#     reverse_proxy localhost:8080  # Vaultwarden
+#     log {
+#         output file /var/log/caddy/passwords.log
+#         format json
+#     }
+# }

clio-api/nixos/phone-recorder.nix

@@ -0,0 +1,182 @@
+# NixOS module for phone-recorder server
+# Add to your configuration.nix imports or use as a standalone module
+#
+# Usage in configuration.nix:
+#   imports = [ ./phone-recorder.nix ];
+#   services.phone-recorder.enable = true;
+
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.phone-recorder;
+in
+{
+  options.services.phone-recorder = {
+    enable = lib.mkEnableOption "Phone Recorder server";
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 8000;
+      description = "Port for the API server";
+    };
+
+    dataDir = lib.mkOption {
+      type = lib.types.path;
+      default = "/var/lib/phone-recorder";
+      description = "Directory for recordings and database";
+    };
+
+    user = lib.mkOption {
+      type = lib.types.str;
+      default = "phone-recorder";
+      description = "User to run the service as";
+    };
+
+    domain = lib.mkOption {
+      type = lib.types.str;
+      default = "recordings.hallocks.xyz";
+      description = "Domain for HTTPS access";
+    };
+
+    enableCaddy = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Enable Caddy reverse proxy with automatic HTTPS";
+    };
+
+    enableFail2ban = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Enable fail2ban protection";
+    };
+
+    sourceDir = lib.mkOption {
+      type = lib.types.path;
+      default = /home/thallock/phone-recorder;
+      description = "Path to the server source code";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Create user and group
+    users.users.${cfg.user} = {
+      isSystemUser = true;
+      group = cfg.user;
+      home = cfg.dataDir;
+      createHome = true;
+    };
+    users.groups.${cfg.user} = {};
+
+    # Systemd service
+    systemd.services.phone-recorder = {
+      description = "Phone Recorder API Server";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      environment = {
+        HOST = "127.0.0.1";  # Only listen locally, Caddy handles external
+        PORT = toString cfg.port;
+        BASE_DIR = toString cfg.sourceDir;
+        RECORDINGS_DIR = "${cfg.dataDir}/recordings";
+        DATABASE_PATH = "${cfg.dataDir}/recordings.db";
+      };
+
+      serviceConfig = {
+        Type = "simple";
+        User = cfg.user;
+        Group = cfg.user;
+        WorkingDirectory = cfg.sourceDir;
+        ExecStart = "${pkgs.uv}/bin/uv run python main.py";
+        Restart = "always";
+        RestartSec = 5;
+
+        # Hardening
+        NoNewPrivileges = true;
+        ProtectSystem = "strict";
+        ProtectHome = "read-only";
+        PrivateTmp = true;
+        ReadWritePaths = [ cfg.dataDir ];
+      };
+
+      preStart = ''
+        mkdir -p ${cfg.dataDir}/recordings
+        mkdir -p ${cfg.dataDir}/keys
+      '';
+    };
+
+    # Caddy reverse proxy
+    services.caddy = lib.mkIf cfg.enableCaddy {
+      enable = true;
+      virtualHosts = {
+        "${cfg.domain}" = {
+          extraConfig = ''
+            # API endpoints
+            handle /api/* {
+              reverse_proxy localhost:${toString cfg.port}
+            }
+            handle /health {
+              reverse_proxy localhost:${toString cfg.port}
+            }
+
+            # Static frontend (if you have one)
+            handle {
+              root * /var/www/recordings-viewer
+              file_server
+              try_files {path} /index.html
+            }
+
+            # Security headers
+            header {
+              X-Content-Type-Options nosniff
+              X-Frame-Options DENY
+              Referrer-Policy strict-origin-when-cross-origin
+            }
+
+            # Rate limiting for uploads
+            @upload path /api/v1/recordings/upload
+            handle @upload {
+              rate_limit {remote.ip} 10r/m
+              reverse_proxy localhost:${toString cfg.port}
+            }
+
+            # Logging
+            log {
+              output file /var/log/caddy/recordings.log
+              format json
+            }
+          '';
+        };
+      };
+    };
+
+    # Open firewall
+    networking.firewall.allowedTCPPorts = [ 80 443 ]
+      ++ lib.optional (!cfg.enableCaddy) cfg.port;
+
+    # Fail2ban
+    services.fail2ban = lib.mkIf cfg.enableFail2ban {
+      enable = true;
+      maxretry = 5;
+      bantime = "1h";
+
+      jails = {
+        caddy-auth = lib.mkIf cfg.enableCaddy ''
+          enabled = true
+          filter = caddy-auth
+          logpath = /var/log/caddy/recordings.log
+          maxretry = 5
+          bantime = 3600
+        '';
+      };
+    };
+
+    # Fail2ban filter for Caddy
+    environment.etc."fail2ban/filter.d/caddy-auth.conf" = lib.mkIf (cfg.enableFail2ban && cfg.enableCaddy) {
+      text = ''
+        [Definition]
+        failregex = ^.*"remote_ip":"<HOST>".*"status":40[13].*$
+        ignoreregex =
+      '';
+    };
+  };
+}

clio-api/nixos/phone-recorder.service

@@ -0,0 +1,33 @@
+# Systemd service file for phone-recorder
+# Copy to /etc/systemd/system/phone-recorder.service
+# Then: systemctl daemon-reload && systemctl enable --now phone-recorder
+
+[Unit]
+Description=Phone Recorder API Server
+After=network.target local-fs.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=thallock
+Group=thallock
+WorkingDirectory=/work/hosting/recordings
+
+# Paths
+Environment="HOST=0.0.0.0"
+Environment="PORT=8000"
+Environment="BASE_DIR=/work/hosting/recordings"
+Environment="RECORDINGS_DIR=/media/external/Hosting/Recordings"
+Environment="DATABASE_PATH=/work/hosting/recordings/data/recordings.db"
+Environment="KEYS_DIR=/work/hosting/recordings/data/keys"
+
+ExecStart=/home/thallock/.local/bin/uv run python main.py
+Restart=always
+RestartSec=5
+
+# Hardening
+NoNewPrivileges=true
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target

clio-infra/ARCHITECTURE.md

@@ -0,0 +1,126 @@
+# Clio - Architecture Overview
+
+## Purpose
+
+Multi-device audio recording system with end-to-end encryption. Records continuously on phone and portable devices, encrypts immediately, syncs to central server, transcribes with GPU, and provides a web interface for search and highlights.
+
+## Components
+
+| Repository | Purpose | Deployment Target |
+|------------|---------|-------------------|
+| clio-api | FastAPI server, recordings DB, highlights | Server (10.0.0.45) |
+| clio-android | Android recording app | Phone (manual APK) |
+| clio-ui | React viewer frontend | Server (10.0.0.45) |
+| clio-ai | Whisper transcription, wake word detection | Desktop (10.0.0.130) |
+| clio-infra | Deployment configs, docs, NixOS modules | All |
+
+## Security Model
+
+```
+Phone (has: server public key)     Server (has: private key)
+─────────────────────────────      ────────────────────────
+Record audio → temp.ogg
+Encrypt with public key →
+  recording_*.ogg.enc
+        │
+        └──── HTTP POST ────────→  Receive encrypted file
+                                   Decrypt with private key
+                                   Store as .ogg in recordings/
+```
+
+- **Sealed box encryption**: X25519 key exchange + XSalsa20-Poly1305
+- **Forward secrecy**: Each encryption uses ephemeral keys
+- **Phone never stores unencrypted**: Temp file deleted immediately after encryption
+- **If no public key configured**: Recordings are deleted (security-first design)
+
+## File Format (SREC)
+
+Encrypted files use a chunked format for streaming large files:
+
+```
+[4 bytes: "SREC" magic]
+[1 byte: version (1)]
+[4 bytes: chunk count, big-endian]
+For each chunk (64KB max):
+  [4 bytes: encrypted length, big-endian]
+  [N bytes: sealed box ciphertext]
+```
+
+## Data Flow
+
+```
+1. Recording
+   Phone/Pi → temp.ogg → encrypt → recording_*.ogg.enc
+
+2. Sync
+   Phone/Pi → HTTP POST → Server decrypts → recordings/YYYY/MM/DD/*.ogg
+
+3. Transcription (async, on desktop)
+   Desktop pulls recordings → Whisper → JSON segments → POST to server
+
+4. Viewing
+   Browser → clio-ui → clio-api → recordings + transcripts + highlights
+```
+
+## API Endpoints (clio-api)
+
+| Endpoint | Method | Description |
+|----------|--------|-------------|
+| `/health` | GET | Health check |
+| `/api/v1/public-key` | GET | Server public key (Base64) |
+| `/api/v1/recordings/upload` | POST | Upload encrypted file |
+| `/api/v1/recordings` | GET | List recordings with transcripts |
+| `/api/v1/recordings/{id}` | GET | Recording details |
+| `/api/v1/recordings/{id}/audio` | GET | Stream audio file |
+| `/api/v1/import/transcription` | POST | Import transcription JSON |
+| `/api/v1/highlights` | GET/POST | Manage highlights |
+| `/api/v1/sources` | GET | List recording sources |
+
+## Database Schema
+
+**recordings**: id, source_name, audio_path, duration, language, recorded_at, transcribed_at
+**segments**: id, recording_id, start_time, end_time, text, confidence
+**highlights**: id, recording_id, start_seconds, end_seconds, tag, note, created_at
+
+## Sync Modes (Android)
+
+| Mode | Behavior |
+|------|----------|
+| Never | No sync, files stay on phone |
+| LAN Only | Sync only when IP matches subnet (e.g., `10.0.0.`) |
+| WiFi Only | Sync on any WiFi network |
+| Any Network | Sync on WiFi or mobile data |
+
+## Hosts & Paths
+
+### Server (10.0.0.45)
+- Code: `/work/hosting/recordings`
+- Audio: `/media/external/Hosting/Recordings`
+- Database: `/work/hosting/recordings/data/recordings.db`
+- Frontend: `/var/www/recordings-viewer`
+- Domain: `recordings.hallocks.xyz`
+
+### Desktop (10.0.0.130)
+- Transcription scripts
+- Real-time wake word detection
+- GPU: RTX 3090
+
+## Dependencies
+
+### clio-api (Python)
+- fastapi, uvicorn
+- pynacl (libsodium)
+- aiofiles
+- sqlite3
+
+### clio-android (Kotlin)
+- lazysodium-android
+- androidx.work
+- okhttp3
+
+### clio-ai (Python)
+- faster-whisper
+- torch, torchaudio
+- sounddevice
+- webrtcvad
+- scikit-learn

clio-infra/TODO.md

@@ -0,0 +1,153 @@
+# Clio - Consolidated TODO
+
+## Architecture Overview
+
+```
+┌─────────────────────────────────────────────────────────────────────────┐
+│                          TARGET ARCHITECTURE                            │
+├─────────────────────────────────────────────────────────────────────────┤
+│                                                                         │
+│   ┌──────────┐        ┌──────────────────────────────────────────────┐  │
+│   │  Phone   │───────▶│         Server (10.0.0.45)                   │  │
+│   │ (Android)│  push  │  - Storage hub (recordings)                  │  │
+│   └──────────┘        │  - clio-api (FastAPI)                        │  │
+│                       │  - clio-ui (React frontend)                  │  │
+│   ┌──────────┐        │  - Database (highlights, transcripts)        │  │
+│   │    Pi    │───────▶│  - Forgejo (code.hallocks.xyz)               │  │
+│   │(portable)│  push  └──────────────────────────────────────────────┘  │
+│   └──────────┘                           │                              │
+│                                          │ pulls recordings             │
+│                                          ▼                              │
+│                       ┌──────────────────────────────────────────────┐  │
+│                       │       Desktop (10.0.0.130)                   │  │
+│                       │  - GPU: RTX 3090                             │  │
+│                       │  - clio-ai/transcription (Whisper)           │  │
+│                       │  - clio-ai/real_time (wake word detection)   │  │
+│                       │  - Off at night (non-critical)               │  │
+│                       └──────────────────────────────────────────────┘  │
+│                                                                         │
+└─────────────────────────────────────────────────────────────────────────┘
+```
+
+## Immediate Tasks
+
+### Infrastructure Setup
+- [x] Import Pi recorder code (systemd setup) → clio-pi/
+- [ ] Migrate ~100s GB of recordings from Pi to server storage
+- [ ] Pi: Add sync script to push recordings to server
+- [ ] Pi: Auto-detect audio device (currently hardcoded to hw:1)
+- [ ] Set up Forgejo repos for all clio-* projects
+- [ ] Configure Forgejo Actions for server deployments (10.0.0.45)
+- [ ] Create backup strategy for viewer, highlights, and database
+
+### Deployment Pipeline
+- [ ] clio-api: Forgejo Actions → deploy to 10.0.0.45
+- [ ] clio-ui: Forgejo Actions → deploy to 10.0.0.45:/var/www/recordings-viewer
+- [ ] clio-ai: Manual deploy to desktop (10.0.0.130) - not via Actions
+
+---
+
+## Feature Backlog
+
+### High Priority
+- [ ] QR code for key import (avoid email/typing)
+- [ ] Server URL configuration in app UI
+- [ ] Manual sync trigger button
+- [ ] View sync history/status in app
+- [ ] Display last successful sync time on phone
+- [ ] Server status page/dashboard:
+  - When phone/pi last synced
+  - Total recordings count
+  - Recent uploads
+  - Disk space usage
+
+### Wake Word / Voice Recognition (clio-ai)
+- [ ] Manage wake words in UI (currently hardcoded)
+- [ ] Centralize voice recognition training data
+- [ ] Real-time detection improvements (currently sucks even on desktop)
+- [ ] Future: Real-time detection on phone/pi (low priority)
+
+### Audio Analysis & Intelligence
+- [ ] Speech detection bar in recording detail view
+- [ ] Sleeping/silence detection for overnight recordings
+- [ ] Auto voice recognition / speaker identification
+- [ ] Auto highlight generation (audio-based, not text search)
+
+### Viewer UX
+- [ ] Background audio playback (mini player across views)
+- [ ] Highlight duration (currently point-only, add end time)
+- [ ] Auto-scroll timeline to recordings
+
+### Medium Priority
+- [ ] Configurable recording quality (bitrate, sample rate)
+- [ ] Configurable segment duration (currently 2 hours)
+- [ ] Delete synced files automatically (with retention)
+- [ ] Server authentication for upload endpoint
+- [ ] Server HTTPS with Let's Encrypt (partially done via Caddy)
+
+### Low Priority / Nice to Have
+- [ ] Multiple server destinations
+- [ ] Compression before encryption
+- [ ] Resume interrupted uploads
+- [ ] Docker container for server
+
+---
+
+## Questions to Resolve
+
+### Key Rotation
+- What happens when server keypair changes?
+- Options:
+  1. Keep old private key archived
+  2. Sync all files before rotating
+  3. Store key version in encrypted file header
+
+### Manual Decryption
+- Document steps to decrypt files copied via USB
+- CLI tool needed
+
+### Desktop Worker Architecture
+- How does desktop pull recordings from server?
+- How does it push transcriptions back?
+- Queue system needed?
+
+---
+
+## Known Limitations
+
+1. **No streaming encryption**: Entire temp file must complete before encryption
+2. **No partial sync**: If upload fails, whole file retries
+3. **Single server**: Can only sync to one destination at a time
+4. **No authentication**: Relies on encryption for confidentiality
+5. **Desktop off at night**: Real-time detection unavailable
+
+---
+
+## Repository Structure
+
+```
+/work/projects/clio/
+├── clio-api/          # FastAPI server (recordings, highlights, transcripts)
+├── clio-android/      # Android recording app
+├── clio-ui/           # React frontend (viewer)
+├── clio-ai/           # ML/AI components
+│   ├── real_time/     # Wake word detection, voice classifier
+│   └── transcription/ # Whisper transcription scripts
+├── clio-pi/           # Raspberry Pi recorder
+│   ├── bin/           # Recording scripts
+│   ├── systemd/       # Service units
+│   └── setup.sh       # Pi setup script
+└── clio-infra/        # Deployment, configs, docs
+    ├── nixos/         # NixOS modules
+    ├── scripts/       # Deploy scripts
+    └── TODO.md        # This file
+```
+
+## Hosts
+
+| Host | IP | Role |
+|------|-----|------|
+| Server | 10.0.0.45 | Storage, API, UI, Forgejo |
+| Desktop | 10.0.0.130 | GPU transcription, real-time detection |
+| Phone | (mobile) | Recording source |
+| Pi | (TBD) | Portable recording source |

clio-infra/nixos/Caddyfile

@@ -0,0 +1,46 @@
+# Caddyfile snippet for phone-recorder
+# Add this to your global /etc/caddy/Caddyfile
+#
+# Caddy will automatically obtain and renew HTTPS certificates
+
+recordings.hallocks.xyz {
+    # Proxy everything to FastAPI
+    reverse_proxy localhost:8000
+
+    # Security headers
+    header {
+        X-Content-Type-Options nosniff
+        X-Frame-Options SAMEORIGIN
+        Referrer-Policy strict-origin-when-cross-origin
+        -Server
+    }
+
+    # Logging for fail2ban
+    log {
+        output file /var/log/caddy/recordings.log {
+            roll_size 10mb
+            roll_keep 5
+        }
+        format json
+    }
+}
+
+# ============================================================
+# Other services (for reference when setting them back up):
+# ============================================================
+
+# todo.hallocks.xyz {
+#     reverse_proxy localhost:3456  # Vikunja
+#     log {
+#         output file /var/log/caddy/todo.log
+#         format json
+#     }
+# }
+
+# passwords.hallocks.xyz {
+#     reverse_proxy localhost:8080  # Vaultwarden
+#     log {
+#         output file /var/log/caddy/passwords.log
+#         format json
+#     }
+# }

clio-infra/nixos/phone-recorder.nix

@@ -0,0 +1,182 @@
+# NixOS module for phone-recorder server
+# Add to your configuration.nix imports or use as a standalone module
+#
+# Usage in configuration.nix:
+#   imports = [ ./phone-recorder.nix ];
+#   services.phone-recorder.enable = true;
+
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.phone-recorder;
+in
+{
+  options.services.phone-recorder = {
+    enable = lib.mkEnableOption "Phone Recorder server";
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 8000;
+      description = "Port for the API server";
+    };
+
+    dataDir = lib.mkOption {
+      type = lib.types.path;
+      default = "/var/lib/phone-recorder";
+      description = "Directory for recordings and database";
+    };
+
+    user = lib.mkOption {
+      type = lib.types.str;
+      default = "phone-recorder";
+      description = "User to run the service as";
+    };
+
+    domain = lib.mkOption {
+      type = lib.types.str;
+      default = "recordings.hallocks.xyz";
+      description = "Domain for HTTPS access";
+    };
+
+    enableCaddy = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Enable Caddy reverse proxy with automatic HTTPS";
+    };
+
+    enableFail2ban = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Enable fail2ban protection";
+    };
+
+    sourceDir = lib.mkOption {
+      type = lib.types.path;
+      default = /home/thallock/phone-recorder;
+      description = "Path to the server source code";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # Create user and group
+    users.users.${cfg.user} = {
+      isSystemUser = true;
+      group = cfg.user;
+      home = cfg.dataDir;
+      createHome = true;
+    };
+    users.groups.${cfg.user} = {};
+
+    # Systemd service
+    systemd.services.phone-recorder = {
+      description = "Phone Recorder API Server";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      environment = {
+        HOST = "127.0.0.1";  # Only listen locally, Caddy handles external
+        PORT = toString cfg.port;
+        BASE_DIR = toString cfg.sourceDir;
+        RECORDINGS_DIR = "${cfg.dataDir}/recordings";
+        DATABASE_PATH = "${cfg.dataDir}/recordings.db";
+      };
+
+      serviceConfig = {
+        Type = "simple";
+        User = cfg.user;
+        Group = cfg.user;
+        WorkingDirectory = cfg.sourceDir;
+        ExecStart = "${pkgs.uv}/bin/uv run python main.py";
+        Restart = "always";
+        RestartSec = 5;
+
+        # Hardening
+        NoNewPrivileges = true;
+        ProtectSystem = "strict";
+        ProtectHome = "read-only";
+        PrivateTmp = true;
+        ReadWritePaths = [ cfg.dataDir ];
+      };
+
+      preStart = ''
+        mkdir -p ${cfg.dataDir}/recordings
+        mkdir -p ${cfg.dataDir}/keys
+      '';
+    };
+
+    # Caddy reverse proxy
+    services.caddy = lib.mkIf cfg.enableCaddy {
+      enable = true;
+      virtualHosts = {
+        "${cfg.domain}" = {
+          extraConfig = ''
+            # API endpoints
+            handle /api/* {
+              reverse_proxy localhost:${toString cfg.port}
+            }
+            handle /health {
+              reverse_proxy localhost:${toString cfg.port}
+            }
+
+            # Static frontend (if you have one)
+            handle {
+              root * /var/www/recordings-viewer
+              file_server
+              try_files {path} /index.html
+            }
+
+            # Security headers
+            header {
+              X-Content-Type-Options nosniff
+              X-Frame-Options DENY
+              Referrer-Policy strict-origin-when-cross-origin
+            }
+
+            # Rate limiting for uploads
+            @upload path /api/v1/recordings/upload
+            handle @upload {
+              rate_limit {remote.ip} 10r/m
+              reverse_proxy localhost:${toString cfg.port}
+            }
+
+            # Logging
+            log {
+              output file /var/log/caddy/recordings.log
+              format json
+            }
+          '';
+        };
+      };
+    };
+
+    # Open firewall
+    networking.firewall.allowedTCPPorts = [ 80 443 ]
+      ++ lib.optional (!cfg.enableCaddy) cfg.port;
+
+    # Fail2ban
+    services.fail2ban = lib.mkIf cfg.enableFail2ban {
+      enable = true;
+      maxretry = 5;
+      bantime = "1h";
+
+      jails = {
+        caddy-auth = lib.mkIf cfg.enableCaddy ''
+          enabled = true
+          filter = caddy-auth
+          logpath = /var/log/caddy/recordings.log
+          maxretry = 5
+          bantime = 3600
+        '';
+      };
+    };
+
+    # Fail2ban filter for Caddy
+    environment.etc."fail2ban/filter.d/caddy-auth.conf" = lib.mkIf (cfg.enableFail2ban && cfg.enableCaddy) {
+      text = ''
+        [Definition]
+        failregex = ^.*"remote_ip":"<HOST>".*"status":40[13].*$
+        ignoreregex =
+      '';
+    };
+  };
+}

clio-infra/nixos/phone-recorder.service

@@ -0,0 +1,33 @@
+# Systemd service file for phone-recorder
+# Copy to /etc/systemd/system/phone-recorder.service
+# Then: systemctl daemon-reload && systemctl enable --now phone-recorder
+
+[Unit]
+Description=Phone Recorder API Server
+After=network.target local-fs.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=thallock
+Group=thallock
+WorkingDirectory=/work/hosting/recordings
+
+# Paths
+Environment="HOST=0.0.0.0"
+Environment="PORT=8000"
+Environment="BASE_DIR=/work/hosting/recordings"
+Environment="RECORDINGS_DIR=/media/external/Hosting/Recordings"
+Environment="DATABASE_PATH=/work/hosting/recordings/data/recordings.db"
+Environment="KEYS_DIR=/work/hosting/recordings/data/keys"
+
+ExecStart=/home/thallock/.local/bin/uv run python main.py
+Restart=always
+RestartSec=5
+
+# Hardening
+NoNewPrivileges=true
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target

clio-infra/scripts/deploy-api-server.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Deployment script for phone-recorder server
+# Target: thallock@10.0.0.45 (SSH port 2252)
+#
+# Paths on server:
+#   Code:       /work/hosting/recordings
+#   Data (db):  /work/hosting/recordings/data
+#   Audio:      /media/external/Hosting/Recordings
+
+SERVER_HOST="10.0.0.45"
+SERVER_USER="thallock"
+SERVER_PORT="2252"
+CODE_DIR="/work/hosting/recordings"
+DATA_DIR="/work/hosting/recordings/data"
+AUDIO_DIR="/media/external/Hosting/Recordings"
+
+SSH_OPTS="-p ${SERVER_PORT}"
+SSH_CMD="ssh ${SSH_OPTS} ${SERVER_USER}@${SERVER_HOST}"
+RSYNC_SSH="ssh -p ${SERVER_PORT}"
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+echo "=== Deploying phone-recorder server to ${SERVER_USER}@${SERVER_HOST} ==="
+
+# Sync server code (excluding local data)
+echo "Syncing server code..."
+rsync -avz --delete \
+    --exclude '.venv' \
+    --exclude '__pycache__' \
+    --exclude '*.pyc' \
+    --exclude 'recordings/' \
+    --exclude 'recordings.db' \
+    --exclude 'keys/' \
+    --exclude 'data/' \
+    --exclude '.git' \
+    --exclude 'nixos/' \
+    -e "${RSYNC_SSH}" \
+    "${SCRIPT_DIR}/" \
+    "${SERVER_USER}@${SERVER_HOST}:${CODE_DIR}/"
+
+echo "Setting up on remote server..."
+${SSH_CMD} bash << REMOTE_SCRIPT
+set -euo pipefail
+
+# Create directories
+mkdir -p ${DATA_DIR}/keys
+mkdir -p ${AUDIO_DIR}
+
+cd ${CODE_DIR}
+
+# Sync dependencies
+echo "Syncing Python dependencies..."
+uv sync
+
+echo ""
+echo "=== Server code deployed ==="
+echo "Code:  ${CODE_DIR}"
+echo "Data:  ${DATA_DIR}"
+echo "Audio: ${AUDIO_DIR}"
+echo ""
+echo "To install/update systemd service:"
+echo "  sudo cp ${CODE_DIR}/nixos/phone-recorder.service /etc/systemd/system/"
+echo "  sudo systemctl daemon-reload"
+echo "  sudo systemctl enable --now phone-recorder"
+echo ""
+echo "To check status:"
+echo "  sudo systemctl status phone-recorder"
+echo "  curl http://localhost:8000/health"
+REMOTE_SCRIPT
+
+echo ""
+echo "=== Deployment complete ==="

clio-infra/scripts/deploy-api.sh

@@ -0,0 +1,15 @@
+#!/run/current-system/sw/bin/fish
+
+rsync -avz --delete \
+      --exclude '.venv' --exclude '__pycache__' --exclude '*.pyc' \
+      --exclude 'recordings/' --exclude 'recordings.db' --exclude 'keys/' \
+      --exclude 'data/' --exclude '.git' \
+      -e 'ssh -p 2252' \
+      /work/projects/phone_recorder/claude/server/ \
+      thallock@10.0.0.45:/work/hosting/recordings/
+
+  # Deploy React frontend
+rsync -avz --delete \
+      -e 'ssh -p 2252' \
+      /work/projects/view_recordings/designer_export/ \
+      thallock@10.0.0.45:/work/hosting/recordings-viewer/

clio-infra/scripts/deploy.sh

@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Clio deployment script
+# Deploys clio-api and clio-ui to server (10.0.0.45)
+#
+# Usage: ./deploy.sh [api|ui|all]
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CLIO_ROOT="$(dirname "$(dirname "$SCRIPT_DIR")")"
+
+SERVER_HOST="10.0.0.45"
+SERVER_USER="thallock"
+SERVER_PORT="2252"
+
+# Server paths
+API_CODE_DIR="/work/hosting/recordings"
+UI_DIR="/work/hosting/recordings-viewer"
+
+SSH_OPTS="-p ${SERVER_PORT}"
+SSH_CMD="ssh ${SSH_OPTS} ${SERVER_USER}@${SERVER_HOST}"
+RSYNC_SSH="ssh -p ${SERVER_PORT}"
+
+deploy_api() {
+    echo "=== Deploying clio-api ==="
+    rsync -avz --delete \
+        --exclude '.venv' \
+        --exclude '__pycache__' \
+        --exclude '*.pyc' \
+        --exclude 'recordings/' \
+        --exclude 'recordings.db' \
+        --exclude 'keys/' \
+        --exclude 'data/' \
+        --exclude '.git' \
+        --exclude 'nixos/' \
+        -e "${RSYNC_SSH}" \
+        "${CLIO_ROOT}/clio-api/" \
+        "${SERVER_USER}@${SERVER_HOST}:${API_CODE_DIR}/"
+
+    echo "Running uv sync on server..."
+    ${SSH_CMD} "cd ${API_CODE_DIR} && uv sync"
+    echo "clio-api deployed."
+}
+
+deploy_ui() {
+    echo "=== Deploying clio-ui ==="
+    rsync -avz --delete \
+        -e "${RSYNC_SSH}" \
+        "${CLIO_ROOT}/clio-ui/" \
+        "${SERVER_USER}@${SERVER_HOST}:${UI_DIR}/"
+    echo "clio-ui deployed."
+}
+
+case "${1:-all}" in
+    api)
+        deploy_api
+        ;;
+    ui)
+        deploy_ui
+        ;;
+    all)
+        deploy_api
+        deploy_ui
+        ;;
+    *)
+        echo "Usage: $0 [api|ui|all]"
+        exit 1
+        ;;
+esac
+
+echo ""
+echo "=== Deployment complete ==="
+echo ""
+echo "To restart the API service:"
+echo "  ssh -p ${SERVER_PORT} ${SERVER_USER}@${SERVER_HOST} 'sudo systemctl restart phone-recorder'"
+echo ""
+echo "To check status:"
+echo "  curl https://recordings.hallocks.xyz/health"

clio-pi/README.md

@@ -0,0 +1,102 @@
+# Clio Pi
+
+Raspberry Pi recording station for the Clio audio system.
+
+## Features
+
+- Continuous audio recording with ffmpeg (opus codec, 2hr segments)
+- Systemd service for auto-start on boot
+- HTML status page showing recording coverage
+- NTP time sync via chrony
+- SSH key-only access (hardened)
+
+## Quick Setup
+
+1. Flash Raspberry Pi OS Lite to SD card using Raspberry Pi Imager
+2. Configure in Imager: hostname, user/pass, WiFi, enable SSH
+3. Boot and SSH into Pi
+4. Copy this directory to the Pi:
+   ```bash
+   rsync -avz /work/projects/clio/clio-pi/ pi@<pi-ip>:~/clio-pi/
+   ```
+5. Run setup:
+   ```bash
+   ssh pi@<pi-ip>
+   cd ~/clio-pi
+   sudo ./setup.sh
+   ```
+6. Add your SSH key before rebooting:
+   ```bash
+   ssh-copy-id pi@<pi-ip>
+   ```
+7. Start recording:
+   ```bash
+   sudo systemctl start record.service
+   ```
+
+## Files
+
+```
+clio-pi/
+├── setup.sh                    # Main setup script (run with sudo)
+├── bin/
+│   ├── record.sh               # Recording loop (ffmpeg)
+│   └── gen_recording_status.py # Status page generator
+├── systemd/
+│   └── record.service          # Systemd service unit
+└── README.md
+```
+
+## Configuration
+
+Edit `~/bin/record.sh` environment variables:
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `AUDIO_DEVICE` | `hw:1` | ALSA device (run `arecord -l` to list) |
+| `SEGMENT_SECONDS` | `7200` | Segment length (2 hours) |
+| `RECORDINGS_DIR` | `~/recordings` | Output directory |
+| `SOURCE_NAME` | `stationary` | Filename prefix |
+
+## Services
+
+| Service | Description |
+|---------|-------------|
+| `record.service` | Recording daemon |
+| `chrony` | NTP time sync |
+| `nginx` | Status page web server |
+
+## Commands
+
+```bash
+# Recording service
+sudo systemctl start record.service
+sudo systemctl stop record.service
+sudo systemctl status record.service
+journalctl -u record.service -f
+
+# Check time sync
+chronyc tracking
+timedatectl
+
+# View status page
+curl http://localhost/
+```
+
+## Syncing Recordings to Server
+
+TODO: Add rsync/sync script to push recordings to server (10.0.0.45)
+
+## Audio Device Setup
+
+List available devices:
+```bash
+arecord -l
+```
+
+Example output:
+```
+card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]
+```
+
+This would be `hw:1,0` or just `hw:1`.

clio-pi/bin/gen_recording_status.py

@@ -0,0 +1,352 @@
+#!/usr/bin/env python3
+import argparse
+import datetime as dt
+import html
+import os
+import re
+import shutil
+import statistics
+from pathlib import Path
+from typing import List, Tuple, Optional
+
+FNAME_RE = re.compile(r"^stationary-(\d{4}-\d{2}-\d{2})_(\d{2}-\d{2}-\d{2})\.opus$")
+
+def parse_start(path: Path, tz) -> Optional[dt.datetime]:
+    m = FNAME_RE.match(path.name)
+    if not m:
+        return None
+    date_str, time_str = m.groups()
+    start = dt.datetime.strptime(f"{date_str} {time_str}", "%Y-%m-%d %H-%M-%S")
+    return start.replace(tzinfo=tz)
+
+def get_duration_seconds(path: Path) -> Optional[float]:
+    try:
+        from mutagen.oggopus import OggOpus  # optional
+        audio = OggOpus(path)
+        return float(getattr(audio.info, "length", 0.0)) or None
+    except Exception:
+        return None
+
+def human_delta(delta: dt.timedelta) -> str:
+    secs = int(abs(delta).total_seconds())
+    d, rem = divmod(secs, 86400)
+    h, rem = divmod(rem, 3600)
+    m, s = divmod(rem, 60)
+    parts = []
+    if d: parts.append(f"{d}d")
+    if h: parts.append(f"{h}h")
+    if m: parts.append(f"{m}m")
+    if not parts: parts.append(f"{s}s")
+    return " ".join(parts)
+
+def merge_intervals(intervals: List[Tuple[dt.datetime, dt.datetime]]) -> List[Tuple[dt.datetime, dt.datetime]]:
+    if not intervals: return []
+    intervals.sort(key=lambda x: x[0])
+    merged = [intervals[0]]
+    for s, e in intervals[1:]:
+        ls, le = merged[-1]
+        if s <= le:
+            merged[-1] = (ls, max(le, e))
+        else:
+            merged.append((s, e))
+    return merged
+
+def day_bounds(d: dt.date, tz):
+    start = dt.datetime(d.year, d.month, d.day, tzinfo=tz)
+    return start, start + dt.timedelta(days=1)
+
+def intersect(a: Tuple[dt.datetime, dt.datetime], b: Tuple[dt.datetime, dt.datetime]) -> Optional[Tuple[dt.datetime, dt.datetime]]:
+    s1, e1 = a; s2, e2 = b
+    s = max(s1, s2); e = min(e1, e2)
+    return (s, e) if s < e else None
+
+def pct(x, total):
+    return 0 if total <= 0 else max(0, min(100, (x/total)*100))
+
+def fmt_ampm(t: dt.datetime) -> str:
+    s = t.strftime("%I:%M%p")  # 01:05PM
+    return s.lstrip("0")
+
+def build(args):
+    tz = dt.datetime.now().astimezone().tzinfo
+    rec_dir = Path(args.dir).expanduser().resolve()
+    files = [p for p in rec_dir.glob("*.opus") if p.is_file()]
+    files.sort()
+
+    # Gather metadata
+    items = []  # (path, start_dt, size_bytes, duration_opt)
+    for p in files:
+        s = parse_start(p, tz)
+        if not s:
+            continue
+        dur = get_duration_seconds(p) if args.read_durations else None
+        try:
+            size = p.stat().st_size
+        except Exception:
+            size = 0
+        items.append((p, s, size, dur))
+    items.sort(key=lambda x: x[1])
+
+    starts = [s for _, s, _, _ in items]
+    deltas = [(b - a).total_seconds() for a, b in zip(starts, starts[1:])]
+
+    # Duration policy (defaults: NO inference, assume 2h)
+    if args.infer:
+        sane = [d for d in deltas if args.infer_min_sec <= d <= args.infer_max_sec]
+        inferred_default = (statistics.median(sane) if sane else args.assume_duration_sec or args.infer_default_sec)
+        inferred_default = max(args.infer_min_sec, min(args.infer_max_sec, inferred_default))
+    else:
+        inferred_default = args.assume_duration_sec or args.infer_default_sec
+
+    # Build intervals
+    intervals: List[Tuple[dt.datetime, dt.datetime]] = []
+    for idx, (p, s, _size, dur) in enumerate(items):
+        if dur is None or dur <= 0:
+            dur_use = float(inferred_default)
+        else:
+            dur_use = dur
+        if idx < len(items)-1 and args.guard_gap_sec > 0:
+            to_next = (items[idx+1][1] - s).total_seconds()
+            dur_use = min(dur_use, max(1.0, to_next - args.guard_gap_sec))
+        e = s + dt.timedelta(seconds=max(1.0, dur_use))
+        intervals.append((s, e))
+
+    gen_time = dt.datetime.now(tz)
+    last_start = starts[-1] if starts else None
+
+    # FS usage for recordings partition
+    try:
+        total_b, used_b, free_b = shutil.disk_usage(str(rec_dir))
+    except Exception:
+        total_b = used_b = free_b = 0
+
+    # Window
+    today = gen_time.date()
+    start_date = today - dt.timedelta(days=args.days - 1)
+
+    big_gap = dt.timedelta(minutes=args.gap_yellow_min)
+    green_gap = dt.timedelta(minutes=args.gap_green_min)
+
+    rows = []
+    window_total_bytes = 0
+    for i in range(args.days):
+        d = start_date + dt.timedelta(days=i)
+        d_start, d_end = day_bounds(d, tz)
+
+        # Per-day file count and bytes (count files that START this day)
+        day_files = [(p, s, size) for (p, s, size, _du) in [(p, s, size, du) for (p, s, size, du) in items] if d_start <= s < d_end]
+        day_bytes = sum(size for (_p, _s, size) in day_files)
+        window_total_bytes += day_bytes
+
+        # Intervals overlapping this day
+        day_intervals = []
+        for (s, e) in intervals:
+            inter = intersect((s, e), (d_start, d_end))
+            if inter:
+                day_intervals.append(inter)
+
+        merged = merge_intervals(day_intervals)
+        covered = sum((e - s).total_seconds() for s, e in merged)
+        day_seconds = 86400.0
+        coverage_pct = pct(covered, day_seconds)
+
+        # Max gap includes edges
+        if not merged:
+            max_gap = dt.timedelta(days=1)
+        else:
+            gaps = [merged[0][0] - d_start]
+            gaps += [b[0] - a[1] for a, b in zip(merged, merged[1:])]
+            gaps.append(d_end - merged[-1][1])
+            max_gap = max(gaps) if gaps else dt.timedelta(0)
+
+        # Status
+        count = len(day_files)
+        if count == 0:
+            status = "red"
+        elif max_gap <= green_gap and coverage_pct >= args.green_cover_pct:
+            status = "green"
+        elif max_gap >= big_gap or coverage_pct < args.yellow_cover_pct:
+            status = "yellow"
+        else:
+            status = "yellow"
+
+        # Mini timeline segments
+        segs = []
+        for s, e in merged:
+            left = pct((s - d_start).total_seconds(), day_seconds)
+            width = pct((e - s).total_seconds(), day_seconds)
+            if width > 0:
+                segs.append((left, width))
+
+        # Details list: show ALL spans; AM/PM times
+        details_txt = ", ".join(f"{fmt_ampm(s)}–{fmt_ampm(e)}" for s, e in merged)
+
+        rows.append({
+            "date": d.isoformat(),
+            "count": count,
+            "bytes": day_bytes,
+            "max_gap": max_gap,
+            "coverage_pct": coverage_pct,
+            "status": status,
+            "segments": segs,
+            "details": details_txt or "—",
+        })
+
+    # HTML
+    def hhmm(td: dt.timedelta) -> str:
+        total = int(td.total_seconds())
+        h = total // 3600
+        m = (total % 3600) // 60
+        return f"{h:02d}:{m:02d}"
+
+    def fmt_bytes(n: int) -> str:
+        units = ("B", "KiB", "MiB", "GiB", "TiB", "PiB")
+        x = float(n)
+        for u in units:
+            if x < 1024.0 or u == units[-1]:
+                return f"{int(x)} {u}" if u == "B" else f"{x:.1f} {u}"
+            x /= 1024.0
+
+
+    title = args.title
+    last_str = "—"
+    if last_start:
+        last_str = f"{last_start.strftime('%Y-%m-%d %I:%M:%S %p %Z')} ({human_delta(gen_time - last_start)} ago)"
+
+    # FS usage strings
+    total_str = fmt_bytes(total_b)
+    used_str  = fmt_bytes(used_b)
+    free_str  = fmt_bytes(free_b)
+    window_bytes_str = fmt_bytes(window_total_bytes)
+
+    html_out = f"""<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta http-equiv="refresh" content="300">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>{html.escape(title)}</title>
+<style>
+  :root {{
+    --green:#30a46c; --yellow:#f5d90a; --red:#e5484d;
+    --bg-green:#e9f7f0; --bg-yellow:#fff8cc; --bg-red:#fdeaea;
+  }}
+  body {{ font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; margin: 1.5rem; }}
+  h1 {{ margin: 0 0 .4rem 0; }}
+  .muted {{ color: #666; font-size: .9rem; }}
+  table {{ border-collapse: collapse; width: 100%; max-width: 1200px; }}
+  th, td {{ padding: .5rem .6rem; border-bottom: 1px solid #eee; text-align: left; vertical-align: middle; }}
+  tr:hover td {{ background: #fafafa; }}
+  .right {{ text-align: right; }}
+  .row-green td {{ background: var(--bg-green); }}
+  .row-yellow td {{ background: var(--bg-yellow); }}
+  .row-red td {{ background: var(--bg-red); }}
+  .status-dot {{ display:inline-block;width:10px;height:10px;border-radius:50%;vertical-align:middle;margin-right:.4rem;}}
+  .green {{ background: var(--green); }}
+  .yellow {{ background: var(--yellow); }}
+  .red {{ background: var(--red); }}
+  .bar {{ position: relative; height: 12px; background: #eee; border-radius: 6px; overflow: hidden; }}
+  .bar .seg {{ position: absolute; top:0; bottom:0; background: var(--green); opacity:.9; }}
+  .cover-label {{ font-size:.85rem; white-space:nowrap; }}
+  .nowrap {{ white-space:nowrap; }}
+  .hdr {{ margin-top:.6rem; margin-bottom:.8rem; }}
+  .kvs span {{ margin-right: 1rem; }}
+</style>
+</head>
+<body>
+  <h1>{html.escape(title)}</h1>
+  <div class="muted">Generated at {gen_time.strftime('%Y-%m-%d %I:%M:%S %p %Z')}</div>
+  <div class="hdr kvs muted">
+    <span><strong>Last recording started:</strong> {html.escape(last_str)}</span>
+    <span><strong>Window:</strong> {args.days} days</span>
+    <span><strong>Dir:</strong> {html.escape(str(rec_dir))}</span>
+  </div>
+  <div class="hdr kvs">
+    <span><strong>Data in window:</strong> {window_bytes_str}</span>
+    <span><strong>Filesystem usage (recordings partition):</strong> used {used_str} • free {free_str} • total {total_str}</span>
+  </div>
+
+  <table>
+    <thead>
+      <tr>
+        <th>Date</th>
+        <th class="right"># Recs</th>
+        <th class="right">Data</th>
+        <th class="right">Max gap</th>
+        <th>Coverage</th>
+        <th>Spans</th>
+        <th>Status</th>
+      </tr>
+    </thead>
+    <tbody>
+"""
+    for r in reversed(rows):
+        cls = f"row-{r['status']}"
+        cov = int(round(r["coverage_pct"]))
+        seg_divs = "".join(
+            f'<div class="seg" style="left:{left:.3f}%;width:{width:.3f}%"></div>'
+            for left, width in r["segments"]
+        )
+        data_str = fmt_bytes(r["bytes"])
+        html_out += f"""      <tr class="{cls}">
+        <td class="nowrap">{r['date']}</td>
+        <td class="right">{r['count']}</td>
+        <td class="right">{data_str}</td>
+        <td class="right">{hhmm(r['max_gap'])}</td>
+        <td>
+          <div class="bar" title="{cov}% covered">{seg_divs}</div>
+          <div class="cover-label">{cov}%</div>
+        </td>
+        <td><div class="muted">{html.escape(r['details'])}</div></td>
+        <td><span class="status-dot {r['status']}"></span>{r['status']}</td>
+      </tr>
+"""
+    html_out += """    </tbody>
+  </table>
+  <p class="muted">Legend: <span class="status-dot green"></span> green = nearly continuous • <span class="status-dot yellow"></span> yellow = gaps or low coverage • <span class="status-dot red"></span> red = no recordings</p>
+</body>
+</html>
+"""
+
+    out_path = Path(args.out).resolve()
+    out_path.parent.mkdir(parents=True, exist_ok=True)
+    tmp = out_path.with_suffix(out_path.suffix + ".tmp")
+    with open(tmp, "w", encoding="utf-8") as f:
+        f.write(html_out)
+    os.replace(tmp, out_path)
+
+def main():
+    p = argparse.ArgumentParser(description="Generate recordings status HTML")
+    p.add_argument("--dir", default=str(Path.home() / "recordings"),
+                   help="Directory containing .opus files (default: ~/recordings)")
+    p.add_argument("--out", default="/var/www/html/index.html",
+                   help="HTML output path (default: /var/www/html/index.html)")
+    # Defaults tuned so cron needs no flags:
+    p.add_argument("--days", type=int, default=365, help="How many days to show (default: 365)")
+    p.add_argument("--gap-yellow-min", type=int, default=120, help="Gap (minutes) that marks a day as yellow (default: 120)")
+    p.add_argument("--gap-green-min", type=int, default=15, help="Max gap (minutes) to still be green (default: 15)")
+    p.add_argument("--read-durations", action="store_true",
+                   help="Use mutagen to read exact file durations (optional; default off).")
+    p.add_argument("--green-cover-pct", type=float, default=90.0,
+                   help="Min coverage%% for green (default: 90)")
+    p.add_argument("--yellow-cover-pct", type=float, default=10.0,
+                   help="Coverage%% below which day is yellow (default: 10)")
+    # Duration policy: default is NO inference, assume 2h
+    p.add_argument("--assume-duration-sec", type=int, default=7200,
+                   help="Assumed duration (s) when real duration is unavailable. Default: 7200 (2h).")
+    p.add_argument("--infer", action="store_true",
+                   help="Enable inferring duration from median start deltas (disabled by default).")
+    p.add_argument("--infer-min-sec", type=int, default=60,
+                   help="Ignore deltas smaller than this when inferring (default: 60s)")
+    p.add_argument("--infer-max-sec", type=int, default=6*3600,
+                   help="Ignore deltas larger than this when inferring (default: 6h)")
+    p.add_argument("--infer-default-sec", type=int, default=20*60,
+                   help="Fallback segment length if nothing else is available (default: 1200s)")
+    p.add_argument("--guard-gap-sec", type=int, default=0,
+                   help="Don’t let a segment extend within this many seconds of next start (default: 0)")
+    p.add_argument("--title", default="Portable Recorder Status", help="Page title")
+    args = p.parse_args()
+    build(args)
+
+if __name__ == "__main__":
+    main()

clio-pi/bin/record.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+set -euo pipefail
+
+# Configuration
+AUDIO_DEVICE="${AUDIO_DEVICE:-hw:1}"      # ALSA device (run 'arecord -l' to list)
+SEGMENT_SECONDS="${SEGMENT_SECONDS:-7200}" # 2 hours per file
+RECORDINGS_DIR="${RECORDINGS_DIR:-$HOME/recordings}"
+SOURCE_NAME="${SOURCE_NAME:-stationary}"   # Prefix for filenames
+
+mkdir -p "${RECORDINGS_DIR}"
+
+echo "Starting recording..."
+echo "  Device: ${AUDIO_DEVICE}"
+echo "  Segment: ${SEGMENT_SECONDS}s"
+echo "  Output: ${RECORDINGS_DIR}/${SOURCE_NAME}-*.opus"
+
+while true; do
+  ffmpeg -f alsa -ac 1 -i "${AUDIO_DEVICE}" \
+    -c:a libopus \
+    -b:a 32k \
+    -f segment \
+    -segment_time "${SEGMENT_SECONDS}" \
+    -strftime 1 \
+    -reset_timestamps 1 \
+    "${RECORDINGS_DIR}/${SOURCE_NAME}-%Y-%m-%d_%H-%M-%S.opus" \
+    2>&1 | while read line; do echo "[ffmpeg] $line"; done
+
+  echo "Recording stopped, restarting in 5s..."
+  sleep 5
+done
+

clio-pi/setup.sh

@@ -0,0 +1,238 @@
+#!/bin/bash
+set -euo pipefail
+
+# Clio Pi Setup Script
+# Run this after a fresh Raspberry Pi OS install
+#
+# Prerequisites:
+# 1. Flash Raspberry Pi OS Lite to SD card
+# 2. Use Raspberry Pi Imager to pre-configure:
+#    - Hostname (e.g., clio-pi)
+#    - Username/password
+#    - WiFi credentials
+#    - Enable SSH
+# 3. Boot Pi and SSH in
+# 4. Copy this repo to /home/pi/clio-pi
+# 5. Run: sudo ./setup.sh
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PI_USER="${PI_USER:-pi}"
+PI_HOME="/home/${PI_USER}"
+
+echo "=== Clio Pi Setup ==="
+echo "User: ${PI_USER}"
+echo "Home: ${PI_HOME}"
+echo ""
+
+# ============================================================
+# 1. System updates
+# ============================================================
+echo ">>> Updating system packages..."
+apt-get update
+apt-get upgrade -y
+
+# ============================================================
+# 2. Install required packages
+# ============================================================
+echo ">>> Installing required packages..."
+apt-get install -y \
+    ffmpeg \
+    python3 \
+    python3-pip \
+    nginx-light \
+    chrony \
+    rsync
+
+# Optional: for reading audio durations
+pip3 install --break-system-packages mutagen || true
+
+# ============================================================
+# 3. Configure NTP/time sync (chrony)
+# ============================================================
+echo ">>> Configuring time sync (chrony)..."
+cat > /etc/chrony/chrony.conf << 'EOF'
+# Use default NTP pools
+pool 2.debian.pool.ntp.org iburst
+
+# Allow the system clock to be stepped in the first 3 updates
+# if its offset is larger than 1 second
+makestep 1.0 3
+
+# Enable kernel synchronization of the real-time clock (RTC)
+rtcsync
+
+# Serve time to the local subnet (optional)
+#allow 10.0.0.0/24
+
+# Log tracking, measurements, statistics
+logdir /var/log/chrony
+EOF
+
+systemctl enable chrony
+systemctl restart chrony
+
+# Set timezone (adjust as needed)
+timedatectl set-timezone America/New_York
+
+echo ">>> Time sync configured. Current time:"
+timedatectl
+
+# ============================================================
+# 4. Configure SSH key-only access
+# ============================================================
+echo ">>> Configuring SSH for key-only access..."
+
+# Ensure .ssh directory exists
+mkdir -p "${PI_HOME}/.ssh"
+chmod 700 "${PI_HOME}/.ssh"
+touch "${PI_HOME}/.ssh/authorized_keys"
+chmod 600 "${PI_HOME}/.ssh/authorized_keys"
+chown -R "${PI_USER}:${PI_USER}" "${PI_HOME}/.ssh"
+
+# Harden sshd_config
+SSHD_CONFIG="/etc/ssh/sshd_config"
+
+# Backup original
+cp "${SSHD_CONFIG}" "${SSHD_CONFIG}.bak"
+
+# Disable password authentication
+sed -i 's/^#*PasswordAuthentication.*/PasswordAuthentication no/' "${SSHD_CONFIG}"
+sed -i 's/^#*ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/' "${SSHD_CONFIG}"
+sed -i 's/^#*UsePAM.*/UsePAM no/' "${SSHD_CONFIG}"
+sed -i 's/^#*PermitRootLogin.*/PermitRootLogin no/' "${SSHD_CONFIG}"
+
+# Ensure pubkey auth is enabled
+grep -q "^PubkeyAuthentication" "${SSHD_CONFIG}" || echo "PubkeyAuthentication yes" >> "${SSHD_CONFIG}"
+
+echo ""
+echo "!!! IMPORTANT !!!"
+echo "Before rebooting, add your SSH public key to:"
+echo "  ${PI_HOME}/.ssh/authorized_keys"
+echo ""
+echo "From your local machine, run:"
+echo "  ssh-copy-id ${PI_USER}@<pi-ip-address>"
+echo ""
+echo "Or manually append your ~/.ssh/id_ed25519.pub (or id_rsa.pub)"
+echo ""
+
+# Don't restart SSH yet - user needs to add their key first
+
+# ============================================================
+# 5. Set up recording directories
+# ============================================================
+echo ">>> Setting up recording directories..."
+mkdir -p "${PI_HOME}/recordings"
+mkdir -p "${PI_HOME}/bin"
+chown -R "${PI_USER}:${PI_USER}" "${PI_HOME}/recordings"
+chown -R "${PI_USER}:${PI_USER}" "${PI_HOME}/bin"
+
+# ============================================================
+# 6. Install recording scripts
+# ============================================================
+echo ">>> Installing recording scripts..."
+cp "${SCRIPT_DIR}/bin/record.sh" "${PI_HOME}/bin/"
+cp "${SCRIPT_DIR}/bin/gen_recording_status.py" "${PI_HOME}/bin/"
+chmod +x "${PI_HOME}/bin/record.sh"
+chmod +x "${PI_HOME}/bin/gen_recording_status.py"
+chown -R "${PI_USER}:${PI_USER}" "${PI_HOME}/bin"
+
+# ============================================================
+# 7. Install systemd service
+# ============================================================
+echo ">>> Installing systemd service..."
+cp "${SCRIPT_DIR}/systemd/record.service" /etc/systemd/system/
+sed -i "s|/home/pi|${PI_HOME}|g" /etc/systemd/system/record.service
+sed -i "s|User=pi|User=${PI_USER}|g" /etc/systemd/system/record.service
+
+systemctl daemon-reload
+systemctl enable record.service
+# Don't start yet - user may need to configure audio device
+
+# ============================================================
+# 8. Set up cron for status page
+# ============================================================
+echo ">>> Setting up cron job for status page..."
+CRON_LINE="*/10 * * * * python3 ${PI_HOME}/bin/gen_recording_status.py --dir ${PI_HOME}/recordings"
+
+# Install cron job for pi user
+(crontab -u "${PI_USER}" -l 2>/dev/null | grep -v gen_recording_status; echo "${CRON_LINE}") | crontab -u "${PI_USER}" -
+
+# ============================================================
+# 9. Configure nginx for status page
+# ============================================================
+echo ">>> Configuring nginx for status page..."
+cat > /etc/nginx/sites-available/default << 'EOF'
+server {
+    listen 80 default_server;
+    listen [::]:80 default_server;
+
+    root /var/www/html;
+    index index.html;
+
+    server_name _;
+
+    location / {
+        try_files $uri $uri/ =404;
+    }
+}
+EOF
+
+# Ensure www-data can read the status file
+mkdir -p /var/www/html
+chown -R www-data:www-data /var/www/html
+
+# Allow pi user to write to /var/www/html
+usermod -a -G www-data "${PI_USER}" || true
+chmod 775 /var/www/html
+
+systemctl enable nginx
+systemctl restart nginx
+
+# Generate initial status page
+sudo -u "${PI_USER}" python3 "${PI_HOME}/bin/gen_recording_status.py" --dir "${PI_HOME}/recordings" || true
+
+# ============================================================
+# 10. Print audio device info
+# ============================================================
+echo ""
+echo "=== Audio Devices ==="
+arecord -l || echo "(no audio devices found yet)"
+echo ""
+echo "The recording script uses hw:1 by default."
+echo "Edit ${PI_HOME}/bin/record.sh if your device is different."
+
+# ============================================================
+# Summary
+# ============================================================
+echo ""
+echo "============================================================"
+echo "=== Setup Complete ==="
+echo "============================================================"
+echo ""
+echo "Next steps:"
+echo ""
+echo "1. Add your SSH public key:"
+echo "   From your computer: ssh-copy-id ${PI_USER}@$(hostname -I | awk '{print $1}')"
+echo ""
+echo "2. Test SSH key login works, then restart SSH:"
+echo "   sudo systemctl restart sshd"
+echo ""
+echo "3. Check/configure audio device:"
+echo "   arecord -l"
+echo "   Edit ~/bin/record.sh if needed (currently uses hw:1)"
+echo ""
+echo "4. Start recording service:"
+echo "   sudo systemctl start record.service"
+echo "   sudo systemctl status record.service"
+echo ""
+echo "5. View status page:"
+echo "   http://$(hostname -I | awk '{print $1}')/"
+echo ""
+echo "Services installed:"
+echo "  - chrony (NTP time sync) - RUNNING"
+echo "  - nginx (status page) - RUNNING"
+echo "  - record.service - ENABLED (not started)"
+echo ""
+echo "Cron job installed:"
+echo "  - gen_recording_status.py runs every 10 minutes"
+echo ""

clio-pi/systemd/record.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Record
+
+[Service]
+ExecStart=/home/pi/bin/record.sh
+User=pi
+Type=simple
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target