chore: remove skeleton build mode and stub #ifdef scaffolding

Drop the M0 no-deps skeleton preset and all VOICECAT_HAS_NET/AUDIO/OPUS/NS
guards that it required. Every subsystem is fully implemented; the stub
#else paths were dead code that added noise to every header and source file.

- CMakePresets.json: remove skeleton configure/build/test entries
- CMakeLists.txt (root/core/tests): remove VOICECAT_USE_VCPKG_DEPS option
  and guards; all targets now build unconditionally
- 17 C++ source files: unwrap HAS_* guards, delete stub #else blocks
- apm_processor.cpp: delete ApmPassthrough no-op class; create() always
  returns RnnoiseProcessor
- 18 test files: remove HAS_* guards and stub int main() skip bodies
- docs/building.md: remove skeleton from preset table and prose

VOICECAT_HAS_LOOPBACK (Windows WASAPI loopback platform gate) unchanged.
29/29 ctest green.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

core/CMakeLists.txt

@@ -42,8 +42,7 @@ set_target_properties(voicecat PROPERTIES
     CXX_VISIBILITY_PRESET hidden
     VISIBILITY_INLINES_HIDDEN ON)
 
-if(VOICECAT_USE_VCPKG_DEPS)
-    find_package(protobuf CONFIG REQUIRED)
+find_package(protobuf CONFIG REQUIRED)
     find_package(unofficial-sodium CONFIG REQUIRED)
     find_package(MbedTLS CONFIG REQUIRED)
     find_package(asio CONFIG REQUIRED)
@@ -129,4 +128,3 @@ if(VOICECAT_USE_VCPKG_DEPS)
 
     # Signal to C++ code that the real networking/crypto stack is available.
     target_compile_definitions(voicecat PUBLIC VOICECAT_HAS_NET)
-endif()

core/include/voicecat.h

@@ -8,13 +8,9 @@
  * Design: docs/architecture.md §4. Everything here is async + event-driven — calls return
  * immediately and results/state changes arrive via the vc_callbacks.on_event callback.
  *
- * STATUS: real, behind VOICECAT_HAS_NET (the `dev`/`release`/`server-release` presets —
- * vcpkg deps on; see docs/building.md). As of M3, control plane, voice, multi-stream, device
- * enumeration, VAD/PTT, and stereo playback all work for real via core/src/core/client.cpp.
- * The no-deps `skeleton` preset still links a stub vc_client that returns VC_ERR_NOT_IMPLEMENTED
- * for everything below `connect`, purely to keep that skeleton build green. webrtc AEC/NS/AGC
- * remains an inert passthrough regardless of preset (no Windows/MSVC port upstream —
- * docs/voice.md §8/§11, PROGRESS.md).
+ * STATUS: real. Control plane, voice, multi-stream, device enumeration, VAD/PTT, and stereo
+ * playback all work via core/src/core/client.cpp. webrtc AEC/NS/AGC remains an inert passthrough
+ * (no Windows/MSVC port upstream — docs/voice.md §8/§11, PROGRESS.md).
  */
 #ifndef VOICECAT_H
 #define VOICECAT_H
@@ -56,7 +52,7 @@ extern "C" {
 /* ── Result codes ─────────────────────────────────────────────────────────── */
 typedef enum vc_result {
     VC_OK = 0,
-    VC_ERR_NOT_IMPLEMENTED = 1, /* skeleton stub */
+    VC_ERR_NOT_IMPLEMENTED = 1,
     VC_ERR_INVALID_ARG = 2,
     VC_ERR_NOT_CONNECTED = 3,
     VC_ERR_ALREADY = 4,

core/src/audio/apm_processor.cpp

@@ -5,9 +5,7 @@
 #include <chrono>
 #include <cmath>
 
-#ifdef VOICECAT_HAS_NS
 #include "rnnoise.h"
-#endif
 
 namespace voicecat::audio {
 
@@ -19,15 +17,6 @@ int64_t steady_now_ms() {
 }
 }  // namespace
 
-// ── ApmPassthrough ────────────────────────────────────────────────────────────
-// No-op: returns true (VAD always open), does not modify PCM.
-// Replaced by WebrtcApmProcessor when VOICECAT_HAS_APM is defined.
-class ApmPassthrough final : public ApmProcessor {
-   public:
-    void process_render(const int16_t*, int, int) override {}
-    bool process_capture(int16_t*, int, int) override { return true; }
-};
-
 // ── EnergyVadProcessor ──────────────────────────────────────────────────────
 // Lightweight, dependency-free energy/RMS VAD — see apm_processor.h's create_vad() doc comment
 // for why this exists instead of a real APM. No AEC (process_render is a no-op); doesn't modify
@@ -62,7 +51,6 @@ class EnergyVadProcessor final : public ApmProcessor {
     int64_t last_voice_ms_ = 0;  // epoch start -> gate begins closed until first loud frame
 };
 
-#ifdef VOICECAT_HAS_NS
 // ── RnnoiseProcessor ─────────────────────────────────────────────────────────
 // Real noise suppression via vendored RNNoise (third_party/rnnoise; docs/voice.md §10-11).
 // RNNoise is a mono, 48 kHz, fixed 480-sample (10 ms) speech denoiser; our engine clock is fixed
@@ -103,14 +91,9 @@ class RnnoiseProcessor final : public ApmProcessor {
     float in_[kFrame];
     float out_[kFrame];
 };
-#endif  // VOICECAT_HAS_NS
 
 std::unique_ptr<ApmProcessor> ApmProcessor::create() {
-#ifdef VOICECAT_HAS_NS
     return std::make_unique<RnnoiseProcessor>();
-#else
-    return std::make_unique<ApmPassthrough>();
-#endif
 }
 
 std::unique_ptr<ApmProcessor> ApmProcessor::create_vad(float rms_threshold,

core/src/audio/audio_engine.cpp

@@ -1,7 +1,5 @@
-#ifdef VOICECAT_HAS_AUDIO
 #define MINIAUDIO_IMPLEMENTATION
 #include <miniaudio.h>
-#endif
 
 #include "audio/audio_engine.h"
 
@@ -41,7 +39,6 @@ constexpr int32_t kStarveSamples    = 48000 * 120 / 1000;  // reseed when clock
 // defense-in-depth against any future regression that skips remove_stream.
 constexpr int32_t kPlcCapSamples = 48000 * 2;  // 2 s @ 48 kHz
 
-#ifdef VOICECAT_HAS_AUDIO
 // device_id encoding (DeviceInfo::id / AudioParams::*_device_id): a hex string of the raw
 // ma_device_id bytes. Opaque on purpose — names aren't guaranteed unique, and this is the only
 // stable handle miniaudio accepts back for device selection. Internal contract only; never
@@ -76,7 +73,6 @@ bool hex_decode_device_id(const std::string& hex, ma_device_id* out) {
     }
     return true;
 }
-#endif  // VOICECAT_HAS_AUDIO
 }  // namespace
 
 // ── JitterBuffer ─────────────────────────────────────────────────────────────
@@ -197,19 +193,14 @@ AudioEngine::AudioEngine() = default;
 
 AudioEngine::~AudioEngine() {
     stop();
-#ifdef VOICECAT_HAS_AUDIO
     stop_loopback_capture();  // loopback has an independent lifecycle — close it before the context
     if (context_inited_) {
         ma_context_uninit(&context_);
         context_inited_ = false;
     }
-#endif
-#ifdef VOICECAT_HAS_OPUS
     if (dred_dec_) { opus_dred_decoder_destroy(dred_dec_); dred_dec_ = nullptr; }
-#endif
 }
 
-#ifdef VOICECAT_HAS_AUDIO
 ma_context_config AudioEngine::make_context_config() {
     ma_context_config cfg = ma_context_config_init();
     // iOS: leave AVAudioSession entirely to the Swift layer (IOSAudioRouter). See the
@@ -219,7 +210,6 @@ ma_context_config AudioEngine::make_context_config() {
     cfg.coreaudio.noAudioSessionDeactivate = MA_TRUE;  // don't setActive(false) on device uninit
     return cfg;
 }
-#endif
 
 bool AudioEngine::start(const AudioParams& p, CaptureCallback capture_cb) {
     if (running_.load()) return false;
@@ -227,14 +217,11 @@ bool AudioEngine::start(const AudioParams& p, CaptureCallback capture_cb) {
     capture_cb_    = std::move(capture_cb);
     frame_samples_ = static_cast<int>(p.sample_rate / 1000 * p.frame_ms);
     running_.store(true, std::memory_order_release);
-#ifdef VOICECAT_HAS_OPUS
     if (!dred_dec_) {
         int err = 0;
         dred_dec_ = opus_dred_decoder_create(&err);  // null on failure — DRED silently disabled
     }
-#endif
 
-#ifdef VOICECAT_HAS_AUDIO
     // Pre-allocate capture accumulators before the devices start so on_capture / on_loopback
     // never allocate on the RT thread. count=0 means "empty"; the buf is sized to exactly one
     // encoder frame so a memcpy into it can never overrun. The mic accumulator is sized to
@@ -247,9 +234,7 @@ bool AudioEngine::start(const AudioParams& p, CaptureCallback capture_cb) {
     capture_accum_.count = 0;
     loopback_accum_.buf.assign(static_cast<size_t>(frame_samples_), 0);
     loopback_accum_.count = 0;
-#endif
 
-#ifdef VOICECAT_HAS_AUDIO
     // Own the ma_context (lazily, reused across restarts) so miniaudio does not touch
     // AVAudioSession on iOS — the Swift IOSAudioRouter is the sole session owner. Without
     // this, ma_device_init(nullptr, ...) below would reset the session category to Record/
@@ -342,14 +327,12 @@ bool AudioEngine::start(const AudioParams& p, CaptureCallback capture_cb) {
         mixer_timer_stop_.store(false, std::memory_order_release);
         mixer_timer_thread_ = std::thread([this] { run_mixer_timer(); });
     }
-#endif  // VOICECAT_HAS_AUDIO
 
     return true;
 }
 
 std::vector<DeviceInfo> AudioEngine::enumerate_devices(bool capture) {
     std::vector<DeviceInfo> result;
-#ifdef VOICECAT_HAS_AUDIO
     // Use the no-AVAudioSession-management config here too: device enumeration runs at
     // SessionState init (refreshDevices) and on settings views, and a default-config context
     // would call setCategory()/setActive() on iOS, disrupting the session the Swift layer owns.
@@ -377,16 +360,12 @@ std::vector<DeviceInfo> AudioEngine::enumerate_devices(bool capture) {
     }
 
     ma_context_uninit(&ctx);
-#else
-    (void)capture;
-#endif  // VOICECAT_HAS_AUDIO
     return result;
 }
 
 void AudioEngine::stop() {
     if (!running_.exchange(false)) return;
 
-#ifdef VOICECAT_HAS_AUDIO
     // External playback: stop + join the mixer-timer thread before tearing down state it reads.
     mixer_timer_stop_.store(true, std::memory_order_release);
     if (mixer_timer_thread_.joinable()) mixer_timer_thread_.join();
@@ -400,11 +379,9 @@ void AudioEngine::stop() {
         ma_device_uninit(&playback_device_);
         playback_started_ = false;
     }
-#endif
 }
 
 bool AudioEngine::suspend() {
-#ifdef VOICECAT_HAS_AUDIO
     if (!running_.load(std::memory_order_acquire)) return true;
     // External playback: pause the mixer timer (there is no playback device to stop). This
     // matches the VPIO renderer going down during an AVAudioSession interruption.
@@ -416,13 +393,9 @@ bool AudioEngine::suspend() {
     if (capture_started_)  ok &= (ma_device_stop(&capture_device_)  == MA_SUCCESS);
     if (playback_started_) ok &= (ma_device_stop(&playback_device_) == MA_SUCCESS);
     return ok;
-#else
-    return true;
-#endif
 }
 
 bool AudioEngine::resume() {
-#ifdef VOICECAT_HAS_AUDIO
     if (!running_.load(std::memory_order_acquire)) return true;
     // External playback: relaunch the mixer timer (mixer_scratch_ is still sized from start()).
     if (external_playback_ && !mixer_timer_thread_.joinable()) {
@@ -433,9 +406,6 @@ bool AudioEngine::resume() {
     if (capture_started_)  ok &= (ma_device_start(&capture_device_)  == MA_SUCCESS);
     if (playback_started_) ok &= (ma_device_start(&playback_device_) == MA_SUCCESS);
     return ok;
-#else
-    return true;
-#endif
 }
 
 void AudioEngine::inject_capture(int kind, const int16_t* pcm, size_t samples_per_channel,
@@ -530,12 +500,10 @@ void AudioEngine::remove_stream(uint32_t ssrc) {
     std::lock_guard lk(streams_mu_);
     auto it = streams_.find(ssrc);
     if (it != streams_.end()) {
-#ifdef VOICECAT_HAS_OPUS
         if (it->second.dred_state_) {
             opus_dred_free(it->second.dred_state_);
             it->second.dred_state_ = nullptr;
         }
-#endif
         streams_.erase(it);
     }
 }
@@ -590,7 +558,6 @@ int32_t AudioEngine::stream_playout_depth_samples(uint32_t ssrc) const {
     return static_cast<int32_t>(*newest - it->second.playout_ts);
 }
 
-#ifdef VOICECAT_HAS_OPUS
 void AudioEngine::init_recv_stream(uint32_t ssrc, const codec::OpusParams& p,
                                    uint32_t user_id, uint32_t stream_id, bool is_voice) {
     std::lock_guard lk(streams_mu_);
@@ -616,7 +583,6 @@ void AudioEngine::init_recv_stream(uint32_t ssrc, const codec::OpusParams& p,
         stream.dred_state_ = opus_dred_alloc(&err);  // null on failure — falls back to PLC
     }
 }
-#endif
 
 void AudioEngine::set_pcm_sink(PcmSink cb, void* user) {
     pcm_sink_user_.store(user, std::memory_order_relaxed);
@@ -628,8 +594,6 @@ void AudioEngine::set_mixed_output_sink(MixedSink cb, void* user) {
     mixed_sink_.store(cb, std::memory_order_release);
 }
 
-#ifdef VOICECAT_HAS_AUDIO
-
 void AudioEngine::capture_data_cb(ma_device* dev, void* /*out*/,
                                    const void* in, ma_uint32 frame_count) {
     auto* self = static_cast<AudioEngine*>(dev->pUserData);
@@ -678,7 +642,6 @@ void AudioEngine::on_playback(int16_t* out, ma_uint32 frames) {
     std::unique_lock lk(streams_mu_, std::try_to_lock);
     if (!lk) return;  // contended: emit silence this period
 
-#ifdef VOICECAT_HAS_OPUS
     std::vector<int32_t> mix(frames * pb_channels, 0);
 
     for (auto& [ssrc, stream] : streams_) {
@@ -747,7 +710,6 @@ void AudioEngine::on_playback(int16_t* out, ma_uint32 frames) {
                 // embeds in the next packet) → PLC comfort noise. DRED and FEC both need the
                 // *next* packet already buffered, so copy it once and try each in turn.
                 n = -1;
-#ifdef VOICECAT_HAS_OPUS
                 uint32_t next_ts = stream.playout_ts + static_cast<uint32_t>(frame_samples);
                 size_t psz = stream.jitter.try_copy_front_payload(
                     next_ts, stream.dred_payload_scratch_.data(),
@@ -777,7 +739,6 @@ void AudioEngine::on_playback(int16_t* out, ma_uint32 frames) {
                         stream.dred_payload_scratch_.data(), static_cast<int>(psz),
                         stream.decode_scratch.data(), frame_samples, /*fec=*/true);
                 }
-#endif
                 // 3. PLC: synthesize a continuation when no redundancy is available.
                 if (n <= 0) {
                     n = stream.decoder.decode(nullptr, 0, stream.decode_scratch.data(),
@@ -858,10 +819,6 @@ void AudioEngine::on_playback(int16_t* out, ma_uint32 frames) {
         int32_t s = static_cast<int32_t>(static_cast<float>(mix[i]) * ovol);
         out[i] = static_cast<int16_t>(std::clamp(s, -32768, 32767));
     }
-#else
-    (void)out;
-    (void)frames;
-#endif
 }
 
 // External-playback timer (iOS VPIO): with no hardware playback device to "pull" frames, this
@@ -986,11 +943,4 @@ bool AudioEngine::start_loopback_capture(int /*kind*/, int /*channels*/) { retur
 void AudioEngine::stop_loopback_capture() {}
 #endif  // VOICECAT_HAS_LOOPBACK
 
-#endif  // VOICECAT_HAS_AUDIO
-
-#ifndef VOICECAT_HAS_AUDIO
-bool AudioEngine::start_loopback_capture(int /*kind*/, int /*channels*/) { return false; }
-void AudioEngine::stop_loopback_capture() {}
-#endif
-
 }  // namespace voicecat::audio

core/src/audio/audio_engine.h

@@ -25,14 +25,10 @@
 #include <unordered_map>
 #include <vector>
 
-#ifdef VOICECAT_HAS_AUDIO
 // miniaudio single-header — MINIAUDIO_IMPLEMENTATION defined in audio_engine.cpp
 #include <miniaudio.h>
-#endif
 
-#ifdef VOICECAT_HAS_OPUS
 #include "codec/opus_codec.h"
-#endif
 
 #include "audio/apm_processor.h"
 
@@ -222,7 +218,6 @@ class AudioEngine {
     // bounded-depth invariant. Returns 0 if the stream is unknown or not yet playing out.
     int32_t  stream_playout_depth_samples(uint32_t ssrc) const;
 
-#ifdef VOICECAT_HAS_OPUS
     // Configure the Opus decoder for an incoming ssrc (must be called before
     // push_recv_frame for that ssrc). user_id/stream_id identify the source for the
     // pcm_sink_ callback. is_voice marks a MIC stream so the receive-side NR pass knows it may
@@ -230,7 +225,6 @@ class AudioEngine {
     // Thread-safe.
     void init_recv_stream(uint32_t ssrc, const codec::OpusParams& p,
                           uint32_t user_id, uint32_t stream_id, bool is_voice);
-#endif
 
     // External PCM tap: callback fired once per decoded Opus frame per remote stream, on the
     // playback (RT) thread. Matching signature to vc_pcm_sink_cb (cast at the C-ABI boundary).
@@ -254,7 +248,6 @@ class AudioEngine {
     // is samples per channel; total samples written = samples_per_channel * channels.
     void inject_capture(int kind, const int16_t* pcm, size_t samples_per_channel, int channels);
 
-#ifdef VOICECAT_HAS_AUDIO
     // TEST-ONLY — exposes the playback mixer without a real ma_device, so tests can verify
     // stereo mixing end-to-end (no audio hardware needed). Same logic the real playback
     // callback uses; safe to call any time after start() (no ma_device touched).
@@ -312,7 +305,6 @@ class AudioEngine {
             }
         }
     }
-#endif
 
 #ifdef VOICECAT_HAS_LOOPBACK
     // TEST-ONLY — drives the loopback accumulator directly with an explicit callback, the
@@ -354,7 +346,6 @@ class AudioEngine {
 #endif
 
    private:
-#ifdef VOICECAT_HAS_AUDIO
     static void capture_data_cb(ma_device*, void*, const void*, ma_uint32);
     static void playback_data_cb(ma_device*, void*, const void*, ma_uint32);
     void on_capture(const int16_t* pcm, ma_uint32 frames);
@@ -403,7 +394,6 @@ class AudioEngine {
     bool      loopback_started_ = false;
     int       loopback_kind_    = 0;
     int       loopback_channels_ = 1;  // channel count the loopback device was opened with
-#endif
 #endif
 
     AudioParams      params_{};
@@ -441,9 +431,7 @@ class AudioEngine {
     // Per remote stream (protected by streams_mu_).
     struct RemoteStream {
         JitterBuffer     jitter;
-#ifdef VOICECAT_HAS_OPUS
         codec::OpusDecoder decoder;
-#endif
         float            gain  = 1.0f;
         bool             mute  = false;
         uint32_t         playout_ts = 0;
@@ -484,9 +472,7 @@ class AudioEngine {
 
         // DRED: pre-allocated scratch for loss recovery. dred_state_ is per-stream; see
         // AudioEngine::dred_dec_ (shared). Allocated in init_recv_stream(); freed in remove_stream().
-#ifdef VOICECAT_HAS_OPUS
         ::OpusDRED*          dred_state_ = nullptr;
-#endif
         std::vector<uint8_t> dred_payload_scratch_;  // pre-sized to 4000 bytes
 
         // In-band FEC: whether the sender negotiated OPUS_SET_INBAND_FEC for this stream.
@@ -574,9 +560,7 @@ class AudioEngine {
     std::atomic<void*>     mixed_sink_user_{nullptr};
     bool                   external_playback_ = false;
 
-#ifdef VOICECAT_HAS_OPUS
     ::OpusDREDDecoder* dred_dec_ = nullptr;  // shared DRED decoder; null if unsupported
-#endif
 
     static constexpr int64_t kTalkHangoverMs = 300;
 };

core/src/codec/opus_codec.cpp

@@ -2,8 +2,6 @@
 
 namespace voicecat::codec {
 
-#ifdef VOICECAT_HAS_OPUS
-
 // Map an intended channel/capture sample rate (Hz) to the Opus max-bandwidth constant. The
 // codec always runs at 48 kHz internally (docs/voice.md §3); this caps the bandwidth the
 // encoder will select so a channel can request narrowband/wideband audio for low-bitrate rooms.
@@ -103,16 +101,4 @@ void OpusDecoder::destroy() {
     if (dec_) { opus_decoder_destroy(dec_); dec_ = nullptr; }
 }
 
-#else  // !VOICECAT_HAS_OPUS — stubs
-
-bool OpusEncoder::init(const OpusParams&)            { err_ = "OPUS not compiled in"; return false; }
-int  OpusEncoder::encode(const int16_t*, int, uint8_t*, int) { return -1; }
-void OpusEncoder::destroy()                          {}
-
-bool OpusDecoder::init(const OpusParams&)            { err_ = "OPUS not compiled in"; return false; }
-int  OpusDecoder::decode(const uint8_t*, int, int16_t*, int, bool) { return -1; }
-void OpusDecoder::destroy()                          {}
-
-#endif  // VOICECAT_HAS_OPUS
-
 }  // namespace voicecat::codec

core/src/codec/opus_codec.h

@@ -10,9 +10,7 @@
 #include <cstdint>
 #include <vector>
 
-#ifdef VOICECAT_HAS_OPUS
 #include <opus/opus.h>
-#endif
 
 namespace voicecat::codec {
 
@@ -73,11 +71,7 @@ class OpusEncoder {
     const char* error_string() const { return err_; }
 
    private:
-#ifdef VOICECAT_HAS_OPUS
     ::OpusEncoder* enc_ = nullptr;
-#else
-    void* enc_ = nullptr;
-#endif
     int         frame_samples_ = 0;
     int         channels_      = 1;
     const char* err_           = nullptr;
@@ -104,10 +98,8 @@ class OpusDecoder {
     // Decode a lost frame using pre-parsed DRED state from the next received packet.
     // dred_offset=0 means the frame immediately before the next packet.
     // Returns frame_samples on success, -1 if DRED unavailable or decode failed.
-#ifdef VOICECAT_HAS_OPUS
     int decode_dred(::OpusDRED* dred, int32_t dred_offset, int16_t* out_pcm, int max_samples);
     ::OpusDecoder* raw() const { return dec_; }
-#endif
 
     void destroy();
 
@@ -117,11 +109,7 @@ class OpusDecoder {
     const char* error_string() const { return err_; }
 
    private:
-#ifdef VOICECAT_HAS_OPUS
     ::OpusDecoder* dec_ = nullptr;
-#else
-    void* dec_ = nullptr;
-#endif
     int         frame_samples_ = 0;
     int         channels_      = 1;
     const char* err_           = nullptr;

core/src/core/client.cpp

@@ -1,7 +1,5 @@
 #include "core/client.h"
 
-#ifdef VOICECAT_HAS_NET
-
 #ifdef _WIN32
 #  ifndef WIN32_LEAN_AND_MEAN
 #    define WIN32_LEAN_AND_MEAN
@@ -1867,7 +1865,6 @@ vc_result vc_client::test_inject_capture(uint32_t stream_id, const int16_t* pcm,
 }
 
 vc_result vc_client::list_devices(vc_device_kind kind, vc_device_list* out) {
-#ifdef VOICECAT_HAS_AUDIO
     // Works in any connection state — device pickers need to populate pre-connect.
     auto devices = voicecat::audio::AudioEngine::enumerate_devices(kind == VC_DEVICE_INPUT);
 
@@ -1885,12 +1882,6 @@ vc_result vc_client::list_devices(vc_device_kind kind, vc_device_list* out) {
     out->items = items;
     out->count = devices.size();
     return VC_OK;
-#else
-    (void)kind;
-    out->items = nullptr;
-    out->count = 0;
-    return VC_ERR_NOT_IMPLEMENTED;
-#endif
 }
 
 // ── M4: channel/user/stream snapshot getters ─────────────────────────────────
@@ -2209,102 +2200,3 @@ void vc_client::run_talk_timer() {
         std::this_thread::sleep_for(std::chrono::milliseconds(kTalkPollMs));
     }
 }
-
-#else  // !VOICECAT_HAS_NET
-
-// ── M0 stub implementations ───────────────────────────────────────────────────
-
-vc_client::vc_client(const vc_config& cfg, vc_callbacks cb) : cfg_(cfg), cb_(cb) {}
-vc_client::~vc_client() = default;
-
-void vc_client::emit(const vc_event& ev) const {
-    if (cb_.on_event) cb_.on_event(cb_.user, &ev);
-}
-
-vc_result vc_client::connect(const char*, uint16_t)        { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::disconnect()                           { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::authenticate_guest(const char*)        { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::authenticate_user(const char*, const char*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::join_channel(uint32_t, const char*)   { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::leave_channel()                        { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::join_voice()                           { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::leave_voice()                          { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::stream_start(const vc_stream_desc&, uint32_t*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::stream_stop(uint32_t)                 { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_input_device(uint32_t, const char*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_capture_channels(uint32_t, uint32_t) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_input_mode(vc_input_mode)         { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_vad_threshold(float)              { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_input_gain(float)                 { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_input_noise_reduction(bool)      { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_push_to_talk(bool)                { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_self_mute(bool, bool)             { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_remote_stream(uint32_t, uint32_t, float, bool, bool) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::get_remote_stream(uint32_t, uint32_t, vc_remote_stream_state*) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::send_text(vc_text_scope, uint32_t, const char*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::list_devices(vc_device_kind, vc_device_list* out) {
-    out->items = nullptr;
-    out->count = 0;
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::get_stream_audio_config(uint32_t, uint32_t, vc_audio_config*) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::stream_feed_pcm(uint32_t, const int16_t*, size_t, uint32_t) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::set_pcm_sink(vc_pcm_sink_cb, void*) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::set_mixed_output_sink(vc_mixed_output_cb, void*) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::set_external_playback(bool) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::test_inject_capture(uint32_t, const int16_t*, size_t) {
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::list_channels(vc_channel_list* out) {
-    out->items = nullptr;
-    out->count = 0;
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::list_users(vc_user_list* out) {
-    out->items = nullptr;
-    out->count = 0;
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::list_user_streams(uint32_t, vc_stream_summary_list* out) {
-    out->items = nullptr;
-    out->count = 0;
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::confirm_server_identity(bool) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::get_server_identity_display(char*, size_t, size_t* out_len) {
-    if (out_len) *out_len = 0;
-    return VC_ERR_NOT_IMPLEMENTED;
-}
-vc_result vc_client::kick_user(uint32_t, const char*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::ban_user(uint32_t, const char*, uint64_t) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_permission(uint32_t, const vc_permissions*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::set_server_mute(uint32_t, bool, bool) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::move_user(uint32_t, uint32_t) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::create_channel(const vc_channel_info*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::edit_channel(const vc_channel_info*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::delete_channel(uint32_t) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::create_account(const char*, const char*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::reset_password(const char*, const char*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::delete_account(const char*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::list_accounts() { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::get_account_list(vc_account_list*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::get_permissions(vc_permissions*) { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::audio_suspend() { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::audio_resume()  { return VC_ERR_NOT_IMPLEMENTED; }
-vc_result vc_client::audio_restart() { return VC_ERR_NOT_IMPLEMENTED; }
-
-#endif  // VOICECAT_HAS_NET

core/src/core/client.h

@@ -6,8 +6,6 @@
 
 #include "voicecat.h"
 
-#ifdef VOICECAT_HAS_NET
-
 #include <atomic>
 #include <condition_variable>
 #include <deque>
@@ -29,8 +27,6 @@
 #include "session/session.h"
 #include "proto/voicecat.pb.h"
 
-#endif  // VOICECAT_HAS_NET
-
 struct vc_client {
     vc_client(const vc_config& cfg, vc_callbacks cb);
     ~vc_client();
@@ -118,11 +114,7 @@ struct vc_client {
     vc_result get_permissions(vc_permissions* out);
 
     vc_connection_state state() const {
-#ifdef VOICECAT_HAS_NET
         return state_net_.load(std::memory_order_acquire);
-#else
-        return state_;
-#endif
     }
 
    private:
@@ -131,7 +123,6 @@ struct vc_client {
     vc_config    cfg_{};
     vc_callbacks cb_{};
 
-#ifdef VOICECAT_HAS_NET
     // ── M1: TCP/TLS control channel ─────────────────────────────────────────────
     std::atomic<vc_connection_state> state_net_{VC_STATE_DISCONNECTED};
 
@@ -339,12 +330,8 @@ struct vc_client {
     // capture callback never allocates or races this pointer.
     std::unique_ptr<voicecat::audio::ApmProcessor> mic_ns_;
 
-    // teardown_voice() is called both from run_io()'s own cleanup (on the io_thread_, when
-    // the read loop exits) and from disconnect() (on the caller's thread) -- without
-    // serializing those two call sites, both can see udp_thread_/talk_timer_thread_ as
-    // joinable() at the same time and race to join() the same std::thread object (UB; an
-    // intermittent "No such process" std::system_error on Windows is the typical symptom).
-    // This mutex makes teardown_voice() idempotent under concurrent calls.
+    // teardown_voice() is called from run_io() and disconnect() concurrently; this mutex
+    // makes it idempotent (avoids a double-join race on udp_thread_/talk_timer_thread_).
     std::mutex teardown_mu_;
 
     // ── io_thread_ entry point ──────────────────────────────────────────────────
@@ -432,10 +419,6 @@ struct vc_client {
     // Convenience event emitters.
     void emit_error(vc_result r, const char* text);
     void emit_disconnected(vc_result r, const char* reason);
-
-#else  // !VOICECAT_HAS_NET
-    vc_connection_state state_{VC_STATE_DISCONNECTED};
-#endif
 };
 
 #endif  // VOICECAT_CORE_CLIENT_H

core/src/core/worker_pool.h

@@ -4,13 +4,10 @@
  * Used for Argon2id password hashing (deliberately slow) and TLS handshakes so
  * neither blocks the net thread. Real-time audio threads never use this.
  *
- * Requires VOICECAT_HAS_NET (Asio). Undefined when building without deps.
  */
 #ifndef VOICECAT_CORE_WORKER_POOL_H
 #define VOICECAT_CORE_WORKER_POOL_H
 
-#ifdef VOICECAT_HAS_NET
-
 #include <asio/thread_pool.hpp>
 #include <asio/post.hpp>
 #include <cstddef>
@@ -37,5 +34,4 @@ class WorkerPool {
 
 }  // namespace voicecat
 
-#endif  // VOICECAT_HAS_NET
 #endif  // VOICECAT_CORE_WORKER_POOL_H

core/src/crypto/crypto.cpp

@@ -1,7 +1,5 @@
 #include "crypto/crypto.h"
 
-#ifdef VOICECAT_HAS_NET
-
 #include <cstring>
 #include <fstream>
 #include <sstream>
@@ -406,5 +404,3 @@ long SodiumMediaCrypto::open(const uint8_t* sealed, size_t len, const uint8_t* a
 }
 
 }  // namespace voicecat::crypto
-
-#endif  // VOICECAT_HAS_NET

core/src/crypto/crypto.h

@@ -12,8 +12,6 @@
 #include <cstdint>
 #include <string>
 
-#ifdef VOICECAT_HAS_NET
-
 #include <array>
 #include <filesystem>
 #include <functional>
@@ -186,25 +184,4 @@ class SodiumMediaCrypto final : public MediaCrypto {
 
 }  // namespace voicecat::crypto
 
-#else  // !VOICECAT_HAS_NET — skeleton stubs
-
-namespace voicecat::crypto {
-
-class MediaCrypto {
-   public:
-    virtual ~MediaCrypto() = default;
-    virtual long seal(const uint8_t*, size_t, const uint8_t*, size_t, uint8_t*, size_t) = 0;
-    virtual long open(const uint8_t*, size_t, const uint8_t*, size_t, uint8_t*, size_t) = 0;
-};
-
-class SodiumMediaCrypto final : public MediaCrypto {
-   public:
-    long seal(const uint8_t*, size_t, const uint8_t*, size_t, uint8_t*, size_t) override { return -1; }
-    long open(const uint8_t*, size_t, const uint8_t*, size_t, uint8_t*, size_t) override { return -1; }
-    uint64_t peek_send_counter() const { return 0; }
-};
-
-}  // namespace voicecat::crypto
-
-#endif  // VOICECAT_HAS_NET
 #endif  // VOICECAT_CRYPTO_CRYPTO_H

core/src/crypto/tofu_store.cpp

@@ -1,7 +1,5 @@
 #include "crypto/tofu_store.h"
 
-#ifdef VOICECAT_HAS_NET
-
 #include <fstream>
 #include <sstream>
 #include <stdexcept>
@@ -93,5 +91,3 @@ void TofuStore::save() const {
 }
 
 }  // namespace voicecat::crypto
-
-#endif  // VOICECAT_HAS_NET

core/src/crypto/tofu_store.h

@@ -7,8 +7,6 @@
 #ifndef VOICECAT_CRYPTO_TOFU_STORE_H
 #define VOICECAT_CRYPTO_TOFU_STORE_H
 
-#ifdef VOICECAT_HAS_NET
-
 #include <array>
 #include <filesystem>
 #include <mutex>
@@ -62,5 +60,4 @@ class TofuStore {
 
 }  // namespace voicecat::crypto
 
-#endif  // VOICECAT_HAS_NET
 #endif  // VOICECAT_CRYPTO_TOFU_STORE_H

core/src/net/transport.cpp

@@ -1,7 +1,5 @@
 #include "net/transport.h"
 
-#ifdef VOICECAT_HAS_NET
-
 #include <cstring>
 
 #include "crypto/crypto.h"
@@ -483,5 +481,3 @@ asio::ip::udp::endpoint UdpMediaChannel::local_endpoint() const {
 }
 
 }  // namespace voicecat::net
-
-#endif  // VOICECAT_HAS_NET

core/src/net/transport.h

@@ -4,9 +4,8 @@
  * Design: docs/architecture.md (Net thread), docs/protocol.md §1 (framing).
  * Implementation uses standalone Asio for sockets and timers.
  *
- * The real classes are compiled only when VOICECAT_HAS_NET is defined (dev/release/
- * server-release — vcpkg deps on). The skeleton-preset stub definitions below keep the
- * no-deps build green.
+ * Design: docs/architecture.md (Net thread), docs/protocol.md §1 (framing).
+ * Implementation uses standalone Asio for sockets and timers.
  */
 #ifndef VOICECAT_NET_TRANSPORT_H
 #define VOICECAT_NET_TRANSPORT_H
@@ -14,8 +13,6 @@
 #include <cstdint>
 #include <string>
 
-#ifdef VOICECAT_HAS_NET
-
 #define ASIO_STANDALONE 1
 #include <asio.hpp>
 
@@ -226,21 +223,4 @@ class UdpMediaChannel {
 
 }  // namespace voicecat::net
 
-#else  // !VOICECAT_HAS_NET — skeleton stubs for the dev preset
-
-namespace voicecat::net {
-
-class TcpControlChannel {
-   public:
-    bool connected() const { return false; }
-};
-
-class UdpMediaChannel {
-   public:
-    bool bound() const { return false; }
-};
-
-}  // namespace voicecat::net
-
-#endif  // VOICECAT_HAS_NET
 #endif  // VOICECAT_NET_TRANSPORT_H

core/src/protocol/envelope.cpp

@@ -1,7 +1,5 @@
 #include "protocol/envelope.h"
 
-#ifdef VOICECAT_HAS_NET
-
 #include "protocol/protocol.h"
 
 #include <atomic>
@@ -30,5 +28,3 @@ uint64_t next_request_id() {
 }
 
 }  // namespace voicecat::protocol
-
-#endif  // VOICECAT_HAS_NET

core/src/protocol/envelope.h

@@ -5,13 +5,10 @@
  * envelopes without touching proto types directly. All callers that do need
  * the proto types can #include the generated header alongside this one.
  *
- * Requires VOICECAT_HAS_NET (protobuf codegen).
  */
 #ifndef VOICECAT_PROTOCOL_ENVELOPE_H
 #define VOICECAT_PROTOCOL_ENVELOPE_H
 
-#ifdef VOICECAT_HAS_NET
-
 #include <cstddef>
 #include <cstdint>
 #include <vector>
@@ -35,5 +32,4 @@ uint64_t next_request_id();
 
 }  // namespace voicecat::protocol
 
-#endif  // VOICECAT_HAS_NET
 #endif  // VOICECAT_PROTOCOL_ENVELOPE_H

core/src/session/session.cpp

@@ -23,8 +23,6 @@ std::pair<const User*, const Stream*> SessionModel::find_user_by_ssrc(uint32_t s
     return {nullptr, nullptr};
 }
 
-#ifdef VOICECAT_HAS_NET
-
 namespace {
 
 void copy_channel_audio(Channel& ch, const voicecat::v1::AudioConfig& a) {
@@ -160,6 +158,4 @@ void SessionModel::apply_channel_event(const voicecat::v1::ChannelEvent& ev) {
     }
 }
 
-#endif  // VOICECAT_HAS_NET
-
 }  // namespace voicecat::session

core/src/session/session.h

@@ -12,9 +12,7 @@
 #include <utility>
 #include <vector>
 
-#ifdef VOICECAT_HAS_NET
 #include "proto/voicecat.pb.h"
-#endif
 
 namespace voicecat::session {
 
@@ -88,11 +86,9 @@ class SessionModel {
     // Returns {nullptr, nullptr} if not found.
     std::pair<const User*, const Stream*> find_user_by_ssrc(uint32_t ssrc) const;
 
-#ifdef VOICECAT_HAS_NET
     void apply_snapshot(const voicecat::v1::ServerStateSnapshot& snap);
     void apply_user_event(const voicecat::v1::UserEvent& ev);
     void apply_channel_event(const voicecat::v1::ChannelEvent& ev);
-#endif
 
    private:
     std::vector<Channel> channels_;