feat(voice): Pas 7 — discord_voice.py slash group + discord_bot wiring (CONVERGENCE)

src/adapters/discord_voice.py (NEW, ~280 linii):
- /voice slash group cu subcommands: join, leave, doctor, mirror on|off,
  record on|off
- warmup_models() async — eager faster-whisper + silero-vad load la
  on_ready pe background task
- _voice_load_error guard — /voice join responds ephemeral graceful
  dacă models load fail
- _voice_sessions: dict[int, VoiceSession] keyed pe guild_id
- _get_whitelist() re-reads config la fiecare apel — runtime edits la
  voice.allowed_user_ids fără bot restart
- Double-join guard, try/except graceful pe connect/listen/play/presence
- /voice doctor surfaces _voice_load_error + libopus state ephemeral
- await interaction.response.defer(ephemeral=True) în orice voice
  command (Discord 3s timeout pattern din CLAUDE.md)

src/adapters/discord_bot.py — 3 surgical edits:
- Linia 115: intents.voice_states = True (după intents.message_content)
- Liniile 963-966: import + register_voice(tree, client) +
  tree.add_command(voice_group), după /audio body
- Liniile 1126-1130: discord_voice._models_warmup_future =
  asyncio.create_task(discord_voice.warmup_models()) la end of on_ready

Adapted la pipeline.py API actual (channel_id int nu str, kw-only args
după *, EchoVoiceSink(session, bot_user_id) signature, loop kwarg
mandatory pentru cross-thread bot.change_presence).

Smoke import OK. test_discord.py 61 pass / 4 fail (pre-existing pe
master, verificat via git stash). test_voice_session_cleanup 5/5 +
test_voice_adapter_contract 22/22.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/adapters/discord_bot.py

@@ -112,6 +112,7 @@ def create_bot(config: Config) -> discord.Client:
 
     intents = discord.Intents.default()
     intents.message_content = True
+    intents.voice_states = True
 
     client = discord.Client(intents=intents)
     tree = app_commands.CommandTree(client)
@@ -958,6 +959,11 @@ def create_bot(config: Config) -> discord.Client:
         else:
             await interaction.followup.send(result or "Eroare TTS.")
 
+    # Voice slash group (Pas 7)
+    from src.adapters.discord_voice import register as register_voice
+    voice_group = register_voice(tree, client)
+    tree.add_command(voice_group)
+
     # --- Ralph commands (autonomous project execution) ---
 
     async def _autocomplete_by_status(
@@ -1118,6 +1124,11 @@ def create_bot(config: Config) -> discord.Client:
         from datetime import datetime, timezone
         client._ready_at = datetime.now(timezone.utc)
         logger.info("Echo Core online as %s", client.user)
+        # Voice models eager warmup (Pas 7)
+        from src.adapters import discord_voice
+        discord_voice._models_warmup_future = asyncio.create_task(
+            discord_voice.warmup_models()
+        )
 
     async def _handle_chat(message: discord.Message) -> None:
         """Process a chat message through the router and send the response."""

src/adapters/discord_voice.py

@@ -0,0 +1,296 @@
+"""Discord voice slash commands (Pas 7 — CONVERGENCE wiring).
+
+Registers the `/voice` slash command group on the existing CommandTree and
+exposes an async `warmup_models()` for eager model load at bot startup.
+
+Owns nothing in `src/voice/*` — purely the Discord-facing wiring. Defers
+heavy lifting to:
+
+- ``src.voice.pipeline.VoiceSession`` — per-guild session state machine
+- ``src.voice.pipeline.EchoVoiceSink`` — discord-ext-voice-recv sink
+- ``src.voice.tts_stream.TTSQueue`` / ``EchoStreamingAudioSource``
+- ``src.voice._discord_voice_adapter.connect_voice``
+"""
+
+from __future__ import annotations
+
+import asyncio
+import logging
+from typing import Optional
+
+import discord
+from discord import app_commands
+
+from src.config import Config
+from src.voice.pipeline import (
+    VoiceSession,
+    EchoVoiceSink,
+    _get_whisper_model,
+    _get_silero_vad,
+)
+from src.voice.tts_stream import TTSQueue
+from src.voice._discord_voice_adapter import connect_voice
+
+log = logging.getLogger("echo-core.discord.voice")
+
+# Per-guild voice session registry. Key = guild_id.
+_voice_sessions: dict[int, VoiceSession] = {}
+
+# Set if model warmup failed; surfaces as ephemeral error on /voice join.
+_voice_load_error: Optional[str] = None
+
+# Reference to the eager warmup task created in on_ready, so /voice join can
+# await it if the user is faster than the background load.
+_models_warmup_future: Optional[asyncio.Task] = None
+
+
+async def warmup_models() -> None:
+    """Eager model load — called from `on_ready()` as a background task.
+
+    Runs the (synchronous, blocking) model loaders on a worker thread so the
+    event loop stays responsive. On failure, sets `_voice_load_error` instead
+    of raising, so `/voice join` can degrade gracefully.
+    """
+    global _voice_load_error
+    try:
+        await asyncio.to_thread(_get_whisper_model)
+        await asyncio.to_thread(_get_silero_vad)
+        log.info("Voice models warm")
+    except Exception as e:
+        _voice_load_error = f"{type(e).__name__}: {e}"
+        log.error("Voice models load failed: %s", _voice_load_error)
+
+
+def _get_whitelist() -> set[int]:
+    """Read `voice.allowed_user_ids` from config and coerce to int set.
+
+    Re-reads config from disk to pick up any runtime edits between bot start
+    and /voice join.
+    """
+    try:
+        raw = Config().get("voice.allowed_user_ids", [])
+    except Exception:
+        raw = []
+    out: set[int] = set()
+    for v in raw or []:
+        try:
+            out.add(int(v))
+        except (TypeError, ValueError):
+            continue
+    return out
+
+
+def _get_default_voice() -> str:
+    try:
+        return Config().get("voice.default_voice", "M2") or "M2"
+    except Exception:
+        return "M2"
+
+
+def register(tree: app_commands.CommandTree, bot: discord.Client) -> app_commands.Group:
+    """Build the `/voice` slash command group and return it (caller registers)."""
+    voice_group = app_commands.Group(
+        name="voice", description="Echo Core voice channel"
+    )
+
+    @voice_group.command(name="join", description="Echo intră în voice channel-ul tău")
+    async def join(interaction: discord.Interaction) -> None:
+        await interaction.response.defer(ephemeral=True)
+        if _voice_load_error:
+            await interaction.followup.send(
+                f"Voice unavailable: {_voice_load_error}", ephemeral=True
+            )
+            return
+        if _models_warmup_future is not None and not _models_warmup_future.done():
+            try:
+                await _models_warmup_future
+            except Exception as e:
+                await interaction.followup.send(
+                    f"Voice unavailable: {type(e).__name__}: {e}", ephemeral=True
+                )
+                return
+        user = interaction.user
+        if not isinstance(user, discord.Member) or user.voice is None or user.voice.channel is None:
+            await interaction.followup.send(
+                "Intră într-un voice channel întâi.", ephemeral=True
+            )
+            return
+        channel = user.voice.channel
+        whitelist = _get_whitelist()
+        if user.id not in whitelist:
+            await interaction.followup.send(
+                "Nu ești pe whitelist voice.", ephemeral=True
+            )
+            return
+        # Reject double-join on the same guild.
+        guild_id = channel.guild.id
+        if guild_id in _voice_sessions:
+            await interaction.followup.send(
+                "Sunt deja în voice pe acest server. Folosește /voice leave întâi.",
+                ephemeral=True,
+            )
+            return
+        # Connect
+        try:
+            vc = await connect_voice(channel)
+        except Exception as e:
+            log.exception("connect_voice failed")
+            await interaction.followup.send(
+                f"Conectare eșuată: {type(e).__name__}: {e}", ephemeral=True
+            )
+            return
+        # Build TTS queue + session
+        ttsq = TTSQueue(voice_id=_get_default_voice(), lang="ro")
+        ttsq.start()
+        try:
+            session = VoiceSession(
+                channel_id=channel.id,
+                guild_id=guild_id,
+                voice_client=vc,
+                text_channel=interaction.channel,
+                record_enabled=False,
+                mirror_enabled=True,
+                whitelist=whitelist,
+                ttsq=ttsq,
+                bot=bot,
+                loop=asyncio.get_running_loop(),
+            )
+        except Exception as e:
+            log.exception("VoiceSession construction failed")
+            ttsq.stop()
+            try:
+                await vc.disconnect(force=True)
+            except Exception:
+                pass
+            await interaction.followup.send(
+                f"Sesiune voice eșuată: {type(e).__name__}: {e}", ephemeral=True
+            )
+            return
+        _voice_sessions[guild_id] = session
+        # Wake-up beep
+        try:
+            vc.play(discord.FFmpegPCMAudio("assets/voice/beep_200ms.wav"))
+        except Exception:
+            log.warning("Beep playback skipped", exc_info=True)
+        # Attach sink
+        try:
+            bot_user_id = int(bot.user.id) if bot.user is not None else 0
+            sink = EchoVoiceSink(session=session, bot_user_id=bot_user_id)
+            vc.listen(sink)
+        except Exception as e:
+            log.exception("Sink attach failed")
+            _voice_sessions.pop(guild_id, None)
+            try:
+                session.cleanup("sink_attach_failed")
+            except Exception:
+                pass
+            await interaction.followup.send(
+                f"Atașare sink eșuată: {type(e).__name__}: {e}", ephemeral=True
+            )
+            return
+        # Presence
+        try:
+            await bot.change_presence(activity=discord.Activity(
+                type=discord.ActivityType.listening,
+                name=f"{user.display_name} în #{channel.name}",
+            ))
+        except Exception:
+            log.warning("Presence update skipped", exc_info=True)
+        await interaction.followup.send(
+            f"În voce în #{channel.name}.", ephemeral=True
+        )
+
+    @voice_group.command(name="leave", description="Echo iese din voice channel")
+    async def leave(interaction: discord.Interaction) -> None:
+        await interaction.response.defer(ephemeral=True)
+        guild_id = interaction.guild.id if interaction.guild else None
+        session = _voice_sessions.pop(guild_id, None) if guild_id is not None else None
+        if session is None:
+            await interaction.followup.send(
+                "Nu sunt în niciun voice channel aici.", ephemeral=True
+            )
+            return
+        try:
+            session.cleanup("user_leave")
+        except Exception:
+            log.exception("session.cleanup raised")
+        try:
+            await bot.change_presence(activity=None)
+        except Exception:
+            log.warning("Presence reset skipped", exc_info=True)
+        await interaction.followup.send("Plecat.", ephemeral=True)
+
+    @voice_group.command(name="doctor", description="Verifică voice stack")
+    async def doctor(interaction: discord.Interaction) -> None:
+        await interaction.response.defer(ephemeral=True)
+        checks: list[tuple[str, bool]] = []
+        # libopus
+        try:
+            checks.append(("libopus", bool(discord.opus.is_loaded())))
+        except Exception:
+            checks.append(("libopus", False))
+        # warmup
+        checks.append(("voice load error", _voice_load_error is None))
+        # Build response
+        lines = ["**Voice doctor:**"]
+        for label, ok in checks:
+            lines.append(f"{'OK' if ok else 'FAIL'} — {label}")
+        if _voice_load_error:
+            lines.append(f"  details: {_voice_load_error}")
+        await interaction.followup.send("\n".join(lines), ephemeral=True)
+
+    # --- /voice mirror on|off ---
+    mirror_group = app_commands.Group(
+        name="mirror", description="Text mirror", parent=voice_group
+    )
+
+    @mirror_group.command(name="on", description="Activează text mirror în canal")
+    async def mirror_on(interaction: discord.Interaction) -> None:
+        await interaction.response.defer(ephemeral=True)
+        guild_id = interaction.guild.id if interaction.guild else None
+        s = _voice_sessions.get(guild_id) if guild_id is not None else None
+        if s is None:
+            await interaction.followup.send("Nu sunt în voice.", ephemeral=True)
+            return
+        s.mirror_enabled = True
+        await interaction.followup.send("Mirror ON.", ephemeral=True)
+
+    @mirror_group.command(name="off", description="Dezactivează text mirror")
+    async def mirror_off(interaction: discord.Interaction) -> None:
+        await interaction.response.defer(ephemeral=True)
+        guild_id = interaction.guild.id if interaction.guild else None
+        s = _voice_sessions.get(guild_id) if guild_id is not None else None
+        if s is None:
+            await interaction.followup.send("Nu sunt în voice.", ephemeral=True)
+            return
+        s.mirror_enabled = False
+        await interaction.followup.send("Mirror OFF.", ephemeral=True)
+
+    # --- /voice record on|off ---
+    record_group = app_commands.Group(
+        name="record", description="KB recording", parent=voice_group
+    )
+
+    @record_group.command(name="on", description="Activează înregistrare în KB")
+    async def record_on(interaction: discord.Interaction) -> None:
+        await interaction.response.defer(ephemeral=True)
+        guild_id = interaction.guild.id if interaction.guild else None
+        s = _voice_sessions.get(guild_id) if guild_id is not None else None
+        if s is None:
+            await interaction.followup.send("Nu sunt în voice.", ephemeral=True)
+            return
+        s.record_enabled = True
+        await interaction.followup.send("Record ON.", ephemeral=True)
+
+    @record_group.command(name="off", description="Dezactivează înregistrare")
+    async def record_off(interaction: discord.Interaction) -> None:
+        await interaction.response.defer(ephemeral=True)
+        guild_id = interaction.guild.id if interaction.guild else None
+        s = _voice_sessions.get(guild_id) if guild_id is not None else None
+        if s is None:
+            await interaction.followup.send("Nu sunt în voice.", ephemeral=True)
+            return
+        s.record_enabled = False
+        await interaction.followup.send("Record OFF.", ephemeral=True)
+
+    return voice_group