"""
Gateway configuration management.

Handles loading and validating configuration for:
- Connected platforms (Telegram, Discord, WhatsApp, Weixin, and more)
- Home channels for each platform
- Session reset policies
- Delivery preferences
"""

import logging
import math
import os
import json
from pathlib import Path
from dataclasses import asdict, dataclass, field, is_dataclass
from typing import Dict, List, Optional, Any, Callable
from enum import Enum

from hermes_cli.config import get_hermes_home
from agent.secret_scope import current_secret_scope, get_secret as _get_secret
from gateway.shutdown_watchdog import (
    DEFAULT_LOOP_WATCHDOG_INTERVAL_S,
    DEFAULT_LOOP_WATCHDOG_MAX_STRIKES,
    DEFAULT_LOOP_WATCHDOG_TIMEOUT_S,
)
from utils import is_truthy_value

logger = logging.getLogger(__name__)


def _coerce_bool(value: Any, default: bool = True) -> bool:
    """Coerce bool-ish config values, preserving a caller-provided default."""
    if value is None:
        return default
    if isinstance(value, str):
        lowered = value.strip().lower()
        if lowered in {"true", "1", "yes", "on"}:
            return True
        if lowered in {"false", "0", "no", "off"}:
            return False
        return default
    return is_truthy_value(value, default=default)


def _normalize_multiplex_profile_allowlist(value: Any) -> Optional[List[str]]:
    """Normalize the optional named-profile allowlist.

    ``None`` preserves the historical serve-all behavior. A malformed outer
    value fails safe to an empty list (default profile only); malformed list
    entries are skipped with a warning.
    """
    if value is None:
        return None
    if not isinstance(value, list):
        logger.warning(
            "Invalid gateway.multiplex_profile_allowlist (expected a list, got %s); "
            "serving only the default profile",
            type(value).__name__,
        )
        return []

    from hermes_cli.profiles import normalize_profile_name, validate_profile_name

    normalized: List[str] = []
    seen = set()
    for entry in value:
        if not isinstance(entry, str):
            logger.warning(
                "Skipping invalid gateway.multiplex_profile_allowlist entry %r "
                "(expected a profile name)",
                entry,
            )
            continue
        try:
            name = normalize_profile_name(entry)
            validate_profile_name(name)
        except ValueError:
            logger.warning(
                "Skipping invalid gateway.multiplex_profile_allowlist entry %r",
                entry,
            )
            continue
        if name == "default" or name in seen:
            continue
        seen.add(name)
        normalized.append(name)
    return normalized


# Recognized truthy / falsy tokens for the GATEWAY_MULTIPLEX_PROFILES operator
# override. Anything not in either set — and a blank/whitespace value — is
# treated as "unset" so it falls through to config.yaml rather than silently
# forcing the flag off.
_MULTIPLEX_TRUTHY_STRINGS = frozenset({"1", "true", "yes", "on"})
_MULTIPLEX_FALSY_STRINGS = frozenset({"0", "false", "no", "off"})


def _env_multiplex_profiles_override() -> "bool | None":
    """Resolve the GATEWAY_MULTIPLEX_PROFILES operator override.

    Returns ``True``/``False`` when the env var is set to a recognized truthy/
    falsy token, or ``None`` when it is unset, blank, or unrecognized — in which
    case the caller keeps the config.yaml value (env > config > default). Blank
    is deliberately ``None``, not ``False``: a provisioned-but-unpopulated Fly
    secret arrives as ``""`` and must NOT shadow a config.yaml opt-in.
    """
    raw = os.getenv("GATEWAY_MULTIPLEX_PROFILES")
    if raw is None:
        return None
    token = raw.strip().lower()
    if not token:
        return None
    if token in _MULTIPLEX_TRUTHY_STRINGS:
        return True
    if token in _MULTIPLEX_FALSY_STRINGS:
        return False
    logger.warning(
        "Ignoring unrecognized GATEWAY_MULTIPLEX_PROFILES=%r "
        "(expected one of %s or %s); falling back to config.yaml.",
        raw,
        sorted(_MULTIPLEX_TRUTHY_STRINGS),
        sorted(_MULTIPLEX_FALSY_STRINGS),
    )
    return None


def _normalize_transport_token(value: Any) -> str:
    """Normalize a streaming transport/mode value to a canonical token.

    Handles the YAML 1.1 boolean quirk where bare ``on`` / ``off`` parse to
    Python ``True`` / ``False`` (see ``gateway/display_config.py`` ``_normalise``).
    Without this, ``mode: off`` arrives as boolean ``False`` and stringifying it
    yields ``"false"`` instead of the advertised ``"off"``, so streaming would be
    enabled instead of disabled. Booleans map to ``"auto"`` (True) / ``"off"``
    (False); anything else is lower-cased, defaulting to ``"auto"``.
    """
    if value is None:
        return "auto"
    if isinstance(value, bool):
        return "auto" if value else "off"
    return str(value).strip().lower() or "auto"


def _coerce_float(value: Any, default: float) -> float:
    """Coerce numeric config values, falling back on malformed input."""
    if value is None:
        return default
    try:
        return float(value)
    except (TypeError, ValueError):
        return default


def _coerce_int(value: Any, default: int) -> int:
    """Coerce integer config values, falling back on malformed input."""
    if value is None:
        return default
    try:
        return int(value)
    except (TypeError, ValueError, OverflowError):
        # OverflowError: int(float("inf")) — a non-finite YAML value must
        # degrade to the default, not abort gateway config loading.
        return default


def _coerce_optional_positive_int(value: Any, key: str) -> Optional[int]:
    """Coerce an optional positive integer config value.

    ``None``/0/negative disable the setting. Malformed values are ignored with
    a warning so a typo never prevents the gateway from starting.
    """
    if value is None:
        return None
    if isinstance(value, bool):
        logger.warning(
            "Ignoring invalid %s=%r (expected a positive integer; 0/null disables)",
            key,
            value,
        )
        return None
    try:
        if isinstance(value, float):
            if not value.is_integer():
                raise ValueError(value)
            parsed = int(value)
        elif isinstance(value, str):
            parsed = int(value.strip(), 10)
        else:
            parsed = int(value)
    except (TypeError, ValueError):
        logger.warning(
            "Ignoring invalid %s=%r (expected a positive integer; 0/null disables)",
            key,
            value,
        )
        return None
    if parsed <= 0:
        return None
    return parsed


_SYSTEMD_WATCHDOG_MAX_SECONDS = 2_147_483_647


def coerce_systemd_watchdog_seconds(
    value: Any, key: str = "gateway.systemd_watchdog_seconds"
) -> int:
    """Return a bounded positive watchdog interval or zero when disabled.

    Runtime and service generation share this normalization so a value can
    never enable ``Type=notify`` while disabling application heartbeats.
    """
    if value is None:
        return 0
    if isinstance(value, bool):
        logger.warning("Ignoring invalid %s (expected a positive integer)", key)
        return 0
    if isinstance(value, int):
        parsed = value
    elif isinstance(value, str):
        raw = value.strip()
        if not raw or not raw.isascii() or not raw.isdecimal():
            logger.warning("Ignoring invalid %s (expected a positive integer)", key)
            return 0
        try:
            parsed = int(raw, 10)
        except (TypeError, ValueError, OverflowError):
            logger.warning("Ignoring invalid %s (expected a positive integer)", key)
            return 0
    else:
        logger.warning("Ignoring invalid %s (expected a positive integer)", key)
        return 0
    if parsed == 0:
        return 0
    if not 0 < parsed <= _SYSTEMD_WATCHDOG_MAX_SECONDS:
        logger.warning(
            "Ignoring invalid %s (expected an integer from 1 to %d)",
            key,
            _SYSTEMD_WATCHDOG_MAX_SECONDS,
        )
        return 0
    return parsed


def _coerce_dict(value: Any) -> Dict[str, Any]:
    """Return *value* when it is a mapping, otherwise an empty dict."""
    return value if isinstance(value, dict) else {}


def _normalize_unauthorized_dm_behavior(value: Any, default: str = "pair") -> str:
    """Normalize unauthorized DM behavior to a supported value."""
    if isinstance(value, str):
        normalized = value.strip().lower()
        if normalized in {"pair", "ignore"}:
            return normalized
    return default


def _normalize_notice_delivery(value: Any, default: str = "public") -> str:
    """Normalize notice delivery mode to a supported value."""
    if isinstance(value, str):
        normalized = value.strip().lower()
        if normalized in {"public", "private"}:
            return normalized
    return default


def _ensure_platform_extra_dict(platforms_data: dict, name: str) -> tuple[dict, dict]:
    """Get-or-create ``platforms_data[name]`` and its nested ``extra`` dict.

    Both slots are coerced to ``{}`` if a non-dict value is encountered, so
    callers can safely write keys without type-checking.  Returns
    ``(plat_data, extra)`` for in-place mutation.
    """
    plat_data = platforms_data.setdefault(name, {})
    if not isinstance(plat_data, dict):
        plat_data = {}
        platforms_data[name] = plat_data
    extra = plat_data.setdefault("extra", {})
    if not isinstance(extra, dict):
        extra = {}
        plat_data["extra"] = extra
    return plat_data, extra


def _getenv(name: str, default: Optional[str] = None) -> Optional[str]:
    """Read env vars through the active profile secret scope when present.

    ``load_gateway_config()`` runs in many contexts, including multiplexed
    profile startup where ``_profile_runtime_scope`` installs per-profile
    secrets. In that scope we must prefer the scoped value; outside it we keep
    legacy ``os.getenv`` behavior for single-profile callers and unscoped
    gateway reads.
    """
    if current_secret_scope() is not None:
        scope_val = _get_secret(name, None)
        return scope_val if scope_val is not None else default
    env_val = os.environ.get(name)
    if env_val is not None:
        return env_val
    return default


def _getenv_str(name: str, default: str = "") -> str:
    val = _getenv(name, default)
    return val if val is not None else default


def _getenv_int(name: str, default: int) -> int:
    raw = _getenv(name, None)
    if raw is None:
        return default
    try:
        return int(str(raw).strip(), 10)
    except (TypeError, ValueError):
        return default


# Module-level cache for bundled platform plugin names (lives outside the
# enum so it doesn't become an accidental enum member).
_Platform__bundled_plugin_names: Optional[set] = None


class Platform(Enum):
    """Supported messaging platforms.

    Built-in platforms have explicit members.  Plugin platforms use dynamic
    members created on-demand by ``_missing_()`` so that
    ``Platform("irc")`` works without modifying this enum.  Dynamic members
    are cached in ``_value2member_map_`` for identity-stable comparisons.
    """
    LOCAL = "local"
    TELEGRAM = "telegram"
    DISCORD = "discord"
    WHATSAPP = "whatsapp"
    WHATSAPP_CLOUD = "whatsapp_cloud"
    SLACK = "slack"
    SIGNAL = "signal"
    MATTERMOST = "mattermost"
    MATRIX = "matrix"
    HOMEASSISTANT = "homeassistant"
    EMAIL = "email"
    SMS = "sms"
    DINGTALK = "dingtalk"
    API_SERVER = "api_server"
    WEBHOOK = "webhook"
    MSGRAPH_WEBHOOK = "msgraph_webhook"
    FEISHU = "feishu"
    WECOM = "wecom"
    WECOM_CALLBACK = "wecom_callback"
    WEIXIN = "weixin"
    BLUEBUBBLES = "bluebubbles"
    QQBOT = "qqbot"
    YUANBAO = "yuanbao"
    RELAY = "relay"  # generic relay adapter fronted by the connector (EXPERIMENTAL)
    @classmethod
    def _missing_(cls, value):
        """Accept unknown platform names only for known plugin adapters.

        Creates a pseudo-member cached in ``_value2member_map_`` so that
        ``Platform("irc") is Platform("irc")`` holds True (identity-stable).
        Arbitrary strings are rejected to prevent enum pollution.
        """
        if not isinstance(value, str) or not value.strip():
            return None
        # Normalise to lowercase to avoid case mismatches in config
        value = value.strip().lower()
        # Check cache first (another call may have created it already)
        if value in cls._value2member_map_:
            return cls._value2member_map_[value]

        # Only create pseudo-members for bundled plugin platforms (discovered
        # via filesystem scan) or runtime-registered plugin platforms.
        global _Platform__bundled_plugin_names
        if _Platform__bundled_plugin_names is None:
            _Platform__bundled_plugin_names = cls._scan_bundled_plugin_platforms()
        if value in _Platform__bundled_plugin_names:
            pseudo = object.__new__(cls)
            pseudo._value_ = value
            pseudo._name_ = value.upper().replace("-", "_").replace(" ", "_")
            cls._value2member_map_[value] = pseudo
            cls._member_map_[pseudo._name_] = pseudo
            return pseudo

        # Runtime-registered plugins (e.g. user-installed, discovered after
        # the enum was defined).
        try:
            from gateway.platform_registry import platform_registry
            if platform_registry.is_registered(value):
                pseudo = object.__new__(cls)
                pseudo._value_ = value
                pseudo._name_ = value.upper().replace("-", "_").replace(" ", "_")
                cls._value2member_map_[value] = pseudo
                cls._member_map_[pseudo._name_] = pseudo
                return pseudo
        except Exception:
            pass

        return None

    @classmethod
    def _scan_bundled_plugin_platforms(cls) -> set:
        """Return names of bundled platform plugins under ``plugins/platforms/``."""
        names: set = set()
        try:
            platforms_dir = Path(__file__).parent.parent / "plugins" / "platforms"
            if platforms_dir.is_dir():
                for child in platforms_dir.iterdir():
                    if (
                        child.is_dir()
                        and (child / "__init__.py").exists()
                        and (
                            (child / "plugin.yaml").exists()
                            or (child / "plugin.yml").exists()
                        )
                    ):
                        names.add(child.name.lower())
        except Exception:
            pass
        return names


# Snapshot of built-in platform values before any dynamic _missing_ lookups.
# Used to distinguish real platforms from arbitrary strings.
_BUILTIN_PLATFORM_VALUES = frozenset(m.value for m in Platform.__members__.values())


# Platforms that bind a host TCP port (HTTP/webhook listeners). In a profile
# multiplexer the default profile owns the single shared listener and serves
# every profile through the /p/<profile>/ URL prefix, so a SECONDARY profile
# enabling one of these is always a misconfiguration: it would try to bind a
# port already held by the default's listener. Single source of truth for
# both the gateway's fail-fast startup validation (gateway/run.py) and the
# dashboard's pre-write mutation validation (hermes_cli/web_server.py) so
# the two policies cannot drift. Stored as platform .value strings.
PORT_BINDING_PLATFORM_VALUES = frozenset({
    "webhook",
    "api_server",
    "msgraph_webhook",
    "feishu",
    "wecom_callback",
    "bluebubbles",
    "sms",
    "whatsapp_cloud",
    "line",
    "teams",
})

# Platforms whose port-binding status depends on connection mode. Feishu in
# websocket mode (its default) uses an outbound long connection — no listener.
# Only webhook/callback mode binds a port. Maps platform value → the mode
# value that actually binds (#52563).
PORT_BINDING_CONDITIONAL_MODES: dict[str, str] = {
    "feishu": "webhook",
}


def platform_binds_port(platform_value: str, extra: Optional[dict] = None) -> bool:
    """Return True when *platform_value* actually binds a port for *extra* config.

    Mode-conditional platforms (Feishu) only bind in their listener mode;
    everything else in ``PORT_BINDING_PLATFORM_VALUES`` always binds.
    """
    if platform_value not in PORT_BINDING_PLATFORM_VALUES:
        return False
    expected_mode = PORT_BINDING_CONDITIONAL_MODES.get(platform_value)
    if expected_mode is not None:
        actual = str((extra or {}).get("connection_mode", "websocket")).strip().lower()
        return actual == expected_mode
    return True


@dataclass
class HomeChannel:
    """
    Default destination for a platform.
    
    When a cron job specifies deliver="telegram" without a specific chat ID,
    messages are sent to this home channel. Thread-aware platforms may also
    store a thread/topic ID so the bare platform target routes to the exact
    conversation where /sethome was run.
    """
    platform: Platform
    chat_id: str
    name: str  # Human-readable name for display
    thread_id: Optional[str] = None
    # Authenticated logical-target provenance observed by a platform adapter.
    # Relay egress re-attaches these values, but the connector remains the
    # authorization boundary and resolves them against its authoritative stores.
    user_id: Optional[str] = None
    scope_id: Optional[str] = None
    
    def to_dict(self) -> Dict[str, Any]:
        result = {
            "platform": self.platform.value,
            "chat_id": self.chat_id,
            "name": self.name,
        }
        if self.thread_id:
            result["thread_id"] = self.thread_id
        if self.user_id:
            result["user_id"] = self.user_id
        if self.scope_id:
            result["scope_id"] = self.scope_id
        return result
    
    @classmethod
    def from_dict(cls, data: Dict[str, Any]) -> "HomeChannel":
        return cls(
            platform=Platform(data["platform"]),
            chat_id=str(data["chat_id"]),
            name=data.get("name", "Home"),
            thread_id=str(data["thread_id"]) if data.get("thread_id") else None,
            user_id=str(data["user_id"]) if data.get("user_id") else None,
            scope_id=str(data["scope_id"]) if data.get("scope_id") else None,
        )


def persist_home_channel(home: HomeChannel, *, enabled_if_new: bool = False) -> None:
    """Persist a logical home without falsely enabling a Relay-fronted adapter."""
    from hermes_cli.config import load_config, save_config

    config = load_config()
    platforms = config.setdefault("platforms", {})
    if not isinstance(platforms, dict):
        platforms = {}
        config["platforms"] = platforms
    platform_config = platforms.setdefault(home.platform.value, {})
    if not isinstance(platform_config, dict):
        platform_config = {}
        platforms[home.platform.value] = platform_config
    if enabled_if_new:
        platform_config.setdefault("enabled", True)
    platform_config["home_channel"] = home.to_dict()
    save_config(config)


@dataclass
class SessionResetPolicy:
    """
    Controls when sessions reset (lose context).
    
    Modes:
    - "daily": Reset at a specific hour each day
    - "idle": Reset after N minutes of inactivity
    - "both": Whichever triggers first (daily boundary OR idle timeout)
    - "none": Never auto-reset (context managed only by compression)

    Default is "none" — sessions never auto-reset unless the user opts in
    via the `session_reset` section in config.yaml (or gateway.json
    overrides). Changed July 2026 from "both" (24h idle + daily 4am), which
    surprised users who expected their conversations to persist.
    """
    mode: str = "none"  # "daily", "idle", "both", or "none"
    at_hour: int = 4  # Hour for daily reset (0-23, local time)
    idle_minutes: int = 1440  # Minutes of inactivity before reset (24 hours)
    notify: bool = True  # Send a notification to the user when auto-reset occurs
    notify_exclude_platforms: tuple = ("api_server", "webhook")  # Platforms that don't get reset notifications
    # A background process this many hours old (or older) no longer blocks
    # session idle/daily reset. A forgotten preview server should not keep a
    # session alive forever (#29177). The process is NOT killed — only ignored
    # by the reset guard. Raise this if you run legitimate multi-day jobs whose
    # liveness should pin the conversation open.
    bg_process_max_age_hours: int = 24

    def to_dict(self) -> Dict[str, Any]:
        return {
            "mode": self.mode,
            "at_hour": self.at_hour,
            "idle_minutes": self.idle_minutes,
            "notify": self.notify,
            "notify_exclude_platforms": list(self.notify_exclude_platforms),
            "bg_process_max_age_hours": self.bg_process_max_age_hours,
        }
    
    @classmethod
    def from_dict(cls, data: Dict[str, Any]) -> "SessionResetPolicy":
        data = _coerce_dict(data)
        # Handle both missing keys and explicit null values (YAML null → None)
        mode = data.get("mode")
        at_hour = data.get("at_hour")
        idle_minutes = data.get("idle_minutes")
        notify = data.get("notify")
        exclude = data.get("notify_exclude_platforms")
        bg_max_age = data.get("bg_process_max_age_hours")
        return cls(
            mode=mode if mode is not None else "none",
            at_hour=at_hour if at_hour is not None else 4,
            idle_minutes=idle_minutes if idle_minutes is not None else 1440,
            notify=_coerce_bool(notify, True),
            notify_exclude_platforms=tuple(exclude) if exclude is not None else ("api_server", "webhook"),
            bg_process_max_age_hours=bg_max_age if bg_max_age is not None else 24,
        )


@dataclass
class ChannelOverride:
    """
    Per-channel override for model, provider, and system prompt.

    Used in config under platforms.<name>.channel_overrides[channel_id].
    Enables different channels (e.g. Discord #daily vs #dev) to use different
    models and personas without running separate gateway instances.
    """
    model: Optional[str] = None
    provider: Optional[str] = None
    system_prompt: Optional[str] = None

    def to_dict(self) -> Dict[str, Any]:
        out: Dict[str, Any] = {}
        if self.model is not None:
            out["model"] = self.model
        if self.provider is not None:
            out["provider"] = self.provider
        if self.system_prompt is not None:
            out["system_prompt"] = self.system_prompt
        return out

    @classmethod
    def from_dict(cls, data: Dict[str, Any]) -> "ChannelOverride":
        if not data:
            return cls()
        return cls(
            model=data.get("model"),
            provider=data.get("provider"),
            system_prompt=data.get("system_prompt"),
        )


# Canonical map of platforms whose primary credential is ``PlatformConfig.token``
# and the env var it loads from. Used for empty-token warnings at config
# validation and by the multiplex primary-startup credential gate in
# ``gateway.run`` (#64674). Platforms absent from this map authenticate some
# other way (session files, port-bound webhooks, api_key-only) and must never
# be skipped for a missing token.
PLATFORM_TOKEN_ENV_NAMES: dict["Platform", str] = {
    Platform.TELEGRAM: "TELEGRAM_BOT_TOKEN",
    Platform.DISCORD: "DISCORD_BOT_TOKEN",
    Platform.SLACK: "SLACK_BOT_TOKEN",
    Platform.MATTERMOST: "MATTERMOST_TOKEN",
    Platform.MATRIX: "MATRIX_ACCESS_TOKEN",
    Platform.WEIXIN: "WEIXIN_TOKEN",
}


@dataclass
class PlatformConfig:
    """Configuration for a single messaging platform."""
    enabled: bool = False
    token: Optional[str] = None  # Bot token (Telegram, Discord)
    api_key: Optional[str] = None  # API key if different from token
    home_channel: Optional[HomeChannel] = None

    # Reply threading mode (Telegram/Slack)
    # - "off": Never thread replies to original message
    # - "first": Only first chunk threads to user's message (default)
    # - "all": All chunks in multi-part replies thread to user's message
    reply_to_mode: str = "first"

    # Whether the gateway is allowed to send "♻️ Gateway online" /
    # "♻ Gateway restarted" lifecycle notifications on this platform.
    # Default True preserves prior behavior. Set False on platforms used
    # by end users (e.g. Slack) where operator-flavored restart pings are
    # noise; keep True for back-channels where the operator wants them.
    gateway_restart_notification: bool = True

    # Whether the gateway shows a "typing…" / "is thinking…" status indicator
    # while the agent processes a message on this platform. Default True
    # preserves prior behavior. Set False on platforms where the indicator is
    # unwanted (e.g. Slack's assistant.threads.setStatus "is thinking…", which
    # disables the compose box, or any platform where users find the bubble
    # noisy). Drives the per-message _keep_typing refresh loop in
    # gateway/platforms/base.py.
    typing_indicator: bool = True

    # Custom text for the working-state line on platforms whose typing
    # indicator renders text rather than a native bubble: Slack's
    # assistant.threads.setStatus line (shown next to the bot name; needs the
    # assistant:write scope to render) and Google Chat's visible marker
    # message. None keeps each platform's built-in default ("is thinking..." /
    # "Hermes is thinking…"). Platforms with textless indicators (Discord,
    # Telegram, Matrix, …) ignore it.
    typing_status_text: Optional[str] = None

    # Per-channel model/provider/system_prompt overrides (channel_id -> ChannelOverride)
    channel_overrides: Dict[str, ChannelOverride] = field(default_factory=dict)

    # Platform-specific settings
    extra: Dict[str, Any] = field(default_factory=dict)

    def to_dict(self) -> Dict[str, Any]:
        result = {
            "enabled": self.enabled,
            "extra": self.extra,
            "reply_to_mode": self.reply_to_mode,
            "gateway_restart_notification": self.gateway_restart_notification,
            "typing_indicator": self.typing_indicator,
        }
        if self.typing_status_text is not None:
            result["typing_status_text"] = self.typing_status_text
        if self.token:
            result["token"] = self.token
        if self.api_key:
            result["api_key"] = self.api_key
        if self.home_channel:
            result["home_channel"] = self.home_channel.to_dict()
        if self.channel_overrides:
            result["channel_overrides"] = {
                cid: ov.to_dict() for cid, ov in self.channel_overrides.items()
            }
        return result

    @classmethod
    def from_dict(cls, data: Dict[str, Any]) -> "PlatformConfig":
        data = _coerce_dict(data)
        home_channel = None
        if isinstance(data.get("home_channel"), dict):
            home_channel = HomeChannel.from_dict(data["home_channel"])

        # gateway_restart_notification may be bridged into extra via the
        # shared-key loop in load_gateway_config(); check both top-level
        # and extra so YAML ``discord: gateway_restart_notification: false``
        # works without needing a separate platforms: block.
        extra = _coerce_dict(data.get("extra", {}))
        _grn = data.get("gateway_restart_notification")
        if _grn is None:
            _grn = extra.get("gateway_restart_notification")

        # typing_indicator mirrors gateway_restart_notification: it may arrive
        # top-level or bridged into extra by the shared-key loop in
        # load_gateway_config(), so check both.
        _typing = data.get("typing_indicator")
        if _typing is None:
            _typing = extra.get("typing_indicator")

        # typing_status_text takes the same two routes (top-level or bridged
        # into extra); string passthrough, no coercion.
        _typing_text = data.get("typing_status_text")
        if _typing_text is None:
            _typing_text = extra.get("typing_status_text")

        channel_overrides: Dict[str, ChannelOverride] = {}
        raw_overrides = data.get("channel_overrides") or {}
        if isinstance(raw_overrides, dict):
            for cid, ov_data in raw_overrides.items():
                if isinstance(ov_data, dict):
                    channel_overrides[str(cid)] = ChannelOverride.from_dict(ov_data)

        return cls(
            enabled=_coerce_bool(data.get("enabled"), False),
            token=data.get("token"),
            api_key=data.get("api_key"),
            home_channel=home_channel,
            reply_to_mode=data.get("reply_to_mode", "first"),
            gateway_restart_notification=_coerce_bool(_grn, True),
            typing_indicator=_coerce_bool(_typing, True),
            typing_status_text=_typing_text,
            channel_overrides=channel_overrides,
            extra=extra,
        )


# Streaming defaults — single source of truth so both StreamingConfig and
# StreamConsumerConfig agree on the out-of-the-box edit rhythm.  Tuned for
# Telegram's ~1 edit/s flood envelope: a touch under 1s lets the cadence
# breathe without bumping into rate limits, and a smaller buffer threshold
# makes short replies feel near-instant in DMs.
DEFAULT_STREAMING_EDIT_INTERVAL: float = 0.8
DEFAULT_STREAMING_BUFFER_THRESHOLD: int = 24
DEFAULT_STREAMING_CURSOR: str = " ▉"


@dataclass
class StreamingConfig:
    """Configuration for real-time token streaming to messaging platforms."""
    enabled: bool = False
    # Transport selection:
    #   "auto"  — prefer native streaming-draft updates when the platform
    #             supports them (Telegram sendMessageDraft, Bot API 9.5+);
    #             fall back to edit-based when not.
    #   "draft" — explicitly request native drafts; falls back to edit when
    #             the platform/chat doesn't support them.
    #   "edit"  — progressive editMessageText only (legacy behaviour).
    #   "off"   — disable streaming entirely.
    #
    # Default is "auto": prefer native draft streaming on platforms that
    # support it (Telegram DMs via sendMessageDraft, Bot API 9.5+) and fall
    # back to edit-based streaming everywhere else.  This is safe as a global
    # default because adapters without draft support (Discord, Slack, Matrix,
    # …) report supports_draft_streaming() == False and transparently use the
    # edit path — so "auto" never regresses non-Telegram platforms, it only
    # upgrades the chats that can render the smoother native preview.
    transport: str = "auto"
    edit_interval: float = DEFAULT_STREAMING_EDIT_INTERVAL
    buffer_threshold: int = DEFAULT_STREAMING_BUFFER_THRESHOLD
    cursor: str = DEFAULT_STREAMING_CURSOR
    # Ported from openclaw/openclaw#72038.  When >0, the final edit for
    # a long-running streamed response is delivered as a fresh message
    # if the original preview has been visible for at least this many
    # seconds, so the platform's visible timestamp reflects completion
    # time instead of the preview creation time.  Currently applied to
    # Telegram only (other platforms ignore the setting).  Default 0 disables
    # the fresh-message replacement path; set >0 to opt in.
    fresh_final_after_seconds: float = 0.0

    def to_dict(self) -> Dict[str, Any]:
        return {
            "enabled": self.enabled,
            "transport": self.transport,
            "edit_interval": self.edit_interval,
            "buffer_threshold": self.buffer_threshold,
            "cursor": self.cursor,
            "fresh_final_after_seconds": self.fresh_final_after_seconds,
        }

    @classmethod
    def from_dict(cls, data: Dict[str, Any]) -> "StreamingConfig":
        if not isinstance(data, dict) or not data:
            return cls()

        # ``mode`` is an ergonomic alias for the transport that ALSO implies
        # ``enabled``.  A config like ``streaming: {mode: auto}`` reads as
        # "turn streaming on, transport=auto" — matching the natural intent
        # of someone enabling streaming without also spelling out
        # ``enabled: true``.  Without this, ``mode`` was silently ignored and
        # streaming stayed disabled (``enabled`` defaults to False), which is
        # a surprising footgun: the whole reply buffers and sends at once.
        # ``mode: off`` disables streaming; an explicit ``enabled`` key always
        # wins so callers can force either state.
        #
        # ``transport`` alone does NOT imply ``enabled``: ``streaming.enabled``
        # is the documented master switch (see website/docs/user-guide/
        # configuration.md), so a bare ``transport`` only selects HOW to stream
        # once streaming is on. Only the ``mode`` alias flips ``enabled``.
        raw_transport = data.get("transport")
        raw_mode = data.get("mode")
        # Normalize both through the same helper so YAML's bare ``off``/``on``
        # (parsed as bool False/True) become canonical tokens rather than
        # ``"false"``/``"true"``.
        picked = raw_transport if raw_transport is not None else raw_mode
        transport = _normalize_transport_token(picked)

        if "enabled" in data:
            enabled = _coerce_bool(data.get("enabled"), False)
        elif raw_mode is not None:
            # The ``mode`` alias (and only ``mode``) infers enabled:
            # ``off`` disables, anything else enables.
            enabled = _normalize_transport_token(raw_mode) != "off"
        else:
            enabled = False

        return cls(
            enabled=enabled,
            transport=transport,
            edit_interval=_coerce_float(
                data.get("edit_interval"), DEFAULT_STREAMING_EDIT_INTERVAL,
            ),
            buffer_threshold=_coerce_int(
                data.get("buffer_threshold"), DEFAULT_STREAMING_BUFFER_THRESHOLD,
            ),
            cursor=data.get("cursor", DEFAULT_STREAMING_CURSOR),
            fresh_final_after_seconds=_coerce_float(
                data.get("fresh_final_after_seconds"), 0.0
            ),
        )


# -----------------------------------------------------------------------------
# Built-in platform connection checkers
# -----------------------------------------------------------------------------
# Each callable receives a ``PlatformConfig`` and returns ``True`` when the
# platform is sufficiently configured to be considered "connected".  Platforms
# that rely on the generic ``token or api_key`` check (Telegram, Discord,
# Slack, Matrix, Mattermost, HomeAssistant) do not need an entry here.
def _has_usable_api_server_key(key: object) -> bool:
    """True when API_SERVER_KEY is present and strong enough to be usable.

    Mirrors the startup guard in ``gateway/platforms/api_server.py``
    (``has_usable_secret`` with ``min_length=16``) so the platform is only
    enrolled at load time when the adapter would actually agree to start.
    """
    if not key:
        return False
    try:
        from hermes_cli.auth import has_usable_secret
    except ImportError:
        return len(str(key).strip()) >= 16
    return has_usable_secret(key, min_length=16)


_PLATFORM_CONNECTED_CHECKERS: dict[Platform, Callable[[PlatformConfig], bool]] = {
    Platform.WEIXIN: lambda cfg: bool(
        cfg.extra.get("account_id") and (cfg.token or cfg.extra.get("token"))
    ),
    Platform.WHATSAPP_CLOUD: lambda cfg: bool(
        cfg.extra.get("phone_number_id") and cfg.extra.get("access_token")
    ),
    Platform.SIGNAL: lambda cfg: bool(cfg.extra.get("http_url")),
    Platform.API_SERVER: lambda cfg: _has_usable_api_server_key(
        cfg.extra.get("key") if cfg else None
    ),
    Platform.WEBHOOK: lambda cfg: True,
    Platform.MSGRAPH_WEBHOOK: lambda cfg: bool(
        str(cfg.extra.get("client_state") or "").strip()
    ),
    Platform.BLUEBUBBLES: lambda cfg: bool(
        cfg.extra.get("server_url") and cfg.extra.get("password")
    ),
    Platform.QQBOT: lambda cfg: bool(
        cfg.extra.get("app_id") and cfg.extra.get("client_secret")
    ),
    Platform.YUANBAO: lambda cfg: bool(
        cfg.extra.get("app_id") and cfg.extra.get("app_secret")
    ),
    # Relay dials OUT to a connector; it is "connected" once an endpoint URL is
    # configured (extra["relay_url"] or extra["url"]). The capability descriptor
    # is negotiated at handshake time, so the URL is the only config-level
    # signal in the experimental phase. EXPERIMENTAL — may change.
    Platform.RELAY: lambda cfg: bool(
        cfg.extra.get("relay_url") or cfg.extra.get("url")
    ),
}


@dataclass
class GatewayConfig:
    """
    Main gateway configuration.
    
    Manages all platform connections, session policies, and delivery settings.
    """
    # Platform configurations
    platforms: Dict[Platform, PlatformConfig] = field(default_factory=dict)
    
    # Session reset policies by type
    default_reset_policy: SessionResetPolicy = field(default_factory=SessionResetPolicy)
    reset_by_type: Dict[str, SessionResetPolicy] = field(default_factory=dict)
    reset_by_platform: Dict[Platform, SessionResetPolicy] = field(default_factory=dict)
    
    # Reset trigger commands
    reset_triggers: List[str] = field(default_factory=lambda: ["/new", "/reset"])

    # User-defined quick commands (slash commands that bypass the agent loop)
    quick_commands: Dict[str, Any] = field(default_factory=dict)
    
    # Storage paths
    sessions_dir: Path = field(default_factory=lambda: get_hermes_home() / "sessions")

    # Whether to keep writing the legacy sessions.json mirror of the gateway
    # routing index. The primary copy lives in state.db (gateway_routing
    # table, #9006). Default True for backward compatibility with external
    # tooling and downgrade safety; set gateway.write_sessions_json: false in
    # config.yaml to stop producing the file.
    write_sessions_json: bool = True
    
    # Delivery settings
    always_log_local: bool = True  # Always save cron outputs to local files
    # Drop outbound "silence narration" messages (e.g. *(silent)*, 🔇, a bare
    # ".") pre-send. These are model hallucinations emitted when a persona has
    # nothing actionable to say; in bot-to-bot channels they mirror back and
    # forth, burning tokens and crashing models. Substrate-level guard that
    # survives SOUL.md/prompt drift across providers. Opt out with False for
    # raw passthrough.
    filter_silence_narration: bool = True

    # STT settings
    stt_enabled: bool = True  # Whether to auto-transcribe inbound voice messages
    stt_echo_transcripts: bool = True  # Whether to echo raw STT transcripts back to the user

    # Session isolation in shared chats
    group_sessions_per_user: bool = True  # Isolate group/channel sessions per participant when user IDs are available
    thread_sessions_per_user: bool = False  # When False (default), threads are shared across all participants
    max_concurrent_sessions: Optional[int] = None  # Positive int caps simultaneous active chat sessions

    # Multi-profile multiplexing (opt-in; default off preserves one-gateway-per-profile).
    # When True, the default profile's gateway serves inbound messages for every
    # profile on the host: profiles are stamped into session keys and (in later
    # phases) per-profile adapters/credentials are resolved. When False, the
    # gateway behaves exactly as before — single HERMES_HOME, no profile stamping.
    multiplex_profiles: bool = False
    # Optional named-profile allowlist for multiplex mode. None preserves the
    # historical serve-all behavior; [] serves only the default profile.
    multiplex_profile_allowlist: Optional[List[str]] = None

    # Public HTTPS endpoint another gateway may use for scoped RoomLink calls.
    # Disabled by default: setting an API key alone must never expose or
    # advertise a route. HERMES_ROOM_LINK_URL remains the operator override.
    room_link_url: Optional[str] = None

    # Opt-in systemd event-loop watchdog. Zero preserves Type=simple and
    # disables sd_notify at runtime.
    systemd_watchdog_seconds: int = 0

    # In-process event-loop liveness watchdog (#69089). A daemon OS thread
    # probes the gateway loop with call_soon_threadsafe; after consecutive
    # missed probes it dumps all-thread stacks and hard-exits with the
    # service-restart code so the supervisor can revive the process. On by
    # default; set gateway.loop_watchdog: false in config.yaml to disable.
    #
    # Tuning knobs (all seconds unless noted) make the watchdog tolerate
    # *transient, self-recovering* event-loop stalls — e.g. Telegram/Discord
    # reconnect doing synchronous socket I/O during a network blip — so a
    # short block does not force exit code 75 and trigger a restart churn
    # that stalls cron dispatch (recurring fleet incidents on 2026-08-17,
    # kanban t_0f76430f/t_70483f23). A genuine wedge (event loop frozen for
    # the full tolerance window) still escalates to a supervised restart.
    loop_watchdog: bool = True
    # Seconds the watchdog waits between liveness probes.
    loop_watchdog_probe_interval_s: float = DEFAULT_LOOP_WATCHDOG_INTERVAL_S
    # Seconds a single probe may go unprocessed before it counts as a miss.
    loop_watchdog_probe_timeout_s: float = DEFAULT_LOOP_WATCHDOG_TIMEOUT_S
    # Consecutive missed probes allowed before the watchdog hard-exits.
    # Default stays at 3 (~90-120s of sustained loop block): the transient
    # false-positive class (the watchdog's own on-loop heartbeat fsync)
    # is fixed at the root by the off-loop write + two-witness probe, so
    # raising this fleet-wide would only delay genuine-wedge recovery.
    loop_watchdog_max_strikes: int = DEFAULT_LOOP_WATCHDOG_MAX_STRIKES

    # Unauthorized DM policy
    unauthorized_dm_behavior: str = "pair"  # "pair" or "ignore"

    # Streaming configuration
    streaming: StreamingConfig = field(default_factory=StreamingConfig)

    # Session store pruning: drop SessionEntry records older than this many
    # days from the in-memory dict and sessions.json.  Keeps the store from
    # growing unbounded in gateways serving many chats/threads/users over
    # months.  Pruning is invisible to users — if they resume, they get a
    # fresh session exactly as if the reset policy had fired.  0 = disabled.
    session_store_max_age_days: int = 90

    # Profile-based routing: route specific guilds/channels/threads to
    # different profiles. See gateway/profile_routing.py. Each entry is a
    # dict with: name, platform, profile, and optional guild_id/chat_id/thread_id.
    profile_routes: list = field(default_factory=list)

    def __post_init__(self) -> None:
        self.multiplex_profile_allowlist = _normalize_multiplex_profile_allowlist(
            self.multiplex_profile_allowlist
        )
        self.systemd_watchdog_seconds = coerce_systemd_watchdog_seconds(
            self.systemd_watchdog_seconds
        )

    def get_connected_platforms(self) -> List[Platform]:
        """Return list of platforms that are enabled and configured.

        Sorted by platform value so the rendered "Connected Platforms" list
        (and the home-channel blocks derived from it) is byte-stable across
        gateway restarts and mid-process platform registration — dict
        insertion order is not a stable contract and a reorder busts the
        prompt cache without any semantic change.
        """
        connected = []
        for platform, config in self.platforms.items():
            if not config.enabled:
                continue
            if self._is_platform_connected(platform, config):
                connected.append(platform)
        return sorted(connected, key=lambda p: str(p.value))

    def _is_platform_connected(self, platform: Platform, config: PlatformConfig) -> bool:
        """Check whether a single platform is sufficiently configured."""
        # Weixin requires both a token and an account_id (checked first so
        # the generic token branch doesn't let it through without account_id).
        if platform == Platform.WEIXIN:
            return bool(
                config.extra.get("account_id")
                and (config.token or config.extra.get("token"))
            )

        # Generic token/api_key auth covers Telegram, Discord, Slack, etc.
        if config.token or config.api_key:
            return True

        # Platform-specific check
        checker = _PLATFORM_CONNECTED_CHECKERS.get(platform)
        if checker is not None:
            return checker(config)

        # Plugin-registered platforms.  Force plugin discovery first so this
        # works even when GatewayConfig is constructed directly (e.g. in tests
        # or callers that bypass load_gateway_config(), which is what triggers
        # discovery in the normal path).  discover_plugins() is idempotent.
        try:
            from gateway.platform_registry import platform_registry
            try:
                from hermes_cli.plugins import discover_plugins
                discover_plugins()
            except Exception:
                pass
            entry = platform_registry.get(platform.value)
            if entry:
                if entry.is_connected is not None:
                    return entry.is_connected(config)
                if entry.validate_config is not None:
                    return entry.validate_config(config)
                return True
        except Exception:
            pass  # Registry not yet initialised during early import

        return False
    
    def get_home_channel(self, platform: Platform) -> Optional[HomeChannel]:
        """Get the home channel for a platform."""
        config = self.platforms.get(platform)
        if config:
            return config.home_channel
        return None
    
    def get_reset_policy(
        self, 
        platform: Optional[Platform] = None,
        session_type: Optional[str] = None
    ) -> SessionResetPolicy:
        """
        Get the appropriate reset policy for a session.
        
        Priority: platform override > type override > default
        """
        # Platform-specific override takes precedence
        if platform and platform in self.reset_by_platform:
            return self.reset_by_platform[platform]
        
        # Type-specific override (dm, group, thread)
        if session_type and session_type in self.reset_by_type:
            return self.reset_by_type[session_type]
        
        return self.default_reset_policy
    
    def to_dict(self) -> Dict[str, Any]:
        return {
            "platforms": {
                p.value: c.to_dict() for p, c in self.platforms.items()
            },
            "default_reset_policy": self.default_reset_policy.to_dict(),
            "reset_by_type": {
                k: v.to_dict() for k, v in self.reset_by_type.items()
            },
            "reset_by_platform": {
                p.value: v.to_dict() for p, v in self.reset_by_platform.items()
            },
            "reset_triggers": self.reset_triggers,
            "quick_commands": self.quick_commands,
            "sessions_dir": str(self.sessions_dir),
            "write_sessions_json": self.write_sessions_json,
            "always_log_local": self.always_log_local,
            "filter_silence_narration": self.filter_silence_narration,
            "stt_enabled": self.stt_enabled,
            "stt_echo_transcripts": self.stt_echo_transcripts,
            "group_sessions_per_user": self.group_sessions_per_user,
            "thread_sessions_per_user": self.thread_sessions_per_user,
            "max_concurrent_sessions": self.max_concurrent_sessions,
            "multiplex_profiles": self.multiplex_profiles,
            "multiplex_profile_allowlist": self.multiplex_profile_allowlist,
            "room_link_url": self.room_link_url,
            "systemd_watchdog_seconds": self.systemd_watchdog_seconds,
            "loop_watchdog": self.loop_watchdog,
            "loop_watchdog_probe_interval_s": self.loop_watchdog_probe_interval_s,
            "loop_watchdog_probe_timeout_s": self.loop_watchdog_probe_timeout_s,
            "loop_watchdog_max_strikes": self.loop_watchdog_max_strikes,
            "unauthorized_dm_behavior": self.unauthorized_dm_behavior,
            "streaming": self.streaming.to_dict(),
            "session_store_max_age_days": self.session_store_max_age_days,
            "profile_routes": [
                asdict(r) if is_dataclass(r) and not isinstance(r, type) else r
                for r in self.profile_routes
            ],
        }
    
    @classmethod
    def from_dict(cls, data: Dict[str, Any]) -> "GatewayConfig":
        data = _coerce_dict(data)
        platforms = {}
        platforms_data = _coerce_dict(data.get("platforms", {}))
        for platform_name, platform_data in platforms_data.items():
            if not isinstance(platform_data, dict):
                continue
            try:
                platform = Platform(platform_name)
                platforms[platform] = PlatformConfig.from_dict(platform_data)
            except ValueError:
                pass  # Skip unknown platforms
        
        reset_by_type = {}
        for type_name, policy_data in _coerce_dict(data.get("reset_by_type", {})).items():
            reset_by_type[type_name] = SessionResetPolicy.from_dict(policy_data)
        
        reset_by_platform = {}
        for platform_name, policy_data in _coerce_dict(data.get("reset_by_platform", {})).items():
            try:
                platform = Platform(platform_name)
                reset_by_platform[platform] = SessionResetPolicy.from_dict(policy_data)
            except ValueError:
                pass
        
        default_policy = SessionResetPolicy()
        if "default_reset_policy" in data:
            default_policy = SessionResetPolicy.from_dict(data["default_reset_policy"])
        
        sessions_dir = get_hermes_home() / "sessions"
        if "sessions_dir" in data:
            sessions_dir = Path(data["sessions_dir"])
        
        quick_commands = data.get("quick_commands", {})
        if not isinstance(quick_commands, dict):
            quick_commands = {}

        stt_enabled = data.get("stt_enabled")
        if stt_enabled is None:
            stt_enabled = data.get("stt", {}).get("enabled") if isinstance(data.get("stt"), dict) else None
        stt_echo_transcripts = data.get("stt_echo_transcripts")
        if stt_echo_transcripts is None:
            stt_echo_transcripts = (
                data.get("stt", {}).get("echo_transcripts")
                if isinstance(data.get("stt"), dict)
                else None
            )

        group_sessions_per_user = data.get("group_sessions_per_user")
        thread_sessions_per_user = data.get("thread_sessions_per_user")
        multiplex_profiles = data.get("multiplex_profiles")
        raw_gateway = data.get("gateway")
        nested_gateway = raw_gateway if isinstance(raw_gateway, dict) else {}
        if "multiplex_profile_allowlist" in data:
            multiplex_profile_allowlist = data.get("multiplex_profile_allowlist")
        else:
            multiplex_profile_allowlist = nested_gateway.get(
                "multiplex_profile_allowlist"
            )
        room_link_url = data.get("room_link_url")
        if room_link_url is not None and not isinstance(room_link_url, str):
            room_link_url = None
        if "systemd_watchdog_seconds" in data:
            systemd_watchdog_raw = data.get("systemd_watchdog_seconds")
            systemd_watchdog_key = "systemd_watchdog_seconds"
        else:
            systemd_watchdog_raw = nested_gateway.get("systemd_watchdog_seconds")
            systemd_watchdog_key = "gateway.systemd_watchdog_seconds"
        systemd_watchdog_seconds = coerce_systemd_watchdog_seconds(
            systemd_watchdog_raw, systemd_watchdog_key
        )
        if "loop_watchdog" in data:
            loop_watchdog_raw = data.get("loop_watchdog")
        else:
            loop_watchdog_raw = nested_gateway.get("loop_watchdog")
        loop_watchdog = _coerce_bool(loop_watchdog_raw, True)
        loop_watchdog_probe_interval_s = _coerce_float(
            data.get("loop_watchdog_probe_interval_s")
            if "loop_watchdog_probe_interval_s" in data
            else nested_gateway.get("loop_watchdog_probe_interval_s"),
            DEFAULT_LOOP_WATCHDOG_INTERVAL_S,
        )
        loop_watchdog_probe_timeout_s = _coerce_float(
            data.get("loop_watchdog_probe_timeout_s")
            if "loop_watchdog_probe_timeout_s" in data
            else nested_gateway.get("loop_watchdog_probe_timeout_s"),
            DEFAULT_LOOP_WATCHDOG_TIMEOUT_S,
        )
        loop_watchdog_max_strikes = _coerce_int(
            data.get("loop_watchdog_max_strikes")
            if "loop_watchdog_max_strikes" in data
            else nested_gateway.get("loop_watchdog_max_strikes"),
            DEFAULT_LOOP_WATCHDOG_MAX_STRIKES,
        )
        if (
            not math.isfinite(loop_watchdog_probe_interval_s)
            or loop_watchdog_probe_interval_s < 1.0
            or loop_watchdog_probe_interval_s > 3600.0
        ):
            loop_watchdog_probe_interval_s = DEFAULT_LOOP_WATCHDOG_INTERVAL_S
        if (
            not math.isfinite(loop_watchdog_probe_timeout_s)
            or loop_watchdog_probe_timeout_s < 1.0
            or loop_watchdog_probe_timeout_s > 600.0
        ):
            loop_watchdog_probe_timeout_s = DEFAULT_LOOP_WATCHDOG_TIMEOUT_S
        if loop_watchdog_max_strikes < 1 or loop_watchdog_max_strikes > 1000:
            loop_watchdog_max_strikes = DEFAULT_LOOP_WATCHDOG_MAX_STRIKES
        if multiplex_profiles is None and isinstance(nested_gateway, dict):
            # Also honor gateway.multiplex_profiles written by
            # ``hermes config set gateway.multiplex_profiles true``.
            multiplex_profiles = nested_gateway.get("multiplex_profiles")
        # Operator override: GATEWAY_MULTIPLEX_PROFILES wins over config.yaml when
        # set to a recognized value. Hosted deployments (Nous Portal / Fly) stamp
        # it on the container so the single multiplexed gateway — which the
        # connector now depends on for per-profile relay routing — is forced on at
        # every boot regardless of the image's config.yaml, while self-hosted
        # users keep setting gateway.multiplex_profiles in config.yaml. A blank or
        # unrecognized env value falls through to config (the empty-secret trap:
        # a provisioned-but-unpopulated Fly secret must not shadow config), so
        # this is a genuine 3-tier chain: env > config.yaml > default False.
        env_multiplex = _env_multiplex_profiles_override()
        if env_multiplex is not None:
            multiplex_profiles = env_multiplex
        if "max_concurrent_sessions" in data:
            max_concurrent_raw = data.get("max_concurrent_sessions")
            max_concurrent_key = "max_concurrent_sessions"
        else:
            max_concurrent_raw = nested_gateway.get("max_concurrent_sessions")
            max_concurrent_key = "gateway.max_concurrent_sessions"
        max_concurrent_sessions = _coerce_optional_positive_int(
            max_concurrent_raw,
            max_concurrent_key,
        )
        unauthorized_dm_behavior = _normalize_unauthorized_dm_behavior(
            data.get("unauthorized_dm_behavior"),
            "pair",
        )

        try:
            session_store_max_age_days = int(data.get("session_store_max_age_days", 90))
            session_store_max_age_days = max(session_store_max_age_days, 0)
        except (TypeError, ValueError):
            session_store_max_age_days = 90

        # Parse profile routes (validated by gateway.profile_routing)
        from gateway.profile_routing import parse_profile_routes
        profile_routes = parse_profile_routes(data.get("profile_routes") or [])

        return cls(
            platforms=platforms,
            default_reset_policy=default_policy,
            reset_by_type=reset_by_type,
            reset_by_platform=reset_by_platform,
            reset_triggers=data.get("reset_triggers", ["/new", "/reset"]),
            quick_commands=quick_commands,
            sessions_dir=sessions_dir,
            write_sessions_json=_coerce_bool(data.get("write_sessions_json"), True),
            always_log_local=_coerce_bool(data.get("always_log_local"), True),
            filter_silence_narration=_coerce_bool(
                data.get("filter_silence_narration"), True
            ),
            stt_enabled=_coerce_bool(stt_enabled, True),
            stt_echo_transcripts=_coerce_bool(stt_echo_transcripts, True),
            group_sessions_per_user=_coerce_bool(group_sessions_per_user, True),
            thread_sessions_per_user=_coerce_bool(thread_sessions_per_user, False),
            multiplex_profiles=_coerce_bool(multiplex_profiles, False),
            multiplex_profile_allowlist=multiplex_profile_allowlist,
            room_link_url=room_link_url,
            systemd_watchdog_seconds=systemd_watchdog_seconds,
            loop_watchdog=loop_watchdog,
            loop_watchdog_probe_interval_s=loop_watchdog_probe_interval_s,
            loop_watchdog_probe_timeout_s=loop_watchdog_probe_timeout_s,
            loop_watchdog_max_strikes=loop_watchdog_max_strikes,
            max_concurrent_sessions=max_concurrent_sessions,
            unauthorized_dm_behavior=unauthorized_dm_behavior,
            streaming=StreamingConfig.from_dict(data.get("streaming", {})),
            session_store_max_age_days=session_store_max_age_days,
            profile_routes=profile_routes,
        )

    def get_unauthorized_dm_behavior(self, platform: Optional[Platform] = None) -> str:
        """Return the effective unauthorized-DM behavior for a platform.

        Email is inbox-shaped, not chat-shaped, so it defaults to ``"ignore"``
        unless ``platforms.email.unauthorized_dm_behavior`` explicitly opts
        into pairing. A global default does not opt email into pairing.
        """
        if platform:
            platform_cfg = self.platforms.get(platform)
            if platform_cfg and "unauthorized_dm_behavior" in platform_cfg.extra:
                return _normalize_unauthorized_dm_behavior(
                    platform_cfg.extra.get("unauthorized_dm_behavior"),
                    self.unauthorized_dm_behavior,
                )
            if platform == Platform.EMAIL:
                return "ignore"
        return self.unauthorized_dm_behavior

    def get_notice_delivery(self, platform: Optional[Platform] = None) -> str:
        """Return the effective notice-delivery mode for a platform."""
        if platform:
            platform_cfg = self.platforms.get(platform)
            if platform_cfg and "notice_delivery" in platform_cfg.extra:
                return _normalize_notice_delivery(
                    platform_cfg.extra.get("notice_delivery"),
                    "public",
                )
        return "public"


def load_gateway_config() -> GatewayConfig:
    """
    Load gateway configuration from multiple sources.

    Priority (highest to lowest):
    1. Environment variables
    2. ~/.hermes/config.yaml (primary user-facing config)
    3. ~/.hermes/gateway.json (legacy — provides defaults under config.yaml)
    4. Built-in defaults
    """
    _home = get_hermes_home()
    gw_data: dict = {}

    # Legacy fallback: gateway.json provides the base layer.
    # config.yaml keys always win when both specify the same setting.
    gateway_json_path = _home / "gateway.json"
    if gateway_json_path.exists():
        try:
            with open(gateway_json_path, "r", encoding="utf-8") as f:
                gw_data = json.load(f) or {}
            logger.info(
                "Loaded legacy %s — consider moving settings to config.yaml",
                gateway_json_path,
            )
        except Exception as e:
            logger.warning("Failed to load %s: %s", gateway_json_path, e)

    # Primary source: config.yaml
    try:
        import yaml
        config_yaml_path = _home / "config.yaml"
        if config_yaml_path.exists():
            with open(config_yaml_path, encoding="utf-8") as f:
                yaml_cfg = yaml.safe_load(f) or {}

            # Managed scope: overlay administrator-pinned values so the gateway
            # honors them too. This loader builds its own dict instead of going
            # through hermes_cli.config.load_config, so without this a managed
            # session_reset / quick_commands / stt / model would be ignored by
            # the messaging gateway. Fail-open via the shared helper.
            from hermes_cli import managed_scope
            yaml_cfg = managed_scope.apply_managed_overlay(yaml_cfg)

            # Shared nested-fallback source: settings meant to be top-level
            # keys are also accepted when a user nests them under `gateway:`
            # (e.g. via `hermes config set gateway.<key> ...`, which naturally
            # produces that shape). Every key below mirrors the precedent
            # already established for gateway.multiplex_profiles/streaming/
            # write_sessions_json: top-level wins, nested gateway.* falls back.
            gateway_section = yaml_cfg.get("gateway")

            # Map config.yaml keys → GatewayConfig.from_dict() schema.
            # Each key overwrites whatever gateway.json may have set.
            # Precedence contract: key-presence at the TOP LEVEL wins; the
            # nested gateway.* form is consulted only when the top-level key
            # is absent (not merely falsy/mistyped), so a present-but-empty
            # top-level value is never silently replaced by the nested one.
            sr = yaml_cfg.get("session_reset")
            if "session_reset" not in yaml_cfg and isinstance(gateway_section, dict):
                sr = gateway_section.get("session_reset")
            if sr and isinstance(sr, dict):
                gw_data["default_reset_policy"] = sr

            qc = yaml_cfg.get("quick_commands")
            if qc is None and isinstance(gateway_section, dict):
                qc = gateway_section.get("quick_commands")
            if qc is not None:
                if isinstance(qc, dict):
                    gw_data["quick_commands"] = qc
                else:
                    logger.warning(
                        "Ignoring invalid quick_commands in config.yaml "
                        "(expected mapping, got %s)",
                        type(qc).__name__,
                    )

            stt_cfg = yaml_cfg.get("stt")
            if "stt" not in yaml_cfg and isinstance(gateway_section, dict):
                stt_cfg = gateway_section.get("stt")
            if isinstance(stt_cfg, dict):
                gw_data["stt"] = stt_cfg
            if "stt_echo_transcripts" in yaml_cfg:
                gw_data["stt_echo_transcripts"] = yaml_cfg["stt_echo_transcripts"]
            elif isinstance(gateway_section, dict) and "stt_echo_transcripts" in gateway_section:
                gw_data["stt_echo_transcripts"] = gateway_section["stt_echo_transcripts"]

            gateway_cfg = yaml_cfg.get("gateway")

            if "group_sessions_per_user" in yaml_cfg:
                gw_data["group_sessions_per_user"] = yaml_cfg["group_sessions_per_user"]
            elif isinstance(gateway_section, dict) and "group_sessions_per_user" in gateway_section:
                gw_data["group_sessions_per_user"] = gateway_section["group_sessions_per_user"]

            if "thread_sessions_per_user" in yaml_cfg:
                gw_data["thread_sessions_per_user"] = yaml_cfg["thread_sessions_per_user"]
            elif isinstance(gateway_section, dict) and "thread_sessions_per_user" in gateway_section:
                gw_data["thread_sessions_per_user"] = gateway_section["thread_sessions_per_user"]

            # Multiplexing flag: accept both the top-level key and the nested
            # gateway.multiplex_profiles form (written by
            # ``hermes config set gateway.multiplex_profiles true``).
            if "multiplex_profiles" in yaml_cfg:
                gw_data["multiplex_profiles"] = yaml_cfg["multiplex_profiles"]

            if "multiplex_profile_allowlist" in yaml_cfg:
                gw_data["multiplex_profile_allowlist"] = yaml_cfg[
                    "multiplex_profile_allowlist"
                ]
            elif (
                isinstance(gateway_section, dict)
                and "multiplex_profile_allowlist" in gateway_section
            ):
                gw_data["multiplex_profile_allowlist"] = gateway_section[
                    "multiplex_profile_allowlist"
                ]

            if "room_link_url" in yaml_cfg:
                gw_data["room_link_url"] = yaml_cfg["room_link_url"]
            elif isinstance(gateway_section, dict) and "room_link_url" in gateway_section:
                gw_data["room_link_url"] = gateway_section["room_link_url"]

            # Profile-based routing rules: accept either top-level
            # ``profile_routes`` or the nested ``gateway.profile_routes`` form
            # (matching the multiplex_profiles parity above).
            _pr = yaml_cfg.get("profile_routes")
            if _pr is None and isinstance(gateway_section, dict):
                _pr = gateway_section.get("profile_routes")
            if isinstance(_pr, list):
                gw_data["profile_routes"] = _pr

            if isinstance(gateway_section, dict):
                if "multiplex_profiles" in gateway_section and "multiplex_profiles" not in gw_data:
                    # gateway.multiplex_profiles written by `hermes config set gateway.multiplex_profiles true`
                    gw_data["multiplex_profiles"] = gateway_section["multiplex_profiles"]
                if "max_concurrent_sessions" in gateway_section:
                    gw_data["max_concurrent_sessions"] = gateway_section["max_concurrent_sessions"]
                if "systemd_watchdog_seconds" in gateway_section:
                    gw_data["systemd_watchdog_seconds"] = gateway_section[
                        "systemd_watchdog_seconds"
                    ]

            if "max_concurrent_sessions" in yaml_cfg:
                gw_data["max_concurrent_sessions"] = yaml_cfg["max_concurrent_sessions"]

            streaming_cfg = yaml_cfg.get("streaming")
            if not isinstance(streaming_cfg, dict) and isinstance(gateway_section, dict):
                # Fall back to nested gateway.streaming written by
                # ``hermes config set gateway.streaming.*``
                streaming_cfg = gateway_section.get("streaming")
            if isinstance(streaming_cfg, dict):
                gw_data["streaming"] = streaming_cfg

            if "reset_triggers" in yaml_cfg:
                gw_data["reset_triggers"] = yaml_cfg["reset_triggers"]
            elif isinstance(gateway_section, dict) and "reset_triggers" in gateway_section:
                gw_data["reset_triggers"] = gateway_section["reset_triggers"]

            if "always_log_local" in yaml_cfg:
                gw_data["always_log_local"] = yaml_cfg["always_log_local"]
            elif isinstance(gateway_section, dict) and "always_log_local" in gateway_section:
                gw_data["always_log_local"] = gateway_section["always_log_local"]

            # write_sessions_json: top-level wins; nested gateway.* fallback
            # (matches the gateway.streaming precedence pattern).
            if "write_sessions_json" in yaml_cfg:
                gw_data["write_sessions_json"] = yaml_cfg["write_sessions_json"]
            elif isinstance(gateway_section, dict) and "write_sessions_json" in gateway_section:
                gw_data["write_sessions_json"] = gateway_section["write_sessions_json"]

            # Loop-liveness watchdog toggle + tuning knobs: top-level wins;
            # nested gateway.* fallback. GatewayConfig.from_dict has its own
            # nested fallback, but this loader builds gw_data FLAT and never
            # forwards the yaml `gateway:` section — without this bridge the
            # documented keys (including the pre-existing loop_watchdog bool)
            # were silently ignored on the real gateway startup path.
            for _wd_key in (
                "loop_watchdog",
                "loop_watchdog_probe_interval_s",
                "loop_watchdog_probe_timeout_s",
                "loop_watchdog_max_strikes",
            ):
                if _wd_key in yaml_cfg:
                    gw_data[_wd_key] = yaml_cfg[_wd_key]
                elif isinstance(gateway_section, dict) and _wd_key in gateway_section:
                    gw_data[_wd_key] = gateway_section[_wd_key]

            if "filter_silence_narration" in yaml_cfg:
                gw_data["filter_silence_narration"] = yaml_cfg[
                    "filter_silence_narration"
                ]
            elif isinstance(gateway_section, dict) and "filter_silence_narration" in gateway_section:
                gw_data["filter_silence_narration"] = gateway_section[
                    "filter_silence_narration"
                ]

            if "unauthorized_dm_behavior" in yaml_cfg:
                gw_data["unauthorized_dm_behavior"] = _normalize_unauthorized_dm_behavior(
                    yaml_cfg.get("unauthorized_dm_behavior"),
                    "pair",
                )
            elif isinstance(gateway_section, dict) and "unauthorized_dm_behavior" in gateway_section:
                gw_data["unauthorized_dm_behavior"] = _normalize_unauthorized_dm_behavior(
                    gateway_section.get("unauthorized_dm_behavior"),
                    "pair",
                )

            # Merge platform config into gw_data so runtime-only settings under
            # ``gateway.platforms`` are loaded the same way as top-level
            # ``platforms``. Merge nested first so top-level config keeps
            # precedence, matching the existing gateway.streaming fallback.
            gateway_platforms = gateway_cfg.get("platforms") if isinstance(gateway_cfg, dict) else None
            platforms_data = gw_data.setdefault("platforms", {})
            if not isinstance(platforms_data, dict):
                platforms_data = {}
                gw_data["platforms"] = platforms_data

            def _merge_platform_map(source_platforms: Any) -> None:
                if not isinstance(source_platforms, dict):
                    return
                for plat_name, plat_block in source_platforms.items():
                    if not isinstance(plat_block, dict):
                        continue
                    existing = platforms_data.get(plat_name, {})
                    if not isinstance(existing, dict):
                        existing = {}
                    # Deep-merge extra dicts so gateway.json defaults survive
                    merged_extra = {**existing.get("extra", {}), **plat_block.get("extra", {})}
                    if "enabled" in plat_block:
                        merged_extra["_enabled_explicit"] = True
                    merged = {**existing, **plat_block}
                    if merged_extra:
                        merged["extra"] = merged_extra
                    platforms_data[plat_name] = merged

            _merge_platform_map(gateway_platforms)
            _merge_platform_map(yaml_cfg.get("platforms"))

            # Also merge platform configs placed directly under ``gateway.*``
            # (e.g. ``gateway.api_server``) so subsections are discovered the
            # same way ``gateway.streaming`` is handled elsewhere.  Iterate
            # all ``gateway:*`` keys and merge only those that match a known
            # platform value, skipping reserved keys like ``platforms``.
            if isinstance(gateway_cfg, dict):
                _nested_platforms: dict = {}
                for _k, _v in gateway_cfg.items():
                    if _k == "platforms":
                        continue
                    try:
                        Platform(_k)
                    except (ValueError, AttributeError):
                        continue
                    if isinstance(_v, dict):
                        _nested_platforms[_k] = _v
                if _nested_platforms:
                    _merge_platform_map(_nested_platforms)

            # Bridge api_server-specific keys (port, key, host, cors_origins,
            # model_name) into extra so PlatformConfig.from_dict preserves
            # them — adapting what _apply_env_overrides does for env vars to
            # the YAML path.  Users writing ``gateway.api_server.port: 8642``
            # expect these to end up in the platform's extra dict.
            _api_plat = platforms_data.get("api_server")
            if isinstance(_api_plat, dict):
                _api_extra = _api_plat.get("extra")
                if not isinstance(_api_extra, dict):
                    _api_extra = {}
                    _api_plat["extra"] = _api_extra
                for _bridge_key in ("port", "key", "host", "cors_origins", "model_name"):
                    if _bridge_key in _api_plat and _bridge_key not in _api_extra:
                        _api_extra[_bridge_key] = _api_plat.pop(_bridge_key)

            if platforms_data:
                gw_data["platforms"] = platforms_data
            # Iterate built-in platforms plus any registered plugin platforms
            # so plugin authors get the same shared-key bridging (#24836).
            try:
                from hermes_cli.plugins import discover_plugins
                discover_plugins()  # idempotent
                from gateway.platform_registry import platform_registry as _pr
            except Exception as e:
                logger.debug("plugin discovery skipped: %s", e)
                _pr = None

            _shared_loop_targets: list = list(Platform)
            if _pr is not None:
                for _entry in _pr.plugin_entries():
                    try:
                        _plat = Platform(_entry.name)
                    except (ValueError, KeyError):
                        continue
                    if _plat not in _shared_loop_targets:
                        _shared_loop_targets.append(_plat)

            for plat in _shared_loop_targets:
                if plat == Platform.LOCAL:
                    continue
                platform_cfg = yaml_cfg.get(plat.value)
                _cfg_toplevel = isinstance(platform_cfg, dict)
                # Fall back to the platform's block under ``platforms`` /
                # ``gateway.platforms`` so shared-key bridging (allow_from,
                # require_mention, free_response_channels, …) still runs when
                # the user configured the platform only under those nested paths
                # and not via a top-level block.  Mirrors the identical fallback
                # already applied to the apply_yaml_config_fn dispatch below
                # (#44f3e51).
                # Note: ``enabled`` is only written to plat_data from a
                # top-level block (``_cfg_toplevel``); for nested-only configs
                # ``_merge_platform_map`` already merged it with the correct
                # precedence, so re-applying it here would overwrite that.
                if not _cfg_toplevel:
                    for _src in (gateway_platforms, yaml_cfg.get("platforms")):
                        if isinstance(_src, dict):
                            _candidate = _src.get(plat.value)
                            if isinstance(_candidate, dict):
                                platform_cfg = _candidate
                                break
                if not isinstance(platform_cfg, dict):
                    continue
                # Collect bridgeable keys from this platform section
                bridged = {}
                if "unauthorized_dm_behavior" in platform_cfg:
                    bridged["unauthorized_dm_behavior"] = _normalize_unauthorized_dm_behavior(
                        platform_cfg.get("unauthorized_dm_behavior"),
                        gw_data.get("unauthorized_dm_behavior", "pair"),
                    )
                if "notice_delivery" in platform_cfg:
                    bridged["notice_delivery"] = _normalize_notice_delivery(
                        platform_cfg.get("notice_delivery"),
                        "public",
                    )
                if "reply_prefix" in platform_cfg:
                    bridged["reply_prefix"] = platform_cfg["reply_prefix"]
                if "reply_in_thread" in platform_cfg:
                    bridged["reply_in_thread"] = platform_cfg["reply_in_thread"]
                if "cron_continuable_surface" in platform_cfg:
                    bridged["cron_continuable_surface"] = platform_cfg["cron_continuable_surface"]
                if "require_mention" in platform_cfg:
                    bridged["require_mention"] = platform_cfg["require_mention"]
                if "send_read_receipts" in platform_cfg:
                    bridged["send_read_receipts"] = platform_cfg["send_read_receipts"]
                if plat == Platform.TELEGRAM and "allowed_chats" in platform_cfg:
                    bridged["allowed_chats"] = platform_cfg["allowed_chats"]
                if plat == Platform.TELEGRAM and "group_allowed_chats" in platform_cfg:
                    bridged["group_allowed_chats"] = platform_cfg["group_allowed_chats"]
                if plat == Platform.TELEGRAM and "allowed_topics" in platform_cfg:
                    bridged["allowed_topics"] = platform_cfg["allowed_topics"]
                if "free_response_channels" in platform_cfg:
                    bridged["free_response_channels"] = platform_cfg["free_response_channels"]
                if "mention_patterns" in platform_cfg:
                    bridged["mention_patterns"] = platform_cfg["mention_patterns"]
                if "exclusive_bot_mentions" in platform_cfg:
                    bridged["exclusive_bot_mentions"] = platform_cfg["exclusive_bot_mentions"]
                if plat == Platform.TELEGRAM and "observe_unmentioned_group_messages" in platform_cfg:
                    bridged["observe_unmentioned_group_messages"] = platform_cfg["observe_unmentioned_group_messages"]
                if "dm_policy" in platform_cfg:
                    bridged["dm_policy"] = platform_cfg["dm_policy"]
                if "allow_from" in platform_cfg:
                    bridged["allow_from"] = platform_cfg["allow_from"]
                if "allow_admin_from" in platform_cfg:
                    bridged["allow_admin_from"] = platform_cfg["allow_admin_from"]
                if "user_allowed_commands" in platform_cfg:
                    bridged["user_allowed_commands"] = platform_cfg["user_allowed_commands"]
                if "group_policy" in platform_cfg:
                    bridged["group_policy"] = platform_cfg["group_policy"]
                if "group_allow_from" in platform_cfg:
                    bridged["group_allow_from"] = platform_cfg["group_allow_from"]
                if "group_allow_admin_from" in platform_cfg:
                    bridged["group_allow_admin_from"] = platform_cfg["group_allow_admin_from"]
                if "group_user_allowed_commands" in platform_cfg:
                    bridged["group_user_allowed_commands"] = platform_cfg["group_user_allowed_commands"]
                if plat in {Platform.DISCORD, Platform.SLACK} and "channel_skill_bindings" in platform_cfg:
                    bridged["channel_skill_bindings"] = platform_cfg["channel_skill_bindings"]
                if "channel_prompts" in platform_cfg:
                    channel_prompts = platform_cfg["channel_prompts"]
                    if isinstance(channel_prompts, dict):
                        bridged["channel_prompts"] = {str(k): v for k, v in channel_prompts.items()}
                    else:
                        bridged["channel_prompts"] = channel_prompts
                if "gateway_restart_notification" in platform_cfg:
                    bridged["gateway_restart_notification"] = platform_cfg["gateway_restart_notification"]
                if "typing_indicator" in platform_cfg:
                    bridged["typing_indicator"] = platform_cfg["typing_indicator"]
                if "typing_status_text" in platform_cfg:
                    bridged["typing_status_text"] = platform_cfg["typing_status_text"]
                # Bridge top-level port/host/secret into extra for platforms
                # whose adapters read these from config.extra (webhook,
                # msgraph_webhook, api_server).  Without this, YAML like:
                #   platforms:
                #     webhook:
                #       enabled: true
                #       port: 8649
                # silently falls back to the hardcoded DEFAULT_PORT because
                # PlatformConfig.from_dict only extracts ``extra`` from the
                # ``extra:`` sub-key, not from the top level.
                if plat in {Platform.WEBHOOK, Platform.MSGRAPH_WEBHOOK}:
                    for _bridge_key in ("port", "host", "secret"):
                        if _bridge_key in platform_cfg and _bridge_key not in platform_cfg.get("extra", {}):
                            bridged[_bridge_key] = platform_cfg[_bridge_key]
                if plat == Platform.API_SERVER:
                    for _bridge_key in ("port", "host"):
                        if _bridge_key in platform_cfg and _bridge_key not in platform_cfg.get("extra", {}):
                            bridged[_bridge_key] = platform_cfg[_bridge_key]
                has_channel_overrides = "channel_overrides" in platform_cfg
                if has_channel_overrides:
                    raw_overrides = platform_cfg.get("channel_overrides")
                    if isinstance(raw_overrides, dict):
                        plat_data, _extra = _ensure_platform_extra_dict(
                            platforms_data, plat.value
                        )
                        plat_data["channel_overrides"] = {
                            str(cid): ov_data
                            for cid, ov_data in raw_overrides.items()
                            if isinstance(ov_data, dict)
                        }
                enabled_was_explicit = _cfg_toplevel and "enabled" in platform_cfg
                if not bridged and not enabled_was_explicit and not has_channel_overrides:
                    continue
                plat_data, extra = _ensure_platform_extra_dict(platforms_data, plat.value)
                if enabled_was_explicit:
                    plat_data["enabled"] = platform_cfg["enabled"]
                    # Mark the explicit enable/disable so the registry-driven
                    # plugin-enable pass in _apply_env_overrides honors an
                    # explicit ``enabled: false`` for migrated plugin platforms
                    # (slack, telegram, matrix, dingtalk, whatsapp, feishu …)
                    # instead of re-enabling them on token/SDK presence. #41112.
                    extra["_enabled_explicit"] = True
                extra.update(bridged)

            # Plugin-owned YAML→env config bridges (#24836).  See
            # ``PlatformEntry.apply_yaml_config_fn`` for the hook contract.
            # Order: shared-key loop (above) → this dispatch → legacy hardcoded
            # blocks (below; no-op when a hook already set their env var) →
            # ``_apply_env_overrides()`` after ``GatewayConfig.from_dict``.
            if _pr is not None:
                for entry in _pr.all_entries():
                    if entry.apply_yaml_config_fn is None:
                        continue
                    platform_cfg = yaml_cfg.get(entry.name)
                    # Fall back to the platform's block under ``platforms`` /
                    # ``gateway.platforms`` so adapter hooks still run when the
                    # user configured the platform only under those nested paths
                    # (e.g. ``platforms.discord.extra.allow_from``) and not via a
                    # top-level ``discord:`` block.
                    if not isinstance(platform_cfg, dict):
                        for _src in (gateway_platforms, yaml_cfg.get("platforms")):
                            if isinstance(_src, dict):
                                _candidate = _src.get(entry.name)
                                if isinstance(_candidate, dict):
                                    platform_cfg = _candidate
                                    break
                    if not isinstance(platform_cfg, dict):
                        continue
                    try:
                        seeded = entry.apply_yaml_config_fn(yaml_cfg, platform_cfg)
                    except Exception as e:
                        logger.debug(
                            "apply_yaml_config_fn for %s raised: %s",
                            entry.name, e,
                        )
                        continue
                    if not isinstance(seeded, dict) or not seeded:
                        continue
                    _, extra = _ensure_platform_extra_dict(platforms_data, entry.name)
                    extra.update(seeded)

            # Slack settings → env vars: migrated to the slack plugin's
            # ``apply_yaml_config_fn`` hook (see plugins/platforms/slack/
            # adapter.py::_apply_yaml_config), dispatched in the
            # ``apply_yaml_config_fn`` loop above. #41112 / #3823.

            # Bridge top-level require_mention to Telegram when the telegram: section
            # does not already provide one.  Users often write "require_mention: true"
            # at the top level alongside group_sessions_per_user, expecting it to work
            # the same way (#3979).
            _tl_require_mention = yaml_cfg.get("require_mention")
            if _tl_require_mention is not None:
                _tg_section = yaml_cfg.get("telegram") or {}
                if "require_mention" not in _tg_section:
                    _tg_plat = platforms_data.setdefault(Platform.TELEGRAM.value, {})
                    _tg_extra = _tg_plat.setdefault("extra", {})
                    _tg_extra.setdefault("require_mention", _tl_require_mention)
                    # Also bridge to the TELEGRAM_REQUIRE_MENTION env var that the
                    # adapter reads at runtime.  This used to live in the telegram_cfg
                    # block in core; it stays in core because it keys off the TOP-LEVEL
                    # require_mention (not a telegram: block), so the telegram plugin's
                    # apply_yaml_config_fn hook — which only runs when a telegram config
                    # block exists — can't cover the no-telegram-block case (#3979).
                    if not os.getenv("TELEGRAM_REQUIRE_MENTION"):
                        os.environ["TELEGRAM_REQUIRE_MENTION"] = str(_tl_require_mention).lower()

            # Telegram settings → env vars / extra: migrated to the telegram
            # plugin's apply_yaml_config_fn hook
            # (plugins/platforms/telegram/adapter.py). #41112 / #3823.

            # WhatsApp settings → env vars: migrated to the whatsapp plugin's
            # apply_yaml_config_fn hook (plugins/platforms/whatsapp/adapter.py).
            # #41112 / #3823.

            # Signal settings → env vars (env vars take precedence)
            signal_cfg = yaml_cfg.get("signal", {})
            if isinstance(signal_cfg, dict):
                if "require_mention" in signal_cfg and not os.getenv("SIGNAL_REQUIRE_MENTION"):
                    os.environ["SIGNAL_REQUIRE_MENTION"] = str(signal_cfg["require_mention"]).lower()

            # DingTalk settings → env vars: migrated to the dingtalk plugin's
            # apply_yaml_config_fn hook (plugins/platforms/dingtalk/adapter.py).
            # #41112 / #3823.

            # Mattermost config bridge moved into plugins/platforms/mattermost/
            # adapter.py::_apply_yaml_config — see #25443 (apply_yaml_config_fn).

            # Matrix settings → env vars: migrated to the matrix plugin's
            # apply_yaml_config_fn hook (plugins/platforms/matrix/adapter.py).
            # #41112 / #3823.

            # Feishu settings → env vars: migrated to the feishu plugin's
            # apply_yaml_config_fn hook (plugins/platforms/feishu/adapter.py).
            # #41112 / #3823.

    except Exception as e:
        logger.warning(
            "Failed to process config.yaml — falling back to .env / gateway.json values. "
            "Check %s for syntax errors. Error: %s",
            _home / "config.yaml",
            e,
        )

    config = GatewayConfig.from_dict(gw_data)

    # Override with environment variables
    _apply_env_overrides(config)
    
    # --- Validate loaded values ---
    _validate_gateway_config(config)

    return config


def _validate_gateway_config(config: "GatewayConfig") -> None:
    """Validate and sanitize a loaded GatewayConfig in place.

    Called by ``load_gateway_config()`` after all config sources are merged.
    Extracted as a separate function for testability.
    """
    policy = config.default_reset_policy

    if not (0 <= policy.at_hour <= 23):
        logger.warning(
            "Invalid at_hour=%s (must be 0-23). Using default 4.", policy.at_hour
        )
        policy.at_hour = 4

    if policy.idle_minutes is None or policy.idle_minutes <= 0:
        logger.warning(
            "Invalid idle_minutes=%s (must be positive). Using default 1440.",
            policy.idle_minutes,
        )
        policy.idle_minutes = 1440

    # Warn about empty bot tokens — platforms that loaded an empty string
    # won't connect and the cause can be confusing without a log line.
    _token_env_names = PLATFORM_TOKEN_ENV_NAMES
    for platform, pconfig in config.platforms.items():
        if not pconfig.enabled:
            continue
        env_name = _token_env_names.get(platform)
        if env_name and pconfig.token is not None and not pconfig.token.strip():
            logger.warning(
                "%s is enabled but %s is empty. "
                "The adapter will likely fail to connect.",
                platform.value, env_name,
            )

    # Reject known-weak placeholder tokens.
    # Ported from openclaw/openclaw#64586: users who copy .env.example
    # without changing placeholder values get a clear startup error instead
    # of a confusing "auth failed" from the platform API.
    try:
        from hermes_cli.auth import has_usable_secret
    except ImportError:
        has_usable_secret = None  # type: ignore[assignment]

    if has_usable_secret is not None:
        for platform, pconfig in config.platforms.items():
            if not pconfig.enabled:
                continue
            env_name = _token_env_names.get(platform)
            if not env_name:
                continue
            token = pconfig.token
            if token and token.strip() and not has_usable_secret(token, min_length=4):
                logger.error(
                    "%s is enabled but %s is set to a placeholder value ('%s'). "
                    "Set a real bot token before starting the gateway. "
                    "The adapter will NOT be started.",
                    platform.value, env_name, token.strip()[:6] + "...",
                )
                pconfig.enabled = False


# Platforms for which the "explicitly disabled in config.yaml, but credentials
# are present in the environment" WARNING has already been emitted in this
# process. The gateway reloads its config on every turn (and other surfaces
# call load_gateway_config() repeatedly), so the notice is one-time per
# platform per process — loud once at startup, never a per-turn drumbeat.
_EXPLICIT_DISABLE_WARNED: set = set()


# Env var(s) whose presence drives each platform's env-enable branch, for the
# explicit-disable WARNING below. Kept next to the branches that read them.
_ENV_ENABLE_CREDENTIALS: dict = {
    Platform.TELEGRAM: ("TELEGRAM_BOT_TOKEN",),
    Platform.DISCORD: ("DISCORD_BOT_TOKEN",),
    Platform.SLACK: ("SLACK_BOT_TOKEN",),
    Platform.WHATSAPP_CLOUD: ("WHATSAPP_CLOUD_PHONE_NUMBER_ID", "WHATSAPP_CLOUD_ACCESS_TOKEN"),
    Platform.SIGNAL: ("SIGNAL_HTTP_URL",),
    Platform.MATTERMOST: ("MATTERMOST_TOKEN",),
    Platform.MATRIX: ("MATRIX_ACCESS_TOKEN", "MATRIX_PASSWORD"),
    Platform.HOMEASSISTANT: ("HASS_TOKEN",),
    Platform.EMAIL: ("EMAIL_ADDRESS", "EMAIL_PASSWORD", "EMAIL_IMAP_HOST", "EMAIL_SMTP_HOST"),
    Platform.SMS: ("TWILIO_ACCOUNT_SID",),
    Platform.DINGTALK: ("DINGTALK_CLIENT_ID", "DINGTALK_CLIENT_SECRET"),
    Platform.FEISHU: ("FEISHU_APP_ID", "FEISHU_APP_SECRET"),
    Platform.WECOM: ("WECOM_BOT_ID", "WECOM_SECRET"),
    Platform.WECOM_CALLBACK: ("WECOM_CALLBACK_CORP_ID", "WECOM_CALLBACK_CORP_SECRET"),
    Platform.WEIXIN: ("WEIXIN_TOKEN", "WEIXIN_ACCOUNT_ID"),
    Platform.BLUEBUBBLES: ("BLUEBUBBLES_SERVER_URL", "BLUEBUBBLES_PASSWORD"),
    Platform.QQBOT: ("QQ_APP_ID", "QQ_CLIENT_SECRET"),
    Platform.YUANBAO: ("YUANBAO_APP_ID", "YUANBAO_APP_SECRET"),
    Platform.RELAY: ("GATEWAY_RELAY_URL",),
}


def _warn_explicit_disable_beats_env(platform: Platform) -> None:
    """One-time WARNING: ``platforms.<x>.enabled: false`` wins over env creds.

    Until #48820 the credential-presence branches force-enabled twelve
    platforms regardless of an explicit ``enabled: false`` in config.yaml, so
    users who relied on "creds in .env = platform on" would see it go dark
    after the fix with no explanation. Name the platform, the config key that
    is winning, and the env var(s) that used to override it.
    """
    if platform in _EXPLICIT_DISABLE_WARNED:
        return
    _EXPLICIT_DISABLE_WARNED.add(platform)
    names = _ENV_ENABLE_CREDENTIALS.get(platform) or ()
    present = [n for n in names if (os.environ.get(n) or "").strip()]
    creds = ", ".join(present or names) or "its credentials"
    logger.warning(
        "Platform '%s' is explicitly disabled by platforms.%s.enabled: false in "
        "config.yaml, so the credentials found in the environment (%s) will NOT "
        "start its adapter. Environment credentials no longer override an "
        "explicit disable. Remove the key or set platforms.%s.enabled: true to "
        "turn it back on.",
        platform.value, platform.value, creds, platform.value,
    )


def _apply_env_overrides(config: GatewayConfig) -> None:
    """Apply environment variable overrides to config."""
    getenv = _getenv_str
    getenv_int = _getenv_int

    def _enable_from_env(platform: Platform) -> PlatformConfig:
        if platform not in config.platforms:
            config.platforms[platform] = PlatformConfig(enabled=True)
            return config.platforms[platform]

        platform_config = config.platforms[platform]
        # Read (don't pop) the explicit-enable marker: the registry-driven
        # plugin-enable pass later in this function also needs it to avoid
        # re-enabling a platform the user explicitly disabled (migrated plugin
        # platforms — telegram, matrix — flow through here too, #41112). The
        # flag is cleared once for all platforms in the final cleanup at the
        # end of _apply_env_overrides.
        enabled_was_explicit = bool(platform_config.extra.get("_enabled_explicit", False))
        if not platform_config.enabled:
            if enabled_was_explicit:
                # Credentials are present (that is why we are here) but the
                # user said no in config.yaml. Say so once (#48820).
                _warn_explicit_disable_beats_env(platform)
            else:
                platform_config.enabled = True
        return platform_config
    
    # Telegram
    telegram_token = getenv("TELEGRAM_BOT_TOKEN")
    if telegram_token:
        telegram_config = _enable_from_env(Platform.TELEGRAM)
        telegram_config.token = telegram_token
    
    # Reply threading mode for Telegram (off/first/all)
    telegram_reply_mode = getenv("TELEGRAM_REPLY_TO_MODE", "").lower()
    if telegram_reply_mode in {"off", "first", "all"}:
        if Platform.TELEGRAM not in config.platforms:
            config.platforms[Platform.TELEGRAM] = PlatformConfig()
        config.platforms[Platform.TELEGRAM].reply_to_mode = telegram_reply_mode
    
    telegram_fallback_ips = getenv("TELEGRAM_FALLBACK_IPS", "")
    if telegram_fallback_ips:
        if Platform.TELEGRAM not in config.platforms:
            config.platforms[Platform.TELEGRAM] = PlatformConfig()
        config.platforms[Platform.TELEGRAM].extra["fallback_ips"] = [
            ip.strip() for ip in telegram_fallback_ips.split(",") if ip.strip()
        ]

    telegram_home = getenv("TELEGRAM_HOME_CHANNEL")
    if telegram_home and Platform.TELEGRAM in config.platforms:
        config.platforms[Platform.TELEGRAM].home_channel = HomeChannel(
            platform=Platform.TELEGRAM,
            chat_id=telegram_home,
            name=getenv("TELEGRAM_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("TELEGRAM_HOME_CHANNEL_THREAD_ID") or None,
        )
    
    # Discord
    discord_token = getenv("DISCORD_BOT_TOKEN")
    if discord_token:
        discord_config = _enable_from_env(Platform.DISCORD)
        discord_config.token = discord_token
    
    discord_home = getenv("DISCORD_HOME_CHANNEL")
    if discord_home and Platform.DISCORD in config.platforms:
        config.platforms[Platform.DISCORD].home_channel = HomeChannel(
            platform=Platform.DISCORD,
            chat_id=discord_home,
            name=getenv("DISCORD_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("DISCORD_HOME_CHANNEL_THREAD_ID") or None,
        )
    
    # Reply threading mode for Discord (off/first/all)
    discord_reply_mode = getenv("DISCORD_REPLY_TO_MODE", "").lower()
    if discord_reply_mode in {"off", "first", "all"}:
        if Platform.DISCORD not in config.platforms:
            config.platforms[Platform.DISCORD] = PlatformConfig()
        config.platforms[Platform.DISCORD].reply_to_mode = discord_reply_mode
    
    # WhatsApp (typically uses different auth mechanism)
    whatsapp_enabled = is_truthy_value(getenv("WHATSAPP_ENABLED", ""))
    whatsapp_disabled_explicitly = getenv("WHATSAPP_ENABLED", "").lower() in {"false", "0", "no"}
    if Platform.WHATSAPP in config.platforms:
        # YAML config exists — respect explicit disable
        wa_cfg = config.platforms[Platform.WHATSAPP]
        if whatsapp_disabled_explicitly:
            wa_cfg.enabled = False
        elif whatsapp_enabled:
            wa_cfg.enabled = True
        # else: keep whatever the YAML set
    elif whatsapp_enabled:
        config.platforms[Platform.WHATSAPP] = PlatformConfig(enabled=True)
    whatsapp_home = getenv("WHATSAPP_HOME_CHANNEL")
    if whatsapp_home and Platform.WHATSAPP in config.platforms:
        config.platforms[Platform.WHATSAPP].home_channel = HomeChannel(
            platform=Platform.WHATSAPP,
            chat_id=whatsapp_home,
            name=getenv("WHATSAPP_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("WHATSAPP_HOME_CHANNEL_THREAD_ID") or None,
        )

    # WhatsApp Cloud API (official Business Platform via Meta).
    # Distinct from the Baileys bridge: pure HTTP graph.facebook.com calls
    # outbound, public webhook inbound. Both adapters can run in parallel
    # against different phone numbers.
    whatsapp_cloud_phone_id = getenv("WHATSAPP_CLOUD_PHONE_NUMBER_ID")
    whatsapp_cloud_token = getenv("WHATSAPP_CLOUD_ACCESS_TOKEN")
    if whatsapp_cloud_phone_id and whatsapp_cloud_token:
        # Honors an explicit ``platforms.whatsapp_cloud.enabled: false`` (#48820).
        _enable_from_env(Platform.WHATSAPP_CLOUD)
        config.platforms[Platform.WHATSAPP_CLOUD].extra.update({
            "phone_number_id": whatsapp_cloud_phone_id,
            "access_token": whatsapp_cloud_token,
        })
        # Optional: app_id / app_secret (signature verification)
        wa_cloud_app_id = getenv("WHATSAPP_CLOUD_APP_ID")
        if wa_cloud_app_id:
            config.platforms[Platform.WHATSAPP_CLOUD].extra["app_id"] = wa_cloud_app_id
        wa_cloud_app_secret = getenv("WHATSAPP_CLOUD_APP_SECRET")
        if wa_cloud_app_secret:
            config.platforms[Platform.WHATSAPP_CLOUD].extra["app_secret"] = wa_cloud_app_secret
        # Optional: WABA id (analytics, future use)
        wa_cloud_waba_id = getenv("WHATSAPP_CLOUD_WABA_ID")
        if wa_cloud_waba_id:
            config.platforms[Platform.WHATSAPP_CLOUD].extra["waba_id"] = wa_cloud_waba_id
        # Webhook verify token — Meta hub.verify_token shared secret
        wa_cloud_verify_token = getenv("WHATSAPP_CLOUD_VERIFY_TOKEN")
        if wa_cloud_verify_token:
            config.platforms[Platform.WHATSAPP_CLOUD].extra["verify_token"] = wa_cloud_verify_token
        # Webhook server bind config (defaults baked into the adapter)
        wa_cloud_host = getenv("WHATSAPP_CLOUD_WEBHOOK_HOST")
        if wa_cloud_host:
            config.platforms[Platform.WHATSAPP_CLOUD].extra["webhook_host"] = wa_cloud_host
        wa_cloud_port = getenv("WHATSAPP_CLOUD_WEBHOOK_PORT")
        if wa_cloud_port:
            try:
                config.platforms[Platform.WHATSAPP_CLOUD].extra["webhook_port"] = int(wa_cloud_port)
            except ValueError:
                pass
        wa_cloud_path = getenv("WHATSAPP_CLOUD_WEBHOOK_PATH")
        if wa_cloud_path:
            config.platforms[Platform.WHATSAPP_CLOUD].extra["webhook_path"] = wa_cloud_path
        # Graph API version override (rarely needed)
        wa_cloud_api_version = getenv("WHATSAPP_CLOUD_API_VERSION")
        if wa_cloud_api_version:
            config.platforms[Platform.WHATSAPP_CLOUD].extra["api_version"] = wa_cloud_api_version
    whatsapp_cloud_home = getenv("WHATSAPP_CLOUD_HOME_CHANNEL")
    if whatsapp_cloud_home and Platform.WHATSAPP_CLOUD in config.platforms:
        config.platforms[Platform.WHATSAPP_CLOUD].home_channel = HomeChannel(
            platform=Platform.WHATSAPP_CLOUD,
            chat_id=whatsapp_cloud_home,
            name=getenv("WHATSAPP_CLOUD_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("WHATSAPP_CLOUD_HOME_CHANNEL_THREAD_ID") or None,
        )

    # Slack
    slack_token = getenv("SLACK_BOT_TOKEN")
    if slack_token:
        if Platform.SLACK not in config.platforms:
            # No yaml config for Slack — env-only setup, enable it
            config.platforms[Platform.SLACK] = PlatformConfig()
            config.platforms[Platform.SLACK].enabled = True
        else:
            slack_config = config.platforms[Platform.SLACK]
            # Read (don't pop) the explicit-enable marker: the registry-driven
            # plugin-enable pass below also needs it to avoid re-enabling a
            # platform the user explicitly disabled (Slack is now a plugin
            # entry — #41112). The flag is cleared once for all platforms in
            # the final cleanup at the end of _apply_env_overrides.
            enabled_was_explicit = bool(slack_config.extra.get("_enabled_explicit", False))
            if not slack_config.enabled and not enabled_was_explicit:
                # Top-level Slack settings such as channel prompts should not
                # turn an env-token setup into a disabled platform. Only an
                # explicit slack.enabled/platforms.slack.enabled false should.
                slack_config.enabled = True
            elif not slack_config.enabled:
                _warn_explicit_disable_beats_env(Platform.SLACK)
        # If yaml config exists, respect its enabled flag (don't override
        # explicit enabled: false). Token is still stored so skills that
        # send Slack messages can use it without activating the gateway adapter.
        config.platforms[Platform.SLACK].token = slack_token
    slack_home = getenv("SLACK_HOME_CHANNEL")
    if slack_home:
        slack_config = config.platforms.setdefault(
            Platform.SLACK,
            PlatformConfig(enabled=False),
        )
        existing_home = slack_config.home_channel
        same_home = existing_home is not None and existing_home.chat_id == slack_home
        slack_config.home_channel = HomeChannel(
            platform=Platform.SLACK,
            chat_id=slack_home,
            name=getenv("SLACK_HOME_CHANNEL_NAME", ""),
            thread_id=getenv("SLACK_HOME_CHANNEL_THREAD_ID") or None,
            user_id=existing_home.user_id if existing_home and same_home else None,
            scope_id=existing_home.scope_id if existing_home and same_home else None,
        )
    
    # Signal
    signal_url = getenv("SIGNAL_HTTP_URL")
    signal_account = getenv("SIGNAL_ACCOUNT")
    if signal_url and signal_account:
        signal_config = _enable_from_env(Platform.SIGNAL)
        signal_config.extra.update({
            "http_url": signal_url,
            "account": signal_account,
            "ignore_stories": is_truthy_value(getenv("SIGNAL_IGNORE_STORIES", "true")),
        })
    signal_home = getenv("SIGNAL_HOME_CHANNEL")
    if signal_home and Platform.SIGNAL in config.platforms:
        config.platforms[Platform.SIGNAL].home_channel = HomeChannel(
            platform=Platform.SIGNAL,
            chat_id=signal_home,
            name=getenv("SIGNAL_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("SIGNAL_HOME_CHANNEL_THREAD_ID") or None,
        )

    # Mattermost
    mattermost_token = getenv("MATTERMOST_TOKEN")
    if mattermost_token:
        mattermost_url = getenv("MATTERMOST_URL", "")
        if not mattermost_url:
            logger.warning("MATTERMOST_TOKEN set but MATTERMOST_URL is missing")
        mattermost_config = _enable_from_env(Platform.MATTERMOST)
        mattermost_config.token = mattermost_token
        mattermost_config.extra["url"] = mattermost_url
    mattermost_home = getenv("MATTERMOST_HOME_CHANNEL")
    if mattermost_home and Platform.MATTERMOST in config.platforms:
        config.platforms[Platform.MATTERMOST].home_channel = HomeChannel(
            platform=Platform.MATTERMOST,
            chat_id=mattermost_home,
            name=getenv("MATTERMOST_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("MATTERMOST_HOME_CHANNEL_THREAD_ID") or None,
        )

    # Matrix
    matrix_token = getenv("MATRIX_ACCESS_TOKEN")
    matrix_homeserver = getenv("MATRIX_HOMESERVER", "")
    if matrix_token or getenv("MATRIX_PASSWORD"):
        if not matrix_homeserver:
            logger.warning("MATRIX_ACCESS_TOKEN/MATRIX_PASSWORD set but MATRIX_HOMESERVER is missing")
        matrix_config = _enable_from_env(Platform.MATRIX)
        if matrix_token:
            matrix_config.token = matrix_token
        matrix_config.extra["homeserver"] = matrix_homeserver
        matrix_user = getenv("MATRIX_USER_ID", "")
        if matrix_user:
            matrix_config.extra["user_id"] = matrix_user
        matrix_password = getenv("MATRIX_PASSWORD", "")
        if matrix_password:
            matrix_config.extra["password"] = matrix_password
        matrix_e2ee_mode = getenv("MATRIX_E2EE_MODE", "").strip().lower()
        matrix_e2ee = (
            matrix_e2ee_mode in ("required", "require", "optional", "prefer", "preferred")
            or is_truthy_value(getenv("MATRIX_ENCRYPTION", ""))
        )
        matrix_config.extra["encryption"] = matrix_e2ee
        if matrix_e2ee_mode:
            matrix_config.extra["e2ee_mode"] = matrix_e2ee_mode
        matrix_device_id = getenv("MATRIX_DEVICE_ID", "")
        if matrix_device_id:
            matrix_config.extra["device_id"] = matrix_device_id
    matrix_home = getenv("MATRIX_HOME_ROOM")
    if matrix_home and Platform.MATRIX in config.platforms:
        config.platforms[Platform.MATRIX].home_channel = HomeChannel(
            platform=Platform.MATRIX,
            chat_id=matrix_home,
            name=getenv("MATRIX_HOME_ROOM_NAME", "Home"),
            thread_id=getenv("MATRIX_HOME_ROOM_THREAD_ID") or None,
        )

    # Home Assistant
    hass_token = getenv("HASS_TOKEN")
    if hass_token:
        # Honors an explicit ``platforms.homeassistant.enabled: false`` (#48820).
        _enable_from_env(Platform.HOMEASSISTANT)
        config.platforms[Platform.HOMEASSISTANT].token = hass_token
        hass_url = getenv("HASS_URL")
        if hass_url:
            config.platforms[Platform.HOMEASSISTANT].extra["url"] = hass_url

    # Email
    email_addr = getenv("EMAIL_ADDRESS")
    email_pwd = getenv("EMAIL_PASSWORD")
    email_imap = getenv("EMAIL_IMAP_HOST")
    email_smtp = getenv("EMAIL_SMTP_HOST")
    if all([email_addr, email_pwd, email_imap, email_smtp]):
        # Honors an explicit ``platforms.email.enabled: false`` (#48820).
        _enable_from_env(Platform.EMAIL)
        config.platforms[Platform.EMAIL].extra.update({
            "address": email_addr,
            "imap_host": email_imap,
            "smtp_host": email_smtp,
        })
    email_home = getenv("EMAIL_HOME_ADDRESS")
    if email_home and Platform.EMAIL in config.platforms:
        config.platforms[Platform.EMAIL].home_channel = HomeChannel(
            platform=Platform.EMAIL,
            chat_id=email_home,
            name=getenv("EMAIL_HOME_ADDRESS_NAME", "Home"),
            thread_id=getenv("EMAIL_HOME_ADDRESS_THREAD_ID") or None,
        )

    # SMS (Twilio)
    twilio_sid = getenv("TWILIO_ACCOUNT_SID")
    if twilio_sid:
        # Honors an explicit ``platforms.sms.enabled: false`` (#48820).
        _enable_from_env(Platform.SMS)
        config.platforms[Platform.SMS].api_key = getenv("TWILIO_AUTH_TOKEN", "")
    sms_home = getenv("SMS_HOME_CHANNEL")
    if sms_home and Platform.SMS in config.platforms:
        config.platforms[Platform.SMS].home_channel = HomeChannel(
            platform=Platform.SMS,
            chat_id=sms_home,
            name=getenv("SMS_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("SMS_HOME_CHANNEL_THREAD_ID") or None,
        )

    # API Server
    api_server_key = getenv("API_SERVER_KEY", "")
    api_server_cors_origins = getenv("API_SERVER_CORS_ORIGINS", "")
    api_server_port = getenv("API_SERVER_PORT")
    api_server_host = getenv("API_SERVER_HOST")
    # Require a usable key: API_SERVER_ENABLED alone would load an
    # unauthenticated platform whose adapter refuses to start at connect()
    # anyway (startup guard in gateway/platforms/api_server.py), leaving the
    # reconnect watcher spinning and logging errors forever. Same strength
    # bar as the startup guard (has_usable_secret, min_length=16).
    if _has_usable_api_server_key(api_server_key):
        if Platform.API_SERVER not in config.platforms:
            config.platforms[Platform.API_SERVER] = PlatformConfig()
        # Respect an explicit ``enabled: false`` in config.yaml (flagged by
        # ``_enabled_explicit``). In multiplex mode a secondary profile's
        # config.yaml pins ``platforms.api_server.enabled: false`` so it shares
        # the default profile's listener instead of binding its own port. That
        # profile still inherits the process-level env (including
        # ``API_SERVER_KEY``); without this guard the env-var presence would
        # force-enable the listener and trip the MultiplexConfigError check.
        # Pop (don't read) the marker — the api_server branch is terminal (no
        # later registry pass re-enables it), so this both consumes the flag and
        # avoids reading it twice, matching the pop convention used elsewhere.
        api_server_explicit = config.platforms[Platform.API_SERVER].extra.pop("_enabled_explicit", False)
        if not api_server_explicit or config.platforms[Platform.API_SERVER].enabled:
            config.platforms[Platform.API_SERVER].enabled = True
        if api_server_key:
            config.platforms[Platform.API_SERVER].extra["key"] = api_server_key
        if api_server_cors_origins:
            origins = [origin.strip() for origin in api_server_cors_origins.split(",") if origin.strip()]
            if origins:
                config.platforms[Platform.API_SERVER].extra["cors_origins"] = origins
        if api_server_port:
            try:
                config.platforms[Platform.API_SERVER].extra["port"] = int(api_server_port)
            except ValueError:
                pass
        if api_server_host:
            config.platforms[Platform.API_SERVER].extra["host"] = api_server_host
        api_server_model_name = getenv("API_SERVER_MODEL_NAME", "")
        if api_server_model_name:
            config.platforms[Platform.API_SERVER].extra["model_name"] = api_server_model_name

    # Webhook platform
    webhook_enabled = is_truthy_value(getenv("WEBHOOK_ENABLED", ""))
    webhook_port = getenv("WEBHOOK_PORT")
    webhook_secret = getenv("WEBHOOK_SECRET", "")
    if webhook_enabled:
        if Platform.WEBHOOK not in config.platforms:
            config.platforms[Platform.WEBHOOK] = PlatformConfig()
        # Honor an explicit ``enabled: false`` in config.yaml (flagged by
        # ``_enabled_explicit``). In multiplex mode a secondary profile's
        # config.yaml pins ``platforms.webhook.enabled: false`` so it shares
        # the default profile's listener instead of binding its own port. That
        # profile may still carry ``WEBHOOK_ENABLED`` in its own .env (or the
        # process env, single-profile); without this guard the env var would
        # force-enable the listener and trip the MultiplexConfigError check.
        # Pop (don't read) the marker — the webhook branch is terminal (no
        # later registry pass re-enables it), matching the api_server branch
        # above.
        webhook_explicit = config.platforms[Platform.WEBHOOK].extra.pop(
            "_enabled_explicit", False
        )
        if not webhook_explicit or config.platforms[Platform.WEBHOOK].enabled:
            config.platforms[Platform.WEBHOOK].enabled = True
        if webhook_port:
            try:
                config.platforms[Platform.WEBHOOK].extra["port"] = int(webhook_port)
            except ValueError:
                pass
        if webhook_secret:
            config.platforms[Platform.WEBHOOK].extra["secret"] = webhook_secret

    # Microsoft Graph webhook platform
    msgraph_webhook_enabled = is_truthy_value(getenv("MSGRAPH_WEBHOOK_ENABLED", ""))
    msgraph_webhook_port = getenv("MSGRAPH_WEBHOOK_PORT")
    msgraph_webhook_client_state = getenv("MSGRAPH_WEBHOOK_CLIENT_STATE", "")
    msgraph_webhook_resources = getenv("MSGRAPH_WEBHOOK_ACCEPTED_RESOURCES", "")
    msgraph_webhook_allowed_cidrs = getenv(
        "MSGRAPH_WEBHOOK_ALLOWED_SOURCE_CIDRS", ""
    )
    if (
        msgraph_webhook_enabled
        or Platform.MSGRAPH_WEBHOOK in config.platforms
        or msgraph_webhook_port
        or msgraph_webhook_client_state
        or msgraph_webhook_resources
        or msgraph_webhook_allowed_cidrs
    ):
        if Platform.MSGRAPH_WEBHOOK not in config.platforms:
            config.platforms[Platform.MSGRAPH_WEBHOOK] = PlatformConfig()
        if msgraph_webhook_enabled:
            # Same explicit-disable guard as the webhook branch above (#85637).
            # READ (don't pop) the marker here: the relay-exclusive pass below
            # still consults it, and the end-of-function scrub removes it for
            # every platform.
            msgraph_cfg = config.platforms[Platform.MSGRAPH_WEBHOOK]
            if not msgraph_cfg.extra.get("_enabled_explicit", False) or msgraph_cfg.enabled:
                msgraph_cfg.enabled = True
        if msgraph_webhook_port:
            try:
                config.platforms[Platform.MSGRAPH_WEBHOOK].extra["port"] = int(
                    msgraph_webhook_port
                )
            except ValueError:
                pass
        if msgraph_webhook_client_state:
            config.platforms[Platform.MSGRAPH_WEBHOOK].extra["client_state"] = (
                msgraph_webhook_client_state
            )
        if msgraph_webhook_resources:
            resources = [
                resource.strip()
                for resource in msgraph_webhook_resources.split(",")
                if resource.strip()
            ]
            if resources:
                config.platforms[Platform.MSGRAPH_WEBHOOK].extra[
                    "accepted_resources"
                ] = resources
        if msgraph_webhook_allowed_cidrs:
            cidrs = [
                cidr.strip()
                for cidr in msgraph_webhook_allowed_cidrs.split(",")
                if cidr.strip()
            ]
            if cidrs:
                config.platforms[Platform.MSGRAPH_WEBHOOK].extra[
                    "allowed_source_cidrs"
                ] = cidrs

    # DingTalk
    dingtalk_client_id = getenv("DINGTALK_CLIENT_ID")
    dingtalk_client_secret = getenv("DINGTALK_CLIENT_SECRET")
    if dingtalk_client_id and dingtalk_client_secret:
        # Honors an explicit ``platforms.dingtalk.enabled: false`` (#48820).
        _enable_from_env(Platform.DINGTALK)
        config.platforms[Platform.DINGTALK].extra.update({
            "client_id": dingtalk_client_id,
            "client_secret": dingtalk_client_secret,
        })
        dingtalk_home = getenv("DINGTALK_HOME_CHANNEL")
        if dingtalk_home:
            config.platforms[Platform.DINGTALK].home_channel = HomeChannel(
                platform=Platform.DINGTALK,
                chat_id=dingtalk_home,
                name=getenv("DINGTALK_HOME_CHANNEL_NAME", "Home"),
                thread_id=getenv("DINGTALK_HOME_CHANNEL_THREAD_ID") or None,
            )

    # Feishu / Lark
    feishu_app_id = getenv("FEISHU_APP_ID")
    feishu_app_secret = getenv("FEISHU_APP_SECRET")
    if feishu_app_id and feishu_app_secret:
        # Honors an explicit ``platforms.feishu.enabled: false`` (#48820).
        _enable_from_env(Platform.FEISHU)
        config.platforms[Platform.FEISHU].extra.update({
            "app_id": feishu_app_id,
            "app_secret": feishu_app_secret,
            "domain": getenv("FEISHU_DOMAIN", "feishu"),
            "connection_mode": getenv("FEISHU_CONNECTION_MODE", "websocket"),
        })
        feishu_encrypt_key = getenv("FEISHU_ENCRYPT_KEY", "")
        if feishu_encrypt_key:
            config.platforms[Platform.FEISHU].extra["encrypt_key"] = feishu_encrypt_key
        feishu_verification_token = getenv("FEISHU_VERIFICATION_TOKEN", "")
        if feishu_verification_token:
            config.platforms[Platform.FEISHU].extra["verification_token"] = feishu_verification_token
        feishu_home = getenv("FEISHU_HOME_CHANNEL")
        if feishu_home:
            config.platforms[Platform.FEISHU].home_channel = HomeChannel(
                platform=Platform.FEISHU,
                chat_id=feishu_home,
                name=getenv("FEISHU_HOME_CHANNEL_NAME", "Home"),
                thread_id=getenv("FEISHU_HOME_CHANNEL_THREAD_ID") or None,
            )

    # WeCom (Enterprise WeChat)
    wecom_bot_id = getenv("WECOM_BOT_ID")
    wecom_secret = getenv("WECOM_SECRET")
    if wecom_bot_id and wecom_secret:
        # Honors an explicit ``platforms.wecom.enabled: false`` (#48820).
        _enable_from_env(Platform.WECOM)
        config.platforms[Platform.WECOM].extra.update({
            "bot_id": wecom_bot_id,
            "secret": wecom_secret,
        })
        wecom_ws_url = getenv("WECOM_WEBSOCKET_URL", "")
        if wecom_ws_url:
            config.platforms[Platform.WECOM].extra["websocket_url"] = wecom_ws_url
        wecom_home = getenv("WECOM_HOME_CHANNEL")
        if wecom_home:
            config.platforms[Platform.WECOM].home_channel = HomeChannel(
                platform=Platform.WECOM,
                chat_id=wecom_home,
                name=getenv("WECOM_HOME_CHANNEL_NAME", "Home"),
                thread_id=getenv("WECOM_HOME_CHANNEL_THREAD_ID") or None,
            )

    # WeCom callback mode (self-built apps)
    wecom_callback_corp_id = getenv("WECOM_CALLBACK_CORP_ID")
    wecom_callback_corp_secret = getenv("WECOM_CALLBACK_CORP_SECRET")
    if wecom_callback_corp_id and wecom_callback_corp_secret:
        # Honors an explicit ``platforms.wecom_callback.enabled: false`` (#48820).
        _enable_from_env(Platform.WECOM_CALLBACK)
        config.platforms[Platform.WECOM_CALLBACK].extra.update({
            "corp_id": wecom_callback_corp_id,
            "corp_secret": wecom_callback_corp_secret,
            "agent_id": getenv("WECOM_CALLBACK_AGENT_ID", ""),
            "token": getenv("WECOM_CALLBACK_TOKEN", ""),
            "encoding_aes_key": getenv("WECOM_CALLBACK_ENCODING_AES_KEY", ""),
            # No default here: an unset WECOM_CALLBACK_HOST leaves extra.host
            # falsy so the adapter's dual-stack DEFAULT_HOST=None applies
            # (binds IPv4 + IPv6; "0.0.0.0" was IPv4-only, NS-603).
            "host": getenv("WECOM_CALLBACK_HOST", ""),
            "port": getenv_int("WECOM_CALLBACK_PORT", 8645),
        })

    # Weixin (personal WeChat via iLink Bot API)
    weixin_token = getenv("WEIXIN_TOKEN")
    weixin_account_id = getenv("WEIXIN_ACCOUNT_ID")
    if weixin_token or weixin_account_id:
        # Honors an explicit ``platforms.weixin.enabled: false`` (#48820).
        _enable_from_env(Platform.WEIXIN)
        if weixin_token:
            config.platforms[Platform.WEIXIN].token = weixin_token
        extra = config.platforms[Platform.WEIXIN].extra
        if weixin_account_id:
            extra["account_id"] = weixin_account_id
        weixin_base_url = getenv("WEIXIN_BASE_URL", "").strip()
        if weixin_base_url:
            extra["base_url"] = weixin_base_url.rstrip("/")
        weixin_cdn_base_url = getenv("WEIXIN_CDN_BASE_URL", "").strip()
        if weixin_cdn_base_url:
            extra["cdn_base_url"] = weixin_cdn_base_url.rstrip("/")
        weixin_dm_policy = getenv("WEIXIN_DM_POLICY", "").strip().lower()
        if weixin_dm_policy:
            extra["dm_policy"] = weixin_dm_policy
        weixin_group_policy = getenv("WEIXIN_GROUP_POLICY", "").strip().lower()
        if weixin_group_policy:
            extra["group_policy"] = weixin_group_policy
        weixin_allowed_users = getenv("WEIXIN_ALLOWED_USERS", "").strip()
        if weixin_allowed_users:
            extra["allow_from"] = weixin_allowed_users
        weixin_group_allowed_users = getenv("WEIXIN_GROUP_ALLOWED_USERS", "").strip()
        if weixin_group_allowed_users:
            extra["group_allow_from"] = weixin_group_allowed_users
        weixin_split_multiline = getenv("WEIXIN_SPLIT_MULTILINE_MESSAGES", "").strip()
        if weixin_split_multiline:
            extra["split_multiline_messages"] = weixin_split_multiline
        weixin_home = getenv("WEIXIN_HOME_CHANNEL", "").strip()
        if weixin_home:
            config.platforms[Platform.WEIXIN].home_channel = HomeChannel(
                platform=Platform.WEIXIN,
                chat_id=weixin_home,
                name=getenv("WEIXIN_HOME_CHANNEL_NAME", "Home"),
                thread_id=getenv("WEIXIN_HOME_CHANNEL_THREAD_ID") or None,
            )

    # BlueBubbles (iMessage)
    bluebubbles_server_url = getenv("BLUEBUBBLES_SERVER_URL")
    bluebubbles_password = getenv("BLUEBUBBLES_PASSWORD")
    if bluebubbles_server_url and bluebubbles_password:
        # Honors an explicit ``platforms.bluebubbles.enabled: false`` (#48820).
        _enable_from_env(Platform.BLUEBUBBLES)
        config.platforms[Platform.BLUEBUBBLES].extra.update({
            "server_url": bluebubbles_server_url.rstrip("/"),
            "password": bluebubbles_password,
            "webhook_host": getenv("BLUEBUBBLES_WEBHOOK_HOST", "127.0.0.1"),
            "webhook_port": getenv_int("BLUEBUBBLES_WEBHOOK_PORT", 8645),
            "webhook_path": getenv("BLUEBUBBLES_WEBHOOK_PATH", "/bluebubbles-webhook"),
            "send_read_receipts": is_truthy_value(getenv("BLUEBUBBLES_SEND_READ_RECEIPTS", "true")),
        })
        bluebubbles_require_mention = getenv("BLUEBUBBLES_REQUIRE_MENTION")
        if bluebubbles_require_mention is not None:
            config.platforms[Platform.BLUEBUBBLES].extra["require_mention"] = (
                bluebubbles_require_mention.lower() in {"true", "1", "yes", "on"}
            )
        bluebubbles_mention_patterns = getenv("BLUEBUBBLES_MENTION_PATTERNS")
        if bluebubbles_mention_patterns:
            try:
                parsed_patterns = json.loads(bluebubbles_mention_patterns)
            except Exception:
                parsed_patterns = [
                    part.strip()
                    for part in bluebubbles_mention_patterns.replace("\n", ",").split(",")
                    if part.strip()
                ]
            config.platforms[Platform.BLUEBUBBLES].extra["mention_patterns"] = parsed_patterns
    bluebubbles_home = getenv("BLUEBUBBLES_HOME_CHANNEL")
    if bluebubbles_home and Platform.BLUEBUBBLES in config.platforms:
        config.platforms[Platform.BLUEBUBBLES].home_channel = HomeChannel(
            platform=Platform.BLUEBUBBLES,
            chat_id=bluebubbles_home,
            name=getenv("BLUEBUBBLES_HOME_CHANNEL_NAME", "Home"),
            thread_id=getenv("BLUEBUBBLES_HOME_CHANNEL_THREAD_ID") or None,
        )

    # QQ (Official Bot API v2)
    qq_app_id = getenv("QQ_APP_ID")
    qq_client_secret = getenv("QQ_CLIENT_SECRET")
    if qq_app_id or qq_client_secret:
        # Honors an explicit ``platforms.qqbot.enabled: false`` (#48820).
        _enable_from_env(Platform.QQBOT)
        extra = config.platforms[Platform.QQBOT].extra
        if qq_app_id:
            extra["app_id"] = qq_app_id
        if qq_client_secret:
            extra["client_secret"] = qq_client_secret
        qq_allowed_users = getenv("QQ_ALLOWED_USERS", "").strip()
        if qq_allowed_users:
            extra["allow_from"] = qq_allowed_users
        qq_group_allowed = getenv("QQ_GROUP_ALLOWED_USERS", "").strip()
        if qq_group_allowed:
            extra["group_allow_from"] = qq_group_allowed
        qq_home = getenv("QQBOT_HOME_CHANNEL", "").strip()
        qq_home_name_env = "QQBOT_HOME_CHANNEL_NAME"
        if not qq_home:
            # Back-compat: accept the pre-rename name and log a one-time warning.
            legacy_home = getenv("QQ_HOME_CHANNEL", "").strip()
            if legacy_home:
                qq_home = legacy_home
                qq_home_name_env = "QQ_HOME_CHANNEL_NAME"
                logging.getLogger(__name__).warning(
                    "QQ_HOME_CHANNEL is deprecated; rename to QQBOT_HOME_CHANNEL "
                    "in your .env for consistency with the platform key."
                )
        if qq_home:
            config.platforms[Platform.QQBOT].home_channel = HomeChannel(
                platform=Platform.QQBOT,
                chat_id=qq_home,
                name=getenv("QQBOT_HOME_CHANNEL_NAME") or getenv(qq_home_name_env, "Home"),
                thread_id=(
                    getenv("QQBOT_HOME_CHANNEL_THREAD_ID")
                    or getenv("QQ_HOME_CHANNEL_THREAD_ID")
                    or None
                ),
            )

    # Yuanbao — YUANBAO_APP_ID preferred
    yuanbao_app_id = getenv("YUANBAO_APP_ID") or getenv("YUANBAO_APP_KEY")
    yuanbao_app_secret = getenv("YUANBAO_APP_SECRET")
    if yuanbao_app_id and yuanbao_app_secret:
        # Honors an explicit ``platforms.yuanbao.enabled: false`` (#48820).
        _enable_from_env(Platform.YUANBAO)
        extra = config.platforms[Platform.YUANBAO].extra
        extra["app_id"] = yuanbao_app_id
        extra["app_secret"] = yuanbao_app_secret
        yuanbao_bot_id = getenv("YUANBAO_BOT_ID")
        if yuanbao_bot_id:
            extra["bot_id"] = yuanbao_bot_id
        yuanbao_ws_url = getenv("YUANBAO_WS_URL")
        if yuanbao_ws_url:
            extra["ws_url"] = yuanbao_ws_url
        yuanbao_api_domain = getenv("YUANBAO_API_DOMAIN")
        if yuanbao_api_domain:
            extra["api_domain"] = yuanbao_api_domain
        yuanbao_route_env = getenv("YUANBAO_ROUTE_ENV")
        if yuanbao_route_env:
            extra["route_env"] = yuanbao_route_env
        yuanbao_home = getenv("YUANBAO_HOME_CHANNEL")
        if yuanbao_home:
            config.platforms[Platform.YUANBAO].home_channel = HomeChannel(
                platform=Platform.YUANBAO,
                chat_id=yuanbao_home,
                name=getenv("YUANBAO_HOME_CHANNEL_NAME", "Home"),
                thread_id=getenv("YUANBAO_HOME_CHANNEL_THREAD_ID") or None,
            )
        yuanbao_dm_policy = getenv("YUANBAO_DM_POLICY")
        if yuanbao_dm_policy:
            extra["dm_policy"] = yuanbao_dm_policy.strip().lower()
        yuanbao_dm_allow_from = getenv("YUANBAO_DM_ALLOW_FROM")
        if yuanbao_dm_allow_from:
            extra["dm_allow_from"] = yuanbao_dm_allow_from
        yuanbao_group_policy = getenv("YUANBAO_GROUP_POLICY")
        if yuanbao_group_policy:
            extra["group_policy"] = yuanbao_group_policy.strip().lower()
        yuanbao_group_allow_from = getenv("YUANBAO_GROUP_ALLOW_FROM")
        if yuanbao_group_allow_from:
            extra["group_allow_from"] = yuanbao_group_allow_from

    # Session settings
    idle_minutes = getenv("SESSION_IDLE_MINUTES")
    if idle_minutes:
        try:
            config.default_reset_policy.idle_minutes = int(idle_minutes)
        except ValueError:
            pass
    
    reset_hour = getenv("SESSION_RESET_HOUR")
    if reset_hour:
        try:
            config.default_reset_policy.at_hour = int(reset_hour)
        except ValueError:
            pass

    # Registry-driven enable for plugin platforms.  Built-ins have explicit
    # blocks above.  A plugin platform is enabled when its credentials are
    # configured (``is_connected``) and its dependencies are either present
    # (passive ``check_fn``) or installable on demand (``ensure_deps_fn``,
    # run later by ``create_adapter()`` — never here).  Plugins that need to
    # seed ``PlatformConfig.extra`` from env vars (e.g. Google Chat's
    # project_id / subscription_name) can supply ``env_enablement_fn`` on
    # their PlatformEntry — called here BEFORE adapter construction.
    #
    # Enablement gate (#31116): when a plugin registers ``is_connected``
    # (the "has the user actually configured credentials for this?" check),
    # we MUST consult it before flipping ``enabled = True``.  Otherwise
    # ``check_fn`` alone — a passive "is the SDK importable?" probe —
    # silently enables platforms the user never opted into, and the gateway
    # then tries to connect to Discord / Teams / Google Chat with no token
    # and emits noisy retry-forever errors.  ``_platform_status`` was
    # already fixed for the same bug class in commit 7849a3d73; this is the
    # runtime counterpart.
    try:
        from hermes_cli.plugins import discover_plugins
        discover_plugins()  # idempotent
        from gateway.platform_registry import platform_registry
        for entry in platform_registry.plugin_entries():
            try:
                platform = Platform(entry.name)
            except Exception as e:
                logger.debug("unknown platform name %r: %s", entry.name, e)
                continue
            existing_cfg = config.platforms.get(platform)
            # Respect an explicit ``enabled: false`` (YAML / gateway.json /
            # dashboard PUT).  ``_enabled_explicit`` is set in
            # load_gateway_config() (via _merge_platform_map / the shared-key
            # loop) when the user wrote ``enabled`` for this platform; if they
            # explicitly disabled it, never re-enable here just because
            # check_fn() / is_connected() pass (e.g. a token is present but the
            # user set telegram.enabled: false). #41112.
            if (
                existing_cfg is not None
                and not existing_cfg.enabled
                and bool((existing_cfg.extra or {}).get("_enabled_explicit", False))
            ):
                continue
            # Seed candidate extras from ``env_enablement_fn`` so plugins
            # whose ``is_connected`` reads ``config.extra`` (e.g. Google
            # Chat's ``_is_connected`` checks ``config.extra["project_id"]``)
            # see the same state they will after enablement. Without this,
            # Google-Chat-on-env-vars-only setups silently fail the gate
            # below even though the user is configured.  Plugins whose
            # ``is_connected`` reads env vars directly (Discord, IRC,
            # Teams, LINE, ntfy, Simplex) are unaffected; this only
            # restores Google Chat.
            seed_for_probe = None
            if entry.env_enablement_fn is not None:
                try:
                    seed_for_probe = entry.env_enablement_fn()
                except Exception as e:
                    logger.debug(
                        "env_enablement_fn for %s raised: %s", entry.name, e
                    )
                    seed_for_probe = None

            # Only consult is_connected for platforms that are NOT already
            # explicitly configured in YAML / env (existing_cfg with
            # enabled=True means the user wrote it themselves or another
            # env-var bridge enabled it — keep that decision).
            if existing_cfg is None or not existing_cfg.enabled:
                if entry.is_connected is not None:
                    try:
                        # Probe with ``enabled=True`` since we're asking
                        # "would this plugin BE configured if we enabled
                        # it?" not "is it currently enabled?". Google
                        # Chat's ``_is_connected`` short-circuits on
                        # ``config.enabled`` being False, which on the
                        # default ``PlatformConfig()`` would fail the
                        # gate even with proper env vars set.
                        if existing_cfg is not None:
                            probe_cfg = existing_cfg
                            if not probe_cfg.enabled:
                                probe_cfg = PlatformConfig(
                                    enabled=True,
                                    extra=dict(probe_cfg.extra or {}),
                                )
                        else:
                            probe_cfg = PlatformConfig(enabled=True)
                        if isinstance(seed_for_probe, dict) and seed_for_probe:
                            # Don't mutate ``existing_cfg``; the probe gets
                            # a transient view with env-seeded extras layered
                            # on top of whatever's already there.
                            probe_extra = dict(getattr(probe_cfg, "extra", {}) or {})
                            for k, v in seed_for_probe.items():
                                if k == "home_channel":
                                    continue
                                probe_extra.setdefault(k, v)
                            probe_cfg = PlatformConfig(
                                enabled=True,
                                extra=probe_extra,
                            )
                        configured = bool(entry.is_connected(probe_cfg))
                    except Exception as exc:
                        logger.debug(
                            "is_connected for %s raised: %s — skipping enablement",
                            entry.name, exc,
                        )
                        configured = False
                    if not configured:
                        logger.debug(
                            "Plugin platform '%s' available but not configured "
                            "(is_connected returned False) — skipping enable",
                            entry.name,
                        )
                        continue
            # Verify dependencies LAST — only for platforms that are already
            # enabled or passed the credential gate above.  ``check_fn`` is a
            # PASSIVE probe (never installs); a platform whose deps are
            # missing but which registered ``ensure_deps_fn`` still gets
            # enabled here — the registry's ``create_adapter()`` runs the
            # active installer at gateway start, when the user actually
            # wants the platform up.  Historically the ACTIVE installer was
            # wired as ``check_fn`` and this sweep pip-installed
            # Discord/Telegram/Slack/Feishu/Dingtalk SDKs on every
            # ``load_gateway_config()`` call — including the desktop/dashboard
            # readiness probe (``GET /api/status``) — blocking startup until
            # every install finished and boot-looping the desktop app at 94%.
            # The check_fn/ensure_deps_fn split (#79812) makes that
            # impossible by construction.
            try:
                deps_ok = bool(entry.check_fn())
            except Exception as e:
                logger.debug("check_fn for %s raised: %s", entry.name, e)
                deps_ok = False
            if not deps_ok and entry.ensure_deps_fn is None:
                continue
            if platform not in config.platforms:
                config.platforms[platform] = PlatformConfig()
            config.platforms[platform].enabled = True
            # Commit env-seeded extras onto the now-enabled platform.
            # We've already called ``env_enablement_fn`` above (for the
            # probe); reuse that result instead of calling it twice.
            if isinstance(seed_for_probe, dict) and seed_for_probe:
                seed = dict(seed_for_probe)
                # Extract the home_channel dict (if provided) so we wire it
                # up as a proper HomeChannel dataclass.  Everything else is
                # merged into ``extra``.
                home = seed.pop("home_channel", None)
                config.platforms[platform].extra.update(seed)
                if isinstance(home, dict) and home.get("chat_id"):
                    config.platforms[platform].home_channel = HomeChannel(
                        platform=platform,
                        chat_id=str(home["chat_id"]),
                        name=str(home.get("name") or "Home"),
                        thread_id=(
                            str(home["thread_id"])
                            if home.get("thread_id")
                            else None
                        ),
                    )
    except Exception as e:
        logger.debug("Plugin platform enable pass failed: %s", e)

    # Relay (generic connector-fronted platform, EXPERIMENTAL). Enabled when a
    # connector relay URL is configured via GATEWAY_RELAY_URL (env) or
    # gateway.relay_url (config.yaml). The adapter is registered into the
    # platform_registry at gateway startup (gateway.relay.register_relay_adapter)
    # and dials OUT to the connector — so, like Telegram/Matrix, it has no public
    # inbound port and just needs Platform.RELAY present+enabled in
    # config.platforms for start_gateway()'s connect loop to bring it up. The
    # connected-checker (Platform.RELAY in _PLATFORM_CONNECTED_CHECKERS) keys on
    # extra["relay_url"], so mirror the URL into extra here.
    relay_url_env = getenv("GATEWAY_RELAY_URL", "").strip()
    relay_url_yaml = ""
    existing_relay = config.platforms.get(Platform.RELAY)
    if existing_relay is not None:
        relay_url_yaml = str(existing_relay.extra.get("relay_url") or "").strip()
    relay_url_val = relay_url_env or relay_url_yaml
    if relay_url_val:
        relay_config = _enable_from_env(Platform.RELAY)
        relay_config.extra["relay_url"] = relay_url_val.rstrip("/")

    # Relay-exclusive: a GATEWAY_RELAY_URL env stamp marks a connector-fronted
    # deployment where the connector owns every platform connection. Any
    # directly-connected messaging adapter in the same process would be a
    # second, unmanaged ingress path (duplicate deliveries, split sessions,
    # and a live socket that disarms scale-to-zero), so the env stamp disables
    # all other messaging platforms — including ones explicitly enabled in
    # config.yaml. Non-messaging surfaces (local, api_server, webhook — the
    # same exclusion set as the scale-to-zero arm gate) are untouched.
    # Deployments that configure relay only via gateway.relay_url in
    # config.yaml keep the old additive behavior (relay beside direct
    # adapters).
    #
    # Opt-out: GATEWAY_RELAY_ALLOW_DIRECT_PLATFORMS=true keeps direct
    # adapters running beside the relay for deployments that intentionally
    # mix both ingress paths. Like the trigger, it is a deploy-stamp env var,
    # not a config.yaml setting. Both reads go through the profile-scope-aware
    # getenv so multiplexed profiles see their own values, not the process
    # globals.
    allow_direct = is_truthy_value(
        getenv("GATEWAY_RELAY_ALLOW_DIRECT_PLATFORMS", "")
    )
    if relay_url_env and not allow_direct:
        non_messaging = {Platform.LOCAL, Platform.API_SERVER, Platform.WEBHOOK}
        for platform, platform_config in config.platforms.items():
            if platform is Platform.RELAY or platform in non_messaging:
                continue
            if not platform_config.enabled:
                continue
            if platform_config.extra.get("_enabled_explicit"):
                logger.warning(
                    "Relay connector is configured via GATEWAY_RELAY_URL; "
                    "disabling directly-connected platform '%s' even though "
                    "it is explicitly enabled in this profile's configuration. "
                    "All messaging goes through the connector on this "
                    "deployment. Set GATEWAY_RELAY_ALLOW_DIRECT_PLATFORMS=true "
                    "to keep direct platforms alongside the relay.",
                    platform.value,
                )
            else:
                logger.info(
                    "Relay connector is configured via GATEWAY_RELAY_URL; "
                    "disabling directly-connected platform '%s'.",
                    platform.value,
                )
            platform_config.enabled = False

    for platform_config in config.platforms.values():
        platform_config.extra.pop("_enabled_explicit", None)