Hermes-agent

2026-06-14 14:30:48 -04:00
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+"""Models.dev registry integration — primary database for providers and models.
+
+Fetches from https://models.dev/api.json — a community-maintained database
+of 4000+ models across 109+ providers.  Provides:
+
+- **Provider metadata**: name, base URL, env vars, documentation link
+- **Model metadata**: context window, max output, cost/M tokens, capabilities
+  (reasoning, tools, vision, PDF, audio), modalities, knowledge cutoff,
+  open-weights flag, family grouping, deprecation status
+
+Data resolution order (like TypeScript OpenCode):
+  1. Bundled snapshot (ships with the package — offline-first)
+  2. Disk cache (~/.hermes/models_dev_cache.json)
+  3. Network fetch (https://models.dev/api.json)
+  4. Background refresh every 60 minutes
+
+Other modules should import the dataclasses and query functions from here
+rather than parsing the raw JSON themselves.
+"""
+
+import json
+import logging
+import time
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any, Dict, List, Optional, Tuple
+
+from utils import atomic_json_write
+
+import requests
+
+logger = logging.getLogger(__name__)
+
+MODELS_DEV_URL = "https://models.dev/api.json"
+_MODELS_DEV_CACHE_TTL = 3600  # 1 hour in-memory
+
+# In-memory cache
+_models_dev_cache: Dict[str, Any] = {}
+_models_dev_cache_time: float = 0
+
+
+# ---------------------------------------------------------------------------
+# Dataclasses — rich metadata for providers and models
+# ---------------------------------------------------------------------------
+
+@dataclass
+class ModelInfo:
+    """Full metadata for a single model from models.dev."""
+
+    id: str
+    name: str
+    family: str
+    provider_id: str        # models.dev provider ID (e.g. "anthropic")
+
+    # Capabilities
+    reasoning: bool = False
+    tool_call: bool = False
+    attachment: bool = False       # supports image/file attachments (vision)
+    temperature: bool = False
+    structured_output: bool = False
+    open_weights: bool = False
+
+    # Modalities
+    input_modalities: Tuple[str, ...] = ()    # ("text", "image", "pdf", ...)
+    output_modalities: Tuple[str, ...] = ()
+
+    # Limits
+    context_window: int = 0
+    max_output: int = 0
+    max_input: Optional[int] = None
+
+    # Cost (per million tokens, USD)
+    cost_input: float = 0.0
+    cost_output: float = 0.0
+    cost_cache_read: Optional[float] = None
+    cost_cache_write: Optional[float] = None
+
+    # Metadata
+    knowledge_cutoff: str = ""
+    release_date: str = ""
+    status: str = ""          # "alpha", "beta", "deprecated", or ""
+    interleaved: Any = False  # True or {"field": "reasoning_content"}
+
+    def has_cost_data(self) -> bool:
+        return self.cost_input > 0 or self.cost_output > 0
+
+    def supports_vision(self) -> bool:
+        return self.attachment or "image" in self.input_modalities
+
+    def supports_pdf(self) -> bool:
+        return "pdf" in self.input_modalities
+
+    def supports_audio_input(self) -> bool:
+        return "audio" in self.input_modalities
+
+    def format_cost(self) -> str:
+        """Human-readable cost string, e.g. '$3.00/M in, $15.00/M out'."""
+        if not self.has_cost_data():
+            return "unknown"
+        parts = [f"${self.cost_input:.2f}/M in", f"${self.cost_output:.2f}/M out"]
+        if self.cost_cache_read is not None:
+            parts.append(f"cache read ${self.cost_cache_read:.2f}/M")
+        return ", ".join(parts)
+
+    def format_capabilities(self) -> str:
+        """Human-readable capabilities, e.g. 'reasoning, tools, vision, PDF'."""
+        caps = []
+        if self.reasoning:
+            caps.append("reasoning")
+        if self.tool_call:
+            caps.append("tools")
+        if self.supports_vision():
+            caps.append("vision")
+        if self.supports_pdf():
+            caps.append("PDF")
+        if self.supports_audio_input():
+            caps.append("audio")
+        if self.structured_output:
+            caps.append("structured output")
+        if self.open_weights:
+            caps.append("open weights")
+        return ", ".join(caps) if caps else "basic"
+
+
+@dataclass
+class ProviderInfo:
+    """Full metadata for a provider from models.dev."""
+
+    id: str                         # models.dev provider ID
+    name: str                       # display name
+    env: Tuple[str, ...]            # env var names for API key
+    api: str                        # base URL
+    doc: str = ""                   # documentation URL
+    model_count: int = 0
+
+
+# ---------------------------------------------------------------------------
+# Provider ID mapping: Hermes ↔ models.dev
+# ---------------------------------------------------------------------------
+
+# Hermes provider names → models.dev provider IDs
+PROVIDER_TO_MODELS_DEV: Dict[str, str] = {
+    "openrouter": "openrouter",
+    "novita": "novita-ai",
+    "anthropic": "anthropic",
+    "openai": "openai",
+    "openai-codex": "openai",
+    "zai": "zai",
+    "kimi": "kimi-for-coding",
+    "kimi-coding": "kimi-for-coding",
+    "moonshot": "kimi-for-coding",
+    "stepfun": "stepfun",
+    "kimi-coding-cn": "kimi-for-coding",
+    "minimax": "minimax",
+    "minimax-oauth": "minimax",
+    "minimax-cn": "minimax-cn",
+    "deepseek": "deepseek",
+    "alibaba": "alibaba",
+    "qwen-oauth": "alibaba",
+    "copilot": "github-copilot",
+    "opencode-zen": "opencode",
+    "opencode-go": "opencode-go",
+    "kilocode": "kilo",
+    "fireworks": "fireworks-ai",
+    "huggingface": "huggingface",
+    "gemini": "google",
+    "google": "google",
+    "xai": "xai",
+    # xAI OAuth is an authentication/transport path for the same xAI model
+    # catalog, so model metadata should resolve through the xAI provider.
+    "xai-oauth": "xai",
+    "xiaomi": "xiaomi",
+    "nvidia": "nvidia",
+    "groq": "groq",
+    "mistral": "mistral",
+    "togetherai": "togetherai",
+    "perplexity": "perplexity",
+    "cohere": "cohere",
+    "ollama-cloud": "ollama-cloud",
+}
+
+# Reverse mapping: models.dev → Hermes (built lazily)
+_MODELS_DEV_TO_PROVIDER: Optional[Dict[str, str]] = None
+
+
+
+def _get_cache_path() -> Path:
+    """Return path to disk cache file."""
+    from hermes_constants import get_hermes_home
+    return get_hermes_home() / "models_dev_cache.json"
+
+
+def _load_disk_cache() -> Dict[str, Any]:
+    """Load models.dev data from disk cache."""
+    try:
+        cache_path = _get_cache_path()
+        if cache_path.exists():
+            with open(cache_path, encoding="utf-8") as f:
+                return json.load(f)
+    except Exception as e:
+        logger.debug("Failed to load models.dev disk cache: %s", e)
+    return {}
+
+
+def _disk_cache_age_seconds() -> Optional[float]:
+    """Return age (in seconds) of the disk cache file, or None if missing.
+
+    Used by ``fetch_models_dev`` to short-circuit the network probe when
+    a recent on-disk cache exists. Errors (missing file, permission
+    denied, weird filesystem) all return None — callers fall through
+    to the network fetch path.
+    """
+    try:
+        cache_path = _get_cache_path()
+        if not cache_path.exists():
+            return None
+        mtime = cache_path.stat().st_mtime
+        age = time.time() - mtime
+        # Negative age means the file's mtime is in the future (clock skew
+        # or system clock reset). Treat as "unknown freshness" → fall
+        # through to network so we don't serve potentially-bad data
+        # forever.
+        if age < 0:
+            return None
+        return age
+    except Exception as e:
+        logger.debug("Failed to stat models.dev disk cache: %s", e)
+        return None
+
+
+def _save_disk_cache(data: Dict[str, Any]) -> None:
+    """Save models.dev data to disk cache atomically."""
+    try:
+        cache_path = _get_cache_path()
+        atomic_json_write(cache_path, data, indent=None, separators=(",", ":"))
+    except Exception as e:
+        logger.debug("Failed to save models.dev disk cache: %s", e)
+
+
+def fetch_models_dev(force_refresh: bool = False) -> Dict[str, Any]:
+    """Fetch models.dev registry. Cache hierarchy: in-mem → disk → network.
+
+    Returns the full registry dict keyed by provider ID, or empty dict on failure.
+
+    Cache hierarchy (when ``force_refresh=False``):
+      1. In-memory cache, populated and < TTL old → return immediately.
+      2. **Disk cache file < TTL old by mtime → load, populate in-mem, return.**
+         No network call. Saves ~500 ms per cold-start agent construction;
+         ``models.dev`` only changes when providers add new models, so a
+         1 hour staleness window is acceptable (same TTL as in-mem cache).
+      3. Network fetch → on success, save to disk + in-mem and return.
+      4. Network fails → fall back to ANY available disk cache (even stale)
+         with a short 5 min in-mem grace period before retrying network.
+
+    When ``force_refresh=True`` (used by ``hermes config refresh``, the
+    \"refresh model catalog\" code path), stages 1 and 2 are skipped. The
+    function always hits the network and only falls back to disk if the
+    network call fails.
+    """
+    global _models_dev_cache, _models_dev_cache_time
+
+    # Stage 1: fresh in-memory cache wins. This is the hot path on
+    # long-lived processes — no I/O, no system calls.
+    if (
+        not force_refresh
+        and _models_dev_cache
+        and (time.time() - _models_dev_cache_time) < _MODELS_DEV_CACHE_TTL
+    ):
+        return _models_dev_cache
+
+    # Stage 2: fresh-by-mtime disk cache short-circuits the network call.
+    # Only kicks in on cold-start processes (in-mem cache is empty or
+    # expired) and only when the user hasn't asked for a forced refresh.
+    # Skipped if the disk cache file is missing, unreadable, or older
+    # than _MODELS_DEV_CACHE_TTL.
+    if not force_refresh:
+        disk_age = _disk_cache_age_seconds()
+        if disk_age is not None and disk_age < _MODELS_DEV_CACHE_TTL:
+            disk_data = _load_disk_cache()
+            if disk_data:
+                _models_dev_cache = disk_data
+                # Anchor in-mem TTL to the disk file's age so we don't
+                # extend an already-aging cache by another full hour.
+                _models_dev_cache_time = time.time() - disk_age
+                logger.debug(
+                    "Loaded models.dev from fresh disk cache "
+                    "(%d providers, age=%.0fs)", len(disk_data), disk_age,
+                )
+                return _models_dev_cache
+
+    # Stage 3: network fetch.
+    try:
+        response = requests.get(MODELS_DEV_URL, timeout=15)
+        response.raise_for_status()
+        data = response.json()
+        if isinstance(data, dict) and data:
+            _models_dev_cache = data
+            _models_dev_cache_time = time.time()
+            _save_disk_cache(data)
+            logger.debug(
+                "Fetched models.dev registry: %d providers, %d total models",
+                len(data),
+                sum(len(p.get("models", {})) for p in data.values() if isinstance(p, dict)),
+            )
+            return data
+    except Exception as e:
+        logger.debug("Failed to fetch models.dev: %s", e)
+
+    # Stage 4: network failed — fall back to whatever disk cache exists,
+    # even if it's stale. Give it a short 5 min in-mem TTL so we retry
+    # the network soon instead of serving stale data for a full hour.
+    if not _models_dev_cache:
+        _models_dev_cache = _load_disk_cache()
+        if _models_dev_cache:
+            _models_dev_cache_time = time.time() - _MODELS_DEV_CACHE_TTL + 300
+            logger.debug("Loaded models.dev from disk cache (%d providers)", len(_models_dev_cache))
+
+    return _models_dev_cache
+
+
+def lookup_models_dev_context(provider: str, model: str) -> Optional[int]:
+    """Look up context_length for a provider+model combo in models.dev.
+
+    Returns the context window in tokens, or None if not found.
+    Handles case-insensitive matching and filters out context=0 entries.
+    """
+    mdev_provider_id = PROVIDER_TO_MODELS_DEV.get(provider)
+    if not mdev_provider_id:
+        return None
+
+    data = fetch_models_dev()
+    provider_data = data.get(mdev_provider_id)
+    if not isinstance(provider_data, dict):
+        return None
+
+    models = provider_data.get("models", {})
+    if not isinstance(models, dict):
+        return None
+
+    # Exact match
+    entry = models.get(model)
+    if entry:
+        ctx = _extract_context(entry)
+        if ctx:
+            return ctx
+
+    # Case-insensitive match
+    model_lower = model.lower()
+    for mid, mdata in models.items():
+        if mid.lower() == model_lower:
+            ctx = _extract_context(mdata)
+            if ctx:
+                return ctx
+
+    # Suffix-aware fallback: some providers (e.g. ollama-cloud) store
+    # model IDs with :cloud / -cloud suffixes in models.dev while the
+    # live API returns bare names.  Without this, kimi-k2.6 misses the
+    # kimi-k2.6:cloud entry and falls through to stale OpenRouter metadata
+    # reporting 32768 — tripping the 64k minimum-context guard.
+    # The suffix-stripping in fetch_ollama_cloud_models() handles the
+    # model-picker UX; this handles the context-length lookup path.
+    for suffix in (":cloud", "-cloud"):
+        suffixed_key = model + suffix
+        entry = models.get(suffixed_key)
+        if entry:
+            ctx = _extract_context(entry)
+            if ctx:
+                return ctx
+        # Also try case-insensitive
+        suffixed_lower = model_lower + suffix
+        for mid, mdata in models.items():
+            if mid.lower() == suffixed_lower:
+                ctx = _extract_context(mdata)
+                if ctx:
+                    return ctx
+
+    return None
+
+
+def _extract_context(entry: Dict[str, Any]) -> Optional[int]:
+    """Extract context_length from a models.dev model entry.
+
+    Returns None for invalid/zero values (some audio/image models have context=0).
+    """
+    if not isinstance(entry, dict):
+        return None
+    limit = entry.get("limit")
+    if not isinstance(limit, dict):
+        return None
+    ctx = limit.get("context")
+    if isinstance(ctx, (int, float)) and ctx > 0:
+        return int(ctx)
+    return None
+
+
+# ---------------------------------------------------------------------------
+# Model capability metadata
+# ---------------------------------------------------------------------------
+
+
+@dataclass
+class ModelCapabilities:
+    """Structured capability metadata for a model from models.dev."""
+
+    supports_tools: bool = True
+    supports_vision: bool = False
+    supports_reasoning: bool = False
+    context_window: int = 200000
+    max_output_tokens: int = 8192
+    model_family: str = ""
+
+
+def _get_provider_models(provider: str) -> Optional[Dict[str, Any]]:
+    """Resolve a Hermes provider ID to its models dict from models.dev.
+
+    Returns the models dict or None if the provider is unknown or has no data.
+    """
+    mdev_provider_id = PROVIDER_TO_MODELS_DEV.get(provider)
+    if not mdev_provider_id:
+        return None
+
+    data = fetch_models_dev()
+    provider_data = data.get(mdev_provider_id)
+    if not isinstance(provider_data, dict):
+        return None
+
+    models = provider_data.get("models", {})
+    if not isinstance(models, dict):
+        return None
+
+    return models
+
+
+def _find_model_entry(models: Dict[str, Any], model: str) -> Optional[Dict[str, Any]]:
+    """Find a model entry by exact match, then case-insensitive fallback."""
+    # Exact match
+    entry = models.get(model)
+    if isinstance(entry, dict):
+        return entry
+
+    # Case-insensitive match
+    model_lower = model.lower()
+    for mid, mdata in models.items():
+        if mid.lower() == model_lower and isinstance(mdata, dict):
+            return mdata
+
+    return None
+
+
+def get_model_capabilities(provider: str, model: str) -> Optional[ModelCapabilities]:
+    """Look up full capability metadata from models.dev cache.
+
+    Uses the existing fetch_models_dev() and PROVIDER_TO_MODELS_DEV mapping.
+    Returns None if model not found.
+
+    Extracts from model entry fields:
+      - reasoning  (bool)  → supports_reasoning
+      - tool_call  (bool)  → supports_tools
+      - attachment (bool)  → supports_vision
+      - limit.context (int) → context_window
+      - limit.output  (int) → max_output_tokens
+      - family     (str)   → model_family
+    """
+    models = _get_provider_models(provider)
+    if models is None:
+        return None
+
+    entry = _find_model_entry(models, model)
+    if entry is None:
+        return None
+
+    # Extract capability flags (default to False if missing)
+    supports_tools = bool(entry.get("tool_call", False))
+    # Vision: prefer explicit `modalities.input` when models.dev provides it.
+    # The older `attachment` flag can be stale or too broad for image routing;
+    # fall back to it only when the input modalities are absent/invalid.
+    input_mods = entry.get("modalities", {})
+    if isinstance(input_mods, dict):
+        input_mods = input_mods.get("input")
+    else:
+        input_mods = None
+    if isinstance(input_mods, list):
+        supports_vision = "image" in input_mods
+    else:
+        supports_vision = bool(entry.get("attachment", False))
+    supports_reasoning = bool(entry.get("reasoning", False))
+
+    # Extract limits
+    limit = entry.get("limit", {})
+    if not isinstance(limit, dict):
+        limit = {}
+
+    ctx = limit.get("context")
+    context_window = int(ctx) if isinstance(ctx, (int, float)) and ctx > 0 else 200000
+
+    out = limit.get("output")
+    max_output_tokens = int(out) if isinstance(out, (int, float)) and out > 0 else 8192
+
+    model_family = entry.get("family", "") or ""
+
+    return ModelCapabilities(
+        supports_tools=supports_tools,
+        supports_vision=supports_vision,
+        supports_reasoning=supports_reasoning,
+        context_window=context_window,
+        max_output_tokens=max_output_tokens,
+        model_family=model_family,
+    )
+
+
+def list_provider_models(provider: str) -> List[str]:
+    """Return all model IDs for a provider from models.dev.
+
+    Returns an empty list if the provider is unknown or has no data.
+    """
+    from hermes_cli.models import normalize_provider
+    provider = normalize_provider(provider) or provider
+    
+    models = _get_provider_models(provider)
+    if models is None:
+        return []
+    return [
+        mid for mid in models.keys()
+        if not _should_hide_from_provider_catalog(provider, mid)
+    ]
+
+
+# Patterns that indicate non-agentic or noise models (TTS, embedding,
+# dated preview snapshots, live/streaming-only, image-only).
+import re
+_NOISE_PATTERNS: re.Pattern = re.compile(
+    r"-tts\b|embedding|live-|-(preview|exp)-\d{2,4}[-_]|"
+    r"-image\b|-image-preview\b|-customtools\b",
+    re.IGNORECASE,
+)
+
+# Google's live Gemini catalogs currently include a mix of stale slugs and
+# Gemma models whose TPM quotas are too small for normal Hermes agent traffic.
+# Keep capability metadata available for direct/manual use, but hide these from
+# the Gemini model catalogs we surface in setup and model selection.
+_GOOGLE_HIDDEN_MODELS = frozenset({
+    # Low-TPM Gemma models that trip Google input-token quota walls under
+    # agent-style traffic despite advertising large context windows.
+    "gemma-4-31b-it",
+    "gemma-4-26b-it",
+    "gemma-4-26b-a4b-it",
+    "gemma-3-1b",
+    "gemma-3-1b-it",
+    "gemma-3-2b",
+    "gemma-3-2b-it",
+    "gemma-3-4b",
+    "gemma-3-4b-it",
+    "gemma-3-12b",
+    "gemma-3-12b-it",
+    "gemma-3-27b",
+    "gemma-3-27b-it",
+    # Stale/retired Google slugs that still surface through models.dev-backed
+    # Gemini selection but 404 on the current Google endpoints.
+    "gemini-1.5-flash",
+    "gemini-1.5-pro",
+    "gemini-1.5-flash-8b",
+    "gemini-2.0-flash",
+    "gemini-2.0-flash-lite",
+})
+
+
+def _should_hide_from_provider_catalog(provider: str, model_id: str) -> bool:
+    provider_lower = (provider or "").strip().lower()
+    model_lower = (model_id or "").strip().lower()
+    if provider_lower in {"gemini", "google"} and model_lower in _GOOGLE_HIDDEN_MODELS:
+        return True
+    return False
+
+
+def list_agentic_models(provider: str) -> List[str]:
+    """Return model IDs suitable for agentic use from models.dev.
+
+    Filters for tool_call=True and excludes noise (TTS, embedding,
+    dated preview snapshots, live/streaming, image-only models).
+    Returns an empty list on any failure.
+    """
+    models = _get_provider_models(provider)
+    if models is None:
+        return []
+
+    result = []
+    for mid, entry in models.items():
+        if not isinstance(entry, dict):
+            continue
+        if _should_hide_from_provider_catalog(provider, mid):
+            continue
+        if not entry.get("tool_call", False):
+            continue
+        if _NOISE_PATTERNS.search(mid):
+            continue
+        result.append(mid)
+    return result
+
+
+
+# ---------------------------------------------------------------------------
+# Rich dataclass constructors — parse raw models.dev JSON into dataclasses
+# ---------------------------------------------------------------------------
+
+def _parse_model_info(model_id: str, raw: Dict[str, Any], provider_id: str) -> ModelInfo:
+    """Convert a raw models.dev model entry dict into a ModelInfo dataclass."""
+    limit = raw.get("limit") or {}
+    if not isinstance(limit, dict):
+        limit = {}
+
+    cost = raw.get("cost") or {}
+    if not isinstance(cost, dict):
+        cost = {}
+
+    modalities = raw.get("modalities") or {}
+    if not isinstance(modalities, dict):
+        modalities = {}
+
+    input_mods = modalities.get("input") or []
+    output_mods = modalities.get("output") or []
+
+    ctx = limit.get("context")
+    ctx_int = int(ctx) if isinstance(ctx, (int, float)) and ctx > 0 else 0
+    out = limit.get("output")
+    out_int = int(out) if isinstance(out, (int, float)) and out > 0 else 0
+    inp = limit.get("input")
+    inp_int = int(inp) if isinstance(inp, (int, float)) and inp > 0 else None
+
+    return ModelInfo(
+        id=model_id,
+        name=raw.get("name", "") or model_id,
+        family=raw.get("family", "") or "",
+        provider_id=provider_id,
+        reasoning=bool(raw.get("reasoning", False)),
+        tool_call=bool(raw.get("tool_call", False)),
+        attachment=bool(raw.get("attachment", False)),
+        temperature=bool(raw.get("temperature", False)),
+        structured_output=bool(raw.get("structured_output", False)),
+        open_weights=bool(raw.get("open_weights", False)),
+        input_modalities=tuple(input_mods) if isinstance(input_mods, list) else (),
+        output_modalities=tuple(output_mods) if isinstance(output_mods, list) else (),
+        context_window=ctx_int,
+        max_output=out_int,
+        max_input=inp_int,
+        cost_input=float(cost.get("input", 0) or 0),
+        cost_output=float(cost.get("output", 0) or 0),
+        cost_cache_read=float(cost["cache_read"]) if "cache_read" in cost and cost["cache_read"] is not None else None,
+        cost_cache_write=float(cost["cache_write"]) if "cache_write" in cost and cost["cache_write"] is not None else None,
+        knowledge_cutoff=raw.get("knowledge", "") or "",
+        release_date=raw.get("release_date", "") or "",
+        status=raw.get("status", "") or "",
+        interleaved=raw.get("interleaved", False),
+    )
+
+
+def _parse_provider_info(provider_id: str, raw: Dict[str, Any]) -> ProviderInfo:
+    """Convert a raw models.dev provider entry dict into a ProviderInfo."""
+    env = raw.get("env") or []
+    models = raw.get("models") or {}
+    return ProviderInfo(
+        id=provider_id,
+        name=raw.get("name", "") or provider_id,
+        env=tuple(env) if isinstance(env, list) else (),
+        api=raw.get("api", "") or "",
+        doc=raw.get("doc", "") or "",
+        model_count=len(models) if isinstance(models, dict) else 0,
+    )
+
+
+# ---------------------------------------------------------------------------
+# Provider-level queries
+# ---------------------------------------------------------------------------
+
+def get_provider_info(provider_id: str) -> Optional[ProviderInfo]:
+    """Get full provider metadata from models.dev.
+
+    Accepts either a Hermes provider ID (e.g. "kilocode") or a models.dev
+    ID (e.g. "kilo").  Returns None if the provider is not in the catalog.
+    """
+    # Resolve Hermes ID → models.dev ID
+    mdev_id = PROVIDER_TO_MODELS_DEV.get(provider_id, provider_id)
+
+    data = fetch_models_dev()
+    raw = data.get(mdev_id)
+    if not isinstance(raw, dict):
+        return None
+
+    return _parse_provider_info(mdev_id, raw)
+
+
+# ---------------------------------------------------------------------------
+# Model-level queries (rich ModelInfo)
+# ---------------------------------------------------------------------------
+
+def get_model_info(
+    provider_id: str, model_id: str
+) -> Optional[ModelInfo]:
+    """Get full model metadata from models.dev.
+
+    Accepts Hermes or models.dev provider ID.  Tries exact match then
+    case-insensitive fallback.  Returns None if not found.
+    """
+    mdev_id = PROVIDER_TO_MODELS_DEV.get(provider_id, provider_id)
+
+    data = fetch_models_dev()
+    pdata = data.get(mdev_id)
+    if not isinstance(pdata, dict):
+        return None
+
+    models = pdata.get("models", {})
+    if not isinstance(models, dict):
+        return None
+
+    # Exact match
+    raw = models.get(model_id)
+    if isinstance(raw, dict):
+        return _parse_model_info(model_id, raw, mdev_id)
+
+    # Case-insensitive fallback
+    model_lower = model_id.lower()
+    for mid, mdata in models.items():
+        if mid.lower() == model_lower and isinstance(mdata, dict):
+            return _parse_model_info(mid, mdata, mdev_id)
+
+    return None