Files
routstr-core/routstr/upstream/model_paths.py
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2026-08-02 23:16:01 +02:00

820 lines
30 KiB
Python

"""Model-path discovery service.
Exposes every selectable upstream route a Routstr model is reachable through.
This PR remains discovery-only: request-side routing will consume the opaque
selectors in a follow-up.
A path is a standard percent-encoded query string containing the configured
upstream URL, provider ID, client-visible model ID and, for an exact OpenRouter
endpoint, its machine-readable tag::
url=https%3A%2F%2Fapi.anthropic.com%2Fv1&provider-id=12&model-id=claude-sonnet-4
url=https%3A%2F%2Fopenrouter.ai%2Fapi%2Fv1&provider-id=42&model-id=claude-sonnet-4&endpoint=google-vertex%2Fus
"""
from __future__ import annotations
import asyncio
import ipaddress
import random
import time
from dataclasses import dataclass
from typing import TYPE_CHECKING, Any, Callable
from urllib.parse import urlencode, urlsplit
import httpx
from sqlalchemy.dialects.sqlite import insert
from sqlalchemy.orm import selectinload
from sqlmodel import col, delete, select
from ..core.db import ModelPathRow, ModelRow, UpstreamProviderRow, create_session
from ..core.logging import get_logger
if TYPE_CHECKING:
from sqlmodel.ext.asyncio.session import AsyncSession
from .base import BaseUpstreamProvider
logger = get_logger(__name__)
# Bound the per-model OpenRouter /endpoints fan-out so a provider with hundreds
# of models does not open hundreds of concurrent requests every refresh.
_OPENROUTER_CONCURRENCY = 5
_OPENROUTER_TIMEOUT_SECONDS = 10.0
# Rows inserted per statement during persist. Keeps each INSERT bounded while
# avoiding per-row round-trips that hold SQLite's write lock for ~1s per cycle.
_PERSIST_CHUNK_SIZE = 500
# Admin mutations enqueue provider IDs here instead of running OpenRouter's
# per-model endpoint fan-out inside the request. One worker serializes refreshes
# and coalesces repeated mutations for the same provider.
_scheduled_provider_refresh_ids: set[int] = set()
_scheduled_provider_refresh_task: asyncio.Task[None] | None = None
# Visibility key used across this module: routing carries the provider
# dimension everywhere (ModelRow's primary key is (id, upstream_provider_id)),
# so all model-id keyed maps here do too, lowercased like proxy.refresh_model_maps.
ModelKey = tuple[str, int]
@dataclass(frozen=True)
class EndpointIdentity:
"""Exact OpenRouter endpoint identity returned by ``/endpoints``."""
tag: str
provider_name: str | None
@dataclass(frozen=True)
class ConfiguredProviderIdentity:
"""Public identity of one configured upstream provider."""
id: int
slug: str
provider_type: str
base_url: str
@dataclass(frozen=True)
class DiscoveredPath:
"""One model route ready for persistence and API serialization."""
model_id: str
path: str
provider: ConfiguredProviderIdentity
endpoint_tag: str | None = None
endpoint_name: str | None = None
@dataclass(frozen=True)
class ProviderPathSnapshot:
"""Refresh result plus model IDs whose prior rows must survive degradation."""
paths: tuple[DiscoveredPath, ...]
preserve_model_ids: frozenset[str] = frozenset()
def public_provider_url(base_url: str) -> str:
"""Mask private IP addresses and URLs with explicit ports."""
parsed = urlsplit(base_url)
try:
if parsed.port is not None:
return "http://localhost"
except ValueError:
# An invalid explicit port must not accidentally leak through.
return "http://localhost"
hostname = parsed.hostname
if hostname is None:
return base_url
try:
address = ipaddress.ip_address(hostname)
except ValueError:
return base_url
return "http://localhost" if address.is_private else base_url
def encode_model_path(
base_url: str,
provider_id: int,
model_id: str,
endpoint_tag: str | None = None,
) -> str:
"""Encode the complete upstream route selector advertised to clients."""
components: list[tuple[str, str | int]] = [
("url", base_url),
("provider-id", provider_id),
("model-id", model_id),
]
if endpoint_tag:
components.append(("endpoint", endpoint_tag))
return urlencode(components)
def _make_http_client() -> httpx.AsyncClient:
"""Client factory, separated so tests can substitute a mock transport."""
return httpx.AsyncClient()
def is_openrouter_base_url(base_url: str | None) -> bool:
"""True when ``base_url`` points at OpenRouter.
Deliberately separate from ``BaseUpstreamProvider._upstream_accepts_cache_control``:
that predicate also returns True for native Anthropic (correct for
cache-control, wrong for OpenRouter endpoint discovery). This one keys only
on the URL so a ``GenericUpstreamProvider`` aimed at OpenRouter is matched
while native Anthropic is not.
"""
return "openrouter.ai" in (base_url or "")
def exposed_model_id(model: object) -> str:
"""Return exactly the ID advertised by ``/v1/models``.
A forwarded ID is already a public routable alias and must remain intact,
including any slash. Without one, ``/v1/models`` exposes the base ID.
"""
forwarded = getattr(model, "forwarded_model_id", None)
if forwarded:
return forwarded
return public_model_id(getattr(model, "id"))
def public_model_id(model_id: str) -> str:
"""Model id exposed by model-path API responses.
Uses the same rule as ``create_model_mappings.get_base_model_id`` and
``resolve_model_alias`` — strip everything before the *first* slash — so
the id shown here can be sent back to ``/v1/chat/completions`` verbatim.
"""
return model_id.split("/", 1)[1] if "/" in model_id else model_id
def openrouter_author_slug(model: object) -> str | None:
"""Return a canonical ``author/slug`` for the OpenRouter endpoints API.
Prefer ``canonical_slug``, then a slash-containing ``id``, then a
slash-containing ``forwarded_model_id``. The forwarded id is exactly what
the proxy sends upstream for admin-created alias rows (``base.py`` forwards
``forwarded_model_id or id``), so it is a valid OpenRouter id when the
bare ``id`` is a local alias with no slash.
"""
canonical = getattr(model, "canonical_slug", None)
if canonical and "/" in canonical:
return canonical
model_id = getattr(model, "id", None)
if model_id and "/" in model_id:
return model_id
forwarded = getattr(model, "forwarded_model_id", None)
if forwarded and "/" in forwarded:
return forwarded
return None
class _RefreshCycleState:
"""Per-refresh shared state: fetch dedupe cache and rate-limit latch.
``endpoint_cache`` dedupes byte-identical ``/endpoints`` fetches when two
providers point at the same OpenRouter base URL. ``rate_limited`` latches
on the first 429 so the rest of the cycle stops hammering a throttled API;
the whole provider result then degrades to "unknown" instead of an empty
list, which preserves previously persisted rows.
"""
def __init__(self) -> None:
self.endpoint_cache: dict[tuple[str, str], list[EndpointIdentity] | None] = {}
self.rate_limited = False
async def _fetch_openrouter_endpoint_subproviders(
client: httpx.AsyncClient,
base_url: str,
api_key: str,
author_slug: str,
semaphore: asyncio.Semaphore,
cycle: _RefreshCycleState,
) -> list[EndpointIdentity] | None:
"""Return exact endpoint identities for one model, or ``None`` when unknown.
``None`` (not ``[]``) signals a degraded fetch — network failure, rate
limit, non-200, or an unparseable payload — so callers can distinguish
"this model has no endpoints" from "we could not find out". Failures are
logged and swallowed so one model never breaks the whole refresh.
"""
cache_key = (base_url, author_slug)
if cache_key in cycle.endpoint_cache:
return cycle.endpoint_cache[cache_key]
if cycle.rate_limited:
return None
url = f"{base_url.rstrip('/')}/models/{author_slug}/endpoints"
headers = {"Authorization": f"Bearer {api_key}"} if api_key else {}
result: list[EndpointIdentity] | None
async with semaphore:
try:
resp = await client.get(
url, headers=headers, timeout=_OPENROUTER_TIMEOUT_SECONDS
)
except Exception as e: # noqa: BLE001 - isolate per-model failures
logger.warning(
"OpenRouter endpoint discovery request failed",
extra={"author_slug": author_slug, "error": str(e)},
)
cycle.endpoint_cache[cache_key] = None
return None
if resp.status_code == 429:
logger.warning(
"OpenRouter endpoint discovery rate-limited; aborting cycle",
extra={"author_slug": author_slug},
)
cycle.rate_limited = True
cycle.endpoint_cache[cache_key] = None
return None
if resp.status_code != 200:
logger.warning(
"OpenRouter endpoint discovery non-200",
extra={"author_slug": author_slug, "status_code": resp.status_code},
)
cycle.endpoint_cache[cache_key] = None
return None
try:
payload = resp.json()
data = payload.get("data") if isinstance(payload, dict) else None
endpoints = data.get("endpoints") if isinstance(data, dict) else None
if not isinstance(endpoints, list):
raise ValueError("endpoints must be a list")
identities: dict[str, EndpointIdentity] = {}
for endpoint in endpoints:
if not isinstance(endpoint, dict):
continue
tag = endpoint.get("tag")
if not isinstance(tag, str) or not tag.strip():
continue
provider_name = endpoint.get("provider_name")
identities.setdefault(
tag,
EndpointIdentity(
tag=tag,
provider_name=provider_name
if isinstance(provider_name, str) and provider_name
else None,
),
)
if endpoints and not identities:
raise ValueError("endpoints contain no usable tags")
result = list(identities.values())
except Exception as e: # noqa: BLE001
logger.warning(
"OpenRouter endpoint discovery bad payload",
extra={"author_slug": author_slug, "error": str(e)},
)
result = None
cycle.endpoint_cache[cache_key] = result
return result
async def _load_model_visibility() -> tuple[
dict[ModelKey, ModelRow],
set[ModelKey],
dict[int, ConfiguredProviderIdentity],
]:
"""Load the same DB model visibility inputs used by routing.
``refresh_model_maps`` builds routing from enabled providers, enabled DB
override rows, and disabled model keys — all keyed on
``(model_id.lower(), upstream_provider_id)`` because ``ModelRow``'s primary
key is composite and the same id legitimately exists on several providers.
Model-path discovery uses the same keying so disabling a model on one
provider never hides it on another, and one provider's
``forwarded_model_id`` alias is never applied to a different provider.
"""
async with create_session() as session:
query = select(UpstreamProviderRow).options(
selectinload(UpstreamProviderRow.models) # type: ignore[arg-type]
)
provider_rows = (await session.exec(query)).all()
overrides_by_key: dict[ModelKey, ModelRow] = {}
disabled_model_keys: set[ModelKey] = set()
provider_identities: dict[int, ConfiguredProviderIdentity] = {}
for provider in provider_rows:
if not provider.enabled or provider.id is None:
continue
provider_identities[provider.id] = ConfiguredProviderIdentity(
id=provider.id,
slug=provider.slug or f"provider-{provider.id}",
provider_type=provider.provider_type,
base_url=public_provider_url(provider.base_url),
)
for model in provider.models:
key = (model.id.lower(), provider.id)
if model.enabled:
overrides_by_key[key] = model
else:
disabled_model_keys.add(key)
return overrides_by_key, disabled_model_keys, provider_identities
def _apply_model_visibility(
upstream: BaseUpstreamProvider,
overrides_by_key: dict[ModelKey, ModelRow] | None,
disabled_model_keys: set[ModelKey] | None,
) -> list[object]:
"""Return provider models after DB disabled/override state is applied.
Only the identity fields (``id``, ``forwarded_model_id``,
``canonical_slug``) matter for path discovery, so DB override rows are used
directly rather than rebuilt into fully priced ``Model`` objects — the
pricing pipeline costs ~0.7ms of event-loop CPU per row for data this
module immediately discards.
"""
overrides_by_key = overrides_by_key or {}
disabled_model_keys = disabled_model_keys or set()
upstream_provider_id = getattr(upstream, "db_id", None)
if not isinstance(upstream_provider_id, int):
return [
model
for model in upstream.get_cached_models()
if getattr(model, "enabled", True)
]
visible_models: list[object] = []
seen_model_ids: set[str] = set()
for model in upstream.get_cached_models():
model_id = getattr(model, "id", "")
key = (model_id.lower(), upstream_provider_id)
if not getattr(model, "enabled", True) or key in disabled_model_keys:
continue
# Apply overrides only for this provider's own model row.
override_row = overrides_by_key.get(key)
visible: object = model if override_row is None else override_row
visible_models.append(visible)
seen_model_ids.add(model_id.lower())
# DB-only override rows for this provider with no cached counterpart.
for (model_id_lower, provider_id), override_row in overrides_by_key.items():
if provider_id != upstream_provider_id:
continue
if model_id_lower in seen_model_ids:
continue
visible_models.append(override_row)
seen_model_ids.add(model_id_lower)
return visible_models
async def _collect_provider_paths(
upstream: BaseUpstreamProvider,
provider_identity: ConfiguredProviderIdentity,
overrides_by_key: dict[ModelKey, ModelRow] | None = None,
disabled_model_keys: set[ModelKey] | None = None,
cycle: _RefreshCycleState | None = None,
) -> ProviderPathSnapshot:
"""Collect selectable routes while marking model-level degraded fetches.
A failed OpenRouter lookup preserves only that model's prior rows. Other
models in the same provider still refresh, so a partial outage cannot erase
valid discovery data or freeze the entire provider snapshot.
"""
cycle = cycle or _RefreshCycleState()
models = _apply_model_visibility(upstream, overrides_by_key, disabled_model_keys)
def _base_path(model: object) -> DiscoveredPath:
model_id = exposed_model_id(model)
return DiscoveredPath(
model_id=model_id,
path=encode_model_path(
provider_identity.base_url, provider_identity.id, model_id
),
provider=provider_identity,
)
if not is_openrouter_base_url(upstream.base_url):
return ProviderPathSnapshot(paths=tuple(_base_path(model) for model in models))
if not (upstream.provider_type or "").strip():
return ProviderPathSnapshot(paths=())
semaphore = asyncio.Semaphore(_OPENROUTER_CONCURRENCY)
async with _make_http_client() as client:
async def _for_model(
model: object,
) -> tuple[list[DiscoveredPath], str | None]:
model_id = exposed_model_id(model)
author_slug = openrouter_author_slug(model)
if not author_slug:
return [_base_path(model)], None
endpoints = await _fetch_openrouter_endpoint_subproviders(
client,
upstream.base_url,
upstream.api_key,
author_slug,
semaphore,
cycle,
)
if endpoints is None:
return [], model_id
paths = [_base_path(model)]
paths.extend(
DiscoveredPath(
model_id=model_id,
path=encode_model_path(
provider_identity.base_url,
provider_identity.id,
model_id,
endpoint.tag,
),
provider=provider_identity,
endpoint_tag=endpoint.tag,
endpoint_name=endpoint.provider_name,
)
for endpoint in endpoints
)
return paths, None
results = await asyncio.gather(
*(_for_model(model) for model in models), return_exceptions=True
)
paths: list[DiscoveredPath] = []
preserve_model_ids: set[str] = set()
for model, result in zip(models, results):
if isinstance(result, BaseException):
model_id = exposed_model_id(model)
preserve_model_ids.add(model_id)
logger.warning(
"OpenRouter endpoint discovery task errored",
extra={"provider": upstream.provider_type, "error": str(result)},
)
continue
model_paths, preserved_model_id = result
paths.extend(model_paths)
if preserved_model_id:
preserve_model_ids.add(preserved_model_id)
return ProviderPathSnapshot(
paths=tuple(paths), preserve_model_ids=frozenset(preserve_model_ids)
)
async def _persist_provider_paths(
upstream_provider_id: int, snapshot: ProviderPathSnapshot
) -> None:
"""Replace refreshed rows while retaining model-level degraded snapshots."""
unique_paths = list(
{(path.model_id, path.path): path for path in snapshot.paths}.values()
)
now = int(time.time())
async with create_session() as session:
delete_stmt = delete(ModelPathRow).where(
col(ModelPathRow.upstream_provider_id) == upstream_provider_id
)
if snapshot.preserve_model_ids:
delete_stmt = delete_stmt.where(
col(ModelPathRow.model_id).not_in(sorted(snapshot.preserve_model_ids))
)
await session.exec(delete_stmt) # type: ignore[call-overload]
for start in range(0, len(unique_paths), _PERSIST_CHUNK_SIZE):
chunk = unique_paths[start : start + _PERSIST_CHUNK_SIZE]
values = [
{
"model_id": discovered.model_id,
"path": discovered.path,
"provider_slug": discovered.provider.slug,
"provider_type": discovered.provider.provider_type,
"endpoint_tag": discovered.endpoint_tag,
"endpoint_name": discovered.endpoint_name,
"upstream_provider_id": upstream_provider_id,
"updated_at": now,
}
for discovered in chunk
]
insert_stmt = insert(ModelPathRow).values(values)
await session.execute(
insert_stmt.on_conflict_do_update(
index_elements=["model_id", "path", "upstream_provider_id"],
set_={
"provider_slug": insert_stmt.excluded.provider_slug,
"provider_type": insert_stmt.excluded.provider_type,
"endpoint_tag": insert_stmt.excluded.endpoint_tag,
"endpoint_name": insert_stmt.excluded.endpoint_name,
"updated_at": insert_stmt.excluded.updated_at,
},
)
)
await session.commit()
async def prune_model_paths_for_inactive_providers() -> None:
"""Delete paths whose provider is no longer enabled in the database.
Called from ``refresh_model_maps`` so admin mutations (disable/delete
provider) stop advertising a provider's paths immediately instead of
waiting for the next timed refresh. Uses the DB as the source of truth, so
it is safe at boot even before upstreams initialize.
"""
async with create_session() as session:
enabled_ids = (
await session.exec(
select(UpstreamProviderRow.id).where(
col(UpstreamProviderRow.enabled).is_(True)
)
)
).all()
stmt = delete(ModelPathRow)
if enabled_ids:
stmt = stmt.where(
col(ModelPathRow.upstream_provider_id).not_in(
[pid for pid in enabled_ids if pid is not None]
)
)
await session.exec(stmt) # type: ignore[call-overload]
await session.commit()
async def refresh_model_paths(
upstreams: list[BaseUpstreamProvider],
) -> None:
"""Recompute and persist model paths for every enabled provider.
One provider's failure is logged and isolated; it must not break the rest.
A provider whose paths could not be determined this cycle keeps its
previously persisted rows. An empty ``upstreams`` list (e.g. a failed
``initialize_upstreams`` at boot) is treated as "unknown" and touches
nothing.
"""
if not upstreams:
logger.warning("Skipping model paths refresh: no live upstreams")
return
(
overrides_by_key,
disabled_model_keys,
provider_identities,
) = await _load_model_visibility()
await prune_model_paths_for_inactive_providers()
cycle = _RefreshCycleState()
for upstream in upstreams:
if upstream.db_id is None or upstream.db_id not in provider_identities:
continue
try:
snapshot = await _collect_provider_paths(
upstream,
provider_identity=provider_identities[upstream.db_id],
overrides_by_key=overrides_by_key,
disabled_model_keys=disabled_model_keys,
cycle=cycle,
)
if snapshot.preserve_model_ids:
logger.warning(
"Some model paths are unknown; keeping their previous rows",
extra={
"provider": upstream.provider_type or upstream.base_url,
"db_id": upstream.db_id,
"preserved_models": len(snapshot.preserve_model_ids),
},
)
await _persist_provider_paths(upstream.db_id, snapshot)
except Exception as e: # noqa: BLE001 - isolate per-provider failures
logger.error(
"Failed to refresh model paths for provider",
extra={
"provider": upstream.provider_type or upstream.base_url,
"db_id": upstream.db_id,
"error": str(e),
"error_type": type(e).__name__,
},
)
async def refresh_model_paths_for_provider(upstream_provider_id: int) -> None:
"""Synchronize one provider when model-path discovery is enabled."""
if _refresh_interval_seconds() <= 0:
return
from ..proxy import get_upstreams
matching = [
upstream
for upstream in get_upstreams()
if upstream.db_id == upstream_provider_id
]
if matching:
await refresh_model_paths(matching)
else:
await prune_model_paths_for_inactive_providers()
async def _drain_scheduled_provider_refreshes() -> None:
"""Serialize and coalesce model-path refreshes scheduled by admin writes."""
global _scheduled_provider_refresh_task
try:
# Let mutations in the same event-loop turn collapse into one refresh.
await asyncio.sleep(0)
while _scheduled_provider_refresh_ids:
if _refresh_interval_seconds() <= 0:
_scheduled_provider_refresh_ids.clear()
return
provider_id = min(_scheduled_provider_refresh_ids)
_scheduled_provider_refresh_ids.remove(provider_id)
try:
await refresh_model_paths_for_provider(provider_id)
except asyncio.CancelledError:
raise
except Exception as exc: # noqa: BLE001 - background best effort
logger.warning(
"Failed to refresh model paths after admin mutation",
extra={
"upstream_provider_id": provider_id,
"error": str(exc),
"error_type": type(exc).__name__,
},
)
finally:
_scheduled_provider_refresh_task = None
async def schedule_model_paths_refresh_for_provider(
upstream_provider_id: int,
) -> None:
"""Queue a non-blocking, coalesced refresh after an admin mutation."""
global _scheduled_provider_refresh_task
if _refresh_interval_seconds() <= 0:
return
_scheduled_provider_refresh_ids.add(upstream_provider_id)
if (
_scheduled_provider_refresh_task is None
or _scheduled_provider_refresh_task.done()
):
_scheduled_provider_refresh_task = asyncio.create_task(
_drain_scheduled_provider_refreshes(),
name="model-path-admin-refresh",
)
def _refresh_interval_seconds() -> int:
"""Current interval, re-read every loop so runtime setting changes apply."""
from ..core.settings import settings
if not getattr(settings, "enable_model_paths_refresh", True):
return 0
return int(getattr(settings, "model_paths_refresh_interval_seconds", 0) or 0)
async def refresh_model_paths_periodically(
upstreams_provider: (
Callable[[], list[BaseUpstreamProvider]] | list[BaseUpstreamProvider]
),
) -> None:
"""Background task mirroring ``refresh_upstreams_models_periodically``.
The interval and enable flag are re-read every iteration, so the refresh
can be turned off (or on) and retuned without a restart. While disabled the
task idles instead of exiting, so re-enabling takes effect.
"""
_DISABLED_POLL_SECONDS = 60.0
def _resolve_upstreams() -> list[BaseUpstreamProvider]:
if callable(upstreams_provider):
return upstreams_provider()
return upstreams_provider
while True:
interval = _refresh_interval_seconds()
if interval <= 0:
try:
await asyncio.sleep(_DISABLED_POLL_SECONDS)
except asyncio.CancelledError:
break
continue
try:
await refresh_model_paths(_resolve_upstreams())
except asyncio.CancelledError:
break
except Exception as e: # noqa: BLE001
logger.error(
"Error in model paths refresh loop",
extra={"error": str(e), "error_type": type(e).__name__},
)
try:
jitter = max(0.0, float(interval) * 0.1)
await asyncio.sleep(interval + random.uniform(0, jitter))
except asyncio.CancelledError:
break
def _serialize_path(row: ModelPathRow) -> dict[str, Any]:
endpoint = None
if row.endpoint_tag or row.endpoint_name:
endpoint = {"tag": row.endpoint_tag, "name": row.endpoint_name}
return {
"path": row.path,
"provider": {
"id": row.upstream_provider_id,
"slug": row.provider_slug,
"type": row.provider_type,
},
"endpoint": endpoint,
}
async def get_all_model_paths() -> dict:
"""All models with their exact selectable routes."""
async with create_session() as session:
rows = (
await session.exec(
select(ModelPathRow).order_by(
col(ModelPathRow.model_id),
col(ModelPathRow.path),
col(ModelPathRow.upstream_provider_id),
)
)
).all()
grouped: dict[str, list[dict[str, Any]]] = {}
seen_paths: dict[str, set[str]] = {}
updated_at = 0
for row in rows:
updated_at = max(updated_at, row.updated_at)
if row.path in seen_paths.setdefault(row.model_id, set()):
continue
seen_paths[row.model_id].add(row.path)
grouped.setdefault(row.model_id, []).append(_serialize_path(row))
data = [
{
"id": grouped_model_id,
"paths": grouped[grouped_model_id],
}
for grouped_model_id in sorted(grouped)
]
return {"data": data, "updated_at": updated_at or None}
async def get_paths_for_model(model_id: str) -> dict:
"""Return paths for an advertised ID or its provider-prefixed alias."""
async def load_rows(session: AsyncSession, lookup_id: str) -> list[ModelPathRow]:
return list(
(
await session.exec(
select(ModelPathRow)
.where(col(ModelPathRow.model_id) == lookup_id)
.order_by(
col(ModelPathRow.path),
col(ModelPathRow.upstream_provider_id),
)
)
).all()
)
async with create_session() as session:
rows = await load_rows(session, model_id)
if not rows:
unprefixed_id = public_model_id(model_id)
if unprefixed_id != model_id:
rows = await load_rows(session, unprefixed_id)
seen: set[str] = set()
paths: list[dict] = []
updated_at = 0
for row in rows:
updated_at = max(updated_at, row.updated_at)
if row.path in seen:
continue
seen.add(row.path)
paths.append(_serialize_path(row))
return {"data": paths, "updated_at": updated_at or None}