72 lines
2.5 KiB
JavaScript
72 lines
2.5 KiB
JavaScript
 
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// Read side of the model catalog synced from models.dev.
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//
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// The file is the source of truth; the only thing held in memory is a parsed
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// copy dropped as soon as the file's mtime changes. getCapabilitiesForModel is
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// synchronous and runs per request, so the hot path is one stat (~1us) and the
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// parse (~0.1ms on a ~18KB file) only reruns after a sync.
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import fs from "node:fs";
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import path from "node:path";
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import { DATA_DIR } from "@/lib/dataDir.js";
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export const CATALOG_FILE = path.join(DATA_DIR, "model-catalog.json");
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// Trimmed upstream catalog, read by the add-models skill (not by the router).
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export const CATALOG_RAW_FILE = path.join(DATA_DIR, "model-catalog-raw.json");
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const EMPTY = { models: {}, providers: {} };
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let cache = EMPTY;
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let cachedMtime = -1;
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// "zai-org/GLM-4.6V:free" -> "glm-4.6v"
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function baseId(model) {
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if (!model) return "";
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const withoutVendor = model.includes("/") ? model.split("/").pop() : model;
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return withoutVendor.toLowerCase().split(":")[0];
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}
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function load() {
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let mtime;
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try {
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mtime = fs.statSync(CATALOG_FILE).mtimeMs;
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} catch {
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cache = EMPTY;
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cachedMtime = -1;
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return cache;
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}
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if (mtime === cachedMtime) return cache;
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cachedMtime = mtime;
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try {
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const parsed = JSON.parse(fs.readFileSync(CATALOG_FILE, "utf8"));
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cache = { models: parsed?.models || {}, providers: parsed?.providers || {} };
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} catch {
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cache = EMPTY;
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}
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return cache;
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}
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// Modality is a property of the model itself — any gateway serving it inherits
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// the same image/video/pdf support, so this is keyed by model id alone.
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export function getCatalogModalities(model) {
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return load().models[baseId(model)] || null;
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}
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// Context and output limits are a property of the gateway, not the model: each
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// one truncates differently, so these stay keyed by provider + model.
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export function getCatalogLimits(provider, model) {
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const byProvider = provider && load().providers[provider];
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if (!byProvider) return null;
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return byProvider[model] || byProvider[baseId(model)] || null;
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}
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// Force a re-read on the next lookup (called right after a sync writes the file).
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export function invalidateCatalog() {
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cachedMtime = -1;
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}
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// Hand the reader to capabilities.js. That module is bundled into the browser
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// too, so it cannot import this file directly — the server pushes it in.
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export async function installCatalogSource() {
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const { setCatalogSource } = await import("./capabilities.js");
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setCatalogSource({ getModalities: getCatalogModalities, getLimits: getCatalogLimits });
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}
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