add models endpoint

packages/opencode/src/provider/model-detection.ts

@@ -0,0 +1,63 @@
+import z from "zod"
+import { iife } from "@/util/iife"
+import { Log } from "@/util/log"
+import { Provider } from "./provider"
+
+export namespace ProviderModelDetection {
+  export async function detect(provider: Provider.Info): Promise<string[] | undefined> {
+    const log = Log.create({ service: "provider.model-detection" })
+
+    const model = Object.values(provider.models)[0]
+    const providerNPM = model?.api?.npm ?? "@ai-sdk/openai-compatible"
+    const providerBaseURL = provider.options["baseURL"] ?? model?.api?.url ?? ""
+
+    const detectedModels = await iife(async () => {
+      try {
+        if (providerNPM === "@ai-sdk/openai-compatible" && providerBaseURL) {
+          log.info("using OpenAI-compatible method", { providerID: provider.id })
+          return await ProviderModelDetection.OpenAICompatible.listModels(providerBaseURL, provider)
+        }
+      } catch (error) {
+        log.warn(`failed to detect models\n${error}`, { providerID: provider.id })
+      }
+    })
+
+    if (!detectedModels || detectedModels.length === 0) return
+
+    log.info("detected models", { providerID: provider.id, count: detectedModels.length })
+    return detectedModels
+  }
+}
+
+export namespace ProviderModelDetection.OpenAICompatible {
+  const OpenAICompatibleResponse = z.object({
+    object: z.string(),
+    data: z.array(
+      z.object({
+        id: z.string(),
+        object: z.string().optional(),
+        created: z.number().optional(),
+        owned_by: z.string().optional(),
+      }),
+    ),
+  })
+  type OpenAICompatibleResponse = z.infer<typeof OpenAICompatibleResponse>
+
+  export async function listModels(baseURL: string, provider: Provider.Info): Promise<string[]> {
+    const fetchFn = provider.options["fetch"] ?? fetch
+    const apiKey = provider.options["apiKey"] ?? provider.key ?? ""
+    const headers = new Headers()
+    if (apiKey) headers.append("Authorization", `Bearer ${apiKey}`)
+
+    const res = await fetchFn(`${baseURL}/models`, {
+      headers,
+      signal: AbortSignal.timeout(3 * 1000),
+    })
+    if (!res.ok) throw new Error(`bad http status ${res.status}`)
+    const parsed = OpenAICompatibleResponse.parse(await res.json())
+
+    return parsed.data
+      .filter((model) => model.id && !model.id.includes("embedding") && !model.id.includes("embed"))
+      .map((model) => model.id)
+  }
+}

packages/opencode/src/provider/provider.ts

@@ -9,7 +9,7 @@ import { BunProc } from "../bun"
 import { Plugin } from "../plugin"
 import { ModelsDev } from "./models"
 import { NamedError } from "@opencode-ai/util/error"
-import { Auth } from "../auth"
+import { Auth, OAUTH_DUMMY_KEY } from "../auth"
 import { Env } from "../env"
 import { Instance } from "../project/instance"
 import { Flag } from "../flag/flag"
@@ -694,11 +694,52 @@ export namespace Provider {
       source: "custom",
       name: provider.name,
       env: provider.env ?? [],
-      options: {},
+      options: {
+        ...(provider.api && { baseURL: provider.api }),
+      },
       models: mapValues(provider.models, (model) => fromModelsDevModel(provider, model)),
     }
   }
 
+  const ModelsList = z.object({
+    object: z.string(),
+    data: z.array(
+      z
+        .object({
+          id: z.string(),
+          object: z.string().optional(),
+          created: z.number().optional(),
+          owned_by: z.string().optional(),
+        })
+        .catchall(z.any()),
+    ),
+  })
+  type ModelsList = z.infer<typeof ModelsList>
+
+  async function listModels(provider: Info) {
+    const baseURL = provider.options["baseURL"]
+    const fetchFn = (provider.options["fetch"] as typeof fetch) ?? fetch
+    const apiKey = provider.options["apiKey"] ?? provider.key ?? ""
+    const headers = new Headers()
+    if (apiKey && apiKey !== OAUTH_DUMMY_KEY) headers.append("Authorization", `Bearer ${apiKey}`)
+    const models = await fetchFn(`${baseURL}/models`, {
+      headers,
+      signal: AbortSignal.timeout(3 * 1000),
+    })
+      .then(async (resp) => {
+        if (!resp.ok) return
+        return ModelsList.parse(await resp.json())
+      })
+      .catch((err) => {
+        log.error(`Failed to fetch models from: ${baseURL}/models`, { error: err })
+      })
+    if (!models) return
+
+    return models.data
+      .filter((model) => model.id && !model.id.includes("embedding") && !model.id.includes("embed"))
+      .map((model) => model.id)
+  }
+
   const state = Instance.state(async () => {
     using _ = log.time("state")
     const config = await Config.get()
@@ -930,6 +971,20 @@ export namespace Provider {
       mergeProvider(providerID, partial)
     }
 
+    // detect models and prune invalid ones
+    await Promise.all(
+      Object.values(providers).map(async (provider) => {
+        const detected = await listModels(provider)
+        if (!detected) return
+        const detectedSet = new Set(detected)
+        for (const modelID of Object.keys(provider.models)) {
+          if (!detectedSet.has(modelID)) delete provider.models[modelID]
+        }
+        // TODO: add detected models not present in config/models.dev
+        // for (const modelID of detected) {}
+      }),
+    )
+
     for (const [providerID, provider] of Object.entries(providers)) {
       if (!isProviderAllowed(providerID)) {
         delete providers[providerID]