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import z from "zod"
import { App } from "../app/app"
import { Config } from "../config/config"
import { mergeDeep, sortBy } from "remeda"
import { NoSuchModelError, type LanguageModel, type Provider as SDK } from "ai"
import { Log } from "../util/log"
import { BunProc } from "../bun"
import { AuthAnthropic } from "../auth/anthropic"
import { AuthCopilot } from "../auth/copilot"
import { ModelsDev } from "./models"
import { NamedError } from "../util/error"
import { Auth } from "../auth"
export namespace Provider {
const log = Log.create({ service: "provider" })
type CustomLoader = (
provider: ModelsDev.Provider,
api?: string,
) => Promise<{
autoload: boolean
getModel?: (sdk: any, modelID: string) => Promise<any>
options?: Record<string, any>
}>
type Source = "env" | "config" | "custom" | "api"
const CUSTOM_LOADERS: Record<string, CustomLoader> = {
async anthropic(provider) {
const access = await AuthAnthropic.access()
if (!access) return { autoload: false }
for (const model of Object.values(provider.models)) {
model.cost = {
input: 0,
output: 0,
}
}
return {
autoload: true,
options: {
apiKey: "",
async fetch(input: any, init: any) {
const access = await AuthAnthropic.access()
const headers = {
...init.headers,
authorization: `Bearer ${access}`,
"anthropic-beta": "oauth-2025-04-20",
}
delete headers["x-api-key"]
return fetch(input, {
...init,
headers,
})
},
},
}
},
"github-copilot": async (provider) => {
const copilot = await AuthCopilot()
if (!copilot) return { autoload: false }
let info = await Auth.get("github-copilot")
if (!info || info.type !== "oauth") return { autoload: false }
if (provider && provider.models) {
for (const model of Object.values(provider.models)) {
model.cost = {
input: 0,
output: 0,
}
}
}
return {
autoload: true,
options: {
apiKey: "",
async fetch(input: any, init: any) {
const info = await Auth.get("github-copilot")
if (!info || info.type !== "oauth") return
if (!info.access || info.expires < Date.now()) {
const tokens = await copilot.access(info.refresh)
if (!tokens) throw new Error("GitHub Copilot authentication expired")
await Auth.set("github-copilot", {
type: "oauth",
...tokens,
})
info.access = tokens.access
}
let isAgentCall = false
let isVisionRequest = false
try {
const body = typeof init.body === "string" ? JSON.parse(init.body) : init.body
if (body?.messages) {
isAgentCall = body.messages.some((msg: any) => msg.role && ["tool", "assistant"].includes(msg.role))
isVisionRequest = body.messages.some(
(msg: any) =>
Array.isArray(msg.content) && msg.content.some((part: any) => part.type === "image_url"),
)
}
} catch {}
const headers: Record<string, string> = {
...init.headers,
...copilot.HEADERS,
Authorization: `Bearer ${info.access}`,
"Openai-Intent": "conversation-edits",
"X-Initiator": isAgentCall ? "agent" : "user",
}
if (isVisionRequest) {
headers["Copilot-Vision-Request"] = "true"
}
delete headers["x-api-key"]
return fetch(input, {
...init,
headers,
})
},
},
}
},
openai: async () => {
return {
autoload: false,
async getModel(sdk: any, modelID: string) {
return sdk.responses(modelID)
},
options: {},
}
},
"amazon-bedrock": async () => {
if (!process.env["AWS_PROFILE"] && !process.env["AWS_ACCESS_KEY_ID"] && !process.env["AWS_BEARER_TOKEN_BEDROCK"])
return { autoload: false }
const region = process.env["AWS_REGION"] ?? "us-east-1"
const { fromNodeProviderChain } = await import(await BunProc.install("@aws-sdk/credential-providers"))
return {
autoload: true,
options: {
region,
credentialProvider: fromNodeProviderChain(),
},
async getModel(sdk: any, modelID: string) {
let regionPrefix = region.split("-")[0]
switch (regionPrefix) {
case "us": {
const modelRequiresPrefix = ["claude", "deepseek"].some((m) => modelID.includes(m))
if (modelRequiresPrefix) {
modelID = `${regionPrefix}.${modelID}`
}
break
}
case "eu": {
const regionRequiresPrefix = [
"eu-west-1",
"eu-west-3",
"eu-north-1",
"eu-central-1",
"eu-south-1",
"eu-south-2",
].some((r) => region.includes(r))
const modelRequiresPrefix = ["claude", "nova-lite", "nova-micro", "llama3", "pixtral"].some((m) =>
modelID.includes(m),
)
if (regionRequiresPrefix && modelRequiresPrefix) {
modelID = `${regionPrefix}.${modelID}`
}
break
}
case "ap": {
const modelRequiresPrefix = ["claude", "nova-lite", "nova-micro", "nova-pro"].some((m) =>
modelID.includes(m),
)
if (modelRequiresPrefix) {
regionPrefix = "apac"
modelID = `${regionPrefix}.${modelID}`
}
break
}
}
return sdk.languageModel(modelID)
},
}
},
openrouter: async () => {
return {
autoload: false,
options: {
headers: {
"HTTP-Referer": "https://opencode.ai/",
"X-Title": "opencode",
},
},
}
},
}
const state = App.state("provider", async () => {
const config = await Config.get()
const database = await ModelsDev.get()
const providers: {
[providerID: string]: {
source: Source
info: ModelsDev.Provider
getModel?: (sdk: any, modelID: string) => Promise<any>
options: Record<string, any>
}
} = {}
const models = new Map<string, { info: ModelsDev.Model; language: LanguageModel }>()
const sdk = new Map<string, SDK>()
log.info("init")
function mergeProvider(
id: string,
options: Record<string, any>,
source: Source,
getModel?: (sdk: any, modelID: string) => Promise<any>,
) {
const provider = providers[id]
if (!provider) {
const info = database[id]
if (!info) return
if (info.api && !options["baseURL"]) options["baseURL"] = info.api
providers[id] = {
source,
info,
options,
getModel,
}
return
}
provider.options = mergeDeep(provider.options, options)
provider.source = source
provider.getModel = getModel ?? provider.getModel
}
const configProviders = Object.entries(config.provider ?? {})
for (const [providerID, provider] of configProviders) {
const existing = database[providerID]
const parsed: ModelsDev.Provider = {
id: providerID,
npm: provider.npm ?? existing?.npm,
name: provider.name ?? existing?.name ?? providerID,
env: provider.env ?? existing?.env ?? [],
api: provider.api ?? existing?.api,
models: existing?.models ?? {},
}
for (const [modelID, model] of Object.entries(provider.models ?? {})) {
const existing = parsed.models[modelID]
const parsedModel: ModelsDev.Model = {
id: modelID,
name: model.name ?? existing?.name ?? modelID,
release_date: model.release_date ?? existing?.release_date,
attachment: model.attachment ?? existing?.attachment ?? false,
reasoning: model.reasoning ?? existing?.reasoning ?? false,
temperature: model.temperature ?? existing?.temperature ?? false,
tool_call: model.tool_call ?? existing?.tool_call ?? true,
cost:
!model.cost && !existing?.cost
? {
input: 0,
output: 0,
cache_read: 0,
cache_write: 0,
}
: {
cache_read: 0,
cache_write: 0,
...existing?.cost,
...model.cost,
},
options: {
...existing?.options,
...model.options,
},
limit: model.limit ??
existing?.limit ?? {
context: 0,
output: 0,
},
}
parsed.models[modelID] = parsedModel
}
database[providerID] = parsed
}
const disabled = await Config.get().then((cfg) => new Set(cfg.disabled_providers ?? []))
// load env
for (const [providerID, provider] of Object.entries(database)) {
if (disabled.has(providerID)) continue
const apiKey = provider.env.map((item) => process.env[item]).at(0)
if (!apiKey) continue
mergeProvider(
providerID,
// only include apiKey if there's only one potential option
provider.env.length === 1 ? { apiKey } : {},
"env",
)
}
// load apikeys
for (const [providerID, provider] of Object.entries(await Auth.all())) {
if (disabled.has(providerID)) continue
if (provider.type === "api") {
mergeProvider(providerID, { apiKey: provider.key }, "api")
}
}
// load custom
for (const [providerID, fn] of Object.entries(CUSTOM_LOADERS)) {
if (disabled.has(providerID)) continue
const result = await fn(database[providerID])
if (result && (result.autoload || providers[providerID])) {
mergeProvider(providerID, result.options ?? {}, "custom", result.getModel)
}
}
// load config
for (const [providerID, provider] of configProviders) {
mergeProvider(providerID, provider.options ?? {}, "config")
}
for (const [providerID, provider] of Object.entries(providers)) {
if (Object.keys(provider.info.models).length === 0) {
delete providers[providerID]
continue
}
log.info("found", { providerID })
}
return {
models,
providers,
sdk,
}
})
export async function list() {
return state().then((state) => state.providers)
}
async function getSDK(provider: ModelsDev.Provider) {
return (async () => {
using _ = log.time("getSDK", {
providerID: provider.id,
})
const s = await state()
const existing = s.sdk.get(provider.id)
if (existing) return existing
const pkg = provider.npm ?? provider.id
const mod = await import(await BunProc.install(pkg, "beta"))
const fn = mod[Object.keys(mod).find((key) => key.startsWith("create"))!]
const loaded = fn({
name: provider.id,
...s.providers[provider.id]?.options,
})
s.sdk.set(provider.id, loaded)
return loaded as SDK
})().catch((e) => {
throw new InitError({ providerID: provider.id }, { cause: e })
})
}
export async function getModel(providerID: string, modelID: string) {
const key = `${providerID}/${modelID}`
const s = await state()
if (s.models.has(key)) return s.models.get(key)!
log.info("getModel", {
providerID,
modelID,
})
const provider = s.providers[providerID]
if (!provider) throw new ModelNotFoundError({ providerID, modelID })
const info = provider.info.models[modelID]
if (!info) throw new ModelNotFoundError({ providerID, modelID })
const sdk = await getSDK(provider.info)
try {
const language = provider.getModel ? await provider.getModel(sdk, modelID) : sdk.languageModel(modelID)
log.info("found", { providerID, modelID })
s.models.set(key, {
info,
language,
})
return {
info,
language,
}
} catch (e) {
if (e instanceof NoSuchModelError)
throw new ModelNotFoundError(
{
modelID: modelID,
providerID,
},
{ cause: e },
)
throw e
}
}
export async function getSmallModel(providerID: string) {
const cfg = await Config.get()
if (cfg.small_model) {
const parsed = parseModel(cfg.small_model)
return getModel(parsed.providerID, parsed.modelID)
}
const provider = await state().then((state) => state.providers[providerID])
if (!provider) return
const priority = ["3-5-haiku", "3.5-haiku", "gemini-2.5-flash"]
for (const item of priority) {
for (const model of Object.keys(provider.info.models)) {
if (model.includes(item)) return getModel(providerID, model)
}
}
}
const priority = ["gemini-2.5-pro-preview", "codex-mini", "claude-sonnet-4"]
export function sort(models: ModelsDev.Model[]) {
return sortBy(
models,
[(model) => priority.findIndex((filter) => model.id.includes(filter)), "desc"],
[(model) => (model.id.includes("latest") ? 0 : 1), "asc"],
[(model) => model.id, "desc"],
)
}
export async function defaultModel() {
const cfg = await Config.get()
if (cfg.model) return parseModel(cfg.model)
const provider = await list()
.then((val) => Object.values(val))
.then((x) => x.find((p) => !cfg.provider || Object.keys(cfg.provider).includes(p.info.id)))
if (!provider) throw new Error("no providers found")
const [model] = sort(Object.values(provider.info.models))
if (!model) throw new Error("no models found")
return {
providerID: provider.info.id,
modelID: model.id,
}
}
export function parseModel(model: string) {
const [providerID, ...rest] = model.split("/")
return {
providerID: providerID,
modelID: rest.join("/"),
}
}
export const ModelNotFoundError = NamedError.create(
"ProviderModelNotFoundError",
z.object({
providerID: z.string(),
modelID: z.string(),
}),
)
export const InitError = NamedError.create(
"ProviderInitError",
z.object({
providerID: z.string(),
}),
)
}