feat(app): custom provider

3 files changed, 510 insertions, 7 deletions

diff --git a/packages/app/src/components/dialog-custom-provider.tsx b/packages/app/src/components/dialog-custom-provider.tsx
new file mode 100644
index 000000000..6a6a69734
--- /dev/null
+++ b/packages/app/src/components/dialog-custom-provider.tsx
@@ -0,0 +1,418 @@
+import { Button } from "@opencode-ai/ui/button"
+import { useDialog } from "@opencode-ai/ui/context/dialog"
+import { Dialog } from "@opencode-ai/ui/dialog"
+import { IconButton } from "@opencode-ai/ui/icon-button"
+import { ProviderIcon } from "@opencode-ai/ui/provider-icon"
+import { TextField } from "@opencode-ai/ui/text-field"
+import { showToast } from "@opencode-ai/ui/toast"
+import { For } from "solid-js"
+import { createStore, produce } from "solid-js/store"
+import { Link } from "@/components/link"
+import { useGlobalSync } from "@/context/global-sync"
+import { useLanguage } from "@/context/language"
+import { DialogSelectProvider } from "./dialog-select-provider"
+
+const PROVIDER_ID = /^[a-z0-9][a-z0-9-_]*$/
+const OPENAI_COMPATIBLE = "@ai-sdk/openai-compatible"
+
+type Props = {
+  back?: "providers" | "close"
+}
+
+export function DialogCustomProvider(props: Props) {
+  const dialog = useDialog()
+  const globalSync = useGlobalSync()
+  const language = useLanguage()
+
+  const [form, setForm] = createStore({
+    providerID: "",
+    name: "",
+    baseURL: "",
+    apiKey: "",
+    models: [{ id: "", name: "" }],
+    headers: [{ key: "", value: "" }],
+    saving: false,
+  })
+
+  const [errors, setErrors] = createStore({
+    providerID: undefined as string | undefined,
+    name: undefined as string | undefined,
+    baseURL: undefined as string | undefined,
+    models: [{} as { id?: string; name?: string }],
+    headers: [{} as { key?: string; value?: string }],
+  })
+
+  const goBack = () => {
+    if (props.back === "close") {
+      dialog.close()
+      return
+    }
+    dialog.show(() => <DialogSelectProvider />)
+  }
+
+  const addModel = () => {
+    setForm(
+      "models",
+      produce((draft) => {
+        draft.push({ id: "", name: "" })
+      }),
+    )
+    setErrors(
+      "models",
+      produce((draft) => {
+        draft.push({})
+      }),
+    )
+  }
+
+  const removeModel = (index: number) => {
+    if (form.models.length <= 1) return
+    setForm(
+      "models",
+      produce((draft) => {
+        draft.splice(index, 1)
+      }),
+    )
+    setErrors(
+      "models",
+      produce((draft) => {
+        draft.splice(index, 1)
+      }),
+    )
+  }
+
+  const addHeader = () => {
+    setForm(
+      "headers",
+      produce((draft) => {
+        draft.push({ key: "", value: "" })
+      }),
+    )
+    setErrors(
+      "headers",
+      produce((draft) => {
+        draft.push({})
+      }),
+    )
+  }
+
+  const removeHeader = (index: number) => {
+    if (form.headers.length <= 1) return
+    setForm(
+      "headers",
+      produce((draft) => {
+        draft.splice(index, 1)
+      }),
+    )
+    setErrors(
+      "headers",
+      produce((draft) => {
+        draft.splice(index, 1)
+      }),
+    )
+  }
+
+  const validate = () => {
+    const providerID = form.providerID.trim()
+    const name = form.name.trim()
+    const baseURL = form.baseURL.trim()
+    const apiKey = form.apiKey.trim()
+
+    const idError = !providerID
+      ? "Provider ID is required"
+      : !PROVIDER_ID.test(providerID)
+        ? "Use lowercase letters, numbers, hyphens, or underscores"
+        : undefined
+
+    const nameError = !name ? "Display name is required" : undefined
+    const urlError = !baseURL
+      ? "Base URL is required"
+      : !/^https?:\/\//.test(baseURL)
+        ? "Must start with http:// or https://"
+        : undefined
+
+    const disabled = (globalSync.data.config.disabled_providers ?? []).includes(providerID)
+    const existingProvider = globalSync.data.provider.all.find((p) => p.id === providerID)
+    const existsError = idError
+      ? undefined
+      : existingProvider && !disabled
+        ? "That provider ID already exists"
+        : undefined
+
+    const seenModels = new Set<string>()
+    const modelErrors = form.models.map((m) => {
+      const id = m.id.trim()
+      const modelIdError = !id
+        ? "Required"
+        : seenModels.has(id)
+          ? "Duplicate"
+          : (() => {
+              seenModels.add(id)
+              return undefined
+            })()
+      const modelNameError = !m.name.trim() ? "Required" : undefined
+      return { id: modelIdError, name: modelNameError }
+    })
+    const modelsValid = modelErrors.every((m) => !m.id && !m.name)
+    const models = Object.fromEntries(form.models.map((m) => [m.id.trim(), { name: m.name.trim() }]))
+
+    const seenHeaders = new Set<string>()
+    const headerErrors = form.headers.map((h) => {
+      const key = h.key.trim()
+      const value = h.value.trim()
+
+      if (!key && !value) return {}
+      const keyError = !key
+        ? "Required"
+        : seenHeaders.has(key.toLowerCase())
+          ? "Duplicate"
+          : (() => {
+              seenHeaders.add(key.toLowerCase())
+              return undefined
+            })()
+      const valueError = !value ? "Required" : undefined
+      return { key: keyError, value: valueError }
+    })
+    const headersValid = headerErrors.every((h) => !h.key && !h.value)
+    const headers = Object.fromEntries(
+      form.headers
+        .map((h) => ({ key: h.key.trim(), value: h.value.trim() }))
+        .filter((h) => !!h.key && !!h.value)
+        .map((h) => [h.key, h.value]),
+    )
+
+    setErrors(
+      produce((draft) => {
+        draft.providerID = idError ?? existsError
+        draft.name = nameError
+        draft.baseURL = urlError
+        draft.models = modelErrors
+        draft.headers = headerErrors
+      }),
+    )
+
+    const ok = !idError && !existsError && !nameError && !urlError && modelsValid && headersValid
+    if (!ok) return
+
+    const options = {
+      baseURL,
+      ...(apiKey ? { apiKey } : {}),
+      ...(Object.keys(headers).length ? { headers } : {}),
+    }
+
+    return {
+      providerID,
+      name,
+      config: {
+        npm: OPENAI_COMPATIBLE,
+        name,
+        options,
+        models,
+      },
+    }
+  }
+
+  const save = async (e: SubmitEvent) => {
+    e.preventDefault()
+    if (form.saving) return
+
+    const result = validate()
+    if (!result) return
+
+    setForm("saving", true)
+
+    const beforeProvider = globalSync.data.config.provider
+    const beforeDisabled = globalSync.data.config.disabled_providers
+
+    const nextProvider = { ...(beforeProvider ?? {}), [result.providerID]: result.config }
+    const nextDisabled = (beforeDisabled ?? []).filter((id) => id !== result.providerID)
+
+    globalSync.set("config", "provider", nextProvider)
+    globalSync.set("config", "disabled_providers", nextDisabled)
+
+    globalSync
+      .updateConfig({ provider: { [result.providerID]: result.config }, disabled_providers: nextDisabled })
+      .then(() => {
+        dialog.close()
+        showToast({
+          variant: "success",
+          icon: "circle-check",
+          title: language.t("provider.connect.toast.connected.title", { provider: result.name }),
+          description: language.t("provider.connect.toast.connected.description", { provider: result.name }),
+        })
+      })
+      .catch((err: unknown) => {
+        globalSync.set("config", "provider", beforeProvider)
+        globalSync.set("config", "disabled_providers", beforeDisabled)
+        const message = err instanceof Error ? err.message : String(err)
+        showToast({ title: language.t("common.requestFailed"), description: message })
+      })
+      .finally(() => {
+        setForm("saving", false)
+      })
+  }
+
+  return (
+    <Dialog
+      title={
+        <IconButton
+          tabIndex={-1}
+          icon="arrow-left"
+          variant="ghost"
+          onClick={goBack}
+          aria-label={language.t("common.goBack")}
+        />
+      }
+      transition
+    >
+      <div class="flex flex-col gap-6 px-2.5 pb-3">
+        <div class="px-2.5 flex gap-4 items-center">
+          <ProviderIcon id="synthetic" class="size-5 shrink-0 icon-strong-base" />
+          <div class="text-16-medium text-text-strong">Custom provider</div>
+        </div>
+
+        <div class="px-2.5 pb-10 flex flex-col gap-6">
+          <div class="text-14-regular text-text-base">
+            Configure an OpenAI-compatible provider. Fields map to the
+            <Link href="https://opencode.ai/docs/providers/#custom-provider" tabIndex={-1}>
+              provider config docs
+            </Link>
+            .
+          </div>
+
+          <form onSubmit={save} class="flex flex-col gap-6">
+            <div class="grid grid-cols-1 gap-4">
+              <TextField
+                autofocus
+                label="Provider ID"
+                placeholder="myprovider"
+                value={form.providerID}
+                onChange={setForm.bind(null, "providerID")}
+                validationState={errors.providerID ? "invalid" : undefined}
+                error={errors.providerID}
+              />
+              <TextField
+                label="Display name"
+                placeholder="My AI Provider"
+                value={form.name}
+                onChange={setForm.bind(null, "name")}
+                validationState={errors.name ? "invalid" : undefined}
+                error={errors.name}
+              />
+              <TextField
+                label="Base URL"
+                placeholder="https://api.myprovider.com/v1"
+                value={form.baseURL}
+                onChange={setForm.bind(null, "baseURL")}
+                validationState={errors.baseURL ? "invalid" : undefined}
+                error={errors.baseURL}
+              />
+              <TextField
+                label="API key (optional)"
+                placeholder="{env:MYPROVIDER_API_KEY}"
+                description="Leave empty if you manage auth elsewhere."
+                value={form.apiKey}
+                onChange={setForm.bind(null, "apiKey")}
+              />
+            </div>
+
+            <div class="flex flex-col gap-3">
+              <div class="text-14-medium text-text-strong">Models</div>
+              <For each={form.models}>
+                {(m, i) => (
+                  <div class="flex gap-3 items-start">
+                    <div class="flex-1 grid grid-cols-1 gap-3">
+                      <TextField
+                        label={i() === 0 ? "Model ID" : undefined}
+                        hideLabel={i() !== 0}
+                        placeholder="my-model-name"
+                        value={m.id}
+                        onChange={(v) => setForm("models", i(), "id", v)}
+                        validationState={errors.models[i()]?.id ? "invalid" : undefined}
+                        error={errors.models[i()]?.id}
+                      />
+                      <TextField
+                        label={i() === 0 ? "Model name" : undefined}
+                        hideLabel={i() !== 0}
+                        placeholder="My Model"
+                        value={m.name}
+                        onChange={(v) => setForm("models", i(), "name", v)}
+                        validationState={errors.models[i()]?.name ? "invalid" : undefined}
+                        error={errors.models[i()]?.name}
+                      />
+                    </div>
+                    <IconButton
+                      type="button"
+                      icon="trash"
+                      variant="ghost"
+                      onClick={() => removeModel(i())}
+                      aria-label="Remove model"
+                    />
+                  </div>
+                )}
+              </For>
+              <Button type="button" size="large" variant="secondary" icon="plus-small" onClick={addModel}>
+                Add model
+              </Button>
+            </div>
+
+            <div class="flex flex-col gap-3">
+              <div class="text-14-medium text-text-strong">Headers (optional)</div>
+              <For each={form.headers}>
+                {(h, i) => (
+                  <div class="flex gap-3 items-start">
+                    <div class="flex-1 grid grid-cols-1 gap-3">
+                      <TextField
+                        label={i() === 0 ? "Header" : undefined}
+                        hideLabel={i() !== 0}
+                        placeholder="Authorization"
+                        value={h.key}
+                        onChange={(v) => setForm("headers", i(), "key", v)}
+                        validationState={errors.headers[i()]?.key ? "invalid" : undefined}
+                        error={errors.headers[i()]?.key}
+                      />
+                      <TextField
+                        label={i() === 0 ? "Value" : undefined}
+                        hideLabel={i() !== 0}
+                        placeholder="Bearer ..."
+                        value={h.value}
+                        onChange={(v) => setForm("headers", i(), "value", v)}
+                        validationState={errors.headers[i()]?.value ? "invalid" : undefined}
+                        error={errors.headers[i()]?.value}
+                      />
+                    </div>
+                    <IconButton
+                      type="button"
+                      icon="trash"
+                      variant="ghost"
+                      onClick={() => removeHeader(i())}
+                      aria-label="Remove header"
+                    />
+                  </div>
+                )}
+              </For>
+              <Button type="button" size="large" variant="secondary" icon="plus-small" onClick={addHeader}>
+                Add header
+              </Button>
+            </div>
+
+            <div class="flex items-center gap-3">
+              <Button
+                type="button"
+                size="large"
+                variant="secondary"
+                onClick={() => dialog.close()}
+                disabled={form.saving}
+              >
+                {language.t("common.cancel")}
+              </Button>
+              <Button type="submit" size="large" variant="primary" disabled={form.saving}>
+                {form.saving ? language.t("common.saving") : language.t("common.save")}
+              </Button>
+            </div>
+          </form>
+        </div>
+      </div>
+    </Dialog>
+  )
+}
diff --git a/packages/app/src/components/dialog-select-provider.tsx b/packages/app/src/components/dialog-select-provider.tsx
index 5933bff19..f878e50e8 100644
--- a/packages/app/src/components/dialog-select-provider.tsx
+++ b/packages/app/src/components/dialog-select-provider.tsx
@@ -5,9 +5,17 @@ import { Dialog } from "@opencode-ai/ui/dialog"
 import { List } from "@opencode-ai/ui/list"
 import { Tag } from "@opencode-ai/ui/tag"
 import { ProviderIcon } from "@opencode-ai/ui/provider-icon"
-import { IconName } from "@opencode-ai/ui/icons/provider"
+import { iconNames, type IconName } from "@opencode-ai/ui/icons/provider"
 import { DialogConnectProvider } from "./dialog-connect-provider"
 import { useLanguage } from "@/context/language"
+import { DialogCustomProvider } from "./dialog-custom-provider"
+
+const CUSTOM_ID = "_custom"
+
+function icon(id: string): IconName {
+  if (iconNames.includes(id as IconName)) return id as IconName
+  return "synthetic"
+}
 
 export const DialogSelectProvider: Component = () => {
   const dialog = useDialog()
@@ -26,11 +34,13 @@ export const DialogSelectProvider: Component = () => {
         key={(x) => x?.id}
         items={() => {
           language.locale()
-          return providers.all()
+          return [{ id: CUSTOM_ID, name: "Custom provider" }, ...providers.all()]
         }}
         filterKeys={["id", "name"]}
         groupBy={(x) => (popularProviders.includes(x.id) ? popularGroup() : otherGroup())}
         sortBy={(a, b) => {
+          if (a.id === CUSTOM_ID) return -1
+          if (b.id === CUSTOM_ID) return 1
           if (popularProviders.includes(a.id) && popularProviders.includes(b.id))
             return popularProviders.indexOf(a.id) - popularProviders.indexOf(b.id)
           return a.name.localeCompare(b.name)
@@ -43,13 +53,20 @@ export const DialogSelectProvider: Component = () => {
         }}
         onSelect={(x) => {
           if (!x) return
+          if (x.id === CUSTOM_ID) {
+            dialog.show(() => <DialogCustomProvider back="providers" />)
+            return
+          }
           dialog.show(() => <DialogConnectProvider provider={x.id} />)
         }}
       >
         {(i) => (
           <div class="px-1.25 w-full flex items-center gap-x-3">
-            <ProviderIcon data-slot="list-item-extra-icon" id={i.id as IconName} />
+            <ProviderIcon data-slot="list-item-extra-icon" id={icon(i.id)} />
             <span>{i.name}</span>
+            <Show when={i.id === CUSTOM_ID}>
+              <Tag>{language.t("settings.providers.tag.custom")}</Tag>
+            </Show>
             <Show when={i.id === "opencode"}>
               <Tag>{language.t("dialog.provider.tag.recommended")}</Tag>
             </Show>
diff --git a/packages/app/src/components/settings-providers.tsx b/packages/app/src/components/settings-providers.tsx
index 86a393b98..abc2bee77 100644
--- a/packages/app/src/components/settings-providers.tsx
+++ b/packages/app/src/components/settings-providers.tsx
@@ -3,13 +3,15 @@ import { useDialog } from "@opencode-ai/ui/context/dialog"
 import { ProviderIcon } from "@opencode-ai/ui/provider-icon"
 import { Tag } from "@opencode-ai/ui/tag"
 import { showToast } from "@opencode-ai/ui/toast"
-import type { IconName } from "@opencode-ai/ui/icons/provider"
+import { iconNames, type IconName } from "@opencode-ai/ui/icons/provider"
 import { popularProviders, useProviders } from "@/hooks/use-providers"
 import { createMemo, type Component, For, Show } from "solid-js"
 import { useLanguage } from "@/context/language"
 import { useGlobalSDK } from "@/context/global-sdk"
+import { useGlobalSync } from "@/context/global-sync"
 import { DialogConnectProvider } from "./dialog-connect-provider"
 import { DialogSelectProvider } from "./dialog-select-provider"
+import { DialogCustomProvider } from "./dialog-custom-provider"
 
 type ProviderSource = "env" | "api" | "config" | "custom"
 type ProviderMeta = { source?: ProviderSource }
@@ -18,8 +20,14 @@ export const SettingsProviders: Component = () => {
   const dialog = useDialog()
   const language = useLanguage()
   const globalSDK = useGlobalSDK()
+  const globalSync = useGlobalSync()
   const providers = useProviders()
 
+  const icon = (id: string): IconName => {
+    if (iconNames.includes(id as IconName)) return id as IconName
+    return "synthetic"
+  }
+
   const connected = createMemo(() => {
     return providers
       .connected()
@@ -42,14 +50,53 @@ export const SettingsProviders: Component = () => {
     const current = source(item)
     if (current === "env") return language.t("settings.providers.tag.environment")
     if (current === "api") return language.t("provider.connect.method.apiKey")
-    if (current === "config") return language.t("settings.providers.tag.config")
+    if (current === "config") {
+      const id = (item as { id?: string }).id
+      if (id && isConfigCustom(id)) return language.t("settings.providers.tag.custom")
+      return language.t("settings.providers.tag.config")
+    }
     if (current === "custom") return language.t("settings.providers.tag.custom")
     return language.t("settings.providers.tag.other")
   }
 
   const canDisconnect = (item: unknown) => source(item) !== "env"
 
+  const isConfigCustom = (providerID: string) => {
+    const provider = globalSync.data.config.provider?.[providerID]
+    if (!provider) return false
+    if (provider.npm !== "@ai-sdk/openai-compatible") return false
+    if (!provider.models || Object.keys(provider.models).length === 0) return false
+    return true
+  }
+
+  const disableProvider = async (providerID: string, name: string) => {
+    const before = globalSync.data.config.disabled_providers ?? []
+    const next = before.includes(providerID) ? before : [...before, providerID]
+    globalSync.set("config", "disabled_providers", next)
+
+    await globalSync
+      .updateConfig({ disabled_providers: next })
+      .then(() => {
+        showToast({
+          variant: "success",
+          icon: "circle-check",
+          title: language.t("provider.disconnect.toast.disconnected.title", { provider: name }),
+          description: language.t("provider.disconnect.toast.disconnected.description", { provider: name }),
+        })
+      })
+      .catch((err: unknown) => {
+        globalSync.set("config", "disabled_providers", before)
+        const message = err instanceof Error ? err.message : String(err)
+        showToast({ title: language.t("common.requestFailed"), description: message })
+      })
+  }
+
   const disconnect = async (providerID: string, name: string) => {
+    if (isConfigCustom(providerID)) {
+      await globalSDK.client.auth.remove({ providerID }).catch(() => undefined)
+      await disableProvider(providerID, name)
+      return
+    }
     await globalSDK.client.auth
       .remove({ providerID })
       .then(async () => {
@@ -91,7 +138,7 @@ export const SettingsProviders: Component = () => {
                 {(item) => (
                   <div class="group flex items-center justify-between gap-4 h-16 border-b border-border-weak-base last:border-none">
                     <div class="flex items-center gap-3 min-w-0">
-                      <ProviderIcon id={item.id as IconName} class="size-5 shrink-0 icon-strong-base" />
+                      <ProviderIcon id={icon(item.id)} class="size-5 shrink-0 icon-strong-base" />
                       <span class="text-14-medium text-text-strong truncate">{item.name}</span>
                       <Tag>{type(item)}</Tag>
                     </div>
@@ -122,7 +169,7 @@ export const SettingsProviders: Component = () => {
                 <div class="flex items-center justify-between gap-4 h-16 border-b border-border-weak-base last:border-none">
                   <div class="flex flex-col min-w-0">
                     <div class="flex items-center gap-x-3">
-                      <ProviderIcon id={item.id as IconName} class="size-5 shrink-0 icon-strong-base" />
+                      <ProviderIcon id={icon(item.id)} class="size-5 shrink-0 icon-strong-base" />
                       <span class="text-14-medium text-text-strong">{item.name}</span>
                       <Show when={item.id === "opencode"}>
                         <Tag>{language.t("dialog.provider.tag.recommended")}</Tag>
@@ -177,6 +224,27 @@ export const SettingsProviders: Component = () => {
                 </div>
               )}
             </For>
+
+            <div class="flex items-center justify-between gap-4 h-16 border-b border-border-weak-base last:border-none">
+              <div class="flex flex-col min-w-0">
+                <div class="flex items-center gap-x-3">
+                  <ProviderIcon id={icon("synthetic")} class="size-5 shrink-0 icon-strong-base" />
+                  <span class="text-14-medium text-text-strong">Custom provider</span>
+                  <Tag>{language.t("settings.providers.tag.custom")}</Tag>
+                </div>
+                <span class="text-12-regular text-text-weak pl-8">Add an OpenAI-compatible provider by base URL.</span>
+              </div>
+              <Button
+                size="large"
+                variant="secondary"
+                icon="plus-small"
+                onClick={() => {
+                  dialog.show(() => <DialogCustomProvider back="close" />)
+                }}
+              >
+                {language.t("common.connect")}
+              </Button>
+            </div>
           </div>
 
           <Button