Allow ACP providers without model lists

packages/app/src/screens/workspace/workspace-draft-agent-tab-core.ts

@@ -0,0 +1,51 @@
+export interface WorkspaceDraftAutoSubmitConfig {
+  provider: string;
+  model: string | null;
+}
+
+export function validateDraftSubmission(input: {
+  text: string;
+  allowsEmptyAutoSubmit: boolean;
+  composerState: {
+    providerDefinitions: unknown[];
+    selectedProvider: string | null;
+    isModelLoading: boolean;
+    effectiveModelId: string | null;
+    availableModels: unknown[];
+  };
+  autoSubmitConfig: WorkspaceDraftAutoSubmitConfig | null;
+  workspaceDirectory: string | null;
+  hasClient: boolean;
+}): string | null {
+  const {
+    text,
+    allowsEmptyAutoSubmit,
+    composerState,
+    autoSubmitConfig,
+    workspaceDirectory,
+    hasClient,
+  } = input;
+  if (!allowsEmptyAutoSubmit && !text.trim()) {
+    return "Initial prompt is required";
+  }
+  if (composerState.providerDefinitions.length === 0) {
+    return "No available providers on the selected host";
+  }
+  if (!(autoSubmitConfig?.provider ?? composerState.selectedProvider)) {
+    return "Select a model";
+  }
+  if (composerState.isModelLoading) {
+    return "Model defaults are still loading";
+  }
+  const hasSelectedModel = Boolean(autoSubmitConfig?.model ?? composerState.effectiveModelId);
+  if (!hasSelectedModel && composerState.availableModels.length > 0) {
+    return "No model is available for the selected provider";
+  }
+  if (!workspaceDirectory) {
+    return "Workspace directory not found";
+  }
+  if (!hasClient) {
+    return "Host is not connected";
+  }
+  return null;
+}

packages/app/src/screens/workspace/workspace-draft-agent-tab.test.ts

@@ -0,0 +1,51 @@
+import { describe, expect, test } from "vitest";
+
+import { validateDraftSubmission } from "./workspace-draft-agent-tab-core";
+
+const baseComposerState = {
+  providerDefinitions: [{ id: "deepseek-tui" }],
+  selectedProvider: "deepseek-tui",
+  isModelLoading: false,
+  effectiveModelId: "",
+  availableModels: [],
+};
+
+function validate(overrides = {}) {
+  return validateDraftSubmission({
+    text: "hello",
+    allowsEmptyAutoSubmit: false,
+    composerState: baseComposerState,
+    autoSubmitConfig: null,
+    workspaceDirectory: "/tmp/project",
+    hasClient: true,
+    ...overrides,
+  });
+}
+
+describe("workspace draft agent model validation", () => {
+  test("allows a ready provider with no models to submit without a selected model", () => {
+    expect(validate({})).toBeNull();
+  });
+
+  test("keeps waiting while model defaults are loading", () => {
+    expect(
+      validate({
+        composerState: {
+          ...baseComposerState,
+          isModelLoading: true,
+        },
+      }),
+    ).toBe("Model defaults are still loading");
+  });
+
+  test("still requires a selected model when the provider exposes models", () => {
+    expect(
+      validate({
+        composerState: {
+          ...baseComposerState,
+          availableModels: [{ id: "deepseek/deepseek-v4-pro" }],
+        },
+      }),
+    ).toBe("No model is available for the selected provider");
+  });
+});

packages/app/src/screens/workspace/workspace-draft-agent-tab.tsx

@@ -22,6 +22,7 @@ import { useWorkspaceDraftSubmissionStore } from "@/stores/workspace-draft-submi
 import { encodeImages } from "@/utils/encode-images";
 import type { WorkspaceFileOpenRequest } from "@/workspace/file-open";
 import { shouldAutoFocusWorkspaceDraftComposer } from "@/screens/workspace/workspace-draft-pane-focus";
+import { validateDraftSubmission } from "@/screens/workspace/workspace-draft-agent-tab-core";
 import type { AgentCapabilityFlags } from "@server/server/agent/agent-sdk-types";
 import type { AgentSnapshotPayload } from "@server/shared/messages";
 import type { DaemonClient } from "@server/client/daemon-client";
@@ -73,51 +74,6 @@ function resolveAutoSubmitConfig(
   };
 }
 
-function validateDraftSubmission(input: {
-  text: string;
-  allowsEmptyAutoSubmit: boolean;
-  composerState: {
-    providerDefinitions: unknown[];
-    selectedProvider: string | null;
-    isModelLoading: boolean;
-    effectiveModelId: string | null;
-  };
-  autoSubmitConfig: AutoSubmitConfig | null;
-  workspaceDirectory: string | null;
-  hasClient: boolean;
-}): string | null {
-  const {
-    text,
-    allowsEmptyAutoSubmit,
-    composerState,
-    autoSubmitConfig,
-    workspaceDirectory,
-    hasClient,
-  } = input;
-  if (!allowsEmptyAutoSubmit && !text.trim()) {
-    return "Initial prompt is required";
-  }
-  if (composerState.providerDefinitions.length === 0) {
-    return "No available providers on the selected host";
-  }
-  if (!(autoSubmitConfig?.provider ?? composerState.selectedProvider)) {
-    return "Select a model";
-  }
-  if (composerState.isModelLoading) {
-    return "Model defaults are still loading";
-  }
-  if (!(autoSubmitConfig?.model ?? composerState.effectiveModelId)) {
-    return "No model is available for the selected provider";
-  }
-  if (!workspaceDirectory) {
-    return "Workspace directory not found";
-  }
-  if (!hasClient) {
-    return "Host is not connected";
-  }
-  return null;
-}
-
 function resolveDraftModeIdOverride(input: {
   autoSubmitConfig: AutoSubmitConfig | null;
   modeOptionsCount: number;