worker: support typed initial submit on spawn

web/workspace/src/lib/workspace/console/worker-console.ui.test.ts

@@ -509,7 +509,7 @@ Deno.test("workspace Worker sidebar links New to the dedicated create page", asy
   );
   assert(
     newWorkerPage.includes("worker-launch-form") &&
-      newWorkerPage.includes("buildBrowserCreateWorkerRequest") &&
+      newWorkerPage.includes("buildCreateWorkspaceWorkerRequest") &&
       newWorkerPage.includes("/workers/launch-options"),
     "New Worker page should own launch options and creation form behavior",
   );

web/workspace/src/lib/workspace/sidebar/worker-launch.test.ts

@@ -1,5 +1,5 @@
 import {
-  buildBrowserCreateWorkerRequest,
+  buildCreateWorkspaceWorkerRequest,
   defaultWorkerLaunchForm,
 } from "./worker-launch.ts";
 import type { WorkerLaunchOptionsResponse } from "./types.ts";
@@ -182,8 +182,8 @@ Deno.test("defaultWorkerLaunchForm preserves a Ticket repository target", () =>
   assertEquals(form.working_directory_selector, "work/ticket");
 });
 
-Deno.test("buildBrowserCreateWorkerRequest sends working_directory id and relative cwd only", () => {
-  const request = buildBrowserCreateWorkerRequest({
+Deno.test("buildCreateWorkspaceWorkerRequest sends working_directory id and relative cwd only", () => {
+  const request = buildCreateWorkspaceWorkerRequest({
     runtime_id: "embedded",
     display_name: "Worker",
     profile: "builtin:coder",
@@ -198,7 +198,7 @@ Deno.test("buildBrowserCreateWorkerRequest sends working_directory id and relati
     runtime_id: "embedded",
     display_name: "Worker",
     profile: "builtin:coder",
-    initial_text: "go",
+    initial_submit: [{ kind: "text", content: "go" }],
     working_directory: {
       working_directory_id: "wd-1-repo",
       relative_cwd: "crates/yoi",
@@ -206,8 +206,23 @@ Deno.test("buildBrowserCreateWorkerRequest sends working_directory id and relati
   });
 });
 
-Deno.test("buildBrowserCreateWorkerRequest omits working_directory for embedded no-workdir launches", () => {
-  const request = buildBrowserCreateWorkerRequest({
+Deno.test("buildCreateWorkspaceWorkerRequest sends no initial segments for an empty draft", () => {
+  const request = buildCreateWorkspaceWorkerRequest({
+    runtime_id: "embedded",
+    display_name: "Worker",
+    profile: "builtin:companion",
+    initial_text: "   ",
+    working_directory_id: "",
+    working_directory_repository_id: "",
+    working_directory_selector: "",
+    relative_cwd: "",
+  });
+
+  assertEquals(request.initial_submit, []);
+});
+
+Deno.test("buildCreateWorkspaceWorkerRequest omits working_directory for embedded no-workdir launches", () => {
+  const request = buildCreateWorkspaceWorkerRequest({
     runtime_id: "embedded",
     display_name: "Worker",
     profile: "builtin:companion",
@@ -222,6 +237,6 @@ Deno.test("buildBrowserCreateWorkerRequest omits working_directory for embedded
     runtime_id: "embedded",
     display_name: "Worker",
     profile: "builtin:companion",
-    initial_text: "chat",
+    initial_submit: [{ kind: "text", content: "chat" }],
   });
 });

web/workspace/src/lib/workspace/sidebar/worker-launch.ts

@@ -1,3 +1,5 @@
+import type { Segment } from "$lib/generated/protocol";
+
 import type {
   BrowserWorkerWorkingDirectorySelection,
   WorkerLaunchOptionsResponse,
@@ -14,11 +16,11 @@ export type WorkerLaunchFormState = {
   relative_cwd: string;
 };
 
-export type BrowserCreateWorkerRequest = {
+export type CreateWorkspaceWorkerRequest = {
   runtime_id: string;
   display_name: string;
   profile: string;
-  initial_text: string;
+  initial_submit: Segment[];
   working_directory?: BrowserWorkerWorkingDirectorySelection;
 };
 
@@ -92,14 +94,16 @@ export function defaultWorkerLaunchForm(
   };
 }
 
-export function buildBrowserCreateWorkerRequest(
+export function buildCreateWorkspaceWorkerRequest(
   form: WorkerLaunchFormState,
-): BrowserCreateWorkerRequest {
-  const request: BrowserCreateWorkerRequest = {
+): CreateWorkspaceWorkerRequest {
+  const request: CreateWorkspaceWorkerRequest = {
     runtime_id: form.runtime_id,
     display_name: form.display_name,
     profile: form.profile,
-    initial_text: form.initial_text,
+    initial_submit: form.initial_text.trim()
+      ? [{ kind: "text", content: form.initial_text }]
+      : [],
   };
   if (form.working_directory_id) {
     request.working_directory = {

web/workspace/src/routes/w/[workspaceId]/workers/new/+page.svelte

@@ -3,7 +3,7 @@
   import { untrack } from 'svelte';
   import { workspaceApiPath } from '$lib/workspace/api/http';
   import { formatCurrentWorkdirRevision } from '$lib/workspace/settings/workdir-revision';
-  import { buildBrowserCreateWorkerRequest, defaultWorkerLaunchForm } from '$lib/workspace/sidebar/worker-launch';
+  import { buildCreateWorkspaceWorkerRequest, defaultWorkerLaunchForm } from '$lib/workspace/sidebar/worker-launch';
   import type {
     BrowserCreateWorkerResponse,
     BrowserWorkingDirectoryCreateResponse,
@@ -210,7 +210,7 @@
       const response = await fetch(workerApiPath('/workers'), {
         method: 'POST',
         headers: { 'content-type': 'application/json' },
-        body: JSON.stringify(buildBrowserCreateWorkerRequest({
+        body: JSON.stringify(buildCreateWorkspaceWorkerRequest({
           runtime_id: runtimeId,
           display_name: displayName,
           profile,