feat(agent): expose profile streaming policy

eslint.config.js

@@ -24,6 +24,8 @@ export default tseslint.config(
     },
     rules: {
       'max-lines': ['error', 500],
+      // Switch copy is nested under label > span > strong/small.
+      'jsx-a11y/label-has-associated-control': ['error', { depth: 3 }],
       // A focusable separator is the keyboard-operated window-splitter pattern.
       'jsx-a11y/no-interactive-element-to-noninteractive-role': ['error', {
         button: ['separator'],

src/scripts/extensions/agent-system/i18n/zh-cn.json

@@ -138,6 +138,8 @@
     "agent_system.retryIntervalMs": "重试间隔（毫秒）",
     "agent_system.resizeTimelineHeight": "拖动以调节时间线高度",
     "agent_system.runPolicy": "运行策略",
+    "agent_system.streaming": "流式传输",
+    "agent_system.streamingHint": "实时传输生成中的工具参数；前台 write_file 内容会同步显示在聊天中。",
     "agent_system.runs": "运行记录",
     "agent_system.runHistory": "运行记录",
     "agent_system.runHistoryAllChats": "全部聊天",

src/scripts/extensions/agent-system/i18n/zh-tw.json

@@ -138,6 +138,8 @@
     "agent_system.retryIntervalMs": "重試間隔（毫秒）",
     "agent_system.resizeTimelineHeight": "拖曳以調整時間線高度",
     "agent_system.runPolicy": "執行策略",
+    "agent_system.streaming": "串流傳輸",
+    "agent_system.streamingHint": "即時傳輸生成中的工具參數；前台 write_file 內容會同步顯示在聊天中。",
     "agent_system.runs": "執行記錄",
     "agent_system.runHistory": "執行記錄",
     "agent_system.runHistoryAllChats": "全部聊天",

src/scripts/extensions/agent-system/src/AgentSystemDraftEditor.ts

@@ -66,6 +66,7 @@ export type AgentSystemDraftEditor = {
     setCanDelegate: (enabled: boolean) => void;
     setCanHandoff: (enabled: boolean) => void;
     setRunPresentation: (presentation: string) => void;
+    setRunStream: (enabled: boolean) => void;
     setCallableAsSubAgent: (enabled: boolean) => void;
     setCallableAsHandoffTarget: (enabled: boolean) => void;
     setDelegationDescription: (value: string) => void;
@@ -213,6 +214,14 @@ export function createAgentSystemDraftEditor(context: AgentSystemDraftEditorCont
                 applyRunPresentation(draft, presentation, context.presentationMemory, memoryKey(draft));
             });
         },
+        setRunStream(enabled) {
+            if (isBuiltin()) {
+                return;
+            }
+            editDraft((draft) => {
+                draft.run.stream = enabled;
+            });
+        },
         setCallableAsSubAgent(enabled) {
             if (isBuiltin()) {
                 return;

src/scripts/extensions/agent-system/src/ProfilePolicyToolsSections.tsx

@@ -24,27 +24,6 @@ export function ProfileMainDelegationSection({ snapshot, controller, tr }: Profi
     const { draft } = snapshot;
     const builtin = isBuiltinProfile(draft);
     const callableHandoffTarget = isCallableAsHandoffTarget(draft);
-    // The label text stays in the same DOM position; hoisting it into a
-    // variable keeps the rendered tree identical while letting the a11y
-    // lint see the label copy (it only scans two levels deep).
-    const delegateCopy = (
-        <span>
-            <strong>{tr('delegateToSubAgents')}</strong>
-            <small>{tr('delegateToSubAgentsHint')}</small>
-        </span>
-    );
-    const handoffCopy = (
-        <span>
-            <strong>{tr('allowAgentHandoff')}</strong>
-            <small>{tr('allowAgentHandoffHint')}</small>
-        </span>
-    );
-    const handoffTargetCopy = (
-        <span>
-            <strong>{tr('callableHandoffTargetToggle')}</strong>
-            <small>{tr('callableHandoffTargetHint')}</small>
-        </span>
-    );
     return (
         <div className="ttas-section" data-ttas-profile-section="main-delegation">
             <div className="ttas-section-title">
@@ -59,7 +38,10 @@ export function ProfileMainDelegationSection({ snapshot, controller, tr }: Profi
                         disabled={builtin}
                         onChange={(event) => controller.setCanDelegate(event.target.checked)}
                     />
-                    {delegateCopy}
+                    <span>
+                        <strong>{tr('delegateToSubAgents')}</strong>
+                        <small>{tr('delegateToSubAgentsHint')}</small>
+                    </span>
                 </label>
                 {draft.delegation.canDelegate && (
                     <div className="ttas-form-grid ttas-delegation-controls">
@@ -94,7 +76,10 @@ export function ProfileMainDelegationSection({ snapshot, controller, tr }: Profi
                         disabled={builtin}
                         onChange={(event) => controller.setCanHandoff(event.target.checked)}
                     />
-                    {handoffCopy}
+                    <span>
+                        <strong>{tr('allowAgentHandoff')}</strong>
+                        <small>{tr('allowAgentHandoffHint')}</small>
+                    </span>
                 </label>
                 {draft.delegation.canHandoff && (
                     <div className="ttas-form-grid ttas-delegation-controls">
@@ -118,7 +103,10 @@ export function ProfileMainDelegationSection({ snapshot, controller, tr }: Profi
                         disabled={builtin}
                         onChange={(event) => controller.setCallableAsHandoffTarget(event.target.checked)}
                     />
-                    {handoffTargetCopy}
+                    <span>
+                        <strong>{tr('callableHandoffTargetToggle')}</strong>
+                        <small>{tr('callableHandoffTargetHint')}</small>
+                    </span>
                 </label>
                 {callableHandoffTarget && (
                     <div className="ttas-form-grid ttas-delegation-controls">
@@ -161,12 +149,6 @@ export function ProfileSubAgentAccessSection({ snapshot, controller, tr }: Profi
     const { draft } = snapshot;
     const builtin = isBuiltinProfile(draft);
     const callableSubAgent = isCallableAsSubAgent(draft);
-    const subAgentCopy = (
-        <span>
-            <strong>{tr('callableSubAgentToggle')}</strong>
-            <small>{tr('callableSubAgentHint')}</small>
-        </span>
-    );
     return (
         <div className="ttas-section" data-ttas-profile-section="subagent-access">
             <div className="ttas-section-title">
@@ -181,7 +163,10 @@ export function ProfileSubAgentAccessSection({ snapshot, controller, tr }: Profi
                         disabled={builtin}
                         onChange={(event) => controller.setCallableAsSubAgent(event.target.checked)}
                     />
-                    {subAgentCopy}
+                    <span>
+                        <strong>{tr('callableSubAgentToggle')}</strong>
+                        <small>{tr('callableSubAgentHint')}</small>
+                    </span>
                 </label>
                 {callableSubAgent && (
                     <div className="ttas-form-grid ttas-delegation-controls">
@@ -231,6 +216,18 @@ export function ProfileRunSection({ snapshot, controller, tr }: ProfileSectionPr
                 <h4>{tr('runPolicy')}</h4>
             </div>
             <div className="ttas-form-grid">
+                <label className="ttas-switch-row ttas-span-2">
+                    <input
+                        type="checkbox"
+                        checked={draft.run.stream}
+                        disabled={builtin}
+                        onChange={(event) => controller.setRunStream(event.target.checked)}
+                    />
+                    <span>
+                        <strong>{tr('streaming')}</strong>
+                        <small>{tr('streamingHint')}</small>
+                    </span>
+                </label>
                 <label className="ttas-field">
                     <span>{tr('presentation')}</span>
                     <select

src/scripts/extensions/agent-system/src/i18n-default-messages.ts

@@ -216,6 +216,8 @@ export const DEFAULT_MESSAGES = {
     "retryIntervalMs": "Retry Interval Ms",
     "resizeTimelineHeight": "Drag to resize timeline height",
     "runPolicy": "Run Policy",
+    "streaming": "Streaming",
+    "streamingHint": "Stream generated tool arguments. Foreground write_file content appears in chat while it is generated.",
     "runs": "Runs",
     "runHistory": "Run History",
     "runHistoryAllChats": "All chats",

src/scripts/extensions/agent-system/src/profile-model.test.ts

@@ -26,6 +26,7 @@ test('profileForEdit migrates v2 native tool names to canonical ToolIds', () =>
 
 test('profileForEdit keeps CSV drafts separate and normalizeProfileForSave restores lists', () => {
     const profile = defaultProfile('writer');
+    profile.run.stream = true;
     profile.skills.visible = ['lore', 'tools'];
     profile.delegation.allowedCallers = ['main', 'reviewer'];
 
@@ -36,12 +37,22 @@ test('profileForEdit keeps CSV drafts separate and normalizeProfileForSave resto
     draft.delegation.allowedCallersCsv = 'editor';
 
     const saved = normalizeProfileForSave(draft);
+    expect(saved.run.stream).toBe(true);
     expect(saved.skills.visible).toEqual(['research', 'tools']);
     expect(saved.delegation.allowedCallers).toEqual(['editor']);
     expect('visibleCsv' in saved.skills).toBe(false);
     expect('allowedCallersCsv' in saved.delegation).toBe(false);
 });
 
+test('run streaming defaults missing fields and rejects non-booleans', () => {
+    const profile = defaultProfile('streaming');
+    Reflect.deleteProperty(profile.run, 'stream');
+    expect(profileForEdit(profile).run.stream).toBe(false);
+
+    Reflect.set(profile.run, 'stream', 'true');
+    expect(() => normalizeProfileForSave(profile)).toThrow(/run\.stream must be a boolean/);
+});
+
 test('tool description overrides preserve user text and reject invalid values', () => {
     const profile = defaultProfile('descriptions');
     profile.tools.toolDescriptions = {

src/scripts/extensions/agent-system/src/profile-model.ts

@@ -207,11 +207,16 @@ function normalizeRunPolicy(value: unknown): AgentProfile['run'] {
     if (presentation !== 'foreground' && presentation !== 'background') {
         throw new Error(`run.presentation is unsupported: ${presentation}`);
     }
+    const stream = policy.stream ?? false;
+    if (typeof stream !== 'boolean') {
+        throw new Error('run.stream must be a boolean');
+    }
     const directRunnable = policy.directRunnable !== false;
     const modelRetry = isPlainObject(policy.modelRetry) ? policy.modelRetry : {};
 
     return {
         presentation: directRunnable ? presentation : 'background',
+        stream,
         directRunnable,
         modelRetry: {
             maxRetries: Number(modelRetry.maxRetries ?? 3),
@@ -329,6 +334,7 @@ export function defaultProfile(id: string = DEFAULT_PROFILE_ID): AgentProfile {
         },
         run: {
             presentation: 'foreground',
+            stream: false,
             directRunnable: true,
             modelRetry: {
                 maxRetries: 3,