feat: enable background subagents by default

packages/opencode/test/cli/run/footer.view.test.tsx

@@ -161,7 +161,6 @@ async function renderFooter(
     currentModel?: RunInput["model"]
     currentVariant?: string
     subagents?: FooterSubagentState
-    backgroundSubagents?: boolean
     width?: number
     height?: number
     state?: Partial<FooterState>
@@ -199,7 +198,6 @@ async function renderFooter(
           subagent={subagents}
           theme={input.theme ?? (() => RUN_THEME_FALLBACK)}
           tuiConfig={config}
-          backgroundSubagents={input.backgroundSubagents ?? true}
           agent="opencode"
           onSubmit={input.onSubmit ?? (() => true)}
           onPermissionReply={() => {}}
@@ -998,7 +996,6 @@ test("direct footer shows editable prompts and additional queued work while runn
           ]}
           theme={() => RUN_THEME_FALLBACK}
           tuiConfig={tuiConfig}
-          backgroundSubagents={true}
           agent="opencode"
           onSubmit={() => true}
           onPermissionReply={() => {}}
@@ -1071,7 +1068,7 @@ test("direct footer shows editable prompts and additional queued work while runn
   }
 })
 
-test("direct footer separates a lone context hint from model and command hint", async () => {
+test("direct footer always offers backgrounding for a foreground subagent", async () => {
   const app = await renderFooter({
     providers: [provider()],
     currentModel: { providerID: "opencode", modelID: "gpt-5" },
@@ -1082,7 +1079,6 @@ test("direct footer separates a lone context hint from model and command hint",
       permissions: [],
       questions: [],
     },
-    backgroundSubagents: false,
     width: 160,
   })
 
@@ -1091,8 +1087,8 @@ test("direct footer separates a lone context hint from model and command hint",
     const frame = app.captureCharFrame()
 
     expect(frame).toContain("GPT-5")
-    expect(frame).toContain("xhigh · ctrl+x down subagents · ctrl+p cmd")
-    expect(frame).not.toContain("ctrl+b background")
+    expect(frame).toContain("xhigh · ctrl+b background · ctrl+x down subagents · ctrl+p cmd")
+    expect(frame).toContain("ctrl+b background")
     expect(frame).not.toContain("queued")
   } finally {
     app.cleanup()
@@ -1110,7 +1106,6 @@ test("direct footer hides the subagent hint when only completed subagents remain
       permissions: [],
       questions: [],
     },
-    backgroundSubagents: false,
     width: 160,
   })
 

packages/opencode/test/cli/run/runtime.test.ts

@@ -134,7 +134,6 @@ describe("run interactive runtime", () => {
         variant: undefined,
         files: [],
         thinking: false,
-        backgroundSubagents: false,
       },
       {
         createRuntimeLifecycle: async () => {
@@ -233,7 +232,6 @@ describe("run interactive runtime", () => {
         variant: undefined,
         files: [],
         thinking: false,
-        backgroundSubagents: false,
       },
       {
         createRuntimeLifecycle: async () => {
@@ -406,7 +404,6 @@ describe("run interactive runtime", () => {
         variant: undefined,
         files: [],
         thinking: true,
-        backgroundSubagents: false,
       },
       {
         createRuntimeLifecycle: async (input) => {
@@ -496,7 +493,6 @@ describe("run interactive runtime", () => {
         variant: undefined,
         files: [],
         thinking: false,
-        backgroundSubagents: false,
       },
       {
         createRuntimeLifecycle: async (input) => {
@@ -557,7 +553,6 @@ describe("run interactive runtime", () => {
         variant: undefined,
         files: [],
         thinking: false,
-        backgroundSubagents: false,
       },
       {
         createRuntimeLifecycle: async () => {
@@ -603,7 +598,6 @@ describe("run interactive runtime", () => {
         variant: undefined,
         files: [],
         thinking: false,
-        backgroundSubagents: false,
       },
       {
         createRuntimeLifecycle: async (input) => {
@@ -716,7 +710,6 @@ describe("run interactive runtime", () => {
         variant: "low",
         files: [],
         thinking: false,
-        backgroundSubagents: false,
       },
       {
         createRuntimeLifecycle: async (input) => {