feat: enable background subagents by default

packages/cli/src/mini/footer.ts

@@ -84,7 +84,6 @@ type RunFooterOptions = {
   theme: RunTheme
   keymap: Keymap<Renderable, KeyEvent>
   tuiConfig: RunTuiConfig
-  backgroundSubagents: boolean
   diffStyle: RunDiffStyle
   onPermissionReply: (input: PermissionReply) => void | Promise<void>
   onQuestionReply: (input: QuestionReply) => void | Promise<void>
@@ -326,7 +325,6 @@ export class RunFooter implements FooterApi {
               theme: footer.theme,
               diffStyle: options.diffStyle,
               tuiConfig: options.tuiConfig,
-              backgroundSubagents: options.backgroundSubagents,
               history: footer.history,
               agent: options.agentLabel,
               onSubmit: footer.handlePrompt,

packages/cli/src/mini/footer.view.tsx

@@ -89,7 +89,6 @@ type RunFooterViewProps = {
   theme: () => RunTheme
   diffStyle?: RunDiffStyle
   tuiConfig: RunTuiConfig
-  backgroundSubagents: boolean
   history?: () => RunPrompt[]
   agent: string
   onSubmit: (input: RunPrompt) => boolean
@@ -169,9 +168,7 @@ export function RunFooterView(props: RunFooterViewProps) {
 
     return tabs().findIndex((item) => item.sessionID === sessionID) + 1
   })
-  const foregroundSubagents = createMemo(
-    () => props.backgroundSubagents && activeTabs().some((item) => !item.background),
-  )
+  const foregroundSubagents = createMemo(() => activeTabs().some((item) => !item.background))
   const model = createMemo(() => {
     const current = props.currentModel()
     return current ? modelInfo(props.providers(), current) : { model: props.state().model, provider: undefined }

packages/cli/src/mini/mini.ts

@@ -1,6 +1,5 @@
 import { NodeFileSystem } from "@effect/platform-node"
 import { OpenCode, type OpenCodeClient } from "@opencode-ai/client/promise"
-import { truthy } from "@opencode-ai/core/flag/flag"
 import { Global } from "@opencode-ai/core/global"
 import { Effect } from "effect"
 import path from "node:path"
@@ -84,9 +83,6 @@ export async function runMini(input: MiniCommandInput) {
       files: [],
       initialInput,
       thinking: true,
-      backgroundSubagents:
-        truthy("OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS") ||
-        (process.env.OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS === undefined && truthy("OPENCODE_EXPERIMENTAL")),
       replay: input.replay ?? true,
       replayLimit: input.replayLimit,
       demo: input.demo,

packages/cli/src/mini/runtime.lifecycle.ts

@@ -64,7 +64,6 @@ export type LifecycleInput = {
   model: RunInput["model"]
   variant: string | undefined
   tuiConfig: RunTuiConfig | Promise<RunTuiConfig>
-  backgroundSubagents: boolean
   onPermissionReply: (input: PermissionReply) => void | Promise<void>
   onQuestionReply: (input: QuestionReply) => void | Promise<void>
   onQuestionReject: (input: QuestionReject) => void | Promise<void>
@@ -236,7 +235,6 @@ export async function createRuntimeLifecycle(input: LifecycleInput): Promise<Lif
       wrote,
       keymap,
       tuiConfig,
-      backgroundSubagents: input.backgroundSubagents,
       diffStyle: tuiConfig.diff_style ?? "auto",
       onPermissionReply: input.onPermissionReply,
       onQuestionReply: input.onQuestionReply,

packages/cli/src/mini/runtime.ts

@@ -56,7 +56,6 @@ type RunRuntimeInput = {
   files: RunInput["files"]
   initialInput?: string
   thinking: boolean
-  backgroundSubagents: boolean
   replay?: boolean
   replayLimit?: number
   demo?: RunInput["demo"]
@@ -75,7 +74,6 @@ type RunDeferredInput = {
   files: RunInput["files"]
   initialInput?: string
   thinking: boolean
-  backgroundSubagents: boolean
   replay?: boolean
   replayLimit?: number
   demo?: RunInput["demo"]
@@ -270,7 +268,6 @@ async function runInteractiveRuntime(input: RunRuntimeInput, deps: RunRuntimeDep
     model: state.model,
     variant: state.activeVariant,
     tuiConfig: tuiConfigTask,
-    backgroundSubagents: input.backgroundSubagents,
     onPermissionReply: async (next) => {
       if (state.demo?.permission(next)) {
         return
@@ -876,7 +873,6 @@ export async function runInteractiveDeferredMode(input: RunDeferredInput, deps?:
       files: input.files,
       initialInput: input.initialInput,
       thinking: input.thinking,
-      backgroundSubagents: input.backgroundSubagents,
       replay: input.replay,
       replayLimit: input.replayLimit,
       demo: input.demo,
@@ -928,7 +924,6 @@ export async function runInteractiveMode(
       files: input.files,
       initialInput: input.initialInput,
       thinking: input.thinking,
-      backgroundSubagents: input.backgroundSubagents,
       replay: input.replay,
       replayLimit: input.replayLimit,
       demo: input.demo,

packages/cli/src/mini/types.ts

@@ -135,7 +135,6 @@ export type RunInput = {
   files: RunFilePart[]
   initialInput?: string
   thinking: boolean
-  backgroundSubagents: boolean
   demo?: boolean
 }