Add tool output visibility preferences

src/App.tsx

@@ -41,7 +41,14 @@ import {
 
 const App: Component = () => {
   const { isDark } = useTheme()
-  const { preferences, addRecentFolder, toggleShowThinkingBlocks, setDiffViewMode } = useConfig()
+  const {
+    preferences,
+    addRecentFolder,
+    toggleShowThinkingBlocks,
+    setDiffViewMode,
+    setToolOutputExpansion,
+    setDiagnosticsExpansion,
+  } = useConfig()
   const [escapeInDebounce, setEscapeInDebounce] = createSignal(false)
   const [launchErrorBinary, setLaunchErrorBinary] = createSignal<string | null>(null)
   const [isAdvancedSettingsOpen, setIsAdvancedSettingsOpen] = createSignal(false)
@@ -195,6 +202,8 @@ const App: Component = () => {
     preferences,
     toggleShowThinkingBlocks,
     setDiffViewMode,
+    setToolOutputExpansion,
+    setDiagnosticsExpansion,
     handleNewInstanceRequest,
     handleCloseInstance,
     handleNewSession,

src/components/tool-call.tsx

@@ -347,7 +347,9 @@ export default function ToolCall(props: ToolCallProps) {
   const { isDark } = useTheme()
   const toolCallId = () => props.toolCallId || props.toolCall?.id || ""
   const expanded = () => isToolCallExpanded(toolCallId())
-  const [initializedId, setInitializedId] = createSignal<string | null>(null)
+  const toolOutputDefaultExpanded = createMemo(() => (preferences().toolOutputExpansion || "expanded") === "expanded")
+  const diagnosticsDefaultExpanded = createMemo(() => (preferences().diagnosticsExpansion || "expanded") === "expanded")
+  const [appliedPreference, setAppliedPreference] = createSignal<boolean | null>(null)
   const pendingPermission = createMemo(() => props.toolCall.pendingPermission)
   const permissionDetails = createMemo(() => pendingPermission()?.permission)
   const isPermissionActive = createMemo(() => pendingPermission()?.active === true)
@@ -357,7 +359,7 @@ export default function ToolCall(props: ToolCallProps) {
   })
   const [permissionSubmitting, setPermissionSubmitting] = createSignal(false)
   const [permissionError, setPermissionError] = createSignal<string | null>(null)
-  const [diagnosticsExpanded, setDiagnosticsExpanded] = createSignal(true)
+  const [diagnosticsExpanded, setDiagnosticsExpanded] = createSignal(diagnosticsDefaultExpanded())
   const diagnosticsEntries = createMemo(() => {
     const tool = props.toolCall?.tool || ""
     const state = props.toolCall?.state
@@ -365,13 +367,18 @@ export default function ToolCall(props: ToolCallProps) {
     return extractDiagnostics(tool, state)
   })
 
- 
-   let scrollContainerRef: HTMLDivElement | undefined
-   let toolCallRootRef: HTMLDivElement | undefined
- 
-   const handleScrollRendered = () => {
+  createEffect(() => {
+    const preferred = diagnosticsDefaultExpanded()
+    setDiagnosticsExpanded((prev) => (prev === preferred ? prev : preferred))
+  })
+
+  let scrollContainerRef: HTMLDivElement | undefined
+  let toolCallRootRef: HTMLDivElement | undefined
+ 
+  const handleScrollRendered = () => {
+ 
+   const id = toolCallId()
 
-    const id = toolCallId()
     if (!id || !scrollContainerRef) return
     restoreScrollState(id, scrollContainerRef)
   }
@@ -395,13 +402,18 @@ export default function ToolCall(props: ToolCallProps) {
 
   createEffect(() => {
     const id = toolCallId()
-    if (!id || initializedId() === id) return
+    if (!id) return
+    const toolName = props.toolCall?.tool || ""
+    const desiredExpansion = toolName === "read" ? false : toolOutputDefaultExpanded()
+    if (appliedPreference() === desiredExpansion) return
+    setToolCallExpanded(id, desiredExpansion)
+    setAppliedPreference(desiredExpansion)
+  })
 
-    const tool = props.toolCall?.tool || ""
-    const shouldExpand = tool !== "read"
-
-    setToolCallExpanded(id, shouldExpand)
-    setInitializedId(id)
+  createEffect(() => {
+    const id = toolCallId()
+    if (!id) return
+    setAppliedPreference((prev) => (prev === null ? prev : null))
   })
 
   createEffect(() => {

src/lib/hooks/use-commands.ts

@@ -1,6 +1,6 @@
 import { createSignal, onMount } from "solid-js"
 import type { Accessor } from "solid-js"
-import type { Preferences } from "../../stores/preferences"
+import type { Preferences, ExpansionPreference } from "../../stores/preferences"
 import { createCommandRegistry, type Command } from "../commands"
 import { instances, activeInstanceId, setActiveInstanceId } from "../../stores/instances"
 import {
@@ -17,6 +17,8 @@ export interface UseCommandsOptions {
   preferences: Accessor<Preferences>
   toggleShowThinkingBlocks: () => void
   setDiffViewMode: (mode: "split" | "unified") => void
+  setToolOutputExpansion: (mode: ExpansionPreference) => void
+  setDiagnosticsExpansion: (mode: ExpansionPreference) => void
   handleNewInstanceRequest: () => void
   handleCloseInstance: (instanceId: string) => Promise<void>
   handleNewSession: (instanceId: string) => Promise<void>
@@ -377,6 +379,38 @@ export function useCommands(options: UseCommandsOptions) {
       action: () => options.setDiffViewMode("unified"),
     })
 
+    commandRegistry.register({
+      id: "tool-output-default-visibility",
+      label: () => {
+        const mode = options.preferences().toolOutputExpansion || "expanded"
+        return `Tool Outputs Default · ${mode === "expanded" ? "Expanded" : "Collapsed"}`
+      },
+      description: "Toggle default expansion for tool outputs",
+      category: "System",
+      keywords: ["tool", "output", "expand", "collapse"],
+      action: () => {
+        const mode = options.preferences().toolOutputExpansion || "expanded"
+        const next: ExpansionPreference = mode === "expanded" ? "collapsed" : "expanded"
+        options.setToolOutputExpansion(next)
+      },
+    })
+
+    commandRegistry.register({
+      id: "diagnostics-default-visibility",
+      label: () => {
+        const mode = options.preferences().diagnosticsExpansion || "expanded"
+        return `Diagnostics Default · ${mode === "expanded" ? "Expanded" : "Collapsed"}`
+      },
+      description: "Toggle default expansion for diagnostics output",
+      category: "System",
+      keywords: ["diagnostics", "expand", "collapse"],
+      action: () => {
+        const mode = options.preferences().diagnosticsExpansion || "expanded"
+        const next: ExpansionPreference = mode === "expanded" ? "collapsed" : "expanded"
+        options.setDiagnosticsExpansion(next)
+      },
+    })
+
     commandRegistry.register({
       id: "help",
       label: "Show Help",

src/lib/storage.ts

@@ -83,6 +83,8 @@ export class FileStorage {
           modelRecents: [],
           agentModelSelections: {},
           diffViewMode: "split",
+          toolOutputExpansion: "expanded",
+          diagnosticsExpansion: "expanded",
         },
         recentFolders: [],
         opencodeBinaries: [],

src/stores/preferences.tsx

@@ -12,6 +12,7 @@ export interface AgentModelSelections {
 }
 
 export type DiffViewMode = "split" | "unified"
+export type ExpansionPreference = "expanded" | "collapsed"
 
 export interface Preferences {
   showThinkingBlocks: boolean
@@ -20,6 +21,8 @@ export interface Preferences {
   modelRecents?: ModelPreference[]
   agentModelSelections?: AgentModelSelections
   diffViewMode?: DiffViewMode
+  toolOutputExpansion?: ExpansionPreference
+  diagnosticsExpansion?: ExpansionPreference
 }
 
 export interface OpenCodeBinary {
@@ -41,6 +44,8 @@ const defaultPreferences: Preferences = {
   modelRecents: [],
   agentModelSelections: {},
   diffViewMode: "split",
+  toolOutputExpansion: "expanded",
+  diagnosticsExpansion: "expanded",
 }
 
 const [preferences, setPreferences] = createSignal<Preferences>(defaultPreferences)
@@ -117,6 +122,16 @@ function setDiffViewMode(mode: DiffViewMode): void {
   updatePreferences({ diffViewMode: mode })
 }
 
+function setToolOutputExpansion(mode: ExpansionPreference): void {
+  if (preferences().toolOutputExpansion === mode) return
+  updatePreferences({ toolOutputExpansion: mode })
+}
+
+function setDiagnosticsExpansion(mode: ExpansionPreference): void {
+  if (preferences().diagnosticsExpansion === mode) return
+  updatePreferences({ diagnosticsExpansion: mode })
+}
+
 function toggleShowThinkingBlocks(): void {
   updatePreferences({ showThinkingBlocks: !preferences().showThinkingBlocks })
 }
@@ -230,6 +245,8 @@ interface ConfigContextValue {
   opencodeBinaries: typeof opencodeBinaries
   toggleShowThinkingBlocks: typeof toggleShowThinkingBlocks
   setDiffViewMode: typeof setDiffViewMode
+  setToolOutputExpansion: typeof setToolOutputExpansion
+  setDiagnosticsExpansion: typeof setDiagnosticsExpansion
   addRecentFolder: typeof addRecentFolder
   removeRecentFolder: typeof removeRecentFolder
   addOpenCodeBinary: typeof addOpenCodeBinary
@@ -253,6 +270,8 @@ const configContextValue: ConfigContextValue = {
   opencodeBinaries,
   toggleShowThinkingBlocks,
   setDiffViewMode,
+  setToolOutputExpansion,
+  setDiagnosticsExpansion,
   addRecentFolder,
   removeRecentFolder,
   addOpenCodeBinary,
@@ -315,4 +334,6 @@ export {
   setAgentModelPreference,
   getAgentModelPreference,
   setDiffViewMode,
+  setToolOutputExpansion,
+  setDiagnosticsExpansion,
 }