diff --git a/packages/server/src/config/schema.ts b/packages/server/src/config/schema.ts
index c4781113..b26062ef 100644
--- a/packages/server/src/config/schema.ts
+++ b/packages/server/src/config/schema.ts
@@ -26,6 +26,7 @@ const PreferencesSchema = z
   showUsageMetrics: z.boolean().default(true),
   autoCleanupBlankSessions: z.boolean().default(true),
   listeningMode: z.enum(["local", "all"]).default("local"),
+  logLevel: z.enum(["DEBUG", "INFO", "WARN", "ERROR"]).default("DEBUG"),
 
   // OS notifications
   osNotificationsEnabled: z.boolean().default(false),
diff --git a/packages/server/src/settings/migrate.ts b/packages/server/src/settings/migrate.ts
index e693a96d..d734ea3e 100644
--- a/packages/server/src/settings/migrate.ts
+++ b/packages/server/src/settings/migrate.ts
@@ -107,6 +107,10 @@ function mapLegacyToOwnerDocs(legacyConfig: unknown, legacyState: unknown): { co
     if (typeof listeningMode === "string") {
       serverConfig.listeningMode = listeningMode
     }
+    const logLevel = preferences.logLevel
+    if (typeof logLevel === "string") {
+      serverConfig.logLevel = logLevel
+    }
     const lastUsedBinary = preferences.lastUsedBinary
     if (typeof lastUsedBinary === "string") {
       serverConfig.opencodeBinary = lastUsedBinary
@@ -135,6 +139,7 @@ function mapLegacyToOwnerDocs(legacyConfig: unknown, legacyState: unknown): { co
     const moved = new Set([
       "environmentVariables",
       "listeningMode",
+      "logLevel",
       "lastUsedBinary",
       "modelRecents",
       "modelFavorites",
diff --git a/packages/server/src/settings/service.ts b/packages/server/src/settings/service.ts
index 45924076..f4f0409c 100644
--- a/packages/server/src/settings/service.ts
+++ b/packages/server/src/settings/service.ts
@@ -1,6 +1,7 @@
 import type { Logger } from "../logger"
 import type { EventBus } from "../events/bus"
 import type { ConfigLocation } from "../config/location"
+import { z } from "zod"
 import { YamlDocStore, type SettingsDoc } from "./yaml-doc-store"
 import { migrateSettingsLayout } from "./migrate"
 import type { WorkspaceEventPayload } from "../api-types"
@@ -8,6 +9,54 @@ import { sanitizeConfigOwner } from "./public-config"
 
 export type DocKind = "config" | "state"
 
+const CanonicalLogLevelSchema = z.preprocess(
+  (value) => (typeof value === "string" ? value.trim().toUpperCase() : value),
+  z.enum(["DEBUG", "INFO", "WARN", "ERROR"]),
+)
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value)
+}
+
+function isDeepEqual(a: unknown, b: unknown): boolean {
+  if (a === b) return true
+  try {
+    return JSON.stringify(a) === JSON.stringify(b)
+  } catch {
+    return false
+  }
+}
+
+function normalizeServerConfigOwner(value: SettingsDoc): SettingsDoc {
+  if (!isPlainObject(value)) {
+    return {}
+  }
+
+  const next: SettingsDoc = { ...value }
+  const parsedLogLevel = CanonicalLogLevelSchema.safeParse(next.logLevel)
+  if (parsedLogLevel.success) {
+    next.logLevel = parsedLogLevel.data
+  } else if (next.logLevel !== undefined) {
+    next.logLevel = "DEBUG"
+  }
+  return next
+}
+
+function normalizeConfigDoc(doc: SettingsDoc): SettingsDoc {
+  if (!isPlainObject(doc)) {
+    return {}
+  }
+
+  if (!isPlainObject(doc.server)) {
+    return doc
+  }
+
+  return {
+    ...doc,
+    server: normalizeServerConfigOwner(doc.server as SettingsDoc),
+  }
+}
+
 export class SettingsService {
   private readonly configStore: YamlDocStore
   private readonly stateStore: YamlDocStore
@@ -23,22 +72,44 @@ export class SettingsService {
   }
 
   getDoc(kind: DocKind): SettingsDoc {
-    return kind === "config" ? this.configStore.get() : this.stateStore.get()
+    if (kind !== "config") {
+      return this.stateStore.get()
+    }
+
+    const current = this.configStore.get()
+    const normalized = normalizeConfigDoc(current)
+    if (!isDeepEqual(current, normalized)) {
+      this.configStore.replace(normalized)
+    }
+    return normalized
   }
 
   mergePatchDoc(kind: DocKind, patch: unknown): SettingsDoc {
-    const updated = kind === "config" ? this.configStore.mergePatch(patch) : this.stateStore.mergePatch(patch)
+    const updated =
+      kind === "config"
+        ? this.configStore.replace(normalizeConfigDoc(this.configStore.mergePatch(patch)))
+        : this.stateStore.mergePatch(patch)
     this.publish(kind, "*")
     return updated
   }
 
   getOwner(kind: DocKind, owner: string): SettingsDoc {
-    return kind === "config" ? this.configStore.getOwner(owner) : this.stateStore.getOwner(owner)
+    if (kind !== "config") {
+      return this.stateStore.getOwner(owner)
+    }
+
+    return owner === "server"
+      ? normalizeServerConfigOwner(this.getDoc("config").server as SettingsDoc)
+      : this.getDoc("config")[owner] as SettingsDoc
   }
 
   mergePatchOwner(kind: DocKind, owner: string, patch: unknown): SettingsDoc {
     const updated =
-      kind === "config" ? this.configStore.mergePatchOwner(owner, patch) : this.stateStore.mergePatchOwner(owner, patch)
+      kind === "config"
+        ? owner === "server"
+          ? this.configStore.replaceOwner(owner, normalizeServerConfigOwner(this.configStore.mergePatchOwner(owner, patch)))
+          : this.configStore.mergePatchOwner(owner, patch)
+        : this.stateStore.mergePatchOwner(owner, patch)
     this.publish(kind, owner, updated)
     return updated
   }
diff --git a/packages/server/src/workspaces/manager.ts b/packages/server/src/workspaces/manager.ts
index 805b8f95..dc939758 100644
--- a/packages/server/src/workspaces/manager.ts
+++ b/packages/server/src/workspaces/manager.ts
@@ -142,12 +142,15 @@ export class WorkspaceManager {
       [OPENCODE_SERVER_PASSWORD_ENV]: opencodePassword,
     }
 
+    const logLevel = (serverConfig as any)?.logLevel
+
     try {
       const { pid, port, exitPromise, getLastOutput } = await this.runtime.launch({
         workspaceId: id,
         folder: workspacePath,
         binaryPath: resolvedBinaryPath,
         environment,
+        logLevel,
         onExit: (info) => this.handleProcessExit(info.workspaceId, info),
       })
 
diff --git a/packages/server/src/workspaces/runtime.ts b/packages/server/src/workspaces/runtime.ts
index 0246fbfd..1269f0b7 100644
--- a/packages/server/src/workspaces/runtime.ts
+++ b/packages/server/src/workspaces/runtime.ts
@@ -116,6 +116,7 @@ interface LaunchOptions {
   folder: string
   binaryPath: string
   environment?: Record<string, string>
+  logLevel?: string
   onExit?: (info: ProcessExitInfo) => void
 }
 
@@ -139,7 +140,8 @@ export class WorkspaceRuntime {
   async launch(options: LaunchOptions): Promise<{ pid: number; port: number; exitPromise: Promise<ProcessExitInfo>; getLastOutput: () => string }> {
     this.validateFolder(options.folder)
 
-    const args = ["serve", "--port", "0", "--print-logs", "--log-level", "DEBUG"]
+    const logLevel = typeof options.logLevel === "string" ? options.logLevel.toUpperCase() : "DEBUG"
+    const args = ["serve", "--port", "0", "--print-logs", "--log-level", logLevel]
     const env = { ...process.env, ...(options.environment ?? {}) }
 
     let exitResolve: ((info: ProcessExitInfo) => void) | null = null
diff --git a/packages/ui/src/components/settings/opencode-settings-section.tsx b/packages/ui/src/components/settings/opencode-settings-section.tsx
index 8af940eb..8c0bc01b 100644
--- a/packages/ui/src/components/settings/opencode-settings-section.tsx
+++ b/packages/ui/src/components/settings/opencode-settings-section.tsx
@@ -1,14 +1,30 @@
-import { createEffect, createSignal, type Component } from "solid-js"
-import { Terminal } from "lucide-solid"
+import { Select } from "@kobalte/core/select"
+import { createEffect, createMemo, createSignal, type Component } from "solid-js"
+import { ChevronDown, Terminal } from "lucide-solid"
 import OpenCodeBinarySelector from "../opencode-binary-selector"
 import EnvironmentVariablesEditor from "../environment-variables-editor"
 import { useConfig } from "../../stores/preferences"
+import type { ServerLogLevel } from "../../stores/preferences"
 import { useI18n } from "../../lib/i18n"
 
+type LogLevelOption = {
+  value: ServerLogLevel
+  label: string
+}
+
 export const OpenCodeSettingsSection: Component = () => {
   const { t } = useI18n()
-  const { serverSettings, updateLastUsedBinary } = useConfig()
+  const { serverSettings, updateLastUsedBinary, updateLogLevel } = useConfig()
   const [selectedBinary, setSelectedBinary] = createSignal(serverSettings().opencodeBinary || "opencode")
+  const logLevelOptions = createMemo<LogLevelOption[]>(() => [
+    { value: "DEBUG", label: t("settings.opencode.logLevel.option.debug") },
+    { value: "INFO", label: t("settings.opencode.logLevel.option.info") },
+    { value: "WARN", label: t("settings.opencode.logLevel.option.warn") },
+    { value: "ERROR", label: t("settings.opencode.logLevel.option.error") },
+  ])
+  const selectedLogLevel = createMemo(
+    () => logLevelOptions().find((option) => option.value === serverSettings().logLevel) ?? logLevelOptions()[0],
+  )
 
   createEffect(() => {
     const binary = serverSettings().opencodeBinary || "opencode"
@@ -37,6 +53,60 @@ export const OpenCodeSettingsSection: Component = () => {
         <OpenCodeBinarySelector selectedBinary={selectedBinary()} onBinaryChange={handleBinaryChange} isVisible />
       </div>
 
+      <div class="settings-card">
+        <div class="settings-card-header">
+          <div>
+            <h3 class="settings-card-title">{t("settings.opencode.logLevel.title")}</h3>
+            <p class="settings-card-subtitle">{t("settings.opencode.logLevel.subtitle")}</p>
+          </div>
+          <span class="settings-scope-badge settings-scope-badge-server">{t("settings.scope.server")}</span>
+        </div>
+        <div class="settings-card-body">
+          <div class="settings-toggle-row settings-toggle-row-compact">
+            <div>
+              <div class="settings-toggle-title">{t("settings.opencode.logLevel.selector.title")}</div>
+              <div class="settings-toggle-caption">{t("settings.opencode.logLevel.selector.subtitle")}</div>
+            </div>
+            <Select<LogLevelOption>
+              value={selectedLogLevel()}
+              onChange={(option) => {
+                if (!option) return
+                updateLogLevel(option.value)
+              }}
+              options={logLevelOptions()}
+              optionValue="value"
+              optionTextValue="label"
+              itemComponent={(itemProps) => (
+                <Select.Item item={itemProps.item} class="selector-option">
+                  <Select.ItemLabel class="selector-option-label">{itemProps.item.rawValue.label}</Select.ItemLabel>
+                </Select.Item>
+              )}
+            >
+              <Select.Trigger class="selector-trigger" aria-label={t("settings.opencode.logLevel.title")}>
+                <div class="flex-1 min-w-0">
+                  <Select.Value<LogLevelOption>>
+                    {(state) => (
+                      <span class="selector-trigger-primary selector-trigger-primary--align-left">
+                        {state.selectedOption()?.label}
+                      </span>
+                    )}
+                  </Select.Value>
+                </div>
+                <Select.Icon class="selector-trigger-icon">
+                  <ChevronDown class="w-3 h-3" />
+                </Select.Icon>
+              </Select.Trigger>
+
+              <Select.Portal>
+                <Select.Content class="selector-popover">
+                  <Select.Listbox class="selector-listbox" />
+                </Select.Content>
+              </Select.Portal>
+            </Select>
+          </div>
+        </div>
+      </div>
+
       <div class="settings-card">
         <div class="settings-card-header">
           <div>
diff --git a/packages/ui/src/lib/i18n/messages/en/settings.ts b/packages/ui/src/lib/i18n/messages/en/settings.ts
index bdd4a710..a81e4e4f 100644
--- a/packages/ui/src/lib/i18n/messages/en/settings.ts
+++ b/packages/ui/src/lib/i18n/messages/en/settings.ts
@@ -113,6 +113,15 @@ export const settingsMessages = {
   "settings.section.opencode.subtitle": "Choose the OpenCode binary and environment used for new instances.",
   "settings.opencode.runtime.title": "Runtime",
   "settings.opencode.runtime.subtitle": "Configure which OpenCode binary new instances launch with.",
+  "settings.opencode.logLevel.title": "OpenCode Log Level",
+  "settings.opencode.logLevel.subtitle": "Control the log verbosity used when launching new OpenCode instances.",
+  "settings.opencode.logLevel.selector.title": "Default log level",
+  "settings.opencode.logLevel.selector.subtitle": "Choose how verbose new OpenCode instances should be.",
+  "settings.opencode.logLevel.option.debug": "Debug",
+  "settings.opencode.logLevel.option.info": "Info",
+  "settings.opencode.logLevel.option.warn": "Warn",
+  "settings.opencode.logLevel.option.error": "Error",
+
 
   "settings.appearance.behavior.title": "Interaction",
   "settings.appearance.behavior.subtitle": "Message, diff, and input defaults.",
diff --git a/packages/ui/src/lib/i18n/messages/es/settings.ts b/packages/ui/src/lib/i18n/messages/es/settings.ts
index ea17bb48..8c3210d6 100644
--- a/packages/ui/src/lib/i18n/messages/es/settings.ts
+++ b/packages/ui/src/lib/i18n/messages/es/settings.ts
@@ -113,6 +113,14 @@ export const settingsMessages = {
   "settings.section.opencode.subtitle": "Choose the OpenCode binary and environment used for new instances.",
   "settings.opencode.runtime.title": "Runtime",
   "settings.opencode.runtime.subtitle": "Configure which OpenCode binary new instances launch with.",
+  "settings.opencode.logLevel.title": "Nivel de logs de OpenCode",
+  "settings.opencode.logLevel.subtitle": "Define el nivel de logs usado al iniciar nuevas instancias de OpenCode.",
+  "settings.opencode.logLevel.selector.title": "Verbosidad de logs",
+  "settings.opencode.logLevel.selector.subtitle": "Elige cuanta informacion deben registrar las nuevas instancias de OpenCode.",
+  "settings.opencode.logLevel.option.debug": "Depuracion",
+  "settings.opencode.logLevel.option.info": "Informacion",
+  "settings.opencode.logLevel.option.warn": "Advertencia",
+  "settings.opencode.logLevel.option.error": "Error",
 
   "settings.appearance.behavior.title": "Interaccion",
   "settings.appearance.behavior.subtitle": "Valores predeterminados de mensajes, diffs y entrada.",
diff --git a/packages/ui/src/lib/i18n/messages/fr/settings.ts b/packages/ui/src/lib/i18n/messages/fr/settings.ts
index 5a543305..cf9ed3ed 100644
--- a/packages/ui/src/lib/i18n/messages/fr/settings.ts
+++ b/packages/ui/src/lib/i18n/messages/fr/settings.ts
@@ -113,6 +113,14 @@ export const settingsMessages = {
   "settings.section.opencode.subtitle": "Choose the OpenCode binary and environment used for new instances.",
   "settings.opencode.runtime.title": "Runtime",
   "settings.opencode.runtime.subtitle": "Configure which OpenCode binary new instances launch with.",
+  "settings.opencode.logLevel.title": "Niveau de logs OpenCode",
+  "settings.opencode.logLevel.subtitle": "Definir le niveau de logs utilise au lancement des nouvelles instances OpenCode.",
+  "settings.opencode.logLevel.selector.title": "Verbosite des logs",
+  "settings.opencode.logLevel.selector.subtitle": "Choisir la quantite de journaux emise par les nouvelles instances OpenCode.",
+  "settings.opencode.logLevel.option.debug": "Debogage",
+  "settings.opencode.logLevel.option.info": "Info",
+  "settings.opencode.logLevel.option.warn": "Avertissement",
+  "settings.opencode.logLevel.option.error": "Erreur",
 
   "settings.appearance.behavior.title": "Interaction",
   "settings.appearance.behavior.subtitle": "Parametres par defaut pour les messages, les diffs et la saisie.",
diff --git a/packages/ui/src/lib/i18n/messages/he/settings.ts b/packages/ui/src/lib/i18n/messages/he/settings.ts
index 534a6d30..836dce28 100644
--- a/packages/ui/src/lib/i18n/messages/he/settings.ts
+++ b/packages/ui/src/lib/i18n/messages/he/settings.ts
@@ -112,6 +112,14 @@ export const settingsMessages = {
   "settings.section.opencode.subtitle": "בחר את הקובץ הבינארי של OpenCode והסביבה לשימוש במופעים חדשים.",
   "settings.opencode.runtime.title": "סביבת ריצה",
   "settings.opencode.runtime.subtitle": "הגדר עם איזה קובץ בינארי של OpenCode מופעים חדשים יופעלו.",
+  "settings.opencode.logLevel.title": "רמת הלוגים של OpenCode",
+  "settings.opencode.logLevel.subtitle": "הגדר את רמת הלוגים שבה ייעשה שימוש בעת הפעלת מופעי OpenCode חדשים.",
+  "settings.opencode.logLevel.selector.title": "פירוט לוגים",
+  "settings.opencode.logLevel.selector.subtitle": "בחר כמה לוגים מופעי OpenCode חדשים צריכים להפיק.",
+  "settings.opencode.logLevel.option.debug": "ניפוי שגיאות",
+  "settings.opencode.logLevel.option.info": "מידע",
+  "settings.opencode.logLevel.option.warn": "אזהרה",
+  "settings.opencode.logLevel.option.error": "שגיאה",
 
   "settings.appearance.behavior.title": "אינטראקציה",
   "settings.appearance.behavior.subtitle": "ברירות מחדל להודעות, diff וקלט.",
diff --git a/packages/ui/src/lib/i18n/messages/ja/settings.ts b/packages/ui/src/lib/i18n/messages/ja/settings.ts
index 9373a8ca..6eedf011 100644
--- a/packages/ui/src/lib/i18n/messages/ja/settings.ts
+++ b/packages/ui/src/lib/i18n/messages/ja/settings.ts
@@ -113,6 +113,14 @@ export const settingsMessages = {
   "settings.section.opencode.subtitle": "Choose the OpenCode binary and environment used for new instances.",
   "settings.opencode.runtime.title": "Runtime",
   "settings.opencode.runtime.subtitle": "Configure which OpenCode binary new instances launch with.",
+  "settings.opencode.logLevel.title": "OpenCode のログレベル",
+  "settings.opencode.logLevel.subtitle": "新しい OpenCode インスタンスの起動時に使うログレベルを設定します。",
+  "settings.opencode.logLevel.selector.title": "ログ出力の詳細度",
+  "settings.opencode.logLevel.selector.subtitle": "新しい OpenCode インスタンスがどの程度ログを出力するかを選択します。",
+  "settings.opencode.logLevel.option.debug": "デバッグ",
+  "settings.opencode.logLevel.option.info": "情報",
+  "settings.opencode.logLevel.option.warn": "警告",
+  "settings.opencode.logLevel.option.error": "エラー",
 
   "settings.appearance.behavior.title": "操作",
   "settings.appearance.behavior.subtitle": "メッセージ、差分、入力の既定値。",
diff --git a/packages/ui/src/lib/i18n/messages/ru/settings.ts b/packages/ui/src/lib/i18n/messages/ru/settings.ts
index 2b3e0fa1..656b4692 100644
--- a/packages/ui/src/lib/i18n/messages/ru/settings.ts
+++ b/packages/ui/src/lib/i18n/messages/ru/settings.ts
@@ -113,6 +113,14 @@ export const settingsMessages = {
   "settings.section.opencode.subtitle": "Choose the OpenCode binary and environment used for new instances.",
   "settings.opencode.runtime.title": "Runtime",
   "settings.opencode.runtime.subtitle": "Configure which OpenCode binary new instances launch with.",
+  "settings.opencode.logLevel.title": "Уровень логирования OpenCode",
+  "settings.opencode.logLevel.subtitle": "Задайте уровень логирования, используемый при запуске новых экземпляров OpenCode.",
+  "settings.opencode.logLevel.selector.title": "Подробность логов",
+  "settings.opencode.logLevel.selector.subtitle": "Выберите, сколько логов должны выводить новые экземпляры OpenCode.",
+  "settings.opencode.logLevel.option.debug": "Отладка",
+  "settings.opencode.logLevel.option.info": "Информация",
+  "settings.opencode.logLevel.option.warn": "Предупреждение",
+  "settings.opencode.logLevel.option.error": "Ошибка",
 
   "settings.appearance.behavior.title": "Взаимодействие",
   "settings.appearance.behavior.subtitle": "Значения по умолчанию для сообщений, диффов и ввода.",
diff --git a/packages/ui/src/lib/i18n/messages/zh-Hans/settings.ts b/packages/ui/src/lib/i18n/messages/zh-Hans/settings.ts
index 75303a7b..ec79a1f2 100644
--- a/packages/ui/src/lib/i18n/messages/zh-Hans/settings.ts
+++ b/packages/ui/src/lib/i18n/messages/zh-Hans/settings.ts
@@ -113,6 +113,14 @@ export const settingsMessages = {
   "settings.section.opencode.subtitle": "Choose the OpenCode binary and environment used for new instances.",
   "settings.opencode.runtime.title": "Runtime",
   "settings.opencode.runtime.subtitle": "Configure which OpenCode binary new instances launch with.",
+  "settings.opencode.logLevel.title": "OpenCode 日志级别",
+  "settings.opencode.logLevel.subtitle": "设置启动新的 OpenCode 实例时使用的日志级别。",
+  "settings.opencode.logLevel.selector.title": "日志详细程度",
+  "settings.opencode.logLevel.selector.subtitle": "选择新的 OpenCode 实例应输出多少日志信息。",
+  "settings.opencode.logLevel.option.debug": "调试",
+  "settings.opencode.logLevel.option.info": "信息",
+  "settings.opencode.logLevel.option.warn": "警告",
+  "settings.opencode.logLevel.option.error": "错误",
 
   "settings.appearance.behavior.title": "交互",
   "settings.appearance.behavior.subtitle": "消息、差异与输入的默认值。",
diff --git a/packages/ui/src/stores/preferences.tsx b/packages/ui/src/stores/preferences.tsx
index 0d4cff6e..a1ef1c72 100644
--- a/packages/ui/src/stores/preferences.tsx
+++ b/packages/ui/src/stores/preferences.tsx
@@ -28,6 +28,7 @@ export type DiffViewMode = "split" | "unified"
 export type ExpansionPreference = "expanded" | "collapsed"
 export type ToolInputsVisibilityPreference = "hidden" | "collapsed" | "expanded"
 export type ListeningMode = "local" | "all"
+export type ServerLogLevel = "DEBUG" | "INFO" | "WARN" | "ERROR"
 export type SpeechProviderPreference = "openai-compatible"
 export type SpeechPlaybackMode = "streaming" | "buffered"
 export type SpeechTtsFormat = "mp3" | "wav" | "opus" | "aac"
@@ -94,6 +95,7 @@ interface UiConfigBucket {
 
 interface ServerConfigBucket {
   listeningMode?: ListeningMode
+  logLevel?: ServerLogLevel
   environmentVariables?: Record<string, string>
   opencodeBinary?: string
   speech?: Partial<SpeechSettings>
@@ -272,13 +274,17 @@ function normalizeUiState(input?: UiStateBucket | null): NormalizedUiState {
 
 function normalizeServerConfig(
   input?: ServerConfigBucket | null,
-): Required<Pick<ServerConfigBucket, "listeningMode" | "environmentVariables" | "opencodeBinary">> & { speech: SpeechSettings } {
+): Required<Pick<ServerConfigBucket, "listeningMode" | "logLevel" | "environmentVariables" | "opencodeBinary">> & { speech: SpeechSettings } {
   const source = input ?? {}
   const listeningMode = source.listeningMode === "all" ? "all" : "local"
+  const logLevel =
+    source.logLevel === "INFO" || source.logLevel === "WARN" || source.logLevel === "ERROR" || source.logLevel === "DEBUG"
+      ? source.logLevel
+      : "DEBUG"
   const opencodeBinary = typeof source.opencodeBinary === "string" && source.opencodeBinary.trim() ? source.opencodeBinary : "opencode"
   const environmentVariables = normalizeRecord(source.environmentVariables)
   const speech = normalizeSpeechSettings(source.speech)
-  return { listeningMode, opencodeBinary, environmentVariables, speech }
+  return { listeningMode, logLevel, opencodeBinary, environmentVariables, speech }
 }
 
 function getModelKey(model: { providerId: string; modelId: string }): string {
@@ -409,6 +415,11 @@ function updateLastUsedBinary(path: string): void {
   void patchStateOwner("ui", { opencodeBinaries: nextList }).catch((error) => log.error("Failed to update binary list", error))
 }
 
+function updateLogLevel(level: ServerLogLevel): void {
+  const target = level ?? "DEBUG"
+  void patchConfigOwner("server", { logLevel: target }).catch((error) => log.error("Failed to set log level", error))
+}
+
 async function updateSpeechSettings(updates: SpeechSettingsUpdate): Promise<void> {
   const apiKeyPatch = updates.apiKey
   const { apiKey: _apiKey, ...restUpdates } = updates
@@ -612,8 +623,9 @@ interface ConfigContextValue {
   updateEnvironmentVariables: typeof updateEnvironmentVariables
   addEnvironmentVariable: typeof addEnvironmentVariable
   removeEnvironmentVariable: typeof removeEnvironmentVariable
-  updateLastUsedBinary: typeof updateLastUsedBinary
-  updateSpeechSettings: typeof updateSpeechSettings
+    updateLastUsedBinary: typeof updateLastUsedBinary
+    updateLogLevel: typeof updateLogLevel
+    updateSpeechSettings: typeof updateSpeechSettings
 
   // ui-owned state
   recentFolders: typeof recentFolders
@@ -663,6 +675,7 @@ const configContextValue: ConfigContextValue = {
   addEnvironmentVariable,
   removeEnvironmentVariable,
   updateLastUsedBinary,
+  updateLogLevel,
   updateSpeechSettings,
   recentFolders,
   opencodeBinaries,
@@ -746,6 +759,7 @@ export {
   addEnvironmentVariable,
   removeEnvironmentVariable,
   updateLastUsedBinary,
+  updateLogLevel,
   updateSpeechSettings,
   addRecentFolder,
   removeRecentFolder,