feat: expose effort level setting in UI (#269)

Adds `--effort <level>` CLI flag support with a dropdown selector in the config sidebar. Valid options are low, medium, high, xhigh (Opus 4.7 only), and max.

src/lib/commands/slashCommands.ts

@@ -77,6 +77,7 @@ async function changeDirectory(path: string): Promise<void> {
         bare_mode: config.bare_mode ?? false,
         show_clear_context_on_plan_accept: config.show_clear_context_on_plan_accept ?? true,
         custom_model_option: config.custom_model_option || null,
+        effort_level: config.effort_level || null,
       },
     });
 
@@ -164,6 +165,7 @@ async function startNewConversation(): Promise<void> {
         bare_mode: config.bare_mode ?? false,
         show_clear_context_on_plan_accept: config.show_clear_context_on_plan_accept ?? true,
         custom_model_option: config.custom_model_option || null,
+        effort_level: config.effort_level || null,
       },
     });
 

src/lib/components/ConfigSidebar.svelte

@@ -78,6 +78,7 @@
     task_loop_auto_commit: false,
     task_loop_commit_prefix: "feat",
     task_loop_include_summary: false,
+    effort_level: null,
   });
 
   let showCustomThemeEditor = $state(false);
@@ -716,6 +717,29 @@
         </p>
       </div>
 
+      <!-- Effort Level -->
+      <div class="mb-4">
+        <label class="block text-sm text-[var(--text-primary)] mb-1" for="effort-level"
+          >Effort level</label
+        >
+        <select
+          id="effort-level"
+          bind:value={config.effort_level}
+          class="w-full px-3 py-2 rounded border border-[var(--border-color)] bg-[var(--bg-primary)] text-[var(--text-primary)] text-sm focus:outline-none focus:ring-1 focus:ring-[var(--accent-primary)]"
+        >
+          <option value={null}>Default (CLI decides)</option>
+          <option value="low">Low</option>
+          <option value="medium">Medium</option>
+          <option value="high">High</option>
+          <option value="xhigh">Extra High (Opus 4.7 only)</option>
+          <option value="max">Max</option>
+        </select>
+        <p class="text-xs text-[var(--text-tertiary)] mt-1">
+          Passes <code class="font-mono">--effort</code> to tune speed vs. intelligence. Requires Claude
+          Code v2.1.111+.
+        </p>
+      </div>
+
       <!-- Bare Mode -->
       <div class="mb-4">
         <label class="flex items-center gap-3 cursor-pointer">

src/lib/components/ElicitationModal.svelte

@@ -78,6 +78,7 @@
           bare_mode: config.bare_mode ?? false,
           show_clear_context_on_plan_accept: config.show_clear_context_on_plan_accept ?? true,
           custom_model_option: config.custom_model_option || null,
+          effort_level: config.effort_level || null,
         },
       });
 

src/lib/components/InputBar.svelte

@@ -412,6 +412,7 @@ User: ${formattedMessage}`;
               bare_mode: config.bare_mode ?? false,
               show_clear_context_on_plan_accept: config.show_clear_context_on_plan_accept ?? true,
               custom_model_option: config.custom_model_option || null,
+              effort_level: config.effort_level || null,
             },
           });
 

src/lib/components/PermissionModal.svelte

@@ -99,6 +99,7 @@
           bare_mode: config.bare_mode ?? false,
           show_clear_context_on_plan_accept: config.show_clear_context_on_plan_accept ?? true,
           custom_model_option: config.custom_model_option || null,
+          effort_level: config.effort_level || null,
         },
       });
 

src/lib/components/StatusBar.svelte

@@ -97,6 +97,7 @@
     bare_mode: false,
     show_clear_context_on_plan_accept: true,
     custom_model_option: null,
+    effort_level: null,
   });
 
   let streamerModeActive = $state(false);
@@ -189,6 +190,7 @@
           show_clear_context_on_plan_accept:
             currentConfig.show_clear_context_on_plan_accept ?? true,
           custom_model_option: currentConfig.custom_model_option || null,
+          effort_level: currentConfig.effort_level || null,
         },
       });
 
@@ -357,6 +359,7 @@
           show_clear_context_on_plan_accept:
             currentConfig.show_clear_context_on_plan_accept ?? true,
           custom_model_option: currentConfig.custom_model_option || null,
+          effort_level: currentConfig.effort_level || null,
         },
       });
 

src/lib/components/TaskLoopPanel.svelte

@@ -228,6 +228,7 @@
           bare_mode: cfg.bare_mode ?? false,
           show_clear_context_on_plan_accept: cfg.show_clear_context_on_plan_accept ?? true,
           custom_model_option: cfg.custom_model_option || null,
+          effort_level: cfg.effort_level || null,
         },
       });
     } catch (error) {

src/lib/components/UserQuestionModal.svelte

@@ -118,6 +118,7 @@
           bare_mode: config.bare_mode ?? false,
           show_clear_context_on_plan_accept: config.show_clear_context_on_plan_accept ?? true,
           custom_model_option: config.custom_model_option || null,
+          effort_level: config.effort_level || null,
         },
       });
 

src/lib/stores/config.test.ts

@@ -229,6 +229,7 @@ describe("config store", () => {
         bare_mode: false,
         show_clear_context_on_plan_accept: true,
         custom_model_option: null,
+        effort_level: null,
       };
 
       expect(config.model).toBe("claude-sonnet-4");
@@ -297,6 +298,7 @@ describe("config store", () => {
         bare_mode: false,
         show_clear_context_on_plan_accept: true,
         custom_model_option: null,
+        effort_level: null,
       };
 
       expect(config.model).toBeNull();
@@ -920,6 +922,7 @@ describe("config store", () => {
         bare_mode: false,
         show_clear_context_on_plan_accept: true,
         custom_model_option: null,
+        effort_level: null,
       };
 
       const mockInvokeImpl = vi.mocked(invoke);

src/lib/stores/config.ts

@@ -99,6 +99,8 @@ export interface HikariConfig {
   show_clear_context_on_plan_accept: boolean;
   // Custom model option env var (v2.1.81+)
   custom_model_option: string | null;
+  // Effort level for Claude Code (v2.1.111+) — null means use CLI default
+  effort_level: string | null;
 }
 
 const defaultConfig: HikariConfig = {
@@ -161,6 +163,7 @@ const defaultConfig: HikariConfig = {
   bare_mode: false,
   show_clear_context_on_plan_accept: true,
   custom_model_option: null,
+  effort_level: null,
 };
 
 function createConfigStore() {