feat(coding-agent): supported omitting thinking summaries

- Added `omitThinking` setting to allow instruction of upstream providers to omit thinking summaries.
- Decoupled UI-level thinking block visibility from backend data retrieval.
- Updated session creation to use `omitThinking` for configuring provider-side summaries.

packages/coding-agent/src/config/settings-schema.ts

@@ -900,6 +900,18 @@ export const SETTINGS_SCHEMA = {
 		},
 	},
 
+	omitThinking: {
+		type: "boolean",
+		default: false,
+		ui: {
+			tab: "model",
+			group: "Thinking",
+			label: "Omit Thinking summaries",
+			description:
+				"Instruct upstream providers to completely omit thinking summaries from responses (where supported)",
+		},
+	},
+
 	"model.loopGuard.enabled": {
 		type: "boolean",
 		default: true,

packages/coding-agent/src/main.ts

@@ -1056,11 +1056,11 @@ export async function runRootCommand(
 	}
 
 	// --print-thoughts (single-shot print mode) must surface reasoning, so un-hide
-	// thinking before the session is built — otherwise a passive hideThinkingBlock
+	// thinking before the session is built — otherwise a passive omitThinking
 	// setting makes the provider omit summaries and the flag prints nothing. An
-	// explicit --hide-thinking below still wins.
+	// explicit --hide-thinking block display option still wins for output display.
 	if (parsedArgs.printThoughts && !isProtocolMode && !isInteractive) {
-		settingsInstance.override("hideThinkingBlock", false);
+		settingsInstance.override("omitThinking", false);
 	}
 	// Apply --hide-thinking CLI flag (ephemeral, not persisted)
 	if (parsedArgs.hideThinking) {

packages/coding-agent/src/modes/controllers/input-controller.ts

@@ -1524,7 +1524,6 @@ export class InputController {
 	toggleThinkingBlockVisibility(): void {
 		this.ctx.hideThinkingBlock = !this.ctx.hideThinkingBlock;
 		this.ctx.settings.set("hideThinkingBlock", this.ctx.hideThinkingBlock);
-		this.ctx.session.agent.hideThinkingSummary = this.ctx.hideThinkingBlock;
 
 		for (const child of this.ctx.chatContainer.children) {
 			if (child instanceof AssistantMessageComponent) {

packages/coding-agent/src/modes/controllers/selector-controller.ts

@@ -314,9 +314,8 @@ export class SelectorController {
 					}
 				}
 				break;
-			case "hideThinking":
+			case "hideThinkingBlock":
 				this.ctx.hideThinkingBlock = value as boolean;
-				this.ctx.session.agent.hideThinkingSummary = value as boolean;
 				for (const child of this.ctx.chatContainer.children) {
 					if (child instanceof AssistantMessageComponent) {
 						child.setHideThinkingBlock(value as boolean);
@@ -327,6 +326,9 @@ export class SelectorController {
 				// InputController.toggleThinkingBlockVisibility).
 				this.ctx.ui.resetDisplay();
 				break;
+			case "omitThinking":
+				this.ctx.session.agent.hideThinkingSummary = value as boolean;
+				break;
 			case "display.cacheMissMarker":
 				// Rebuild re-runs the usage-based detection under the new setting so
 				// markers appear/disappear; full reset retires any already committed

packages/coding-agent/src/sdk.ts

@@ -2474,7 +2474,7 @@ export async function createAgentSession(options: CreateAgentSessionOptions = {}
 			presencePenalty: settings.get("presencePenalty") >= 0 ? settings.get("presencePenalty") : undefined,
 			repetitionPenalty: settings.get("repetitionPenalty") >= 0 ? settings.get("repetitionPenalty") : undefined,
 			serviceTier: initialServiceTier,
-			hideThinkingSummary: settings.get("hideThinkingBlock"),
+			hideThinkingSummary: settings.get("omitThinking"),
 			kimiApiFormat: settings.get("providers.kimiApiFormat") ?? "anthropic",
 			preferWebsockets: preferOpenAICodexWebsockets,
 			getToolContext: tc => toolContextStore.getContext(tc),

packages/coding-agent/test/input-controller-thinking-visibility.test.ts

@@ -33,7 +33,7 @@ describe("InputController thinking visibility", () => {
 
 		expect(ctx.hideThinkingBlock).toBe(true);
 		expect(set).toHaveBeenCalledWith("hideThinkingBlock", true);
-		expect(ctx.session.agent.hideThinkingSummary).toBe(true);
+		expect(ctx.session.agent.hideThinkingSummary).toBe(false);
 		expect(chatContainer.children).toEqual([pendingUserMessage, assistant, loadingIndicator]);
 		expect(clear).not.toHaveBeenCalled();
 		expect(addChild).not.toHaveBeenCalled();