feat(ai): add Z.AI GLM-5.3

packages/ai/changes.md

@@ -1,5 +1,9 @@
 # changes.md — ai
 
+## 2026-08-29 - Z.AI GLM-5.3 request and catalog fixes
+
+- GLM-5.3 reasoning-off requests now use the provider's lowest enabled effort instead of sending the rejected disabled-thinking payload; regenerated Z.AI catalogs retain the separate global and China sources and published model metadata.
+
 ## Credential pool export wildcard (2026-08-27)
 
 ### What changed

packages/ai/src/providers/data/.manifest.json

@@ -1 +1 @@
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packages/ai/test/openai-completions-tool-choice.test.ts

@@ -372,6 +372,7 @@ describe("openai-completions tool_choice", () => {
 		expect(getModel("zai", "glm-4.7")?.compat?.zaiToolStream).toBe(true);
 		expect(getModel("zai", "glm-5-turbo")?.compat?.zaiToolStream).toBe(true);
 		expect(getModel("zai", "glm-5.2")?.compat?.zaiToolStream).toBe(true);
+		expect(getModel("zai", "glm-5.3")?.compat?.zaiToolStream).toBe(true);
 	});
 
 	it("stores z.ai effort metadata", () => {
@@ -403,6 +404,84 @@ describe("openai-completions tool_choice", () => {
 			});
 		}
 	});
+	it("stores z.ai GLM-5.3 catalog and effort metadata", () => {
+		for (const provider of ["zai", "zai-coding-cn"] as const) {
+			const model = getModel(provider, "glm-5.3")!;
+			expect(model).toMatchObject({
+				name: "GLM-5.3",
+				reasoning: true,
+				input: ["text"],
+				contextWindow: 1_000_000,
+				maxTokens: 131_072,
+			});
+			expect(model.compat?.supportsReasoningEffort).toBe(true);
+			expect(model.thinkingLevelMap).toEqual({
+				off: null,
+				minimal: null,
+				low: "low",
+				medium: null,
+				high: "high",
+				xhigh: null,
+				max: "max",
+			});
+		}
+	});
+
+	it("maps z.ai GLM-5.3 thinking levels to reasoning_effort", async () => {
+		const model = getModel("zai", "glm-5.3")!;
+		const cases = [
+			{ reasoning: "low", effort: "low" },
+			{ reasoning: "medium", effort: "high" },
+			{ reasoning: "high", effort: "high" },
+			{ reasoning: "xhigh", effort: "max" },
+			{ reasoning: "max", effort: "max" },
+		] as const;
+
+		for (const testCase of cases) {
+			let payload: unknown;
+
+			await streamSimple(
+				model,
+				{
+					messages: [{ role: "user", content: "Hi", timestamp: Date.now() }],
+				},
+				{
+					apiKey: "test",
+					reasoning: testCase.reasoning,
+					onPayload: (params: unknown) => {
+						payload = params;
+					},
+				},
+			).result();
+
+			const params = (payload ?? mockState.lastParams) as { thinking?: unknown; reasoning_effort?: string };
+			expect(params.thinking).toEqual({ type: "enabled", clear_thinking: false });
+			expect(params.reasoning_effort).toBe(testCase.effort);
+		}
+	});
+
+	it("does not send disabled thinking for GLM-5.3 when reasoning is off through streamSimple", async () => {
+		const model = getModel("zai", "glm-5.3")!;
+		let payload: unknown;
+
+		await streamSimple(
+			model,
+			{
+				messages: [{ role: "user", content: "Hi", timestamp: Date.now() }],
+			},
+			{
+				apiKey: "test",
+				onPayload: (params: unknown) => {
+					payload = params;
+				},
+			},
+		).result();
+
+		const params = (payload ?? mockState.lastParams) as { thinking?: { type?: string }; reasoning_effort?: string };
+		expect(params.thinking).toEqual({ type: "enabled", clear_thinking: false });
+		expect(params.thinking?.type).not.toBe("disabled");
+		expect(params.reasoning_effort).toBeUndefined();
+	});
 
 	it("maps z.ai GLM-5.2 thinking levels to reasoning_effort", async () => {
 		const model = getModel("zai", "glm-5.2")!;
@@ -1619,7 +1698,11 @@ describe("openai-completions tool_choice", () => {
 	});
 
 	it("sends max_tokens for Z.AI completions models", async () => {
-		const cases = [getModel("zai", "glm-5-turbo")!, getModel("zai", "glm-5.2")!] as const;
+		const cases = [
+			getModel("zai", "glm-5-turbo")!,
+			getModel("zai", "glm-5.2")!,
+			getModel("zai", "glm-5.3")!,
+		] as const;
 
 		for (const model of cases) {
 			expect(model.compat?.maxTokensField).toBe("max_tokens");

packages/coding-agent/changes.md

@@ -1,5 +1,9 @@
 # Local fork changes
 
+## 2026-08-29 - GLM-5.3 default and prompt preset
+
+- Use GLM-5.3 as the Z.AI global and China default, with the matching built-in prompt preset from current main.
+
 ## Credential rotation and fallback parity fixes (2026-08-28)
 
 - Preserve dotted bare model IDs in fallback tombstone matching, admit policy-only credential slots, avoid consuming half-open leases during runtime preflight, and isolate service-created credential pool state under the requested agent directory.

packages/coding-agent/src/core/model-resolver.ts

@@ -57,8 +57,8 @@ export const defaultModelPerProvider: Record<string, string> = {
 	xai: "grok-4.5",
 	groq: "openai/gpt-oss-120b",
 	cerebras: "gpt-oss-120b",
-	zai: "glm-5.2",
-	"zai-coding-cn": "glm-5.2",
+	zai: "glm-5.3",
+	"zai-coding-cn": "glm-5.3",
 	mistral: "devstral-medium-latest",
 	minimax: "MiniMax-M2.7",
 	"minimax-cn": "MiniMax-M2.7",

packages/coding-agent/src/modes/interactive/changes.md

@@ -118,7 +118,6 @@
 ### Expected merge conflict zones
 
 - LOW: `interactive-mode.ts` `compaction_end` case and `interactive-host-runtime.ts` wire event handling.
-||||||| 84a19a642
 ## Explain disk-capacity failures during uncaught interactive shutdown (2026-08-29)
 
 ### What changed

packages/coding-agent/test/model-resolver.test.ts

@@ -702,8 +702,8 @@ describe("default model selection", () => {
 	});
 
 	test("zai, minimax, cerebras, and ant-ling defaults track current models", () => {
-		expect(defaultModelPerProvider.zai).toBe("glm-5.2");
-		expect(defaultModelPerProvider["zai-coding-cn"]).toBe("glm-5.2");
+		expect(defaultModelPerProvider.zai).toBe("glm-5.3");
+		expect(defaultModelPerProvider["zai-coding-cn"]).toBe("glm-5.3");
 		expect(defaultModelPerProvider.minimax).toBe("MiniMax-M2.7");
 		expect(defaultModelPerProvider["minimax-cn"]).toBe("MiniMax-M2.7");
 		expect(defaultModelPerProvider.cerebras).toBe("gpt-oss-120b");
@@ -874,7 +874,7 @@ describe("default model selection", () => {
 
 		expect(result.provenance).toBe("provider-default");
 		expect(result.model?.provider).toBe("zai");
-		expect(result.model?.id).toBe("glm-5.2");
+		expect(result.model?.id).toBe("glm-5.3");
 	});
 
 	test("findInitialModel ignores an unauthenticated saved default", async () => {