From aac17135835e9d4eb3b7278b09d40efd14d60cf6 Mon Sep 17 00:00:00 2001
From: Matan Kushner <hello@matchai.dev>
Date: Mon, 13 Apr 2026 11:23:11 +0900
Subject: [PATCH] test: add vercel provider transform tests

---
 src/cli/provider-model-id-transform.test.ts | 83 +++++++++++++++++++++
 1 file changed, 83 insertions(+)

diff --git a/src/cli/provider-model-id-transform.test.ts b/src/cli/provider-model-id-transform.test.ts
index ddfdd6e2f..be01735d0 100644
--- a/src/cli/provider-model-id-transform.test.ts
+++ b/src/cli/provider-model-id-transform.test.ts
@@ -201,6 +201,89 @@ describe("transformModelForProvider", () => {
 		})
 	})
 
+	describe("vercel provider", () => {
+		test("prepends anthropic/ and applies anthropic transform for claude models", () => {
+			// #given vercel provider and claude-opus-4-6 model
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "claude-opus-4-6")
+
+			// #then should produce anthropic/claude-opus-4.6
+			expect(result).toBe("anthropic/claude-opus-4.6")
+		})
+
+		test("prepends anthropic/ and applies anthropic transform for claude-sonnet", () => {
+			// #given vercel provider and claude-sonnet-4-6 model
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "claude-sonnet-4-6")
+
+			// #then should produce anthropic/claude-sonnet-4.6
+			expect(result).toBe("anthropic/claude-sonnet-4.6")
+		})
+
+		test("prepends anthropic/ and applies anthropic transform for claude-haiku", () => {
+			// #given vercel provider and claude-haiku-4-5 model
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "claude-haiku-4-5")
+
+			// #then should produce anthropic/claude-haiku-4.5
+			expect(result).toBe("anthropic/claude-haiku-4.5")
+		})
+
+		test("prepends openai/ for gpt models", () => {
+			// #given vercel provider and gpt-5.4 model
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "gpt-5.4")
+
+			// #then should produce openai/gpt-5.4
+			expect(result).toBe("openai/gpt-5.4")
+		})
+
+		test("prepends google/ and applies google transform for gemini models", () => {
+			// #given vercel provider and gemini-3.1-pro model
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "gemini-3.1-pro")
+
+			// #then should produce google/gemini-3.1-pro-preview
+			expect(result).toBe("google/gemini-3.1-pro-preview")
+		})
+
+		test("prepends google/ and applies google transform for gemini-3-flash", () => {
+			// #given vercel provider and gemini-3-flash model
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "gemini-3-flash")
+
+			// #then should produce google/gemini-3-flash-preview
+			expect(result).toBe("google/gemini-3-flash-preview")
+		})
+
+		test("prepends xai/ for grok models", () => {
+			// #given vercel provider and grok-code-fast-1 model
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "grok-code-fast-1")
+
+			// #then should produce xai/grok-code-fast-1
+			expect(result).toBe("xai/grok-code-fast-1")
+		})
+
+		test("delegates to sub-provider when model already has sub-provider prefix", () => {
+			// #given vercel provider and anthropic/claude-opus-4-6 (already prefixed)
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "anthropic/claude-opus-4-6")
+
+			// #then should apply anthropic transform within the prefix
+			expect(result).toBe("anthropic/claude-opus-4.6")
+		})
+
+		test("passes through unknown models without sub-provider prefix", () => {
+			// #given vercel provider and an unknown model name
+			// #when transformModelForProvider is called
+			const result = transformModelForProvider("vercel", "big-pickle")
+
+			// #then should pass through unchanged
+			expect(result).toBe("big-pickle")
+		})
+	})
+
 	describe("unknown provider", () => {
 		test("passes model through unchanged for unknown provider", () => {
 			// #given unknown provider and any model