fix(providers): required copilot vision confirmation

Keep non-personal Copilot endpoints text-only when discovery omits supports.vision, while preserving explicit vision support.

Fixes #4779

packages/catalog/src/provider-models/openai-compat.ts

@@ -16,7 +16,12 @@ import { getBundledModels } from "../models";
 import type { Api, FetchImpl, Model, ModelSpec, OpenAICompat, Provider, ThinkingConfig } from "../types";
 import { discoveryFetch, isAnthropicOAuthToken, isRecord, toBoolean, toNumber, toPositiveNumber } from "../utils";
 import { coreWeaveProjectHeaders } from "../wire/coreweave";
-import { COPILOT_API_HEADERS, getGitHubCopilotBaseUrl, parseGitHubCopilotApiKey } from "../wire/github-copilot";
+import {
+	COPILOT_API_HEADERS,
+	getGitHubCopilotBaseUrl,
+	isPersonalGitHubCopilotBaseUrl,
+	parseGitHubCopilotApiKey,
+} from "../wire/github-copilot";
 import { createBundledReferenceMap, createReferenceResolver, toModelSpec } from "./bundled-references";
 
 const MODELS_DEV_URL = "https://models.dev/api.json";
@@ -3692,11 +3697,11 @@ export function githubCopilotModelManagerOptions(config?: GithubCopilotModelMana
 						const api = inferCopilotApi(defaults.id);
 						const supportsVision = extractCopilotSupportsVision(entry);
 						const input: ModelSpec<Api>["input"] =
-							supportsVision === undefined
-								? (reference?.input ?? defaults.input)
-								: supportsVision
-									? ["text", "image"]
-									: ["text"];
+							supportsVision === true
+								? ["text", "image"]
+								: supportsVision === false || !isPersonalGitHubCopilotBaseUrl(baseUrl)
+									? ["text"]
+									: (reference?.input ?? defaults.input);
 						// With COPILOT_API_HEADERS the served window is the long-context
 						// ceiling; the default tier ends at token_prices.default.context_max
 						// prompt tokens. Cap the base entry to the default tier — the long

packages/catalog/test/github-copilot-model-limits.test.ts

@@ -605,6 +605,40 @@ describe("github copilot vision endpoint policy", () => {
 		}
 	});
 
+	it("maps omitted upstream vision to text-only on non-personal Copilot endpoints", async () => {
+		for (const endpoint of [
+			{
+				apiKey: businessApiKey,
+				baseUrl: "https://api.business.githubcopilot.com",
+				token: "ghu_business_token",
+			},
+			{
+				apiKey: enterpriseApiKey,
+				baseUrl: "https://copilot-api.ghe.example.com",
+				token: "ghu_enterprise_token",
+			},
+		]) {
+			const { models } = await discoverCopilotModels(
+				{
+					data: [
+						tieredCopilotEntry({
+							id: "claude-sonnet-4.6",
+							name: "Claude Sonnet 4.6",
+							window: 200_000,
+							maxOutput: 32_000,
+						}),
+					],
+				},
+				endpoint.apiKey,
+				endpoint.baseUrl,
+				endpoint.token,
+			);
+			const model = models.find(candidate => candidate.id === "claude-sonnet-4.6");
+			expect(model?.baseUrl).toBe(endpoint.baseUrl);
+			expect(model?.input).toEqual(["text"]);
+		}
+	});
+
 	it("keeps vision on the canonical personal Copilot endpoint", async () => {
 		const { models } = await discoverCopilotModels({
 			data: [