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fix(provider): skip Gemini schema sanitization for Copilot models #15313

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yangheng95 wants to merge 2 commits into from
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fix(provider): skip Gemini schema sanitization for Copilot models #15313

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824121e
fix(provider): skip Gemini schema sanitization for Copilot models
yangheng95 Feb 27, 2026
402a3ed
test: add schema tests for copilot gemini models
yangheng95 Feb 27, 2026
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9 changes: 7 additions & 2 deletions packages/opencode/src/provider/transform.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -895,8 +895,13 @@ export namespace ProviderTransform {
}
*/

// Convert integer enums to string enums for Google/Gemini
if (model.providerID === "google" || model.api.id.includes("gemini")) {
// Convert integer enums to string enums for Google/Gemini.
// Skip for Copilot models — they use OpenAI-compatible format and the
// Copilot API handles Gemini schema requirements internally.
if (
(model.providerID === "google" || model.api.id.includes("gemini")) &&
!model.providerID.includes("github-copilot")
) {
Comment on lines +898 to +904

Copilot AI Feb 27, 2026

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New behavior (skipping sanitizeGemini for github-copilot* providers) isn’t covered by unit tests. Please add a ProviderTransform.schema test case where providerID is "github-copilot" (or "github-copilot-enterprise") and api.id includes "gemini", asserting that Gemini-specific sanitization (e.g., enum-to-string conversion or stripping properties/required) does NOT occur.

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const sanitizeGemini = (obj: any): any => {
if (obj === null || typeof obj !== "object") {
return obj
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