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Fix GitHub Copilot gpt-5.4 endpoint routing

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Amp-Thread-ID: https://ampcode.com/threads/T-019d14cd-bc90-70ce-b1ae-87bc97332650
Co-authored-by: Amp <amp@ampcode.com>
This commit is contained in:
hechieh
2026-03-22 19:05:44 +08:00
parent 7c2ad4cda2
commit 35907416b8
3 changed files with 43 additions and 0 deletions
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13
internal/registry/model_definitions.go
View File

@@ -365,6 +365,19 @@ func GetGitHubCopilotModels() []*ModelInfo {
SupportedEndpoints: []string{"/responses"},
Thinking: &ThinkingSupport{Levels: []string{"none", "low", "medium", "high", "xhigh"}},
},
{
ID: "gpt-5.4",
Object: "model",
Created: now,
OwnedBy: "github-copilot",
Type: "github-copilot",
DisplayName: "GPT-5.4",
Description: "OpenAI GPT-5.4 via GitHub Copilot",
ContextLength: 200000,
MaxCompletionTokens: 32768,
SupportedEndpoints: []string{"/responses"},
Thinking: &ThinkingSupport{Levels: []string{"low", "medium", "high", "xhigh"}},
},
{
ID: "claude-haiku-4.5",
Object: "model",

23
internal/runtime/executor/github_copilot_executor.go
View File

@@ -577,9 +577,32 @@ func useGitHubCopilotResponsesEndpoint(sourceFormat sdktranslator.Format, model
return true
}
baseModel := strings.ToLower(thinking.ParseSuffix(model).ModelName)
if info := registry.GetGlobalRegistry().GetModelInfo(baseModel, ""); info != nil {
if len(info.SupportedEndpoints) > 0 && !containsEndpoint(info.SupportedEndpoints, githubCopilotChatPath) && containsEndpoint(info.SupportedEndpoints, githubCopilotResponsesPath) {
return true
}
}
for _, info := range registry.GetGitHubCopilotModels() {
if info == nil || !strings.EqualFold(info.ID, baseModel) {
continue
}
if len(info.SupportedEndpoints) > 0 && !containsEndpoint(info.SupportedEndpoints, githubCopilotChatPath) && containsEndpoint(info.SupportedEndpoints, githubCopilotResponsesPath) {
return true
}
break
}
return strings.Contains(baseModel, "codex")
}
func containsEndpoint(endpoints []string, endpoint string) bool {
for _, item := range endpoints {
if item == endpoint {
return true
}
}
return false
}
// flattenAssistantContent converts assistant message content from array format
// to a joined string. GitHub Copilot requires assistant content as a string;
// sending it as an array causes Claude models to re-answer all previous prompts.

7
internal/runtime/executor/github_copilot_executor_test.go
View File

@@ -70,6 +70,13 @@ func TestUseGitHubCopilotResponsesEndpoint_CodexModel(t *testing.T) {
}
}
func TestUseGitHubCopilotResponsesEndpoint_RegistryResponsesOnlyModel(t *testing.T) {
t.Parallel()
if !useGitHubCopilotResponsesEndpoint(sdktranslator.FromString("openai"), "gpt-5.4") {
t.Fatal("expected responses-only registry model to use /responses")
}
}
func TestUseGitHubCopilotResponsesEndpoint_DefaultChat(t *testing.T) {
t.Parallel()
if useGitHubCopilotResponsesEndpoint(sdktranslator.FromString("openai"), "claude-3-5-sonnet") {