feat(auth): add support for kiro OAuth model alias

- Introduced `kiro` channel and alias resolution in `oauth_model_alias` logic.
- Updated supported channels documentation and examples to include `kiro` and `github-copilot`.
- Enhanced unit tests to validate `kiro` alias functionality.

config.example.yaml

@@ -218,7 +218,7 @@ nonstream-keepalive-interval: 0
 
 # Global OAuth model name aliases (per channel)
 # These aliases rename model IDs for both model listing and request routing.
-# Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow.
+# Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow, kiro, github-copilot.
 # NOTE: Aliases do not apply to gemini-api-key, codex-api-key, claude-api-key, openai-compatibility, vertex-api-key, or ampcode.
 # You can repeat the same name with different aliases to expose multiple client model names.
 #oauth-model-alias:

internal/config/config.go

@@ -103,7 +103,7 @@ type Config struct {
 
 	// OAuthModelAlias defines global model name aliases for OAuth/file-backed auth channels.
 	// These aliases affect both model listing and model routing for supported channels:
-	// gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow.
+	// gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow, kiro, github-copilot.
 	//
 	// NOTE: This does not apply to existing per-credential model alias features under:
 	// gemini-api-key, codex-api-key, claude-api-key, openai-compatibility, vertex-api-key, and ampcode.

sdk/cliproxy/auth/oauth_model_alias.go

@@ -221,7 +221,7 @@ func modelAliasChannel(auth *Auth) string {
 // and auth kind. Returns empty string if the provider/authKind combination doesn't support
 // OAuth model alias (e.g., API key authentication).
 //
-// Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow.
+// Supported channels: gemini-cli, vertex, aistudio, antigravity, claude, codex, qwen, iflow, kiro, github-copilot.
 func OAuthModelAliasChannel(provider, authKind string) string {
 	provider = strings.ToLower(strings.TrimSpace(provider))
 	authKind = strings.ToLower(strings.TrimSpace(authKind))
@@ -245,7 +245,7 @@ func OAuthModelAliasChannel(provider, authKind string) string {
 			return ""
 		}
 		return "codex"
-	case "gemini-cli", "aistudio", "antigravity", "qwen", "iflow":
+	case "gemini-cli", "aistudio", "antigravity", "qwen", "iflow", "kiro", "github-copilot":
 		return provider
 	default:
 		return ""

sdk/cliproxy/auth/oauth_model_alias_test.go

@@ -43,6 +43,15 @@ func TestResolveOAuthUpstreamModel_SuffixPreservation(t *testing.T) {
 			input:   "gemini-2.5-pro",
 			want:    "gemini-2.5-pro-exp-03-25",
 		},
+		{
+			name: "kiro alias resolves",
+			aliases: map[string][]internalconfig.OAuthModelAlias{
+				"kiro": {{Name: "kiro-claude-sonnet-4-5", Alias: "sonnet"}},
+			},
+			channel: "kiro",
+			input:   "sonnet",
+			want:    "kiro-claude-sonnet-4-5",
+		},
 		{
 			name: "config suffix takes priority",
 			aliases: map[string][]internalconfig.OAuthModelAlias{
@@ -152,6 +161,8 @@ func createAuthForChannel(channel string) *Auth {
 		return &Auth{Provider: "qwen"}
 	case "iflow":
 		return &Auth{Provider: "iflow"}
+	case "kiro":
+		return &Auth{Provider: "kiro"}
 	default:
 		return &Auth{Provider: channel}
 	}