GitLab Duo provider

packages/ai/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Added
+
+- Added GitLab Duo provider support using `@gitlab/gitlab-ai-provider` for native tool calling via GitLab's Anthropic proxy. Supports Claude Opus 4.5, Sonnet 4.5, and Haiku 4.5 models with automatic OAuth token management.
+
 ### Fixed
 
 - Fixed OpenCode provider's `/v1` endpoint to use `system` role instead of `developer` role, fixing `400 Incorrect role information` error for models using `openai-completions` API ([#755](https://github.com/badlogic/pi-mono/pull/755) by [@melihmucuk](https://github.com/melihmucuk))

packages/ai/README.md

@@ -51,6 +51,7 @@ Unified LLM API with automatic model discovery, provider configuration, token an
 - **Anthropic**
 - **Google**
 - **Vertex AI** (Gemini via Vertex AI)
+- **GitLab Duo**
 - **Mistral**
 - **Groq**
 - **Cerebras**
@@ -478,6 +479,13 @@ await complete(googleModel, context, {
     budgetTokens: 8192  // -1 for dynamic, 0 to disable
   }
 });
+
+// GitLab Duo (uses Claude via GitLab's Anthropic proxy)
+const gitlabDuoModel = getModel('gitlab-duo', 'duo-chat');
+await complete(gitlabDuoModel, context, {
+  thinking: true,
+  instanceUrl: 'https://gitlab.example.com', // Optional: self-hosted GitLab URL
+});
 ```
 
 ### Streaming Thinking Content
@@ -858,6 +866,7 @@ In Node.js environments, you can set environment variables to avoid passing API
 | OpenAI | `OPENAI_API_KEY` |
 | Anthropic | `ANTHROPIC_API_KEY` or `ANTHROPIC_OAUTH_TOKEN` |
 | Google | `GEMINI_API_KEY` |
+| GitLab Duo | `GITLAB_DUO_TOKEN` or `GITLAB_TOKEN` |
 | Vertex AI | `GOOGLE_CLOUD_PROJECT` (or `GCLOUD_PROJECT`) + `GOOGLE_CLOUD_LOCATION` + ADC |
 | Mistral | `MISTRAL_API_KEY` |
 | Groq | `GROQ_API_KEY` |
@@ -898,6 +907,7 @@ Several providers require OAuth authentication instead of static API keys:
 - **Anthropic** (Claude Pro/Max subscription)
 - **OpenAI Codex** (ChatGPT Plus/Pro subscription, access to GPT-5.x Codex models)
 - **GitHub Copilot** (Copilot subscription)
+- **GitLab Duo** (GitLab subscription with Duo access)
 - **Google Gemini CLI** (Gemini 2.0/2.5 via Google Cloud Code Assist; free tier or paid subscription)
 - **Antigravity** (Free Gemini 3, Claude, GPT-OSS via Google Cloud)
 

packages/ai/package.json

@@ -24,6 +24,7 @@
 	"dependencies": {
 		"@anthropic-ai/sdk": "0.71.2",
 		"@aws-sdk/client-bedrock-runtime": "^3.966.0",
+		"@gitlab/gitlab-ai-provider": "^3.1.1",
 		"@google/genai": "1.34.0",
 		"@mistralai/mistralai": "1.10.0",
 		"@sinclair/typebox": "^0.34.41",

packages/ai/scripts/generate-models.ts

@@ -4,6 +4,7 @@ import { writeFileSync } from "fs";
 import { join, dirname } from "path";
 import { fileURLToPath } from "url";
 import { Api, KnownProvider, Model } from "../src/types.js";
+import { getGitLabDuoModels } from "../src/providers/gitlab-duo-models.js";
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
@@ -618,7 +619,10 @@ async function generateModels() {
 	const aiGatewayModels = await fetchAiGatewayModels();
 
 	// Combine models (models.dev has priority)
-	const allModels = [...modelsDevModels, ...openRouterModels, ...aiGatewayModels];
+	// Get GitLab Duo models
+	const gitLabDuoModels = getGitLabDuoModels();
+
+	const allModels = [...modelsDevModels, ...openRouterModels, ...aiGatewayModels, ...gitLabDuoModels];
 
 	// Fix incorrect cache pricing for Claude Opus 4.5 from models.dev
 	// models.dev has 3x the correct pricing (1.5/18.75 instead of 0.5/6.25)

packages/ai/src/cli.ts

@@ -4,6 +4,7 @@ import { existsSync, readFileSync, writeFileSync } from "fs";
 import { createInterface } from "readline";
 import { loginAnthropic } from "./utils/oauth/anthropic.js";
 import { loginGitHubCopilot } from "./utils/oauth/github-copilot.js";
+import { loginGitLabDuo } from "./utils/oauth/gitlab-duo.js";
 import { loginAntigravity } from "./utils/oauth/google-antigravity.js";
 import { loginGeminiCli } from "./utils/oauth/google-gemini-cli.js";
 import { getOAuthProviders } from "./utils/oauth/index.js";
@@ -64,6 +65,19 @@ async function login(provider: OAuthProvider): Promise<void> {
 				});
 				break;
 
+			case "gitlab-duo":
+				credentials = await loginGitLabDuo(
+					(info) => {
+						console.log(`\nOpen this URL in your browser:\n${info.url}`);
+						if (info.instructions) console.log(info.instructions);
+						console.log();
+					},
+					async (p) => {
+						return await promptFn(`${p.message}${p.placeholder ? ` (${p.placeholder})` : ""}:`);
+					},
+				);
+				break;
+
 			case "google-gemini-cli":
 				credentials = await loginGeminiCli(
 					(info) => {