feat: Add GitLab Duo Agentic Chat Provider Support (#7333)

Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>
Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

Author: vglafirov

bun.lock

@@ -70,6 +70,7 @@
     "@ai-sdk/vercel": "1.0.31",
     "@ai-sdk/xai": "2.0.51",
     "@clack/prompts": "1.0.0-alpha.1",
+    "@gitlab/gitlab-ai-provider": "3.1.0",
     "@hono/standard-validator": "0.1.5",
     "@hono/zod-validator": "catalog:",
     "@modelcontextprotocol/sdk": "1.25.2",

packages/opencode/package.json

@@ -14,7 +14,11 @@ import { NamedError } from "@opencode-ai/util/error"
 export namespace Plugin {
   const log = Log.create({ service: "plugin" })
 
-  const BUILTIN = ["opencode-copilot-auth@0.0.12", "opencode-anthropic-auth@0.0.8"]
+  const BUILTIN = [
+    "opencode-copilot-auth@0.0.12",
+    "opencode-anthropic-auth@0.0.8",
+    "@gitlab/opencode-gitlab-auth@1.3.0",
+  ]
 
   // Built-in plugins that are directly imported (not installed from npm)
   const INTERNAL_PLUGINS: PluginInstance[] = [CodexAuthPlugin]
@@ -46,6 +50,7 @@ export namespace Plugin {
     if (!Flag.OPENCODE_DISABLE_DEFAULT_PLUGINS) {
       plugins.push(...BUILTIN)
     }
+
     for (let plugin of plugins) {
       // ignore old codex plugin since it is supported first party now
       if (plugin.includes("opencode-openai-codex-auth")) continue

packages/opencode/src/plugin/index.ts

@@ -1,4 +1,6 @@
 import z from "zod"
+import path from "path"
+import os from "os"
 import fuzzysort from "fuzzysort"
 import { Config } from "../config/config"
 import { mapValues, mergeDeep, omit, pickBy, sortBy } from "remeda"
@@ -35,6 +37,7 @@ import { createGateway } from "@ai-sdk/gateway"
 import { createTogetherAI } from "@ai-sdk/togetherai"
 import { createPerplexity } from "@ai-sdk/perplexity"
 import { createVercel } from "@ai-sdk/vercel"
+import { createGitLab } from "@gitlab/gitlab-ai-provider"
 import { ProviderTransform } from "./transform"
 
 export namespace Provider {
@@ -60,6 +63,7 @@ export namespace Provider {
     "@ai-sdk/togetherai": createTogetherAI,
     "@ai-sdk/perplexity": createPerplexity,
     "@ai-sdk/vercel": createVercel,
+    "@gitlab/gitlab-ai-provider": createGitLab,
     // @ts-ignore (TODO: kill this code so we dont have to maintain it)
     "@ai-sdk/github-copilot": createGitHubCopilotOpenAICompatible,
   }
@@ -390,6 +394,43 @@ export namespace Provider {
         },
       }
     },
+    async gitlab(input) {
+      const instanceUrl = Env.get("GITLAB_INSTANCE_URL") || "https://gitlab.com"
+
+      const auth = await Auth.get(input.id)
+      const apiKey = await (async () => {
+        if (auth?.type === "oauth") return auth.access
+        if (auth?.type === "api") return auth.key
+        return Env.get("GITLAB_TOKEN")
+      })()
+
+      const config = await Config.get()
+      const providerConfig = config.provider?.["gitlab"]
+
+      return {
+        autoload: !!apiKey,
+        options: {
+          instanceUrl,
+          apiKey,
+          featureFlags: {
+            duo_agent_platform_agentic_chat: true,
+            duo_agent_platform: true,
+            ...(providerConfig?.options?.featureFlags || {}),
+          },
+        },
+        async getModel(sdk: ReturnType<typeof createGitLab>, modelID: string, options?: { anthropicModel?: string }) {
+          const anthropicModel = options?.anthropicModel
+          return sdk.agenticChat(modelID, {
+            anthropicModel,
+            featureFlags: {
+              duo_agent_platform_agentic_chat: true,
+              duo_agent_platform: true,
+              ...(providerConfig?.options?.featureFlags || {}),
+            },
+          })
+        },
+      }
+    },
     "cloudflare-ai-gateway": async (input) => {
       const accountId = Env.get("CLOUDFLARE_ACCOUNT_ID")
       const gateway = Env.get("CLOUDFLARE_GATEWAY_ID")

packages/opencode/src/provider/provider.ts

@@ -9,7 +9,11 @@ import path from "path"
 
 mock.module("../../src/bun/index", () => ({
   BunProc: {
-    install: async (pkg: string) => pkg,
+    install: async (pkg: string, _version?: string) => {
+      // Return package name without version for mocking
+      const lastAtIndex = pkg.lastIndexOf("@")
+      return lastAtIndex > 0 ? pkg.substring(0, lastAtIndex) : pkg
+    },
     run: async () => {
       throw new Error("BunProc.run should not be called in tests")
     },
@@ -28,6 +32,7 @@ mock.module("@aws-sdk/credential-providers", () => ({
 const mockPlugin = () => ({})
 mock.module("opencode-copilot-auth", () => ({ default: mockPlugin }))
 mock.module("opencode-anthropic-auth", () => ({ default: mockPlugin }))
+mock.module("@gitlab/opencode-gitlab-auth", () => ({ default: mockPlugin }))
 
 // Import after mocks are set up
 const { tmpdir } = await import("../fixture/fixture")