diff --git a/packages/core/src/__tests__/config-validation.test.ts b/packages/core/src/__tests__/config-validation.test.ts
index a76ea7516..97310b972 100644
--- a/packages/core/src/__tests__/config-validation.test.ts
+++ b/packages/core/src/__tests__/config-validation.test.ts
@@ -418,4 +418,44 @@ describe("Config Defaults", () => {
     const validated = validateConfig(config);
     expect(validated.projects.proj1.tracker).toEqual({ plugin: "github" });
   });
+
+  it("infers GitLab tracker default from scm plugin", () => {
+    const config = {
+      projects: {
+        proj1: {
+          path: "/repos/test",
+          repo: "org/test",
+          defaultBranch: "main",
+          scm: {
+            plugin: "gitlab",
+            host: "gitlab.company.com",
+          },
+        },
+      },
+    };
+
+    const validated = validateConfig(config);
+    expect(validated.projects.proj1.scm).toEqual({ plugin: "gitlab", host: "gitlab.company.com" });
+    expect(validated.projects.proj1.tracker).toEqual({ plugin: "gitlab" });
+  });
+
+  it("infers GitLab scm default from tracker plugin", () => {
+    const config = {
+      projects: {
+        proj1: {
+          path: "/repos/test",
+          repo: "org/test",
+          defaultBranch: "main",
+          tracker: {
+            plugin: "gitlab",
+            host: "gitlab.com",
+          },
+        },
+      },
+    };
+
+    const validated = validateConfig(config);
+    expect(validated.projects.proj1.tracker).toEqual({ plugin: "gitlab", host: "gitlab.com" });
+    expect(validated.projects.proj1.scm).toEqual({ plugin: "gitlab" });
+  });
 });
diff --git a/packages/core/src/__tests__/plugin-registry.test.ts b/packages/core/src/__tests__/plugin-registry.test.ts
index 4d6e0b861..c8abc67ca 100644
--- a/packages/core/src/__tests__/plugin-registry.test.ts
+++ b/packages/core/src/__tests__/plugin-registry.test.ts
@@ -165,6 +165,26 @@ describe("loadBuiltins", () => {
     expect(registry.get("agent", "opencode")).not.toBeNull();
   });
 
+  it("registers gitlab tracker and scm plugins from importFn", async () => {
+    const registry = createPluginRegistry();
+
+    const fakeTracker = makePlugin("tracker", "gitlab");
+    const fakeScm = makePlugin("scm", "gitlab");
+
+    await registry.loadBuiltins(undefined, async (pkg: string) => {
+      if (pkg === "@composio/ao-plugin-tracker-gitlab") return fakeTracker;
+      if (pkg === "@composio/ao-plugin-scm-gitlab") return fakeScm;
+      throw new Error(`Not found: ${pkg}`);
+    });
+
+    expect(registry.list("tracker")).toContainEqual(
+      expect.objectContaining({ name: "gitlab", slot: "tracker" }),
+    );
+    expect(registry.list("scm")).toContainEqual(
+      expect.objectContaining({ name: "gitlab", slot: "scm" }),
+    );
+  });
+
   it("passes configured notifier plugin config to create()", async () => {
     const registry = createPluginRegistry();
     const fakeWebhookNotifier = makePlugin("notifier", "webhook");
diff --git a/packages/core/src/config.ts b/packages/core/src/config.ts
index 11ca6fb23..743d66fe2 100644
--- a/packages/core/src/config.ts
+++ b/packages/core/src/config.ts
@@ -18,6 +18,34 @@ import { z } from "zod";
 import type { OrchestratorConfig } from "./types.js";
 import { generateSessionPrefix } from "./paths.js";
 
+function inferScmPlugin(project: {
+  repo: string;
+  scm?: Record<string, unknown>;
+  tracker?: Record<string, unknown>;
+}): "github" | "gitlab" {
+  const scmPlugin = project.scm?.["plugin"];
+  if (scmPlugin === "gitlab") {
+    return "gitlab";
+  }
+
+  const scmHost = project.scm?.["host"];
+  if (typeof scmHost === "string" && scmHost.toLowerCase().includes("gitlab")) {
+    return "gitlab";
+  }
+
+  const trackerPlugin = project.tracker?.["plugin"];
+  if (trackerPlugin === "gitlab") {
+    return "gitlab";
+  }
+
+  const trackerHost = project.tracker?.["host"];
+  if (typeof trackerHost === "string" && trackerHost.toLowerCase().includes("gitlab")) {
+    return "gitlab";
+  }
+
+  return "github";
+}
+
 // =============================================================================
 // ZOD SCHEMAS
 // =============================================================================
@@ -166,14 +194,16 @@ function applyProjectDefaults(config: OrchestratorConfig): OrchestratorConfig {
       project.sessionPrefix = generateSessionPrefix(projectId);
     }
 
+    const inferredPlugin = inferScmPlugin(project);
+
     // Infer SCM from repo if not set
     if (!project.scm && project.repo.includes("/")) {
-      project.scm = { plugin: "github" };
+      project.scm = { plugin: inferredPlugin };
     }
 
     // Infer tracker from repo if not set (default to github issues)
     if (!project.tracker) {
-      project.tracker = { plugin: "github" };
+      project.tracker = { plugin: inferredPlugin };
     }
   }
 
diff --git a/packages/core/src/plugin-registry.ts b/packages/core/src/plugin-registry.ts
index 9892786f7..46b80f6df 100644
--- a/packages/core/src/plugin-registry.ts
+++ b/packages/core/src/plugin-registry.ts
@@ -38,8 +38,10 @@ const BUILTIN_PLUGINS: Array<{ slot: PluginSlot; name: string; pkg: string }> =
   // Trackers
   { slot: "tracker", name: "github", pkg: "@composio/ao-plugin-tracker-github" },
   { slot: "tracker", name: "linear", pkg: "@composio/ao-plugin-tracker-linear" },
+  { slot: "tracker", name: "gitlab", pkg: "@composio/ao-plugin-tracker-gitlab" },
   // SCM
   { slot: "scm", name: "github", pkg: "@composio/ao-plugin-scm-github" },
+  { slot: "scm", name: "gitlab", pkg: "@composio/ao-plugin-scm-gitlab" },
   // Notifiers
   { slot: "notifier", name: "composio", pkg: "@composio/ao-plugin-notifier-composio" },
   { slot: "notifier", name: "desktop", pkg: "@composio/ao-plugin-notifier-desktop" },
@@ -64,9 +66,7 @@ function extractPluginConfig(
       if (!notifierConfig || typeof notifierConfig !== "object") continue;
       const configuredPlugin = (notifierConfig as Record<string, unknown>)["plugin"];
       const hasExplicitPlugin = typeof configuredPlugin === "string" && configuredPlugin.length > 0;
-      const matches = hasExplicitPlugin
-        ? configuredPlugin === name
-        : notifierName === name;
+      const matches = hasExplicitPlugin ? configuredPlugin === name : notifierName === name;
       if (matches) {
         const { plugin: _plugin, ...rest } = notifierConfig as Record<string, unknown>;
         return rest;