diff --git a/infra/config/generated/cr-buildbucket.cfg b/infra/config/generated/cr-buildbucket.cfg
index 9042dd93..6a0c463a 100644
--- a/infra/config/generated/cr-buildbucket.cfg
+++ b/infra/config/generated/cr-buildbucket.cfg
@@ -38,6 +38,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_fuchsia_arm64_rel"
@@ -59,6 +63,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_fuchsia_x64_dbg"
@@ -79,6 +87,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_fuchsia_x64_rel"
@@ -99,6 +111,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_arm64_dbg"
@@ -123,6 +139,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_arm64_rel"
@@ -147,6 +167,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_x64_dbg"
@@ -170,6 +194,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_x64_rel"
@@ -193,6 +221,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_linux_x64_dbg"
@@ -213,6 +245,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_linux_x64_rel"
@@ -233,6 +269,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_mac_x64_dbg"
@@ -256,6 +296,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_mac_x64_rel"
@@ -279,6 +323,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_win_x64_dbg"
@@ -299,6 +347,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_win_x64_rel"
@@ -319,6 +371,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
   }
 }
@@ -363,6 +419,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_fuchsia_arm64_rel"
@@ -383,6 +443,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_fuchsia_x64_dbg"
@@ -402,6 +466,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_fuchsia_x64_rel"
@@ -421,6 +489,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_arm64_dbg"
@@ -444,6 +516,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_arm64_rel"
@@ -467,6 +543,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_x64_dbg"
@@ -489,6 +569,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_ios_x64_rel"
@@ -511,6 +595,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_linux_x64_dbg"
@@ -530,6 +618,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_linux_x64_rel"
@@ -549,6 +641,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_mac_x64_dbg"
@@ -571,6 +667,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_mac_x64_rel"
@@ -593,6 +693,10 @@ buckets {
       }
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_win_x64_dbg"
@@ -612,6 +716,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
     builders {
       name: "crashpad_win_x64_rel"
@@ -631,6 +739,10 @@ buckets {
       execution_timeout_secs: 10800
       build_numbers: YES
       service_account: "crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+      experiments {
+        key: "luci.use_realms"
+        value: 100
+      }
     }
   }
 }
diff --git a/infra/config/generated/realms.cfg b/infra/config/generated/realms.cfg
new file mode 100644
index 00000000..41377301
--- /dev/null
+++ b/infra/config/generated/realms.cfg
@@ -0,0 +1,57 @@
+# Auto-generated by lucicfg.
+# Do not modify manually.
+#
+# For the schema of this file, see RealmsCfg message:
+#   https://luci-config.appspot.com/schemas/projects:realms.cfg
+
+realms {
+  name: "@root"
+  bindings {
+    role: "role/buildbucket.reader"
+    principals: "group:all"
+  }
+  bindings {
+    role: "role/configs.reader"
+    principals: "group:all"
+  }
+  bindings {
+    role: "role/logdog.reader"
+    principals: "group:all"
+  }
+  bindings {
+    role: "role/scheduler.reader"
+    principals: "group:all"
+  }
+}
+realms {
+  name: "ci"
+  bindings {
+    role: "role/buildbucket.builderServiceAccount"
+    principals: "user:crashpad-ci-builder@chops-service-accounts.iam.gserviceaccount.com"
+  }
+  bindings {
+    role: "role/buildbucket.owner"
+    principals: "group:project-crashpad-admins"
+  }
+  bindings {
+    role: "role/buildbucket.triggerer"
+    principals: "user:luci-scheduler@appspot.gserviceaccount.com"
+  }
+}
+realms {
+  name: "try"
+  bindings {
+    role: "role/buildbucket.builderServiceAccount"
+    principals: "user:crashpad-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+  }
+  bindings {
+    role: "role/buildbucket.owner"
+    principals: "group:project-crashpad-admins"
+    principals: "group:service-account-crashpad-cq"
+  }
+  bindings {
+    role: "role/buildbucket.triggerer"
+    principals: "group:project-crashpad-tryjob-access"
+    principals: "group:service-account-cq"
+  }
+}
diff --git a/infra/config/main.star b/infra/config/main.star
old mode 100644
new mode 100755
index 280de797..fb8af223
--- a/infra/config/main.star
+++ b/infra/config/main.star
@@ -13,6 +13,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+lucicfg.check_version("1.28.0", "Please update depot_tools")
+
+# Enable LUCI Realms support.
+lucicfg.enable_experiment("crbug.com/1085650")
+
+# Launch 100% of Swarming tasks for builds in "realms-aware mode".
+luci.builder.defaults.experiments.set({"luci.use_realms": 100})
+
+
 luci.project(
     name = "crashpad",
     buildbucket = "cr-buildbucket.appspot.com",