diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index 2b3243a..065535c 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -97,6 +97,7 @@ version = "0.1.0"
 dependencies = [
  "async-trait",
  "clap",
+ "jmespath",
  "log",
  "regex",
  "serde",
@@ -167,6 +168,12 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "deunicode"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "850878694b7933ca4c9569d30a34b55031b9b139ee1fc7b94a527c4ef960d690"
+
 [[package]]
 name = "digest"
 version = "0.9.0"
@@ -433,6 +440,24 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "112c678d4050afce233f4f2852bb2eb519230b3cf12f33585275537d7e41578d"
 
+[[package]]
+name = "jmespath"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "017f8f53dd3b8ada762acb1f850da2a742d0ef3f921c60849a644380de1d683a"
+dependencies = [
+ "lazy_static",
+ "serde",
+ "serde_json",
+ "slug",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.126"
@@ -805,6 +830,15 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "slug"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3bc762e6a4b6c6fcaade73e77f9ebc6991b676f88bb2358bddb56560f073373"
+dependencies = [
+ "deunicode",
+]
+
 [[package]]
 name = "socket2"
 version = "0.4.4"
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index b8fd237..88c53e2 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -14,17 +14,18 @@ clap = { version = "3.2", features = ["derive", "std"], default-features = false
 
 # async
 tokio = { version = "*", features = ["time"] }
-async-trait = "0.1.57"
+async-trait = { version = "0.1.57" }
 
 # json
 serde = { version = "1.0", features = ["derive"] }
-serde_json = "1.0"
+serde_json = { version = "1.0" }
+jmespath = { version = "0.3", features = [ "sync" ] }
 
 regex = { version = "1" }
 
 # logging
-log = "0.4"
-simplelog = "0.12"
+log = { version = "0.4", features = ["max_level_debug", "release_max_level_warn"] }
+simplelog = { version = "0.12" }
 
 [profile.release]
 debug = false
diff --git a/backend/src/api/mod.rs b/backend/src/api/mod.rs
index 7ccae0e..37805bc 100644
--- a/backend/src/api/mod.rs
+++ b/backend/src/api/mod.rs
@@ -6,6 +6,7 @@ mod on_javascript_result;
 mod on_update;
 mod reload;
 mod run_js;
+mod steam_types;
 mod types;
 
 pub use about::get_about;
@@ -15,6 +16,7 @@ pub use on_javascript_result::on_javascript_result;
 pub use on_update::on_update;
 pub use reload::reload;
 pub use run_js::{GetJavascriptEndpoint, JavascriptData};
+pub use steam_types::*;
 pub(super) use types::*;
 
 pub(super) type ApiParameterType = Vec<usdpl_back::core::serdes::Primitive>;
diff --git a/backend/src/api/steam_types.rs b/backend/src/api/steam_types.rs
new file mode 100644
index 0000000..c76e6e3
--- /dev/null
+++ b/backend/src/api/steam_types.rs
@@ -0,0 +1,198 @@
+#![allow(non_snake_case)]
+use serde::{Serialize, Deserialize};
+
+// list of these is second callback param for SteamClient.Downloads.RegisterForDownloadItems
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamDownloadInfo {
+    pub active: bool,
+    pub appid: usize,
+    pub buildid: usize,
+    pub target_buildid: usize,
+    pub paused: bool,
+}
+
+// only callback param for SteamClient.Downloads.RegisterForDownloadOverview
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamDownloadOverview {
+    pub paused: bool,
+    pub throttling_suspended: bool,
+    pub update_appid: usize,
+    pub update_bytes_downloaded: usize,
+    pub update_bytes_processed: usize,
+    pub update_bytes_staged: usize,
+    pub update_bytes_to_download: usize,
+    pub update_bytes_to_process: usize,
+    pub update_bytes_to_stage: usize,
+    pub update_disc_bytes_per_second: usize,
+    pub update_is_install: bool,
+    pub update_is_prefetch_estimate: bool,
+    pub update_is_shader: bool,
+    pub update_is_workshop: bool,
+    pub update_network_bytes_per_second: usize,
+    pub update_peak_network_bytes_per_second: usize,
+    pub update_seconds_remaining: isize, // -1 seems to indicate not-applicable
+    pub update_start_time: usize,
+    pub update_state: String,
+}
+
+// only param of callback for SteamClient.GameSessions.RegisterForAchievementNotification
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamAchievementNotification {
+    pub achievement: SteamAchievement,
+    pub nCurrentProgress: usize,
+    pub nMaxProgress: usize,
+    pub unAppID: usize,
+}
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamAchievement {
+    pub bAchieved: bool,
+    pub bHidden: bool,
+    pub flAchieved: f64,
+    pub flCurrentProgress: f64,
+    pub flMaxProgress: f64,
+    pub flMinProgress: f64,
+    pub rtUnlocked: usize, // time since unix epoch
+    pub strDescription: String,
+    pub strID: String,
+    pub strImage: String,
+    pub strName: String,
+}
+
+// only param of callback for SteamClient.System.Bluetooth.RegisterForStateChanges
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamBluetoothState {
+    pub bEnabled: bool,
+    pub vecAdapters: Vec<SteamBluetoothAdapter>,
+    pub vecDevices: Vec<SteamBluetoothDevice>,
+}
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamBluetoothDevice {
+    pub bConnected: bool,
+    pub bPaired: bool,
+    pub eType: usize, // enum, idk the options
+    pub nAdapterId: usize, // corresponds to SteamBluetoothAdapter.nId
+    pub nStrengthRaw: usize, // units???
+    pub sMAC: String,
+    pub sName: String,
+}
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamBluetoothAdapter {
+    pub bDiscovering: bool,
+    pub bEnabled: bool,
+    pub nId: usize,
+    pub sMAC: String,
+    pub sName: String,
+}
+
+// only param of callback for SteamClient.System.Network.RegisterForConnectivityTestChanges
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamConnectivityTestChange {
+    pub bChecking: bool,
+    pub eConnectivityTestResult: usize, // enum, idk the options
+    pub eFakeState: usize, // enum, idk the options
+}
+
+// only param of callback for SteamClient.System.Network.RegisterForNetworkDiagnostics
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamNetworkDiagnostic {
+    pub status: bool,
+    pub total_bytes: usize,
+}
+
+// only param of callback for SteamClient.System.Audio.RegisterForDeviceAdded
+// and SteamClient.System.Audio.RegisterForDeviceAdded
+// Also type of vecDevices of await SteamClient.System.Audio.GetDevices()
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamAudioDevice {
+    pub bHasInput: bool,
+    pub bHasOutput: bool,
+    pub bIsDefaultInputDevice: bool,
+    pub bIsDefaultOutputDevice: bool,
+    pub flInputVolume: f64,
+    pub flOutputVolume: f64,
+    pub id: usize,
+    pub sName: String,
+}
+
+// only param of callback for SteamClient.System.Display.RegisterForBrightnessChanges
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamBrightness {
+    pub flBrightness: f64,
+}
+
+// not a callback; await SteamClient.System.GetSystemInfo()
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamSystemInfo {
+    pub nCPUHz: usize,
+    pub nCPULogicalCores: usize,
+    pub nCPUPhysicalCores: usize,
+    pub nSteamVersion: usize,
+    pub nSystemRAMSizeMB: usize,
+    pub nVideoRAMSizeMB: usize,
+    pub sBIOSVersion: String,
+    pub sCPUName: String,
+    pub sCPUVendor: String,
+    pub sHostname: String,
+    pub sKernelVersion: String,
+    pub sOSBuildId: String,
+    pub sOSCodename: String,
+    pub sOSName: String,
+    pub sOSVariantId: String,
+    pub sOSVersionId: String,
+    pub sSteamAPI: String,
+    pub sSteamBuildDate: String,
+    pub sVideoCardName: String,
+    pub sVideoDriverVersion: String,
+}
+
+// only param of callback for SteamClient.System.RegisterForAirplaneModeChanges
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamAirplane {
+    pub bEnabled: bool,
+}
+
+// only param of callback for SteamClient.System.RegisterForBatteryStateChanges
+// periodic
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamBattery {
+    pub bHasBattery: bool,
+    pub bShutdownRequested: bool,
+    pub eACState: usize,
+    pub eBatteryState: usize,
+    pub flLevel: f64,
+    pub nSecondsRemaining: usize,
+}
+
+// only param of callback for SteamClient.GameSessions.RegisterForScreenshotNotification
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamScreenshotNotification {
+    pub details: SteamScreenshot,
+    pub hScreenshot: usize,
+    pub strOperation: String,
+    pub unAppID: usize,
+}
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamScreenshot {
+    pub bSpoilers: bool,
+    pub bUploaded: bool,
+    pub ePrivacy: usize, // enum
+    pub hHandle: usize,
+    pub nAppID: usize,
+    pub nCreated: usize,
+    pub nHeight: usize,
+    pub nWidth: usize,
+    pub strCaption: String,
+    pub strUrl: String,
+}
+
+// list of these is only param of callback for SteamClient.Input.RegisterForControllerInputMessages
+#[derive(Serialize, Deserialize, Clone)]
+pub struct SteamControllerInputMessage {
+    pub bState: bool,
+    pub nController: usize,
+    pub strActionName: String,
+}
diff --git a/backend/src/api/types.rs b/backend/src/api/types.rs
index 35841ef..704a3b5 100644
--- a/backend/src/api/types.rs
+++ b/backend/src/api/types.rs
@@ -109,3 +109,26 @@ impl ApiJavascriptResult {
         Self::Error(ApiError::new(msg, err))
     }
 }
+
+#[derive(Serialize, Deserialize, Clone)]
+#[serde(tag = "event")]
+pub enum ApiRegisteredEvent {
+    #[serde(rename = "resume-from-suspend")]
+    ResumeFromSuspend,
+    #[serde(rename = "suspend-from-awake")]
+    SuspendRequest,
+    #[serde(rename = "download-items")]
+    DownloadList(ApiDownloadList),
+    #[serde(rename = "download-overview")]
+    DownloadOverview(super::SteamDownloadOverview),
+    #[serde(rename = "achievement-notification")]
+    AchievementNotification(super::SteamAchievementNotification),
+    #[serde(rename = "error")]
+    Error(ApiError),
+}
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct ApiDownloadList {
+    pub is_paused: bool,
+    pub list: Vec<super::SteamDownloadInfo>,
+}
diff --git a/backend/src/config/action.rs b/backend/src/config/action.rs
index afd7edb..013032f 100644
--- a/backend/src/config/action.rs
+++ b/backend/src/config/action.rs
@@ -13,6 +13,8 @@ pub enum TopLevelActionConfig {
     Mirror(MirrorAction),
     #[serde(rename = "javascript")]
     Javascript(JavascriptAction),
+    #[serde(rename = "json")]
+    Json(JsonAction),
 }
 
 #[derive(Serialize, Deserialize, Clone)]
@@ -24,6 +26,8 @@ pub enum ActionConfig {
     Transform(super::TransformAction),
     #[serde(rename = "javascript")]
     Javascript(JavascriptAction),
+    #[serde(rename = "json")]
+    Json(JsonAction),
 }
 
 #[derive(Serialize, Deserialize, Clone)]
@@ -43,3 +47,8 @@ pub struct MirrorAction;
 pub struct JavascriptAction {
     pub run: String,
 }
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct JsonAction {
+    pub jmespath: String,
+}
diff --git a/backend/src/config/mod.rs b/backend/src/config/mod.rs
index 82eddb5..d36cc79 100644
--- a/backend/src/config/mod.rs
+++ b/backend/src/config/mod.rs
@@ -10,7 +10,7 @@ mod toggle;
 mod transformer;
 
 pub use about::AboutConfig;
-pub use action::{TopLevelActionConfig, ActionConfig, CommandAction, MirrorAction, SequenceAction, JavascriptAction};
+pub use action::{TopLevelActionConfig, ActionConfig, CommandAction, MirrorAction, SequenceAction, JavascriptAction, JsonAction};
 pub use base::BaseConfig;
 pub use button::ButtonConfig;
 pub use element::ElementConfig;
diff --git a/backend/src/main.rs b/backend/src/main.rs
index 3fd998f..56f3ccb 100644
--- a/backend/src/main.rs
+++ b/backend/src/main.rs
@@ -13,8 +13,7 @@ fn main() -> Result<(), ()> {
     let cli_args = cli::CliArgs::cli();
     let log_filepath = cli_args.log.unwrap_or_else(|| format!("/tmp/{}.log", consts::PACKAGE_NAME).into());
     WriteLogger::init(
-        #[cfg(debug_assertions)]{LevelFilter::Debug},
-        #[cfg(not(debug_assertions))]{LevelFilter::Info},
+        LevelFilter::Off,
         Default::default(),
         std::fs::File::create(&log_filepath).expect(&format!("Failed create log file {}", log_filepath.display()))
     ).unwrap();
diff --git a/backend/src/runtime/actors/actor.rs b/backend/src/runtime/actors/actor.rs
index c4f3bea..cc194a0 100644
--- a/backend/src/runtime/actors/actor.rs
+++ b/backend/src/runtime/actors/actor.rs
@@ -52,6 +52,7 @@ pub enum TopLevelActorType {
     Mirror,
     Sequence(super::SequenceActor),
     Javascript(super::JavascriptActor),
+    Json(super::JsonActor),
 }
 
 impl<'a> SeqAct<'a> for TopLevelActorType {
@@ -69,7 +70,9 @@ impl<'a> SeqAct<'a> for TopLevelActorType {
             TopLevelActionConfig::Mirror(_) =>
                 Self::Mirror,
             TopLevelActionConfig::Javascript(j) =>
-                Self::Javascript(super::JavascriptActor::build(j, parameter)?)
+                Self::Javascript(super::JavascriptActor::build(j, parameter)?),
+            TopLevelActionConfig::Json(j) =>
+                Self::Json(super::JsonActor::build(j, ())?),
         })
     }
 
@@ -80,6 +83,7 @@ impl<'a> SeqAct<'a> for TopLevelActorType {
             Self::Mirror => p,
             Self::Sequence(s) => s.run(p),
             Self::Javascript(j) => j.run(p),
+            Self::Json(j) => j.run(p),
         }
     }
 }
@@ -88,6 +92,7 @@ pub enum ActorType {
     Command(super::CommandActor),
     Transform(super::TransformActor),
     Javascript(super::JavascriptActor),
+    Json(super::JsonActor),
 }
 
 impl<'a> SeqAct<'a> for ActorType {
@@ -101,7 +106,9 @@ impl<'a> SeqAct<'a> for ActorType {
             ActionConfig::Transform(t) =>
                 Self::Transform(super::TransformActor::build(t, ())?),
             ActionConfig::Javascript(j) =>
-                Self::Javascript(super::JavascriptActor::build(j, parameter)?)
+                Self::Javascript(super::JavascriptActor::build(j, parameter)?),
+            ActionConfig::Json(j) =>
+                Self::Json(super::JsonActor::build(j, ())?),
         })
     }
 
@@ -110,6 +117,7 @@ impl<'a> SeqAct<'a> for ActorType {
             Self::Command(c) => c.run(p),
             Self::Transform(t) => t.run(p),
             Self::Javascript(j) => j.run(p),
+            Self::Json(j) => j.run(p),
         }
     }
 }
diff --git a/backend/src/runtime/actors/json_actor.rs b/backend/src/runtime/actors/json_actor.rs
new file mode 100644
index 0000000..ce8d628
--- /dev/null
+++ b/backend/src/runtime/actors/json_actor.rs
@@ -0,0 +1,77 @@
+use usdpl_back::core::serdes::Primitive;
+
+use jmespath::{Expression, Variable};
+
+use crate::config::JsonAction;
+use super::{SeqAct, ActError};
+
+pub struct JsonActor {
+    expr: Expression<'static>,
+}
+
+impl JsonActor {
+    fn jmespath_value_to_primitive(var: Variable) -> Primitive {
+        match var {
+            Variable::Null => Primitive::Empty,
+            Variable::String(s) => Primitive::String(s),
+            Variable::Bool(b) => Primitive::Bool(b),
+            Variable::Number(f) => f.as_f64().map(|x| Primitive::F64(x)).unwrap_or(Primitive::Empty),
+            Variable::Array(arr) => serde_json::to_string(&arr)
+                                        .map(Primitive::Json)
+                                        .unwrap_or(Primitive::Empty),
+            Variable::Object(obj) => serde_json::to_string(&obj)
+                                        .map(Primitive::Json)
+                                        .unwrap_or(Primitive::Empty),
+            Variable::Expref(_) => {
+                log::warn!("The jmespath result cannot be another jmespath");
+                Primitive::Empty
+            }
+        }
+    }
+}
+
+impl<'a> SeqAct<'a> for JsonActor {
+    type BuildParam = ();
+    type Config = JsonAction;
+
+    fn build(config: &'a Self::Config, _: Self::BuildParam) -> Result<Self, ActError> {
+        Ok(
+            Self {
+                expr: jmespath::compile(&config.jmespath)
+                    .map_err(|e| format!("Failed to compile jmespath `{}`: {}", config.jmespath, e))?,
+            }
+        )
+    }
+
+    fn run(self, parameter: Primitive) -> Primitive {
+        match parameter {
+            Primitive::Json(json) => {
+                match Variable::from_json(&json) {
+                    Ok(var) => {
+                        match self.expr.search(var) {
+                            Ok(result) => Self::jmespath_value_to_primitive(
+                                std::sync::Arc::try_unwrap(result)
+                                    .unwrap_or_else(|e| {
+                                        log::debug!("Cloning jmespath search result");
+                                        (*e).clone()
+                                    })
+                            ),
+                            Err(e) => {
+                                log::error!("Cannot search through JSON `{}`: {}", json, e);
+                                Primitive::Empty
+                            }
+                        }
+                    },
+                    Err(e) => {
+                        log::error!("Cannot convert to jmespath Variable from JSON `{}`: {}", json, e);
+                        Primitive::Empty
+                    }
+                }
+            },
+            _ => {
+                log::error!("Cannot apply JSON action to non-JSON primitive");
+                Primitive::Empty
+            },
+        }
+    }
+}
diff --git a/backend/src/runtime/actors/mod.rs b/backend/src/runtime/actors/mod.rs
index 00ccaeb..58b3b3e 100644
--- a/backend/src/runtime/actors/mod.rs
+++ b/backend/src/runtime/actors/mod.rs
@@ -1,6 +1,7 @@
 mod actor;
 mod command_actor;
 mod javascript_actor;
+mod json_actor;
 mod periodic_actor;
 mod sequential_actor;
 mod transform_actor;
@@ -8,6 +9,7 @@ mod transform_actor;
 pub use actor::{Actor, Act, ActError, ActorType, SeqAct, SeqActor, TopLevelActorType};
 pub use command_actor::CommandActor;
 pub use javascript_actor::JavascriptActor;
+pub use json_actor::JsonActor;
 pub use periodic_actor::PeriodicActor;
 pub use sequential_actor::SequenceActor;
 pub use transform_actor::TransformActor;
diff --git a/package.json b/package.json
index 97abca7..989942c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "caylon",
-  "version": "0.0.1",
+  "version": "0.1.0",
   "description": "Better than the Borg",
   "scripts": {
     "build": "shx rm -rf dist && rollup -c",
diff --git a/src/index.tsx b/src/index.tsx
index 690db7d..b3ba287 100755
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -40,19 +40,19 @@ function displayCallback(index: number) {
       switch (newVal.result) {
         case "value":
           let val = newVal as backend.CValueResult;
-          console.log("KAYLON: Got display for " + index.toString(), val);
+          console.log("CAYLON: Got display for " + index.toString(), val);
           set_value(DISPLAY_KEY + index.toString(), val.value);
           break;
         case "error":
           let err = newVal as backend.CErrorResult;
-          console.warn("KAYLON: Got display error for " + index.toString(), err);
+          console.warn("CAYLON: Got display error for " + index.toString(), err);
           break;
         default:
-          console.error("KAYLON: Got invalid display response for " + index.toString(), newVal);
+          console.error("CAYLON: Got invalid display response for " + index.toString(), newVal);
           break;
       }
     } else {
-      console.warn("KAYLON: Ignoring null display result for " + index.toString());
+      console.warn("CAYLON: Ignoring null display result for " + index.toString());
     }
     updateTasks.push(() => backend.resolve(backend.getDisplay(index), displayCallback(index)));
     update();
@@ -61,7 +61,7 @@ function displayCallback(index: number) {
 
 function onGetElements() {
   for (let i = 0; i < items.length; i++) {
-    console.log("KAYLON: req display for item #" + i.toString());
+    console.log("CAYLON: req display for item #" + i.toString());
     backend.resolve(backend.getDisplay(i), displayCallback(i));
   }
   backend.resolve(backend.getJavascriptToRun(), jsCallback());
@@ -77,16 +77,16 @@ function jsCallback() {
       switch (script.result) {
         case "javascript":
           let toRun = script as backend.CJavascriptResult;
-          console.log("KAYLON: Got javascript " + toRun.id.toString(), toRun);
+          console.log("CAYLON: Got javascript " + toRun.id.toString(), toRun);
           let result = eval2(toRun.raw);
           backend.onJavascriptResult(toRun.id, result);
           break;
         case "error":
           let err = script as backend.CErrorResult;
-          console.warn("KAYLON: Got javascript retrieval error", err);
+          console.warn("CAYLON: Got javascript retrieval error", err);
           break;
         default:
-          console.error("KAYLON: Got invalid javascript response", script);
+          console.error("CAYLON: Got invalid javascript response", script);
           break;
       }
     }
@@ -100,14 +100,14 @@ function jsCallback() {
   let about_promise = backend.getAbout();
   let elements_promise = backend.getElements();
   about = await about_promise;
-  console.log("KAYLON: got about", about);
+  console.log("CAYLON: got about", about);
   let result = await elements_promise;
-  console.log("KAYLON: got elements", result);
+  console.log("CAYLON: got elements", result);
   if (result != null) {
     items = result;
     onGetElements();
   } else {
-    console.warn("KAYLON: backend connection failed");
+    console.warn("CAYLON: backend connection failed");
   }
   backend.resolve(backend.getJavascriptToRun(), jsCallback());
 })();
@@ -146,19 +146,19 @@ const Content: VFC<{ serverAPI: ServerAPI }> = ({}) => {
             backend.resolve(backend.reload(),
               (reload_items: backend.CElement[]) => {
                 items = reload_items;
-                console.log("KAYLON: got elements", reload_items);
+                console.log("CAYLON: got elements", reload_items);
                 if (reload_items != null) {
                   items = reload_items;
                   onGetElements();
                 } else {
-                  console.warn("KAYLON: backend connection failed");
+                  console.warn("CAYLON: backend connection failed");
                 }
                 update();
               });
             backend.resolve(backend.getAbout(),
               (new_about: backend.CAbout) => {
                 about = new_about;
-                console.log("KAYLON: got about", about);
+                console.log("CAYLON: got about", about);
                 update();
               });
           }}>
@@ -182,7 +182,7 @@ function buildHtmlElement(element: backend.CElement, index: number, updateIdc: a
     case "result-display":
       return buildResultDisplay(element as backend.CResultDisplay, index, updateIdc);
   }
-  console.error("KAYLON: Unsupported element", element);
+  console.error("CAYLON: Unsupported element", element);
   return <div>Unsupported</div>;
 }