diff --git a/espanso/src/cli/worker/engine/mod.rs b/espanso/src/cli/worker/engine/mod.rs
index edf0cef..aac0cc0 100644
--- a/espanso/src/cli/worker/engine/mod.rs
+++ b/espanso/src/cli/worker/engine/mod.rs
@@ -54,7 +54,8 @@ pub fn initialize_and_spawn(
         super::engine::matcher::convert::MatchConverter::new(&*config_store, &*match_store);
       let match_cache = super::engine::match_cache::MatchCache::load(&*config_store, &*match_store);
 
-      let modulo_manager = ui::modulo::ModuloManager::new();
+      let modulo_manager = crate::gui::modulo::manager::ModuloManager::new();
+      let modulo_form_ui = crate::gui::modulo::form::ModuloFormUI::new(&modulo_manager, icon_paths.form_icon);
 
       let (detect_source, modifier_state_store, sequencer) =
         super::engine::source::init_and_spawn().expect("failed to initialize detector module");
@@ -94,8 +95,7 @@ pub fn initialize_and_spawn(
         &paths.packages,
       );
       let shell_extension = espanso_render::extension::shell::ShellExtension::new(&paths.config);
-      let form_adapter =
-        ui::modulo::form::ModuloFormProviderAdapter::new(&modulo_manager, icon_paths.form_icon);
+      let form_adapter = ui::form::FormProviderAdapter::new(&modulo_form_ui);
       let form_extension = espanso_render::extension::form::FormExtension::new(&form_adapter);
       let renderer = espanso_render::create(vec![
         &clipboard_extension,
diff --git a/espanso/src/cli/worker/engine/ui/form.rs b/espanso/src/cli/worker/engine/ui/form.rs
new file mode 100644
index 0000000..c161919
--- /dev/null
+++ b/espanso/src/cli/worker/engine/ui/form.rs
@@ -0,0 +1,117 @@
+/*
+ * This file is part of espanso.
+ *
+ * Copyright (C) 2019-2021 Federico Terzi
+ *
+ * espanso is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * espanso is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+use std::collections::HashMap;
+
+use espanso_render::{
+  extension::form::{FormProvider, FormProviderResult},
+  Params, Value,
+};
+use log::error;
+
+use crate::gui::{FormField, FormUI};
+
+pub struct FormProviderAdapter<'a> {
+  form_ui: &'a dyn FormUI,
+}
+
+impl<'a> FormProviderAdapter<'a> {
+  pub fn new(form_ui: &'a dyn FormUI) -> Self {
+    Self { form_ui }
+  }
+}
+
+impl<'a> FormProvider for FormProviderAdapter<'a> {
+  fn show(&self, layout: &str, fields: &Params, _: &Params) -> FormProviderResult {
+    let fields = convert_fields(fields);
+    match self.form_ui.show(layout, &fields) {
+      Ok(Some(results)) => FormProviderResult::Success(results),
+      Ok(None) => FormProviderResult::Aborted,
+      Err(err) => FormProviderResult::Error(err),
+    }
+  }
+}
+
+// TODO: test
+fn convert_fields(fields: &Params) -> HashMap<String, FormField> {
+  let mut out = HashMap::new();
+  for (name, field) in fields {
+    let mut form_field = None;
+
+    if let Value::Object(params) = field {
+      if let Some(Value::String(field_type)) = params.get("type") {
+        form_field = match field_type.as_str() {
+          "text" => Some(FormField::Text {
+            default: params
+              .get("default")
+              .and_then(|val| val.as_string())
+              .cloned(),
+            multiline: params
+              .get("multiline")
+              .and_then(|val| val.as_bool())
+              .cloned()
+              .unwrap_or(false),
+          }),
+          "choice" => Some(FormField::Choice {
+            default: params
+              .get("default")
+              .and_then(|val| val.as_string())
+              .cloned(),
+            values: params
+              .get("values")
+              .and_then(|val| val.as_array())
+              .map(|arr| {
+                arr
+                  .into_iter()
+                  .flat_map(|choice| choice.as_string())
+                  .cloned()
+                  .collect()
+              })
+              .unwrap_or_default(),
+          }),
+          "list" => Some(FormField::List {
+            default: params
+              .get("default")
+              .and_then(|val| val.as_string())
+              .cloned(),
+            values: params
+              .get("values")
+              .and_then(|val| val.as_array())
+              .map(|arr| {
+                arr
+                  .into_iter()
+                  .flat_map(|choice| choice.as_string())
+                  .cloned()
+                  .collect()
+              })
+              .unwrap_or_default(),
+          }),
+          _ => None,
+        }
+      }
+    }
+
+    if let Some(form_field) = form_field {
+      out.insert(name.clone(), form_field);
+    } else {
+      error!("malformed form field format for '{}'", name);
+    }
+  }
+  out
+}
diff --git a/espanso/src/cli/worker/engine/ui/mod.rs b/espanso/src/cli/worker/engine/ui/mod.rs
index 4fa4de6..a55dc66 100644
--- a/espanso/src/cli/worker/engine/ui/mod.rs
+++ b/espanso/src/cli/worker/engine/ui/mod.rs
@@ -17,5 +17,5 @@
  * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-pub mod modulo;
+pub mod form;
 pub mod selector;
\ No newline at end of file
diff --git a/espanso/src/cli/worker/engine/ui/modulo/form.rs b/espanso/src/cli/worker/engine/ui/modulo/form.rs
deleted file mode 100644
index cd60e13..0000000
--- a/espanso/src/cli/worker/engine/ui/modulo/form.rs
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * This file is part of espanso.
- *
- * Copyright (C) 2019-2021 Federico Terzi
- *
- * espanso is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * espanso is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-use std::{collections::HashMap, path::PathBuf};
-
-use super::ModuloManager;
-use anyhow::Result;
-use espanso_render::extension::form::{FormProvider, FormProviderResult};
-use log::{error};
-use serde::Serialize;
-use serde_json::{Map, Value};
-
-pub struct ModuloFormProviderAdapter<'a> {
-  manager: &'a ModuloManager,
-  icon_path: Option<String>,
-}
-
-impl<'a> ModuloFormProviderAdapter<'a> {
-  pub fn new(manager: &'a ModuloManager, icon_path: Option<PathBuf>) -> Self {
-    Self {
-      manager,
-      icon_path: icon_path.map(|path| path.to_string_lossy().to_string()),
-    }
-  }
-}
-
-impl<'a> FormProvider for ModuloFormProviderAdapter<'a> {
-  fn show(
-    &self,
-    layout: &str,
-    fields: &espanso_render::Params,
-    _: &espanso_render::Params,
-  ) -> FormProviderResult {
-    let modulo_form_config = ModuloFormConfig {
-      icon: self.icon_path.as_deref(),
-      title: "espanso",
-      layout,
-      fields: convert_params_into_object(fields),
-    };
-
-    match serde_json::to_string(&modulo_form_config) {
-      Ok(json_config) => {
-        match self
-          .manager
-          .invoke(&["form", "-j", "-i", "-"], &json_config)
-        {
-          Ok(output) => {
-            let json: Result<HashMap<String, String>, _> = serde_json::from_str(&output);
-            match json {
-              Ok(json) => {
-                if json.is_empty() {
-                  return FormProviderResult::Aborted;
-                } else {
-                  return FormProviderResult::Success(json);
-                }
-              }
-              Err(error) => {
-                return FormProviderResult::Error(error.into());
-              }
-            }
-          }
-          Err(err) => {
-            return FormProviderResult::Error(err.into());
-          }
-        }
-      }
-      Err(err) => {
-        return FormProviderResult::Error(err.into());
-      }
-    }
-  }
-}
-
-#[derive(Debug, Serialize)]
-struct ModuloFormConfig<'a> {
-  icon: Option<&'a str>,
-  title: &'a str,
-  layout: &'a str,
-  fields: Map<String, Value>,
-}
-
-// TODO: test
-fn convert_params_into_object(params: &espanso_render::Params) -> Map<String, Value> {
-  let mut obj = Map::new();
-  for (field, value) in params {
-    obj.insert(field.clone(), convert_value(value));
-  }
-  obj
-}
-
-// TODO: test
-fn convert_value(value: &espanso_render::Value) -> Value {
-  match value {
-    espanso_render::Value::Null => Value::Null,
-    espanso_render::Value::Bool(value) => Value::Bool(*value),
-    espanso_render::Value::Number(num) => match num {
-      espanso_render::Number::Integer(val) => Value::Number((*val).into()),
-      espanso_render::Number::Float(val) => {
-        Value::Number(serde_json::Number::from_f64(*val).unwrap_or_else(|| {
-          error!("unable to convert float value to json");
-          0.into()
-        }))
-      }
-    },
-    espanso_render::Value::String(value) => Value::String(value.clone()),
-    espanso_render::Value::Array(arr) => Value::Array(arr.into_iter().map(convert_value).collect()),
-    espanso_render::Value::Object(obj) => Value::Object(convert_params_into_object(obj)),
-  }
-}
diff --git a/espanso/src/gui/mod.rs b/espanso/src/gui/mod.rs
new file mode 100644
index 0000000..39a93b5
--- /dev/null
+++ b/espanso/src/gui/mod.rs
@@ -0,0 +1,55 @@
+/*
+ * This file is part of espanso.
+ *
+ * Copyright (C) 2019-2021 Federico Terzi
+ *
+ * espanso is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * espanso is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+use std::collections::HashMap;
+
+use anyhow::Result;
+
+pub mod modulo;
+
+pub trait SearchUI {
+  fn show(&self, items: &SearchItem) -> Result<Option<String>>;
+}
+
+#[derive(Debug)]
+pub struct SearchItem {
+  pub id: String,
+  pub label: String,
+  pub tag: Option<String>,
+}
+
+pub trait FormUI {
+  fn show(&self, layout: &str, fields: &HashMap<String, FormField>) -> Result<Option<HashMap<String, String>>>;
+}
+
+#[derive(Debug)]
+pub enum FormField {
+  Text {
+    default: Option<String>,
+    multiline: bool,
+  },
+  Choice {
+    default: Option<String>,
+    values: Vec<String>,
+  },
+  List {
+    default: Option<String>,
+    values: Vec<String>,
+  }
+}
\ No newline at end of file
diff --git a/espanso/src/gui/modulo/form.rs b/espanso/src/gui/modulo/form.rs
new file mode 100644
index 0000000..91be259
--- /dev/null
+++ b/espanso/src/gui/modulo/form.rs
@@ -0,0 +1,107 @@
+/*
+ * This file is part of espanso.
+ *
+ * Copyright (C) 2019-2021 Federico Terzi
+ *
+ * espanso is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * espanso is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+use serde::Serialize;
+use serde_json::{json, Map, Value};
+use std::{collections::HashMap, path::PathBuf};
+
+use crate::gui::{FormField, FormUI};
+
+use super::manager::ModuloManager;
+
+pub struct ModuloFormUI<'a> {
+  manager: &'a ModuloManager,
+  icon_path: Option<String>,
+}
+
+impl<'a> ModuloFormUI<'a> {
+  pub fn new(manager: &'a ModuloManager, icon_path: Option<PathBuf>) -> Self {
+    Self {
+      manager,
+      icon_path: icon_path.map(|path| path.to_string_lossy().to_string()),
+    }
+  }
+}
+
+impl<'a> FormUI for ModuloFormUI<'a> {
+  fn show(
+    &self,
+    layout: &str,
+    fields: &HashMap<String, FormField>,
+  ) -> anyhow::Result<Option<HashMap<String, String>>> {
+    let modulo_form_config = ModuloFormConfig {
+      icon: self.icon_path.as_deref(),
+      title: "espanso",
+      layout,
+      fields: convert_fields_into_object(fields),
+    };
+
+    let json_config = serde_json::to_string(&modulo_form_config)?;
+    let output = self
+      .manager
+      .invoke(&["form", "-j", "-i", "-"], &json_config)?;
+    let json: Result<HashMap<String, String>, _> = serde_json::from_str(&output);
+    match json {
+      Ok(json) => {
+        if json.is_empty() {
+          return Ok(None);
+        } else {
+          return Ok(Some(json));
+        }
+      }
+      Err(error) => {
+        return Err(error.into());
+      }
+    }
+  }
+}
+
+#[derive(Debug, Serialize)]
+struct ModuloFormConfig<'a> {
+  icon: Option<&'a str>,
+  title: &'a str,
+  layout: &'a str,
+  fields: Map<String, Value>,
+}
+
+// TODO: test
+fn convert_fields_into_object(fields: &HashMap<String, FormField>) -> Map<String, Value> {
+  let mut obj = Map::new();
+  for (name, field) in fields {
+    let value = match field {
+      FormField::Text { default, multiline } => json!({
+        "type": "text",
+        "default": default,
+        "multiline": multiline,
+      }),
+      FormField::Choice { default, values } => json!({
+        "type": "choice",
+        "default": default,
+        "values": values,
+      }),
+      FormField::List { default, values } => json!({
+        "type": "list",
+        "default": default,
+        "values": values,
+      }),
+    };
+    obj.insert(name.clone(), value);
+  }
+  obj
+}
diff --git a/espanso/src/cli/worker/engine/ui/modulo/mod.rs b/espanso/src/gui/modulo/manager.rs
similarity index 99%
rename from espanso/src/cli/worker/engine/ui/modulo/mod.rs
rename to espanso/src/gui/modulo/manager.rs
index d809fa7..c849824 100644
--- a/espanso/src/cli/worker/engine/ui/modulo/mod.rs
+++ b/espanso/src/gui/modulo/manager.rs
@@ -23,8 +23,6 @@ use std::io::Write;
 use std::process::Command;
 use thiserror::Error;
 
-pub mod form;
-
 pub struct ModuloManager {
   modulo_path: Option<String>,
 }
diff --git a/espanso/src/gui/modulo/mod.rs b/espanso/src/gui/modulo/mod.rs
new file mode 100644
index 0000000..8c170f3
--- /dev/null
+++ b/espanso/src/gui/modulo/mod.rs
@@ -0,0 +1,23 @@
+/*
+ * This file is part of espanso.
+ *
+ * Copyright (C) 2019-2021 Federico Terzi
+ *
+ * espanso is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * espanso is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with espanso.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+pub mod form;
+pub mod manager;
+
+// TODO: implement FormUI and SearchUI traits using ModuloManager
\ No newline at end of file
diff --git a/espanso/src/main.rs b/espanso/src/main.rs
index 366fc62..d0dfa5d 100644
--- a/espanso/src/main.rs
+++ b/espanso/src/main.rs
@@ -32,6 +32,7 @@ use simplelog::{
 
 mod cli;
 mod engine;
+mod gui;
 mod logging;
 mod util;