refactor: remove Input Monitoring permission requirement from onboarding

Simplify the onboarding permission flow from 3 steps (Accessibility,
Input Monitoring, Screen Recording) to 2 steps (Accessibility, Screen
Recording). Input Monitoring checks and IOKit FFI bindings are removed
from permissions.rs and PermissionsStep.tsx. The CGEventTap at HID
level receives cross-app keyboard events without needing a TCC entry.

Signed-off-by: Logan Nguyen <lg.131.dev@gmail.com>

Author: quiet-node

CLAUDE.md

@@ -110,7 +110,7 @@ Never commit files generated by superpowers skills (design specs, implementation
 
 - **macOS only** — uses NSPanel, Core Graphics event taps, macOS Control key
 - **Privacy-first** — Ollama runs locally; Docker sandbox drops all capabilities and isolates network
-- **Three permissions required** — Accessibility (CGEventTap creation), Input Monitoring (cross-app key delivery), Screen Recording (/screen command)
+- **Two permissions required** — Accessibility (CGEventTap creation), Screen Recording (/screen command)
 
 ### CGEventTap configuration — DO NOT CHANGE these two settings
 

src-tauri/src/activator.rs

@@ -247,12 +247,6 @@ fn try_initialize_tap<F>(is_active: &Arc<AtomicBool>, on_activation: &Arc<F>) ->
 where
     F: Fn() + Send + Sync + 'static,
 {
-    let im_granted = crate::permissions::is_input_monitoring_granted();
-    eprintln!(
-        "thuki: [activator] Input Monitoring permission: granted={im_granted} \
-         (cross-app hotkey requires this)"
-    );
-
     let state = Arc::new(Mutex::new(ActivationState {
         last_trigger: None,
         is_pressed: false,

src-tauri/src/lib.rs

@@ -402,9 +402,8 @@ fn notify_frontend_ready(app_handle: tauri::AppHandle, db: tauri::State<history:
                 // screen again on the next launch.
                 let ax = permissions::is_accessibility_granted();
                 let sr = permissions::is_screen_recording_granted();
-                let im = permissions::is_input_monitoring_granted();
 
-                if !ax || !sr || !im {
+                if !ax || !sr {
                     let _ = onboarding::set_stage(&conn, &onboarding::OnboardingStage::Permissions);
                     show_onboarding_window(&app_handle, onboarding::OnboardingStage::Permissions);
                     return;
@@ -762,12 +761,6 @@ pub fn run() {
             #[cfg(not(coverage))]
             permissions::open_accessibility_settings,
             #[cfg(not(coverage))]
-            permissions::check_input_monitoring_permission,
-            #[cfg(not(coverage))]
-            permissions::request_input_monitoring_access,
-            #[cfg(not(coverage))]
-            permissions::open_input_monitoring_settings,
-            #[cfg(not(coverage))]
             permissions::check_screen_recording_permission,
             #[cfg(not(coverage))]
             permissions::open_screen_recording_settings,

src-tauri/src/permissions.rs

@@ -14,18 +14,11 @@
 
 /// Returns `true` when at least one required permission has not been granted.
 ///
-/// All three permissions must be granted for Thuki to function fully:
-/// - Accessibility: required to create the CGEventTap
-/// - Input Monitoring: required for the tap to receive events from other apps
-/// - Screen Recording: required for the /screen command
-///
-/// If any is missing the onboarding screen is shown instead of the normal overlay.
-pub fn needs_onboarding(
-    accessibility: bool,
-    screen_recording: bool,
-    input_monitoring: bool,
-) -> bool {
-    !accessibility || !screen_recording || !input_monitoring
+/// Both Accessibility (hotkey listener) and Screen Recording (/screen command)
+/// must be granted for Thuki to function fully. If either is missing the
+/// onboarding screen is shown instead of the normal overlay.
+pub fn needs_onboarding(accessibility: bool, screen_recording: bool) -> bool {
+    !accessibility || !screen_recording
 }
 
 // ─── macOS Permission Checks ─────────────────────────────────────────────────
@@ -36,47 +29,13 @@ extern "C" {
     fn AXIsProcessTrusted() -> bool;
 }
 
-/// IOKit constants for Input Monitoring permission checks.
-#[cfg(target_os = "macos")]
-const IOHID_REQUEST_TYPE_LISTEN_EVENT: u32 = 1;
-#[cfg(target_os = "macos")]
-const IOHID_ACCESS_TYPE_GRANTED: u32 = 1;
-
-#[cfg(target_os = "macos")]
-#[link(name = "IOKit", kind = "framework")]
-extern "C" {
-    /// Checks whether the process has Input Monitoring access.
-    /// Returns kIOHIDAccessTypeGranted (1) if granted, 0 if not determined,
-    /// 2 if denied.
-    fn IOHIDCheckAccess(request_type: u32) -> u32;
-
-    /// Requests Input Monitoring access, showing the system permission dialog
-    /// on first call. Returns true if access was granted.
-    fn IOHIDRequestAccess(request_type: u32) -> bool;
-}
-
 /// Returns whether the process currently has Accessibility permission.
 #[cfg(target_os = "macos")]
 #[cfg_attr(coverage_nightly, coverage(off))]
 pub fn is_accessibility_granted() -> bool {
     unsafe { AXIsProcessTrusted() }
 }
 
-/// Returns whether the process currently has Input Monitoring permission.
-///
-/// Input Monitoring (`kTCCServiceListenEvent`) is required for a CGEventTap at
-/// HID level to receive keyboard events from other applications. Without it,
-/// the tap only sees events generated within the Thuki process itself, making
-/// the double-tap hotkey invisible when the user's focus is elsewhere.
-///
-/// Unlike Screen Recording, Input Monitoring does not require a process restart
-/// after being granted; the CGEventTap immediately begins receiving cross-app events.
-#[cfg(target_os = "macos")]
-#[cfg_attr(coverage_nightly, coverage(off))]
-pub fn is_input_monitoring_granted() -> bool {
-    unsafe { IOHIDCheckAccess(IOHID_REQUEST_TYPE_LISTEN_EVENT) == IOHID_ACCESS_TYPE_GRANTED }
-}
-
 /// Returns whether the process currently has Screen Recording permission.
 ///
 /// Uses `CGPreflightScreenCaptureAccess`, which only returns `true` after
@@ -102,44 +61,6 @@ pub fn check_accessibility_permission() -> bool {
     is_accessibility_granted()
 }
 
-/// Returns whether Input Monitoring permission has been granted.
-#[tauri::command]
-#[cfg(target_os = "macos")]
-#[cfg_attr(coverage_nightly, coverage(off))]
-pub fn check_input_monitoring_permission() -> bool {
-    is_input_monitoring_granted()
-}
-
-/// Triggers the macOS Input Monitoring permission dialog.
-///
-/// `IOHIDRequestAccess` registers the app in TCC and shows the system-level
-/// "X would like to monitor input events" prompt. If the user previously denied
-/// the permission, the dialog is skipped and the call returns false; the
-/// onboarding UI then directs the user to System Settings directly.
-#[tauri::command]
-#[cfg(target_os = "macos")]
-#[cfg_attr(coverage_nightly, coverage(off))]
-pub fn request_input_monitoring_access() {
-    unsafe {
-        IOHIDRequestAccess(IOHID_REQUEST_TYPE_LISTEN_EVENT);
-    }
-}
-
-/// Opens System Settings to the Input Monitoring privacy pane.
-#[tauri::command]
-#[cfg(target_os = "macos")]
-#[cfg_attr(coverage_nightly, coverage(off))]
-pub fn open_input_monitoring_settings() -> Result<(), String> {
-    std::process::Command::new("open")
-        .arg(
-            "x-apple.systempreferences:com.apple.preference.security\
-             ?Privacy_ListenEvent",
-        )
-        .spawn()
-        .map(|_| ())
-        .map_err(|e| e.to_string())
-}
-
 /// Opens System Settings to the Accessibility privacy pane so the user can
 /// enable the permission without encountering the native system popup.
 ///
@@ -244,27 +165,22 @@ mod tests {
     use super::*;
 
     #[test]
-    fn needs_onboarding_false_when_all_granted() {
-        assert!(!needs_onboarding(true, true, true));
+    fn needs_onboarding_false_when_both_granted() {
+        assert!(!needs_onboarding(true, true));
     }
 
     #[test]
     fn needs_onboarding_true_when_accessibility_missing() {
-        assert!(needs_onboarding(false, true, true));
+        assert!(needs_onboarding(false, true));
     }
 
     #[test]
     fn needs_onboarding_true_when_screen_recording_missing() {
-        assert!(needs_onboarding(true, false, true));
-    }
-
-    #[test]
-    fn needs_onboarding_true_when_input_monitoring_missing() {
-        assert!(needs_onboarding(true, true, false));
+        assert!(needs_onboarding(true, false));
     }
 
     #[test]
-    fn needs_onboarding_true_when_all_missing() {
-        assert!(needs_onboarding(false, false, false));
+    fn needs_onboarding_true_when_both_missing() {
+        assert!(needs_onboarding(false, false));
     }
 }