diff --git a/Packages/macOS/CmuxTerminalCore/Sources/CmuxTerminalCore/ConfigDiscovery/GhosttyConfigDiscovery.swift b/Packages/macOS/CmuxTerminalCore/Sources/CmuxTerminalCore/ConfigDiscovery/GhosttyConfigDiscovery.swift
index 12299081a5c0..47b6977a7ed5 100644
--- a/Packages/macOS/CmuxTerminalCore/Sources/CmuxTerminalCore/ConfigDiscovery/GhosttyConfigDiscovery.swift
+++ b/Packages/macOS/CmuxTerminalCore/Sources/CmuxTerminalCore/ConfigDiscovery/GhosttyConfigDiscovery.swift
@@ -500,8 +500,8 @@ public struct GhosttyConfigDiscovery {
     }
 
     /// Whether cmux should load the legacy `config` file because the new
-    /// `config.ghostty` is empty (size 0). Only true when the legacy file is
-    /// non-empty and the new file is exactly empty.
+    /// `config.ghostty` is missing or empty. Only true when the legacy file is
+    /// non-empty and the new file is absent or exactly empty.
     ///
     /// Pure with respect to its inputs; an instance method (not a static
     /// namespace member) so call sites invoke it on the held discovery value
@@ -511,6 +511,7 @@ public struct GhosttyConfigDiscovery {
         legacyConfigFileSize: Int?
     ) -> Bool {
         guard let legacyConfigFileSize, legacyConfigFileSize > 0 else { return false }
+        guard let newConfigFileSize else { return true }
         return newConfigFileSize == 0
     }
 
diff --git a/Packages/macOS/CmuxTerminalCore/Tests/CmuxTerminalCoreTests/GhosttyConfigDiscoveryTests.swift b/Packages/macOS/CmuxTerminalCore/Tests/CmuxTerminalCoreTests/GhosttyConfigDiscoveryTests.swift
index 4009562a1cf7..a02926ea87d4 100644
--- a/Packages/macOS/CmuxTerminalCore/Tests/CmuxTerminalCoreTests/GhosttyConfigDiscoveryTests.swift
+++ b/Packages/macOS/CmuxTerminalCore/Tests/CmuxTerminalCoreTests/GhosttyConfigDiscoveryTests.swift
@@ -117,11 +117,11 @@ private struct NoFontProbe: GhosttyFontProbing {
 @Suite struct GhosttyConfigDiscoveryLegacyTests {
     private let discovery = GhosttyConfigDiscovery(fontProbe: NoFontProbe())
 
-    @Test func loadLegacyOnlyWhenNewIsEmptyAndLegacyNonEmpty() {
+    @Test func loadLegacyWhenNewIsMissingOrEmptyAndLegacyNonEmpty() {
         #expect(discovery.shouldLoadLegacyGhosttyConfig(newConfigFileSize: 0, legacyConfigFileSize: 10))
+        #expect(discovery.shouldLoadLegacyGhosttyConfig(newConfigFileSize: nil, legacyConfigFileSize: 10))
         #expect(!discovery.shouldLoadLegacyGhosttyConfig(newConfigFileSize: 5, legacyConfigFileSize: 10))
         #expect(!discovery.shouldLoadLegacyGhosttyConfig(newConfigFileSize: 0, legacyConfigFileSize: 0))
-        #expect(!discovery.shouldLoadLegacyGhosttyConfig(newConfigFileSize: nil, legacyConfigFileSize: 10))
     }
 
     @Test func includeLegacyInScanPathsWhenNewMissingOrEmpty() {
diff --git a/Sources/GhosttyTerminalView.swift b/Sources/GhosttyTerminalView.swift
index 20bf2723e463..0eceaf52b3d7 100644
--- a/Sources/GhosttyTerminalView.swift
+++ b/Sources/GhosttyTerminalView.swift
@@ -5900,6 +5900,11 @@ class GhosttyNSView: NSView, NSUserInterfaceValidations {
             keyEvent.composing = false
             for text in accumulatedText {
                 if shouldSendText(text) {
+                    if markedTextBefore {
+                        imeConsumedKeyUps.insert(event.keyCode)
+                        sendCommittedIMETextToSurface(text, action: action, sourceEvent: event)
+                        continue
+                    }
 #if DEBUG
                     let sendTimingStart = CmuxTypingTiming.start()
                     let ghosttySendStart = ProcessInfo.processInfo.systemUptime
@@ -5927,7 +5932,7 @@ class GhosttyNSView: NSView, NSUserInterfaceValidations {
                         extra: "textBytes=\(text.utf8.count)"
                     )
 #endif
-                } else {
+                } else if !markedTextBefore {
                     keyEvent.consumed_mods = GHOSTTY_MODS_NONE
                     keyEvent.text = nil
                     #if DEBUG
@@ -6046,6 +6051,38 @@ class GhosttyNSView: NSView, NSUserInterfaceValidations {
         // Rendering is driven by Ghostty's wakeups/renderer.
     }
 
+    @discardableResult
+    private func sendCommittedIMETextToSurface(
+        _ text: String,
+        action: ghostty_input_action_e,
+        sourceEvent: NSEvent
+    ) -> Bool {
+        guard let surface else { return false }
+
+        var keyEvent = ghostty_input_key_s()
+        keyEvent.action = action
+        keyEvent.keycode = 0
+        keyEvent.mods = GHOSTTY_MODS_NONE
+        keyEvent.consumed_mods = GHOSTTY_MODS_NONE
+        keyEvent.unshifted_codepoint = 0
+        keyEvent.composing = false
+
+        return text.withCString { ptr in
+            keyEvent.text = ptr
+#if DEBUG
+            return sendTimedGhosttyKey(
+                surface,
+                keyEvent,
+                path: "terminal.keyDown.committedIMETextGhosttySend",
+                event: sourceEvent,
+                extra: "textBytes=\(text.utf8.count)"
+            )
+#else
+            return sendGhosttyKey(surface, keyEvent)
+#endif
+        }
+    }
+
     @discardableResult
     private func sendGhosttyKey(_ surface: ghostty_surface_t, _ keyEvent: ghostty_input_key_s) -> Bool {
 #if DEBUG
diff --git a/cmuxTests/CJKIMEMarkedSelectionTests.swift b/cmuxTests/CJKIMEMarkedSelectionTests.swift
index d0af6f06a2f6..8051d72ddeb8 100644
--- a/cmuxTests/CJKIMEMarkedSelectionTests.swift
+++ b/cmuxTests/CJKIMEMarkedSelectionTests.swift
@@ -214,6 +214,97 @@ final class CJKIMEMarkedSelectionTests: XCTestCase {
         )
     }
 
+    func testControlJCommitWhileMarkedTextIsActiveSendsOnlyCommittedText() throws {
+        let hostedTerminal = try makeHostedTerminalWindow()
+        let terminalSurface = hostedTerminal.surface
+        let window = hostedTerminal.window
+        let surfaceView = hostedTerminal.surfaceView
+        let previousKeyEventObserver = GhosttyNSView.debugGhosttySurfaceKeyEventObserver
+        let previousInputSourceOverride = KeyboardLayout.debugInputSourceIdOverride
+        let previousInterpretHook = cjkIMEInterpretKeyEventsHook
+        defer {
+            GhosttyNSView.debugGhosttySurfaceKeyEventObserver = previousKeyEventObserver
+            KeyboardLayout.debugInputSourceIdOverride = previousInputSourceOverride
+            cjkIMEInterpretKeyEventsHook = previousInterpretHook
+            window.orderOut(nil)
+            withExtendedLifetime(terminalSurface) {}
+        }
+
+        KeyboardLayout.debugInputSourceIdOverride = "com.apple.inputmethod.Kotoeri.RomajiTyping.Japanese"
+        installCJKIMEInterpretKeyEventsSwizzle()
+        cjkIMEInterpretKeyEventsHook = { candidateView, _ in
+            guard candidateView === surfaceView else { return false }
+            candidateView.insertText("日本", replacementRange: NSRange(location: 0, length: 2))
+            candidateView.setMarkedText(
+                "語",
+                selectedRange: NSRange(location: 1, length: 0),
+                replacementRange: NSRange(location: NSNotFound, length: 0)
+            )
+            return true
+        }
+
+        var pressedText: [(text: String, keyCode: UInt32, mods: UInt32)] = []
+        var pressedControlKeyCodes: [UInt32] = []
+        var releasedControlKeyCodes: [UInt32] = []
+        GhosttyNSView.debugGhosttySurfaceKeyEventObserver = { keyEvent in
+            previousKeyEventObserver?(keyEvent)
+            if keyEvent.action == GHOSTTY_ACTION_PRESS, let text = keyEvent.text {
+                pressedText.append((String(cString: text), keyEvent.keycode, keyEvent.mods.rawValue))
+            } else if keyEvent.action == GHOSTTY_ACTION_PRESS,
+                      keyEvent.mods.rawValue & GHOSTTY_MODS_CTRL.rawValue != 0 {
+                pressedControlKeyCodes.append(keyEvent.keycode)
+            } else if keyEvent.action == GHOSTTY_ACTION_RELEASE,
+                      keyEvent.mods.rawValue & GHOSTTY_MODS_CTRL.rawValue != 0 {
+                releasedControlKeyCodes.append(keyEvent.keycode)
+            }
+        }
+
+        surfaceView.setMarkedText(
+            "にほんご",
+            selectedRange: NSRange(location: 0, length: 2),
+            replacementRange: NSRange(location: NSNotFound, length: 0)
+        )
+
+        let event = try XCTUnwrap(NSEvent.keyEvent(
+            with: .keyDown,
+            location: .zero,
+            modifierFlags: [.control],
+            timestamp: ProcessInfo.processInfo.systemUptime,
+            windowNumber: window.windowNumber,
+            context: nil,
+            characters: "\n",
+            charactersIgnoringModifiers: "j",
+            isARepeat: false,
+            keyCode: UInt16(kVK_ANSI_J)
+        ))
+        let keyUp = try XCTUnwrap(NSEvent.keyEvent(
+            with: .keyUp,
+            location: .zero,
+            modifierFlags: [.control],
+            timestamp: ProcessInfo.processInfo.systemUptime,
+            windowNumber: window.windowNumber,
+            context: nil,
+            characters: "\n",
+            charactersIgnoringModifiers: "j",
+            isARepeat: false,
+            keyCode: UInt16(kVK_ANSI_J)
+        ))
+
+        window.makeFirstResponder(surfaceView)
+        withExtendedLifetime(terminalSurface) {
+            surfaceView.keyDown(with: event)
+            surfaceView.keyUp(with: keyUp)
+        }
+
+        XCTAssertEqual(pressedText.map(\.text), ["日本"])
+        XCTAssertEqual(pressedText.map(\.keyCode), [0])
+        XCTAssertEqual(pressedText.map(\.mods), [GHOSTTY_MODS_NONE.rawValue])
+        XCTAssertEqual(pressedControlKeyCodes, [])
+        XCTAssertEqual(releasedControlKeyCodes, [])
+        XCTAssertTrue(surfaceView.hasMarkedText(), "Remaining IME segments should stay in preedit")
+        XCTAssertEqual(surfaceView.attributedString().string, "語")
+    }
+
     func testKeyDownForKoreanPostCompositionHorizontalArrowsForwardsToTerminal() throws {
         let hostedTerminal = try makeHostedTerminalWindow()
         let terminalSurface = hostedTerminal.surface
diff --git a/cmuxTests/GhosttyConfigTests.swift b/cmuxTests/GhosttyConfigTests.swift
index 12c40f7ee472..64b050cff5b0 100644
--- a/cmuxTests/GhosttyConfigTests.swift
+++ b/cmuxTests/GhosttyConfigTests.swift
@@ -890,8 +890,8 @@ final class GhosttyConfigTests: XCTestCase {
         )
     }
 
-    func testLegacyConfigFallbackDoesNotReloadLegacyFileWhenConfigGhosttyIsMissing() {
-        XCTAssertFalse(
+    func testLegacyConfigFallbackUsesLegacyFileWhenConfigGhosttyIsMissing() {
+        XCTAssertTrue(
             GhosttyApp.shouldLoadLegacyGhosttyConfig(
                 newConfigFileSize: nil,
                 legacyConfigFileSize: 42