Hebrew fallback: Ivrix Mono He (uniform advance) + bundle Resources/Fonts

CHANGELOG.md

@@ -2,6 +2,45 @@
 
 All notable changes to cmux are documented here.
 
+## Ivrix [1.0.0] - 2026-07-28
+
+Ivrix is a Hebrew-first fork of cmux. This release rebases the fork onto the
+latest upstream cmux (1919 commits) and makes right-to-left text genuinely
+usable in a terminal.
+
+### Added
+- **Right-to-left rendering.** Hebrew rows are mirrored and right-anchored, per
+  UAX #9. The direction is resolved per row, so Latin rows are untouched.
+- **RTL/LTR toggle** in the window titlebar, applied to live terminals without a
+  restart.
+- **Bidi-aware cursor.** The cursor is placed by visual position, so it sits
+  beside the Hebrew it follows instead of at its logical column.
+- **Mirrored glyphs (UAX #9 rule L4).** A mirrorable character on a
+  right-to-left row renders as its counterpart, so a prompt chevron points into
+  the text and brackets face the right way. All 428 pairs come from the Unicode
+  Character Database.
+- **Direction-aware arrow keys.** On a mirrored row the horizontal arrows follow
+  the text, including word-wise (alt) and line-wise (cmd) movement, which are
+  keybindings rather than encoded keys. Pane-focus shortcuts are deliberately
+  left alone, since panes follow the physical screen. Latin rows behave exactly
+  as before.
+- **Twelve Hebrew faces**, selectable from Settings > Terminal and applied
+  without a restart: Noto Sans Hebrew, Miriam Libre, Alef, Heebo, Assistant, IBM
+  Plex Sans Hebrew, Rubik, Varela Round, Frank Ruhl Libre, David Libre, Secular
+  One and Cousine.
+- **Cmd+Z** undoes the last edit on the line being typed.
+
+### Notes
+- A terminal gives every Hebrew letter one cell, and every Hebrew face measured
+  varies 18-25% in advance width across the alphabet, which reads as broken
+  spacing. Each bundled face is therefore normalised to a uniform 0.600em
+  advance by `scripts/make-hebrew-font.py`, so choosing one changes letterforms
+  only and never the grid. Combining marks keep their zero advance.
+- Cmd+Z sends readline's undo, so it undoes an edit on the current line. It
+  cannot un-run a submitted command and does not affect terminal output.
+- Cmd+Z is a ghostty keybind and is not yet remappable from Settings.
+
+
 ## [0.64.20] - 2026-07-19
 
 ### Added

Packages/macOS/CmuxSettings/Sources/CmuxSettings/Keys/TerminalCatalogSection.swift

@@ -37,6 +37,13 @@ public struct TerminalCatalogSection: SettingCatalogSection {
         userDefaultsKey: "terminal.showScrollBar"
     )
 
+    /// Hebrew fallback face for the terminal.
+    public let hebrewFont = DefaultsKey<HebrewFontFace>(
+        id: HebrewFontFace.settingsPath,
+        defaultValue: HebrewFontFace.defaultFace,
+        userDefaultsKey: HebrewFontFace.settingsPath
+    )
+
     public let copyOnSelect = DefaultsKey<Bool>(
         id: "terminal.copyOnSelect",
         defaultValue: false,

Packages/macOS/CmuxSettings/Sources/CmuxSettings/Values/HebrewFontFace.swift

@@ -0,0 +1,63 @@
+import Foundation
+
+/// Hebrew fallback face used by the terminal (Ivrix).
+///
+/// Every option is the same source family put through
+/// `scripts/make-hebrew-font.py`: subset to Hebrew and normalised to a uniform
+/// 0.600em advance matching the Latin cell. Switching therefore changes
+/// letterforms only, never the terminal grid.
+public enum HebrewFontFace: String, CaseIterable, Sendable, SettingCodable {
+    case noto
+    case miriam
+    case alef
+    case heebo
+    case assistant
+    case plex
+    case rubik
+    case varela
+    case frankRuhl
+    case david
+    case secular
+    case cousine
+
+    public static let defaultFace: HebrewFontFace = .noto
+
+    /// Settings path and `UserDefaults` key for the selected face.
+    public static let settingsPath = "terminal.hebrewFont"
+
+    /// Bundled family name, as written into the font's name table.
+    public var familyName: String {
+        switch self {
+        case .noto: return "Ivrix He Noto"
+        case .miriam: return "Ivrix He Miriam"
+        case .alef: return "Ivrix He Alef"
+        case .heebo: return "Ivrix He Heebo"
+        case .assistant: return "Ivrix He Assistant"
+        case .plex: return "Ivrix He Plex"
+        case .rubik: return "Ivrix He Rubik"
+        case .varela: return "Ivrix He Varela"
+        case .frankRuhl: return "Ivrix He FrankRuhl"
+        case .david: return "Ivrix He David"
+        case .secular: return "Ivrix He Secular"
+        case .cousine: return "Ivrix He Cousine"
+        }
+    }
+
+    /// Upstream face name. Proper nouns, so these are not localized.
+    public var displayName: String {
+        switch self {
+        case .noto: return "Noto Sans Hebrew"
+        case .miriam: return "Miriam Libre"
+        case .alef: return "Alef"
+        case .heebo: return "Heebo"
+        case .assistant: return "Assistant"
+        case .plex: return "IBM Plex Sans Hebrew"
+        case .rubik: return "Rubik"
+        case .varela: return "Varela Round"
+        case .frankRuhl: return "Frank Ruhl Libre"
+        case .david: return "David Libre"
+        case .secular: return "Secular One"
+        case .cousine: return "Cousine"
+        }
+    }
+}

Packages/macOS/CmuxSettingsUI/Sources/CmuxSettingsUI/Sections/TerminalSection.swift

@@ -23,6 +23,7 @@ public struct TerminalSection: View {
     @State private var sessionContentAlignment: DefaultsValueModel<SessionContentAlignment>
     @State private var scrollBar: DefaultsValueModel<Bool>
     @State private var copyOnSelect: DefaultsValueModel<Bool>
+    @State private var hebrewFont: DefaultsValueModel<HebrewFontFace>
     @State private var autoResume: DefaultsValueModel<Bool>
     @State private var hibernation: DefaultsValueModel<Bool>
     @State private var idleSeconds: DefaultsValueModel<Double>
@@ -49,6 +50,7 @@ public struct TerminalSection: View {
         _sessionContentAlignment = State(initialValue: DefaultsValueModel(store: defaultsStore, key: catalog.terminal.sessionContentAlignment))
         _scrollBar = State(initialValue: DefaultsValueModel(store: defaultsStore, key: catalog.terminal.showScrollBar))
         _copyOnSelect = State(initialValue: DefaultsValueModel(store: defaultsStore, key: catalog.terminal.copyOnSelect))
+        _hebrewFont = State(initialValue: DefaultsValueModel(store: defaultsStore, key: catalog.terminal.hebrewFont))
         _autoResume = State(initialValue: DefaultsValueModel(store: defaultsStore, key: catalog.terminal.autoResumeAgentSessions))
         _hibernation = State(initialValue: DefaultsValueModel(store: defaultsStore, key: catalog.terminal.agentHibernationEnabled))
         _idleSeconds = State(initialValue: DefaultsValueModel(store: defaultsStore, key: catalog.terminal.agentHibernationIdleSeconds))
@@ -77,6 +79,7 @@ public struct TerminalSection: View {
             sessionContentAlignment,
             scrollBar,
             copyOnSelect,
+            hebrewFont,
             autoResume,
             hibernation,
             idleSeconds,
@@ -310,6 +313,32 @@ public struct TerminalSection: View {
                 .accessibilityIdentifier("SettingsSessionContentAlignmentPicker")
             }
             SettingsCardDivider()
+            SettingsCardRow(
+                configurationReview: .json(HebrewFontFace.settingsPath),
+                String(localized: "settings.terminal.hebrewFont", defaultValue: "Hebrew Font"),
+                subtitle: String(
+                    localized: "settings.terminal.hebrewFont.subtitle",
+                    defaultValue: "Face used for Hebrew text. Every option is normalised to the Latin cell width, so this changes letterforms only."
+                ),
+                controlWidth: 250
+            ) {
+                Picker(
+                    "",
+                    selection: Binding(
+                        get: { hebrewFont.current },
+                        set: { hebrewFont.set($0) }
+                    )
+                ) {
+                    ForEach(HebrewFontFace.allCases, id: \.self) { face in
+                        Text(face.displayName).tag(face)
+                    }
+                }
+                .labelsHidden()
+                .pickerStyle(.menu)
+                .frame(width: 210)
+                .accessibilityIdentifier("SettingsHebrewFontPicker")
+            }
+            SettingsCardDivider()
             SettingsCardRow(
                 configurationReview: .json("terminal.scrollSpeed"),
                 String(localized: "settings.terminal.scrollSpeed", defaultValue: "Scroll Speed"),

README.md

@@ -1,28 +1,79 @@
-<h1 align="center">cmux</h1>
-<p align="center">A Ghostty-based macOS terminal with vertical tabs and notifications for AI coding agents</p>
+<h1 align="center">Ivrix</h1>
+<p align="center"><strong>A macOS terminal that actually gets Hebrew right.</strong></p>
+<p align="center">Real right-to-left (RTL) and bidirectional (BiDi) text support, built on <a href="https://ghostty.org">Ghostty</a>.<br/>
+A fork of <a href="https://github.com/manaflow-ai/cmux">cmux</a>.</p>
+
+<p align="center" dir="rtl"><strong>מסוף (טרמינל) ל־macOS עם תמיכה אמיתית בעברית ובכתיבה מימין לשמאל</strong></p>
 
 <p align="center">
-  <a href="https://github.com/manaflow-ai/cmux/releases/latest/download/cmux-macos.dmg">
-    <img src="./docs/assets/macos-badge.png" alt="Download cmux for macOS" width="180" />
+  <a href="https://github.com/DananzMolt/Ivrix/releases/latest">
+    <img src="./docs/assets/macos-badge.png" alt="Download Ivrix for macOS" width="180" />
   </a>
 </p>
 
 <p align="center">
-  English | <a href="README.ja.md">日本語</a> | <a href="README.vi.md">Tiếng Việt</a> | <a href="README.zh-CN.md">简体中文</a> | <a href="README.zh-TW.md">繁體中文</a> | <a href="README.ko.md">한국어</a> | <a href="README.de.md">Deutsch</a> | <a href="README.es.md">Español</a> | <a href="README.fr.md">Français</a> | <a href="README.it.md">Italiano</a> | <a href="README.da.md">Dansk</a> | <a href="README.pl.md">Polski</a> | <a href="README.ru.md">Русский</a> | <a href="README.bs.md">Bosanski</a> | <a href="README.ar.md">العربية</a> | <a href="README.no.md">Norsk</a> | <a href="README.pt-BR.md">Português (Brasil)</a> | <a href="README.th.md">ไทย</a> | <a href="README.tr.md">Türkçe</a> | <a href="README.km.md">ភាសាខ្មែរ</a> | <a href="README.uk.md">Українська</a>
+  <a href="https://github.com/DananzMolt/Ivrix/releases/latest"><img src="https://img.shields.io/github/v/release/DananzMolt/Ivrix?label=release&color=4c71f2" alt="Latest release" /></a>
+  <img src="https://img.shields.io/badge/macOS-universal-555?logo=apple" alt="macOS universal" />
+  <img src="https://img.shields.io/badge/notarized-Apple-555?logo=apple" alt="Notarized by Apple" />
 </p>
 
-<p align="center">
-  <a href="https://x.com/manaflowai"><img src="https://img.shields.io/badge/@manaflow-555?logo=x" alt="X / Twitter" /></a>
-  <a href="https://discord.gg/xsgFEVrWCZ"><img src="https://img.shields.io/badge/Discord-555?logo=discord" alt="Discord" /></a>
-  <a href="https://github.com/manaflow-ai/cmux"><img src="https://img.shields.io/github/stars/manaflow-ai/cmux?style=flat&logo=github&label=stars&color=4c71f2" alt="GitHub stars" /></a>
-</p>
+## Why Ivrix
+
+Terminal emulators are built left-to-right. Hebrew and Arabic mostly "work" in the
+sense that the characters appear, but the moment you actually edit a line the
+illusion breaks: the cursor lands somewhere else, arrow keys move the wrong way,
+and the prompt arrow points away from your text.
+
+Ivrix fixes that layer properly, following the Unicode bidirectional algorithm
+([UAX #9](https://unicode.org/reports/tr9/)):
+
+- **Right-to-left rendering.** Hebrew lines are mirrored and right-anchored. The
+  direction is resolved **per line**, so English lines are untouched and mixed
+  Hebrew/English content behaves correctly in both.
+- **RTL/LTR toggle** in the titlebar, applied to open terminals without a restart.
+- **A cursor that follows the text.** Placed by visual position, so it sits beside
+  the Hebrew it belongs to instead of stranded at the left edge.
+- **Mirrored glyphs (UAX #9 rule L4).** On a Hebrew line the prompt chevron points
+  into the text and brackets face the right way. All 428 mirror pairs come from the
+  Unicode Character Database.
+- **Direction-aware arrow keys.** On a Hebrew line the arrows follow the text,
+  including word-wise (⌥) and line-wise (⌘) movement. On English lines they behave
+  exactly as always.
+- **Twelve Hebrew fonts** built in, switchable live from *Settings → Terminal →
+  Hebrew Font*.
+
+### Hebrew fonts that fit the grid
+
+A terminal gives every Hebrew letter exactly one cell, and every Hebrew typeface we
+measured varies **18–25%** in advance width across the alphabet. Dropping one in
+as-is leaves ragged gaps between letters. Every bundled face is normalised to a
+uniform cell width, so switching changes letterforms only and never the grid.
+Nikud keep zero width and stack on the letter instead of taking a cell of their own.
+
+Included: Noto Sans Hebrew (default), Miriam Libre, Alef, Heebo, Assistant, IBM Plex
+Sans Hebrew, Rubik, Varela Round, Frank Ruhl Libre, David Libre, Secular One and
+Cousine.
+
+## Install
+
+[**Download the latest release**](https://github.com/DananzMolt/Ivrix/releases/latest),
+open the DMG and drag Ivrix to Applications.
+
+Signed and notarized by Apple, so it opens without a Gatekeeper warning. Universal
+binary — Apple Silicon and Intel.
+
+## Everything else, from cmux
+
+Ivrix is a fork of [cmux](https://github.com/manaflow-ai/cmux) and inherits all of
+it: vertical tabs, notification rings for AI coding agents, splits, workspaces, the
+browser pane and the CLI. The upstream feature tour follows below.
 
 <p align="center">
-  <img src="./docs/assets/main-first-image.png" alt="cmux screenshot" width="900" />
+  English | <a href="README.ja.md">日本語</a> | <a href="README.vi.md">Tiếng Việt</a> | <a href="README.zh-CN.md">简体中文</a> | <a href="README.zh-TW.md">繁體中文</a> | <a href="README.ko.md">한국어</a> | <a href="README.de.md">Deutsch</a> | <a href="README.es.md">Español</a> | <a href="README.fr.md">Français</a> | <a href="README.it.md">Italiano</a> | <a href="README.da.md">Dansk</a> | <a href="README.pl.md">Polski</a> | <a href="README.ru.md">Русский</a> | <a href="README.bs.md">Bosanski</a> | <a href="README.ar.md">العربية</a> | <a href="README.no.md">Norsk</a> | <a href="README.pt-BR.md">Português (Brasil)</a> | <a href="README.th.md">ไทย</a> | <a href="README.tr.md">Türkçe</a> | <a href="README.km.md">ភាសាខ្មែរ</a> | <a href="README.uk.md">Українська</a>
 </p>
 
 <p align="center">
-  <a href="https://www.youtube.com/watch?v=i-WxO5YUTOs">▶ Demo video</a> · <a href="https://cmux.com/blog/zen-of-cmux">The Zen of cmux</a>
+  <img src="./docs/assets/main-first-image.png" alt="Ivrix screenshot" width="900" />
 </p>
 
 ## Features
@@ -93,7 +144,11 @@ Sidebar shows git branch, linked PR status/number, working directory, listening
 - **Keyboard shortcuts** — [Extensive shortcuts](https://cmux.com/docs/keyboard-shortcuts) for workspaces, splits, browser, and more
 - **Open source** — Free and GPL-licensed
 
-## Install
+## Installing upstream cmux
+
+The links in this section install **cmux**, not Ivrix. For Ivrix, use the
+[Ivrix release](https://github.com/DananzMolt/Ivrix/releases/latest) linked at the
+top of this page.
 
 ### DMG (recommended)
 
@@ -445,3 +500,19 @@ for portions for which Manaflow controls the necessary rights. They do not
 relicense third-party material or outside contributions for which Manaflow
 lacks a separate grant. See [LICENSE](LICENSE) for the exact scope and contact
 [founders@manaflow.com](mailto:founders@manaflow.com) for details.
+
+---
+
+## About
+
+**Ivrix** is a Hebrew terminal for macOS: a right-to-left (RTL) terminal emulator with
+full bidirectional text (BiDi) support, Hebrew fonts, and a bidi-aware cursor and
+keyboard navigation. It is a fork of [cmux](https://github.com/manaflow-ai/cmux),
+which is built on [Ghostty](https://ghostty.org).
+
+If you searched for a Hebrew terminal, an RTL terminal for Mac, Hebrew support in
+iTerm/Terminal.app/Ghostty, or  תמיכה בעברית בטרמינל  — this is what Ivrix is for.
+
+Upstream cmux is by [manaflow-ai](https://github.com/manaflow-ai/cmux); Ghostty is by
+[Mitchell Hashimoto](https://ghostty.org). Bundled Hebrew fonts ship under the SIL
+Open Font License with their original attribution.