diff --git a/apps/lightcraft-web/src/web.rs b/apps/lightcraft-web/src/web.rs
index 9960fdd54..2ba868c48 100644
--- a/apps/lightcraft-web/src/web.rs
+++ b/apps/lightcraft-web/src/web.rs
@@ -213,6 +213,8 @@ fn services(originals: Originals, backend: Option<Backend>, files: Files, frozen
         // Face models need a folder to live in; the web has none.
         pick_model_file: None,
         save_preset_file: None,
+        pick_keyword_list: None,
+        save_keyword_list: None,
         pick_curve_preset_files: None,
         save_curve_preset_file: None,
         write: Some(Box::new(download)),
diff --git a/apps/lightcraft/src/main.rs b/apps/lightcraft/src/main.rs
index 832b158b3..da3373848 100644
--- a/apps/lightcraft/src/main.rs
+++ b/apps/lightcraft/src/main.rs
@@ -472,6 +472,22 @@ fn services(ctx: egui::Context, log_file: Option<&std::path::Path>) -> Services
                 .save_file()
                 .map(|p| p.to_string_lossy().to_string())
         })),
+        pick_keyword_list: Some(Box::new(|| {
+            rfd::FileDialog::new()
+                .set_title(lightcraft_ui_egui::i18n::tr("Import Keywords"))
+                .add_filter_nocase(lightcraft_ui_egui::i18n::tr("Keyword Lists"), &["txt", "utf8"])
+                .pick_file()
+                .map(|p| vec![p.to_string_lossy().to_string()])
+                .unwrap_or_default()
+        })),
+        save_keyword_list: Some(Box::new(|name: &str| {
+            rfd::FileDialog::new()
+                .set_title(lightcraft_ui_egui::i18n::tr("Export Keywords"))
+                .add_filter_nocase(lightcraft_ui_egui::i18n::tr("Keyword Lists"), &["txt"])
+                .set_file_name(name)
+                .save_file()
+                .map(|p| p.to_string_lossy().to_string())
+        })),
         pick_curve_preset_files: Some(Box::new(|| {
             rfd::FileDialog::new()
                 .set_title(lightcraft_ui_egui::i18n::tr("Import Point Curve Presets"))
diff --git a/crates/ui-egui/locales/de-formats.json b/crates/ui-egui/locales/de-formats.json
index a259b6936..a618b92aa 100644
--- a/crates/ui-egui/locales/de-formats.json
+++ b/crates/ui-egui/locales/de-formats.json
@@ -216,5 +216,9 @@
   "Added “{keyword}” to {n} photo{}": "„{keyword}“ zu {n} Foto{} hinzugefügt",
   "On {have} of {of} selected photos": "Auf {have} von {of} ausgewählten Fotos",
   "Remove “{name}”": "„{name}“ entfernen",
-  "There is a keyword set “{name}” already": "Es gibt bereits einen Stichwortsatz „{name}“"
+  "There is a keyword set “{name}” already": "Es gibt bereits einen Stichwortsatz „{name}“",
+  "Added {n} keyword{}": "{n} Stichwort/Stichwörter hinzugefügt{:.0}",
+  "; {n} gained synonyms": "; {n} erhielten Synonyme",
+  "Exported {n} keyword{}": "{n} Stichwort/Stichwörter exportiert{:.0}",
+  " — Capture One won't import a list with ; , < or > in a keyword: {names}": " — Capture One importiert keine Liste mit ; , < oder > in einem Stichwort: {names}"
 }
diff --git a/crates/ui-egui/locales/de.json b/crates/ui-egui/locales/de.json
index a82080c9e..30fa6f743 100644
--- a/crates/ui-egui/locales/de.json
+++ b/crates/ui-egui/locales/de.json
@@ -1921,5 +1921,10 @@
   "Keywords (⌥1–⌥9)": "Stichwörter (⌥1–⌥9)",
   "A keyword set needs a name": "Ein Stichwortsatz braucht einen Namen",
   "Save as a new set": "Als neuen Satz speichern",
-  "Recent Keywords is built in: choose another name": "„Letzte Stichwörter“ ist vorgegeben: Wählen Sie einen anderen Namen"
+  "Recent Keywords is built in: choose another name": "„Letzte Stichwörter“ ist vorgegeben: Wählen Sie einen anderen Namen",
+  "Import Keywords…": "Stichwörter importieren…",
+  "Export Keywords…": "Stichwörter exportieren…",
+  "Import Keywords": "Stichwörter importieren",
+  "Export Keywords": "Stichwörter exportieren",
+  "Keyword Lists": "Stichwortlisten"
 }
diff --git a/crates/ui-egui/locales/es-formats.json b/crates/ui-egui/locales/es-formats.json
index 04f321003..e4af9a0a4 100644
--- a/crates/ui-egui/locales/es-formats.json
+++ b/crates/ui-egui/locales/es-formats.json
@@ -216,5 +216,9 @@
   "Added “{keyword}” to {n} photo{}": "Se añadió “{keyword}” a {n} foto{}",
   "On {have} of {of} selected photos": "En {have} de {of} fotos seleccionadas",
   "Remove “{name}”": "Quitar “{name}”",
-  "There is a keyword set “{name}” already": "Ya hay un conjunto de palabras clave “{name}”"
+  "There is a keyword set “{name}” already": "Ya hay un conjunto de palabras clave “{name}”",
+  "Added {n} keyword{}": "Se añadieron {n} palabra{} clave",
+  "; {n} gained synonyms": "; {n} recibieron sinónimos",
+  "Exported {n} keyword{}": "Se exportaron {n} palabra{} clave",
+  " — Capture One won't import a list with ; , < or > in a keyword: {names}": " — Capture One no importa una lista con ; , < o > en una palabra clave: {names}"
 }
diff --git a/crates/ui-egui/locales/es.json b/crates/ui-egui/locales/es.json
index 7be7d02c2..173d4fbac 100644
--- a/crates/ui-egui/locales/es.json
+++ b/crates/ui-egui/locales/es.json
@@ -1766,5 +1766,10 @@
   "Keywords (⌥1–⌥9)": "Palabras clave (⌥1–⌥9)",
   "A keyword set needs a name": "Un conjunto de palabras clave necesita un nombre",
   "Save as a new set": "Guardar como conjunto nuevo",
-  "Recent Keywords is built in: choose another name": "“Palabras clave recientes” es fijo: elige otro nombre"
+  "Recent Keywords is built in: choose another name": "“Palabras clave recientes” es fijo: elige otro nombre",
+  "Import Keywords…": "Importar palabras clave…",
+  "Export Keywords…": "Exportar palabras clave…",
+  "Import Keywords": "Importar palabras clave",
+  "Export Keywords": "Exportar palabras clave",
+  "Keyword Lists": "Listas de palabras clave"
 }
diff --git a/crates/ui-egui/locales/ja-formats.json b/crates/ui-egui/locales/ja-formats.json
index cadc6834f..f28f8025e 100644
--- a/crates/ui-egui/locales/ja-formats.json
+++ b/crates/ui-egui/locales/ja-formats.json
@@ -216,5 +216,9 @@
   "Added “{keyword}” to {n} photo{}": "写真{n}枚に「{keyword}」を追加しました{:.0}",
   "On {have} of {of} selected photos": "選択した写真{of}枚のうち{have}枚",
   "Remove “{name}”": "「{name}」を削除",
-  "There is a keyword set “{name}” already": "キーワードセット「{name}」はすでにあります"
+  "There is a keyword set “{name}” already": "キーワードセット「{name}」はすでにあります",
+  "Added {n} keyword{}": "{n}件のキーワードを追加しました{:.0}",
+  "; {n} gained synonyms": "。{n}件に同義語を追加",
+  "Exported {n} keyword{}": "{n}件のキーワードを書き出しました{:.0}",
+  " — Capture One won't import a list with ; , < or > in a keyword: {names}": " — Capture One は ; , < > を含むキーワードがあるリストを読み込みません: {names}"
 }
diff --git a/crates/ui-egui/locales/ja.json b/crates/ui-egui/locales/ja.json
index 3c9a6cf5a..392a58318 100644
--- a/crates/ui-egui/locales/ja.json
+++ b/crates/ui-egui/locales/ja.json
@@ -1766,5 +1766,10 @@
   "Keywords (⌥1–⌥9)": "キーワード (⌥1–⌥9)",
   "A keyword set needs a name": "キーワードセットには名前が必要です",
   "Save as a new set": "新しいセットとして保存",
-  "Recent Keywords is built in: choose another name": "「最近使用したキーワード」は組み込みです。別の名前を選んでください"
+  "Recent Keywords is built in: choose another name": "「最近使用したキーワード」は組み込みです。別の名前を選んでください",
+  "Import Keywords…": "キーワードを読み込み…",
+  "Export Keywords…": "キーワードを書き出し…",
+  "Import Keywords": "キーワードを読み込み",
+  "Export Keywords": "キーワードを書き出し",
+  "Keyword Lists": "キーワードリスト"
 }
diff --git a/crates/ui-egui/locales/pt-br-formats.json b/crates/ui-egui/locales/pt-br-formats.json
index f0bbcb2c8..9caa5832c 100644
--- a/crates/ui-egui/locales/pt-br-formats.json
+++ b/crates/ui-egui/locales/pt-br-formats.json
@@ -216,5 +216,9 @@
   "Added “{keyword}” to {n} photo{}": "“{keyword}” adicionada a {n} foto{}",
   "On {have} of {of} selected photos": "Em {have} de {of} fotos selecionadas",
   "Remove “{name}”": "Remover “{name}”",
-  "There is a keyword set “{name}” already": "Já existe um conjunto de palavras-chave “{name}”"
+  "There is a keyword set “{name}” already": "Já existe um conjunto de palavras-chave “{name}”",
+  "Added {n} keyword{}": "Palavras-chave adicionadas: {n}{:.0}",
+  "; {n} gained synonyms": "; {n} receberam sinônimos",
+  "Exported {n} keyword{}": "Palavras-chave exportadas: {n}{:.0}",
+  " — Capture One won't import a list with ; , < or > in a keyword: {names}": " — O Capture One não importa uma lista com ; , < ou > em uma palavra-chave: {names}"
 }
diff --git a/crates/ui-egui/locales/pt-br.json b/crates/ui-egui/locales/pt-br.json
index e2c3f5827..169460ecc 100644
--- a/crates/ui-egui/locales/pt-br.json
+++ b/crates/ui-egui/locales/pt-br.json
@@ -1766,5 +1766,10 @@
   "Keywords (⌥1–⌥9)": "Palavras-chave (⌥1–⌥9)",
   "A keyword set needs a name": "Um conjunto de palavras-chave precisa de um nome",
   "Save as a new set": "Salvar como novo conjunto",
-  "Recent Keywords is built in: choose another name": "“Palavras-chave recentes” é fixo: escolha outro nome"
+  "Recent Keywords is built in: choose another name": "“Palavras-chave recentes” é fixo: escolha outro nome",
+  "Import Keywords…": "Importar palavras-chave…",
+  "Export Keywords…": "Exportar palavras-chave…",
+  "Import Keywords": "Importar palavras-chave",
+  "Export Keywords": "Exportar palavras-chave",
+  "Keyword Lists": "Listas de palavras-chave"
 }
diff --git a/crates/ui-egui/locales/ru-formats.json b/crates/ui-egui/locales/ru-formats.json
index 66f9cfd55..9857ebe8c 100644
--- a/crates/ui-egui/locales/ru-formats.json
+++ b/crates/ui-egui/locales/ru-formats.json
@@ -216,5 +216,9 @@
   "Added “{keyword}” to {n} photo{}": "«{keyword}» добавлено к фото ({n}){:.0}",
   "On {have} of {of} selected photos": "На {have} из {of} выбранных фото",
   "Remove “{name}”": "Убрать «{name}»",
-  "There is a keyword set “{name}” already": "Набор ключевых слов «{name}» уже есть"
+  "There is a keyword set “{name}” already": "Набор ключевых слов «{name}» уже есть",
+  "Added {n} keyword{}": "Добавлено ключевых слов: {n}{:.0}",
+  "; {n} gained synonyms": "; синонимы добавлены к {n}",
+  "Exported {n} keyword{}": "Экспортировано ключевых слов: {n}{:.0}",
+  " — Capture One won't import a list with ; , < or > in a keyword: {names}": " — Capture One не импортирует список, где в ключевом слове есть ; , < или >: {names}"
 }
diff --git a/crates/ui-egui/locales/ru.json b/crates/ui-egui/locales/ru.json
index 40cae6c3b..e60981012 100644
--- a/crates/ui-egui/locales/ru.json
+++ b/crates/ui-egui/locales/ru.json
@@ -1442,5 +1442,10 @@
   "Set name": "Название набора",
   "Save as a new set": "Сохранить как новый набор",
   "Recent Keywords is built in: choose another name": "«Недавние ключевые слова» — встроенный набор: выберите другое название",
-  "Recent Keywords": "Недавние ключевые слова"
+  "Recent Keywords": "Недавние ключевые слова",
+  "Import Keywords…": "Импорт ключевых слов…",
+  "Export Keywords…": "Экспорт ключевых слов…",
+  "Import Keywords": "Импорт ключевых слов",
+  "Export Keywords": "Экспорт ключевых слов",
+  "Keyword Lists": "Списки ключевых слов"
 }
diff --git a/crates/ui-egui/locales/zh-hans-formats.json b/crates/ui-egui/locales/zh-hans-formats.json
index b329eef6c..ed682c803 100644
--- a/crates/ui-egui/locales/zh-hans-formats.json
+++ b/crates/ui-egui/locales/zh-hans-formats.json
@@ -216,5 +216,9 @@
   "Added “{keyword}” to {n} photo{}": "已将“{keyword}”添加到 {n} 张照片{:.0}",
   "On {have} of {of} selected photos": "所选 {of} 张照片中的 {have} 张",
   "Remove “{name}”": "移除“{name}”",
-  "There is a keyword set “{name}” already": "已有关键字集“{name}”"
+  "There is a keyword set “{name}” already": "已有关键字集“{name}”",
+  "Added {n} keyword{}": "已添加 {n} 个关键字{:.0}",
+  "; {n} gained synonyms": "；{n} 个获得了同义词",
+  "Exported {n} keyword{}": "已导出 {n} 个关键字{:.0}",
+  " — Capture One won't import a list with ; , < or > in a keyword: {names}": " — Capture One 不会导入关键字中含有 ; , < 或 > 的列表：{names}"
 }
diff --git a/crates/ui-egui/locales/zh-hans.json b/crates/ui-egui/locales/zh-hans.json
index 2726ff589..095f27d78 100644
--- a/crates/ui-egui/locales/zh-hans.json
+++ b/crates/ui-egui/locales/zh-hans.json
@@ -1766,5 +1766,10 @@
   "Keywords (⌥1–⌥9)": "关键字 (⌥1–⌥9)",
   "A keyword set needs a name": "关键字集需要名称",
   "Save as a new set": "另存为新关键字集",
-  "Recent Keywords is built in: choose another name": "“最近使用的关键字”为内置集：请另选名称"
+  "Recent Keywords is built in: choose another name": "“最近使用的关键字”为内置集：请另选名称",
+  "Import Keywords…": "导入关键字…",
+  "Export Keywords…": "导出关键字…",
+  "Import Keywords": "导入关键字",
+  "Export Keywords": "导出关键字",
+  "Keyword Lists": "关键字列表"
 }
diff --git a/crates/ui-egui/locales/zh-hant-formats.json b/crates/ui-egui/locales/zh-hant-formats.json
index ba8462202..07b04a79c 100644
--- a/crates/ui-egui/locales/zh-hant-formats.json
+++ b/crates/ui-egui/locales/zh-hant-formats.json
@@ -216,5 +216,9 @@
   "Added “{keyword}” to {n} photo{}": "已將「{keyword}」加入 {n} 張照片{:.0}",
   "On {have} of {of} selected photos": "選取的 {of} 張照片中的 {have} 張",
   "Remove “{name}”": "移除「{name}」",
-  "There is a keyword set “{name}” already": "已有關鍵字集「{name}」"
+  "There is a keyword set “{name}” already": "已有關鍵字集「{name}」",
+  "Added {n} keyword{}": "已加入 {n} 個關鍵字{:.0}",
+  "; {n} gained synonyms": "；{n} 個獲得了同義詞",
+  "Exported {n} keyword{}": "已匯出 {n} 個關鍵字{:.0}",
+  " — Capture One won't import a list with ; , < or > in a keyword: {names}": " — Capture One 不會匯入關鍵字中含有 ; , < 或 > 的清單：{names}"
 }
diff --git a/crates/ui-egui/locales/zh-hant.json b/crates/ui-egui/locales/zh-hant.json
index b0c8d19be..e38564f23 100644
--- a/crates/ui-egui/locales/zh-hant.json
+++ b/crates/ui-egui/locales/zh-hant.json
@@ -1766,5 +1766,10 @@
   "Keywords (⌥1–⌥9)": "關鍵字 (⌥1–⌥9)",
   "A keyword set needs a name": "關鍵字集需要名稱",
   "Save as a new set": "另存為新關鍵字集",
-  "Recent Keywords is built in: choose another name": "「最近使用的關鍵字」為內建集：請另選名稱"
+  "Recent Keywords is built in: choose another name": "「最近使用的關鍵字」為內建集：請另選名稱",
+  "Import Keywords…": "匯入關鍵字…",
+  "Export Keywords…": "匯出關鍵字…",
+  "Import Keywords": "匯入關鍵字",
+  "Export Keywords": "匯出關鍵字",
+  "Keyword Lists": "關鍵字清單"
 }
diff --git a/crates/ui-egui/src/lib.rs b/crates/ui-egui/src/lib.rs
index dfaff2c6a..27dd89155 100644
--- a/crates/ui-egui/src/lib.rs
+++ b/crates/ui-egui/src/lib.rs
@@ -42,6 +42,8 @@ mod tests_grid;
 #[cfg(test)]
 mod tests_keymap;
 #[cfg(test)]
+mod tests_keyword_files;
+#[cfg(test)]
 mod tests_keyword_list;
 #[cfg(test)]
 mod tests_keyword_set;
@@ -124,6 +126,10 @@ pub struct Services {
     pub pick_tracklog: Option<PickFiles>,
     /// Save dialog for an exported `.lcpreset` file.
     pub save_preset_file: Option<SaveFile>,
+    /// Open dialog for a keyword list file (`.txt`, Photo Supreme's `.utf8`; File ▸ Import Keywords…).
+    pub pick_keyword_list: Option<PickFiles>,
+    /// Save dialog for an exported keyword list (File ▸ Export Keywords…).
+    pub save_keyword_list: Option<SaveFile>,
     /// Open dialog for point-curve preset files (`.lccurve`).
     pub pick_curve_preset_files: Option<PickFiles>,
     /// Save dialog for an exported `.lccurve` file.
diff --git a/crates/ui-egui/src/menubar.rs b/crates/ui-egui/src/menubar.rs
index 7d964856e..34c83048f 100644
--- a/crates/ui-egui/src/menubar.rs
+++ b/crates/ui-egui/src/menubar.rs
@@ -77,6 +77,8 @@ const LAYOUT: &[(&str, &[&str])] = &[
             "---",
             "file.importPresets",
             "file.exportPresets",
+            "file.importKeywords",
+            "file.exportKeywords",
             "---",
             "dialog.export",
             "app.exportPrevious",
diff --git a/crates/ui-egui/src/menus.rs b/crates/ui-egui/src/menus.rs
index 73e62d383..9f3a3918f 100644
--- a/crates/ui-egui/src/menus.rs
+++ b/crates/ui-egui/src/menus.rs
@@ -164,6 +164,8 @@ pub const UI_COMMANDS: &[UiCommand] = &[
     ("app.quit", "Quit LightCraft", Some("Cmd+Q"), "File"),
     ("file.importPresets", "Import Profiles & Presets…", None, "File"),
     ("file.exportPresets", "Export Presets…", None, "File"),
+    ("file.importKeywords", "Import Keywords…", None, "File"),
+    ("file.exportKeywords", "Export Keywords…", None, "File"),
     // Edit panel ▸ Curve ▸ Point Curve dropdown
     ("file.importCurvePresets", "Import Point Curve Presets…", None, ""),
     ("file.exportCurvePresets", "Export Point Curve Presets…", None, ""),
@@ -1346,6 +1348,68 @@ pub fn run_ui_command(app: &mut LightcraftApp, id: &str, p: &Value) -> Option<Re
             }
             return Some(r);
         }
+        "file.importKeywords" => {
+            // a keyword list file: Lightroom Classic's, Capture One's, Photo Supreme's (.utf8)
+            let path = match p.get("path").and_then(Value::as_str) {
+                Some(x) => x.to_string(),
+                None => {
+                    let req = PickRequest::file(crate::i18n::tr("Import Keywords"), crate::i18n::tr("Keyword Lists"), &["txt", "utf8"]);
+                    match crate::pick::ask(app, id, p, "path", req, |s| s.pick_keyword_list.as_mut().map(|f| f())) {
+                        Picked::Now(v) => match v.into_iter().next() {
+                            Some(x) => x,
+                            None => return Some(Ok(Value::Null)),
+                        },
+                        Picked::Later => return Some(Ok(Value::Null)),
+                        Picked::Unavailable => return Some(Err("no file dialog on this platform".into())),
+                    }
+                }
+            };
+            let r = app.session.execute("keyword.import", &json!({"path": path})).map_err(|e| e.to_string());
+            match &r {
+                Ok(v) => {
+                    let (added, updated) = (v["added"].as_u64().unwrap_or(0), v["updated"].as_u64().unwrap_or(0));
+                    let mut msg = crate::i18n::tr_format!("Added {n} keyword{}", if added == 1 { "" } else { "s" }, n = added);
+                    if updated > 0 {
+                        msg.push_str(&crate::i18n::tr_format!("; {n} gained synonyms", n = updated));
+                    }
+                    app.toast(&ctx, msg);
+                }
+                Err(e) => app.toast(&ctx, e.clone()),
+            }
+            return Some(r);
+        }
+        "file.exportKeywords" => {
+            let path = match p.get("path").and_then(Value::as_str) {
+                Some(x) => x.to_string(),
+                None => {
+                    let name = "Keywords.txt";
+                    let req = PickRequest::save(crate::i18n::tr("Export Keywords"), crate::i18n::tr("Keyword Lists"), &["txt"], name);
+                    match crate::pick::ask(app, id, p, "path", req, |s| s.save_keyword_list.as_mut().map(|f| f(name).into_iter().collect())) {
+                        Picked::Now(v) => match v.into_iter().next() {
+                            Some(x) => x,
+                            None => return Some(Ok(Value::Null)),
+                        },
+                        Picked::Later => return Some(Ok(Value::Null)),
+                        Picked::Unavailable => return Some(Err("no file dialog on this platform".into())),
+                    }
+                }
+            };
+            let r = app.session.execute("keyword.export", &json!({"path": path})).map_err(|e| e.to_string());
+            if let Ok(v) = &r {
+                let n = v["keywords"].as_u64().unwrap_or(0);
+                let mut msg = crate::i18n::tr_format!("Exported {n} keyword{}", if n == 1 { "" } else { "s" }, n = n);
+                // Capture One's importer refuses ; , < > in a list: say which to rename first
+                let refuses: Vec<&str> = v["captureOneRefuses"].as_array().into_iter().flatten().filter_map(Value::as_str).collect();
+                if !refuses.is_empty() {
+                    msg.push_str(&crate::i18n::tr_format!(
+                        " — Capture One won't import a list with ; , < or > in a keyword: {names}",
+                        names = refuses.iter().take(5).copied().collect::<Vec<_>>().join(" · ")
+                    ));
+                }
+                app.toast(&ctx, msg);
+            }
+            return Some(r);
+        }
         "file.exportPresets" => {
             let group = p.get("group").and_then(Value::as_str).map(str::to_string);
             let path = match p.get("path").and_then(Value::as_str) {
diff --git a/crates/ui-egui/src/panels/keyword_list.rs b/crates/ui-egui/src/panels/keyword_list.rs
index e315d1bda..b670010ea 100644
--- a/crates/ui-egui/src/panels/keyword_list.rs
+++ b/crates/ui-egui/src/panels/keyword_list.rs
@@ -605,6 +605,8 @@ mod tests {
             "Recent Keywords",
             "Keywords (⌥1–⌥9)",
             "Save as a new set",
+            "Import Keywords…",
+            "Export Keywords…",
         ];
         let dir = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("locales");
         for code in ["de", "es", "pt-br", "ru", "ja", "zh-hans", "zh-hant"] {
diff --git a/crates/ui-egui/src/tests_keyword_files.rs b/crates/ui-egui/src/tests_keyword_files.rs
new file mode 100644
index 000000000..3eeed518b
--- /dev/null
+++ b/crates/ui-egui/src/tests_keyword_files.rs
@@ -0,0 +1,76 @@
+//! File ▸ Import Keywords… / Export Keywords…: keyword list files (Lightroom Classic's format,
+//! which Capture One and Photo Supreme read and write too).
+
+use std::time::Duration;
+
+use serde_json::json;
+
+use crate::headless::Headless;
+use crate::{LightcraftApp, Services};
+
+const T: Duration = Duration::from_secs(20);
+const SETTLE: Duration = Duration::from_secs(120);
+
+fn app() -> Headless {
+    let app = LightcraftApp::new(lightcraft_engine::Session::with_demo(), Services { png: None, ..Default::default() });
+    let mut h = Headless::new(app, [1200.0, 800.0], 1.0);
+    h.settle(SETTLE);
+    h
+}
+
+fn temp_dir(tag: &str) -> std::path::PathBuf {
+    let d = std::env::temp_dir().join(format!("lc-ui-keyword-files-{tag}-{}", std::process::id()));
+    let _ = std::fs::remove_dir_all(&d);
+    std::fs::create_dir_all(&d).unwrap();
+    d
+}
+
+fn run(h: &mut Headless, command: &str, params: serde_json::Value) -> serde_json::Value {
+    let r = h.request("engine.execute", json!({"command": command, "params": params}), T);
+    h.settle(SETTLE);
+    r
+}
+
+fn toast(h: &Headless) -> String {
+    h.app.ui.toast.clone().map(|t| t.0).unwrap_or_default()
+}
+
+/// The File menu offers Import Keywords… and Export Keywords….
+#[test]
+fn the_file_menu_offers_keyword_files() {
+    let mut h = app();
+    let r = h.request("ui.menu.list", json!({}), T);
+    let items = r["result"].to_string();
+    for id in ["file.importKeywords", "file.exportKeywords"] {
+        assert!(items.contains(id), "{id}");
+    }
+}
+
+/// Import Keywords… reads a list and says how many keywords it added.
+#[test]
+fn importing_keywords_says_what_it_added() {
+    let dir = temp_dir("import");
+    let mut h = app();
+    let path = dir.join("vocabulary.utf8");
+    std::fs::write(&path, "[Places]\r\n\tPortugal\r\n\t\tLisbon\r\n").unwrap();
+    let r = run(&mut h, "file.importKeywords", json!({"path": path.to_string_lossy()}));
+    assert_eq!(r["ok"], true, "{r}");
+    assert!(h.app.session.catalog.has_keyword("Places|Portugal|Lisbon"));
+    assert!(toast(&h).contains("3"), "{}", toast(&h));
+    let _ = std::fs::remove_dir_all(&dir);
+}
+
+/// Export Keywords… writes the list, and warns about the keywords Capture One won't import.
+#[test]
+fn exporting_keywords_warns_about_capture_one() {
+    let dir = temp_dir("export");
+    let mut h = app();
+    let id = h.app.session.visible_cloned()[0].0;
+    run(&mut h, "photo.setMeta", json!({"ids": [id], "addKeywords": ["fish, chips"]}));
+    let path = dir.join("keywords.txt");
+    let r = run(&mut h, "file.exportKeywords", json!({"path": path.to_string_lossy()}));
+    assert_eq!(r["ok"], true, "{r}");
+    assert!(std::fs::read_to_string(&path).unwrap().contains("fish, chips"));
+    assert!(toast(&h).contains("Capture One"), "{}", toast(&h));
+    let _ = std::fs::remove_dir_all(&dir);
+}