feat(extras): add history + culture domains from corpus mining

engine/crates/lex-cli/src/dict_source/extras.rs

@@ -38,6 +38,8 @@ const DOMAINS: &[(&str, &str)] = &[
     ("it.tsv", include_str!("extras/it.tsv")),
     ("food.tsv", include_str!("extras/food.tsv")),
     ("geography.tsv", include_str!("extras/geography.tsv")),
+    ("history.tsv", include_str!("extras/history.tsv")),
+    ("culture.tsv", include_str!("extras/culture.tsv")),
 ];
 
 /// Default cost for entries that don't specify one. Mid-range so curated
@@ -147,6 +149,19 @@ mod tests {
             .expect("きららざか must map to 雲母坂");
         assert!(kirarazaka.iter().any(|e| e.surface == "雲母坂"));
 
+        // history domain
+        let eiroku = entries.get("えいろく").expect("えいろく must map to 永禄");
+        assert!(eiroku.iter().any(|e| e.surface == "永禄"));
+        // Cost override on a history entry (寛保 cost=7000) must round-trip.
+        let kanpou = entries.get("かんぽう").expect("かんぽう must map to 寛保");
+        assert!(kanpou.iter().any(|e| e.surface == "寛保" && e.cost == 7000));
+
+        // culture domain
+        let komuro = entries
+            .get("こむろてつや")
+            .expect("こむろてつや must map to 小室哲哉");
+        assert!(komuro.iter().any(|e| e.surface == "小室哲哉"));
+
         // All entries use the default POS id.
         for entry_list in entries.values() {
             for entry in entry_list {

engine/crates/lex-cli/src/dict_source/extras/culture.tsv

@@ -0,0 +1,35 @@
+# Lexime curated extras: culture & media vocabulary (publishers, music
+# producers/artists, popular culture) not covered by Mozc UT.
+#
+# Format: reading[TAB]surface[TAB]cost(optional)
+# Comment lines start with '#'. See it.tsv for full format spec.
+#
+# Sourcing: surfaces below were sampled from `dictool candidates corpus`
+# output on a Japanese Wikipedia dump and verified via `lextool explain`
+# to ensure each entry fills a real Mozc gap (top-1 was gibberish or an
+# obscure homophone) rather than duplicating an existing dict entry.
+
+# --- 出版社・文庫 ---
+しんちょうぶんこ	新潮文庫
+ちゅうこうぶんこ	中公文庫
+ちゅうおうこうろんしんしゃ	中央公論新社
+とうきょうだいがくしゅっぱんかい	東京大学出版会
+せいぶんどうしんこうしゃ	誠文堂新光社
+こうぶんどう	弘文堂
+かどかわにほんちめいだいじてん	角川日本地名大辞典
+こくしだいじてん	国史大辞典
+
+# --- 作詞家・作曲家・アーティスト ---
+こむろてつや	小室哲哉
+あきもとやすし	秋元康
+まつとうやゆみ	松任谷由実
+あむろなみえ	安室奈美恵
+さわだけんじ	沢田研二
+つつみきょうへい	筒美京平
+まつもとたかし	松本隆
+みずきなな	水樹奈々
+# 阿久悠: 悪友 (final_cost ~11800) を top-1 に残すため cost を上げる
+あくゆう	阿久悠	8000
+
+# --- 作品名 ---
+うちゅうせんかん	宇宙戦艦

engine/crates/lex-cli/src/dict_source/extras/history.tsv

@@ -0,0 +1,38 @@
+# Lexime curated extras: historical vocabulary (era names, court ranks,
+# classical works, historical figures and organizations) not covered by
+# Mozc UT.
+#
+# Format: reading[TAB]surface[TAB]cost(optional)
+# Comment lines start with '#'. See it.tsv for full format spec.
+#
+# Sourcing: surfaces below were sampled from `dictool candidates corpus`
+# output on a Japanese Wikipedia dump and verified via `lextool explain`
+# to ensure each entry fills a real Mozc gap (top-1 was gibberish or an
+# obscure homophone) rather than duplicating an existing dict entry.
+
+# --- 元号 (戦国〜江戸) ---
+えいろく	永禄
+じょうがん	貞観
+ほうれき	宝暦
+げんき	元亀
+えんきょう	延享
+きょうろく	享禄
+# 寛保: 漢方 (final_cost ~10500) を top-1 に残すため cost を上げる
+かんぽう	寛保	7000
+
+# --- 位階 ---
+じゅごい	従五位
+じゅさんみ	従三位
+しょうごい	正五位
+しょうしい	正四位
+
+# --- 古典・古書 ---
+しょくにほんぎ	続日本紀
+かんせいちょうしゅうしょかふ	寛政重修諸家譜
+せんしそうしょ	戦史叢書
+
+# --- 歴史人物・国家 ---
+ぶてい	武帝
+ほくぎ	北魏
+# 曹操: 早々 (final_cost ~10600) を top-1 に残すため cost を上げる
+そうそう	曹操	8000

engine/testcorpus/accuracy-corpus.toml

@@ -496,6 +496,99 @@ expected = "雲母坂"
 category = "extras"
 tags = ["geography", "domain-reading"]
 
+# --- history: 元号 / 位階 / 古典 / 歴史人物 ---
+# Mozc UT に surface 自体が無く、lattice top-1 が gibberish になる ----
+
+[[cases]]
+reading = "えいろく"
+expected = "永禄"
+category = "extras"
+tags = ["history", "era"]
+note = "Mozc top-1 は 栄禄 (obscure)。Wikipedia corpus mining で発見"
+
+[[cases]]
+reading = "じゅごい"
+expected = "従五位"
+category = "extras"
+tags = ["history", "court-rank"]
+
+[[cases]]
+reading = "しょくにほんぎ"
+expected = "続日本紀"
+category = "extras"
+tags = ["history", "classical-work"]
+
+[[cases]]
+reading = "せんしそうしょ"
+expected = "戦史叢書"
+category = "extras"
+tags = ["history", "classical-work"]
+note = "Mozc top-1 は 戦士叢書 (同音異字)"
+
+[[cases]]
+reading = "ほくぎ"
+expected = "北魏"
+category = "extras"
+tags = ["history", "dynasty"]
+
+# 共存ケース: extras に追加した surface が Mozc top-1 を上書きしないこと
+# (寛保/元亀/曹操 を入れたが、常用語の 漢方/元気/早々 が top-1 を維持)
+
+[[cases]]
+reading = "かんぽう"
+expected = "漢方"
+category = "extras"
+tags = ["history", "era", "cost-conflict"]
+note = "extras に 寛保 を追加したが、常用の 漢方 が top-1 を維持 (cost 7000 で調整)"
+
+[[cases]]
+reading = "げんき"
+expected = "元気"
+category = "extras"
+tags = ["history", "era", "cost-conflict"]
+note = "extras に 元亀 を追加したが、常用の 元気 が top-1 を維持 (default cost で OK)"
+
+[[cases]]
+reading = "そうそう"
+expected = "早々"
+category = "extras"
+tags = ["history", "person", "cost-conflict"]
+note = "extras に 曹操 を追加したが、常用の 早々 が top-1 を維持 (cost 8000 で調整)"
+
+# --- culture: 出版社 / 音楽人 / 作品名 ---
+
+[[cases]]
+reading = "しんちょうぶんこ"
+expected = "新潮文庫"
+category = "extras"
+tags = ["culture", "publisher"]
+
+[[cases]]
+reading = "かどかわにほんちめいだいじてん"
+expected = "角川日本地名大辞典"
+category = "extras"
+tags = ["culture", "publisher"]
+
+[[cases]]
+reading = "こむろてつや"
+expected = "小室哲哉"
+category = "extras"
+tags = ["culture", "person"]
+
+[[cases]]
+reading = "うちゅうせんかん"
+expected = "宇宙戦艦"
+category = "extras"
+tags = ["culture", "work"]
+note = "Mozc top-1 は 宇宙船感 (gibberish)"
+
+[[cases]]
+reading = "あくゆう"
+expected = "悪友"
+category = "extras"
+tags = ["culture", "person", "cost-conflict"]
+note = "extras に 阿久悠 を追加したが、常用の 悪友 が top-1 を維持 (cost 8000 で調整)"
+
 # ═══════════════════════════════════════════════════════════════════
 # Compound nouns (segmentation + POS)
 # ═══════════════════════════════════════════════════════════════════