docs: summarize hero achievement naming patterns

.codex/skills/th1-achievement-design/SKILL.md

@@ -42,6 +42,35 @@ Use the existing first four empire style as the baseline:
 - Avoid three names that all say the same thing with different nouns, such as three geographic labels.
 - Avoid opaque proper nouns unless the name still has rhythm or the surrounding set clearly supports it.
 
+## Hero Achievement Naming
+
+Use this section for `Achievement.asset` rows with `BigID: 2`.
+
+- `BigID: 2` is the hero achievement group.
+- `SmallID` matches the last two digits of `LibraryGiantData.AchivePreId`.
+- Hero achievement tiers usually use `InternalID` 1/2/3 with `TrainGiantCondition.TargetCount` 10/20/30.
+- Every hero achievement name should encode a fun anecdote, memorable historical episode, touching story, quote, or character-specific joke. A plain identity label is weak unless the label itself carries a known story.
+- The best names fuse the Touhou character and the historical prototype into one hook, so the player can infer both sides after reading the library entry.
+- Before proposing a name, write the hidden one-sentence story in your notes. If no story can be stated, keep searching.
+- Prefer variety inside one hero set: one accessible character hook, one historical anecdote, and one fused or emotionally stronger capstone.
+- If a prototype name is ambiguous, choose and record the interpretation. For example, `沃尔夫斯坦` can point to Wulfstan II/Lupus for sermon and law-code hooks, or Wulfstan of Hedeby for travel hooks; do not mix both silently.
+
+First four empire baseline:
+
+| Empire | Heroes And Prototypes | Existing Story-Hook Pattern |
+| --- | --- | --- |
+| Egyptian / Scarlet | Remilia-Osiris, Patchouli-Cleopatra, Sakuya-Anubis, Flandre-Set, Meiling-Horus | Mansion jokes and Egyptian myth form a family tragedy arc: blood court, library/asthma, loyal afterlife guide, Set killing Osiris, Horus revenge. |
+| French / Eientei | Kaguya-Napoleon, Eirin-Berthier, Tewi-Richelieu, Reisen-Lannes, Mokou-Bernadotte | Napoleon and marshal anecdotes are recast as Eientei comedy: Hundred Days plus five impossible requests, staff-route prescriptions, indulgence/luck scams, Arcole/Aspern blood and moon rabbits, Bernadotte's northern crown as phoenix rebirth. |
+| Germany / Moriya | Kanako-Frederick II, Suwako-Queen Louise, Sanae-Bismarck, Aya-Clausewitz, Momiji-Teutonic Grand Master | Prussian/German statecraft is rewritten as Moriya faith-business satire: Miracle of Brandenburg, Sanssouci/Onbashira, potato king, Tilsit/Queen Louise, Blood and Iron, Realpolitik, Kulturkampf, fog of war/news, Northern Crusade, Tannenberg. |
+| Indian / Komeiji | Satori-Rama, Koishi-Krishna, Orin-Arjuna, Utsuho-Karna, Yuugi-Indra | Epic and religious stories are moved underground: Ayodhya/exile, Krishna flute and Bhagavad Gita, Arjuna's Gandiva and Brihannala disguise, Karna's curse and wheel in mud, Indra/Vritra and the thousand-eye punishment. |
+
+Use the existing first four empire rows as a baseline, but raise future hero naming toward explicit anecdote quality:
+
+- A direct Touhou title such as `不动的大图书馆`, `完美潇洒的从者`, or `铁血风祝` works best when paired with the other two tiers carrying stronger historical stories.
+- A historical noun phrase such as `奥西里斯之死`, `守矢王室的奇迹`, or `被诅咒的苏利耶之子` should point to a specific event, not only a mythology keyword.
+- A joke name such as `这剂量没问题月球人都在吃`, `捏造也是新闻的一部分`, or `阿空记不住真言` is valid when it clearly reveals the character's voice and a prototype anecdote.
+- A capstone should feel like the strongest remembered story: death, exile, miracle, betrayal, redemption, last loyalty, famous quote, or irreversible historical turn.
+
 ## Historical Hook Quality
 
 Prefer hooks in this order: