docs(skills): repoint world-building off Duncarrow (specimen + cosmology); rewrite evals

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HuHRPE7VfppUJEaoGBEUqZ

.claude/skills/world-building/SKILL.md

@@ -97,8 +97,9 @@ contradict, and it carries the authoring rules that keep the war in tone
 
 - **Bible entries:** see `references/schema.md` for the full field-by-field
   contract, the id/namespace/type rules, the secrecy scale, and the knowledge-gate
-  model. Match the voice and structure of `content/lore/duncarrow.md` — it is the
-  reference specimen.
+  model. Match the **structure** of `content/lore/specimen.md` (the synthetic
+  disposition-gate specimen — a guarded-then-warm NPC with one earned reveal) and
+  the **voice** of the canon bodies in `content/lore/cosmology.md`.
 - **Hand-authored JSON:** mirror the shape of the existing file in that folder
   (`references/schema.md` documents each). Keep ids stable and lowercase-snake.