docs: add changelog entry for 7 creative writing anchors (#392)

Credits @deehtodd for proposing story structure anchors in #387.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: raifdmueller

docs/changelog.adoc

@@ -2,6 +2,20 @@
 
 A chronological record of all semantic anchors added to the catalog. Community contributors are credited with thanks.
 
+== 2026-03-29
+
+*New category:* `Creative Writing & Storytelling`
+
+*New anchors* (proposed by https://github.com/deehtodd[@deehtodd] in https://github.com/LLM-Coding/Semantic-Anchors/issues/387[#387]):
+
+* *Three-Act Structure* — Aristotle / Syd Field / McKee
+* *Hero's Journey (Monomyth)* — Joseph Campbell / Christopher Vogler
+* *Save the Cat! 15-Beat Sheet* — Blake Snyder
+* *Fichtean Curve* — John Gardner / Janet Burroway
+* *Freytag's Pyramid (Five-Act)* — Gustav Freytag / John Yorke
+* *Story Circle* — Dan Harmon
+* *Kishōtenketsu* — Classical Chinese/Japanese tradition
+
 == 2026-03-26
 
 *New anchors:*