The voice: every game speaks in its own world

Conventions gain a section on in-game language: an image with every
fact, the fact exact, unfolding effects told a turn at a time and naming
the turn they end on, our own words rather than an older version's, and
chronicle wording shipped without a rules revision. new-game.sh points
at it, and the demo game's lines follow it. Born in Waving Hands'
atmospheric chronicle.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0141G6xqLeNRYEtviLWSB5Up

CONVENTIONS.md

@@ -158,6 +158,29 @@ emoji in the interface; the words do the work. Phone width first: a sticky
 bar for the move if the board runs long, lists that shorten, gutters of
 16px, no horizontal scroll.
 
+## The voice
+
+Every game speaks in its own world. Wherever the page tells a player what
+happened, it gives an image as well as the fact: not "Corwin takes 5 from
+a fireball" but "A fireball bursts over Corwin, for 5". The fact stays
+exact and whole (the number, the duration, who is affected, the turn a
+thing will happen), and the image carries it.
+
+- **The chronicle** is where the voice matters most. Each move, blow,
+  enchantment, arrival and death gets its own picture. Something that
+  unfolds over turns (an illness, a siege, a fuse) is told a turn at a
+  time, names the turn it ends on when it begins, and warns on the last
+  turn anything can be done about it.
+- **The rest of the surround** speaks the same way: the lobby, the guide,
+  the status lines, the verdict. Plain words for controls and buttons;
+  the images belong to what happens, not to what you press.
+- **Our own words.** An older implementation's prose is a guide to the
+  tone, never a source to copy.
+- **Changing text is not changing rules.** Chronicle wording is not part
+  of the ledger, so it ships without a rules revision; the deploy gate
+  compares outcomes, not sentences. A test that pins a phrase should pin
+  the fact inside it.
+
 ## Things learned the hard way
 
 - Caddy's `try_files` rewrites `/api` before `reverse_proxy` unless the