A game may count its own lines from every game begun, not only those finished

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jm2auWk6RP71CjaAb4FMoG

CONVENTIONS.md

@@ -99,7 +99,8 @@ README.
 - **The tally** sits in the about panel: what the ledgers add up to
   (tables, games begun and finished, names seated, turns, time at the
   table, games with a bot, talk), counted on demand from the files and
-  cached a minute. A game adds its own lines through `GameSpec.tally`.
+  cached a minute. A game adds its own lines through `GameSpec.tally` and
+  `GameSpec.tallyBegun`.
 - **Table options** are the host's choices when opening a table (a
   variant, a side, a length): the game declares them in `GameSpec.options`,
   the hall renders them as selects, the room line records them, and
@@ -157,7 +158,9 @@ if it were never there.
   `botInput` receives the same press, so a bot can keep what was agreed.
   `parting(press, viewer)` gives the bots' last words once the game is
   over. Without `botPress`, private talk to a bot is refused.
-- `tally(state)`: the game's own lines for the tally, from a finished game.
+- `tally(state)`: the game's own lines for the tally, from a finished game;
+  `tallyBegun(options)`: lines from every game begun, finished or not, by
+  its table's options (games begun on each variant).
 - `preferences`, `options`: the preferences panel's settings and the
   host's table choices (above).