diff --git a/doc/README.md b/doc/README.md
index b6c9d94..5718b43 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -232,6 +232,34 @@ so, it doesn't seem like there's a particular flag that identifies maiden races,
 - card_talent_upgrade has costs to increase potential level, but it doesn't seem to have skill sets
 - card_talent_hint_upgrade has costs to raise hint levels, but it's actually universal, only six rows
 - single_mode_route_race is career goals (not only races)
+- available_skill_set has starting skills including those unlocked by potential level given under need_rank (0 for pl1, 2 for pl2)
+
+# lobby conversations!!!
+
+table is home_story_trigger.
+
+pos_id values:
+- 110 right side, toward the front
+- 120 same, but two characters
+- 130 same, but three characters
+- 210 left side table
+- 220
+- 310 center back seat
+- 410 center posters
+- 420
+- 430
+- 510 left school map
+- 520
+- 530
+
+num is how many characters are involved, but also can just check chara_id_{1,2,3} for nonzero.
+
+unsure what condition_type is.
+values of 2 and 3 always have two or three characters, and values of 4 (jp only) always have three, but 0 and 1 can have any number.
+
+gallery_chara_id is the character whose conversation it is; chara_id_{1,2,3} are the characters involved.
+gallery_chara_id is always one of the three, but it can be any one of the three.
+disp_order then is the conversation number within their gallery.
 
 # update diffs
 
diff --git a/horse/game-id.kk b/horse/game-id.kk
index 5d3f969..e9dc98f 100644
--- a/horse/game-id.kk
+++ b/horse/game-id.kk
@@ -17,7 +17,7 @@ pub struct character-id
 
 // Game ID for trainees, i.e. costume instances of characters.
 // Generally a character ID with two digits appended.
-pub struct trainee-id
+pub struct uma-id
   game-id: game-id
 
 // Game ID for skills.
diff --git a/horse/trainee.kk b/horse/trainee.kk
deleted file mode 100644
index 4691c06..0000000
--- a/horse/trainee.kk
+++ /dev/null
@@ -1,18 +0,0 @@
-module horse/trainee
-
-import horse/game-id
-import horse/movement
-import horse/race
-
-// Details of a trainee.
-pub struct trainee-detail
-  turf: level
-  dirt: level
-  sprint: level
-  mile: level
-  medium: level
-  long: level
-  front-runner: level
-  pace-chaser: level
-  late-surger: level
-  end-closer: level