Improve command discovery and welcome messages

README.md

@@ -462,7 +462,9 @@ Records use the same service area, right aligned: `Map Record | Round N`,
 followed by every tied holder on a separate line. After a blank row,
 `Your Best | Round N` uses the same heading style as the map record, distinct
 from the holder names. The entire announcement is visible at once for 12 seconds;
-records have no pages, counter or footer. Help pauses a visible record and
+records have no pages, counter or footer. The initial `Type .help for commands`
+hint uses the same private native message area and style as unknown-command
+replies. Help pauses a visible record and
 resumes its remaining time when help ends. `.leaders` during help replaces the
 pending record with a fresh replay. Round-start reminders use just the record
 header and one proximity or milestone line for six seconds. They skip busy
@@ -486,7 +488,7 @@ avoiding dynamic counter strings in the text config-string pool. Numeric HP
 still uses `SetValue`. On r5334+, deploy the updated HUD script and restart
 the map; no full server-process restart is required. On older Plutonium
 revisions, update clients and server and fully restart them before deploying.
-Leaderboard `1.3.1` requires matching common `1.6.1+` for personal records
+Leaderboard `1.4.1` requires matching common `1.7.0+` for personal records
 and round-start reminders.
 AFK `2.0.0` requires plugin `1.4.0+`,
 common `1.4.0+` and the EC reserve service; see the [AFK guide](docs/afk.md). Existing
@@ -547,10 +549,37 @@ Before rollout, validate both engines in Plutonium:
    notifications and other installed HUD mods; portable allocation checks do
    not establish live T5 SP rendering capacity.
 
+## Chat command discovery (T5 and T6)
+
+Common `1.7.0` replies privately to unknown messages starting with `.` or `!`:
+`Unknown command. Type .help for the list`. It compares the first word with
+installed modules' registered commands, so `.w 2000` and `.afk buy 10` are
+recognized without changing their existing argument handling. Ordinary chat
+gets no fallback reply. Bang commands are recognized only if registered with `!`.
+
+`.info` and `.command` are case-insensitive aliases for `.help`; `.commands`
+continues to work. Leaderboard `1.4.1` adds `.record` as an alias for `.leaders`.
+Aliases use the same exact-message handling as their original commands and
+add no duplicate help rows. Without the enabled leaderboard module, `.record`
+and `.leaders` receive the unknown-command reply.
+
+On welcome, `Type .help for commands` appears once through the same private
+`iPrintLn` message area and style as unknown-command replies, after readiness
+and the five-second welcome delay. It does not wait for record data, occupy a
+record HUD row, or repeat on manual replay. Install matching common `1.7.1` and
+leaderboard `1.4.1` scripts together and restart the map. There is
+no new native-plugin or backend dependency and no full process restart needed.
+
+Run `node tools/check_commands.mjs`, `node tools/check_hud.mjs` and
+`node tools/check_leaderboard.mjs` for portable command and display checks.
+Live chat/privacy and rendering checks are in the
+[T5 module checks](t5/scripts/README.md#tws_t5_commongsc) and
+[T6 notes](t6/scripts/NOTES.md#checks).
+
 ## Map record announcements
 
 Install `tws_t5_leaderboard.gsc` for T5 or `tws_t6_leaderboard.gsc` for T6,
-**along with common `1.6.1+`** for that game when using leaderboard `1.3.1`.
+**along with common `1.7.0+`** for that game when using leaderboard `1.4.1`.
 Copy both scripts for each installed game and restart the map. This update
 adds no native-plugin or backend requirement and needs no full server-process
 restart when existing leaderboard dependencies are already installed.