diff --git a/docs/OPEN_ISSUES_FOR_TESTERS.txt b/docs/OPEN_ISSUES_FOR_TESTERS.txt
index 8f7510f..05ce071 100644
--- a/docs/OPEN_ISSUES_FOR_TESTERS.txt
+++ b/docs/OPEN_ISSUES_FOR_TESTERS.txt
@@ -5,8 +5,11 @@
  build. Section A is the payoff -- please verify.
 =============================================================================
  HOW TO REPORT: drop a line in Discord with the issue number and PASS /
- FAIL / what you saw. Screenshots and rough times help; logs get collected
- as usual.
+ FAIL / what you saw. Screenshots and rough times help.
+ LOGS -- NEW, ONE CLICK: double-click SENDLOGS.bat in the game folder after
+ the session. It puts ONE small zip on your Desktop with every log from the
+ night (session logs, matchlogs, launch breadcrumbs) -- attach that one file.
+ No more hunting for the right .log, no more missing parts.
 =============================================================================
 
 -----------------------------------------------------------------------------
diff --git a/game/btl4main.cpp b/game/btl4main.cpp
index 6136192..f4d007e 100644
--- a/game/btl4main.cpp
+++ b/game/btl4main.cpp
@@ -731,29 +731,18 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 						lt = shifted;
 				}
 			}
-			// SIZE ROLL-OVER -- never deletes anything, but keeps each FILE small
-			// enough to actually send.  A playtest evening concatenates into one
-			// file (4.3 MB from a single session in scratchpad/night5/), and the
-			// channel this evidence travels through is a chat attachment.  Part 0
-			// is <stem>_YYYYMMDD.log; once it passes the cap the NEXT launch opens
-			// <stem>_YYYYMMDD.1.log, and so on.  Checked only at open, so one very
-			// long session can still overrun -- that is deliberate: never split a
-			// live session across files.
-			const DWORD part_max = 8UL * 1024UL * 1024UL;
-			for (int part = 0; part < 1000; ++part)
-			{
-				if (part == 0)
-					wsprintfA(resolvedLog, "%s_%04d%02d%02d.log",
-						logStem, (int)lt.wYear, (int)lt.wMonth, (int)lt.wDay);
-				else
-					wsprintfA(resolvedLog, "%s_%04d%02d%02d.%d.log",
-						logStem, (int)lt.wYear, (int)lt.wMonth, (int)lt.wDay, part);
-				WIN32_FILE_ATTRIBUTE_DATA fad;
-				if (!GetFileAttributesExA(resolvedLog, GetFileExInfoStandard, &fad))
-					break;										// does not exist yet -- use it
-				if (fad.nFileSizeHigh == 0 && fad.nFileSizeLow < part_max)
-					break;										// still room to append
-			}
+			// ONE NIGHT = ONE FILE (the 8 MB size roll-over RETIRED 2026-08-13).
+			// The roll existed because the evidence channel is a Discord
+			// attachment (free-tier cap: 10 MB today; 8 MB when this shipped) --
+			// but multi-part files cost us field evidence the moment they
+			// existed: testers attach "the log" (the newest part) and part 0
+			// stays home (night16: Elengil's 20:17 ET incident window was in the
+			// unsent pre-rotation part).  Transport is now SENDLOGS.bat (ships
+			// in the dist root): zips every log/matchlog/lastrun to one ~10:1
+			// compressed attachment, so raw file size no longer matters and the
+			// whole night reads as one uninterrupted file.
+			wsprintfA(resolvedLog, "%s_%04d%02d%02d.log",
+				logStem, (int)lt.wYear, (int)lt.wMonth, (int)lt.wDay);
 			logSelfNamed = 1;
 		}
 	}
diff --git a/players/SENDLOGS.bat b/players/SENDLOGS.bat
new file mode 100644
index 0000000..3e40112
--- /dev/null
+++ b/players/SENDLOGS.bat
@@ -0,0 +1,19 @@
+@echo off
+rem ==========================================================================
+rem  BT411 -- package tonight's logs into ONE Discord-attachable zip.
+rem  Double-click me after a playtest.  The zip lands on your DESKTOP as
+rem  BTLOGS_<machine>_<date>.zip -- attach that one file in Discord.
+rem  Collects: every session log, matchlog, and launch breadcrumb.  Nothing
+rem  is deleted or modified; this only makes a copy.
+rem ==========================================================================
+cd /d "%~dp0"
+powershell -NoProfile -ExecutionPolicy Bypass -Command ^
+  "$d = Get-Date -Format yyyyMMdd_HHmm;" ^
+  "$out = Join-Path ([Environment]::GetFolderPath('Desktop')) (\"BTLOGS_{0}_{1}.zip\" -f $env:COMPUTERNAME, $d);" ^
+  "$files = Get-ChildItem -Path 'content\*.log','content\lastrun_*.txt','content\matchlog_*.txt','content\cdb_*.txt' -ErrorAction SilentlyContinue | Where-Object { $_.LastWriteTime -gt (Get-Date).AddHours(-36) };" ^
+  "if (-not $files) { Write-Host 'No logs found -- run me from the BT411 folder (next to the content directory).'; exit 1 }" ^
+  "Compress-Archive -Force -Path $files.FullName -DestinationPath $out;" ^
+  "Write-Host ('Wrote ' + $out + '  (' + $files.Count + ' files, ' + [math]::Round((Get-Item $out).Length/1MB,1) + ' MB)');"
+echo.
+echo Attach the BTLOGS zip from your Desktop in Discord. Thanks!
+pause
diff --git a/tools/mkdist.py b/tools/mkdist.py
index 8c91ded..23133c9 100644
--- a/tools/mkdist.py
+++ b/tools/mkdist.py
@@ -77,7 +77,7 @@ def main():
     exes = ["build/Release/btl4.exe"]
 
     bats = ["players/play_solo.bat", "players/join.bat", "players/join_lan.bat",
-            "players/joyconfig.bat"]
+            "players/joyconfig.bat", "players/SENDLOGS.bat"]
     if steam_on:
         bats.append("players/play_steam.bat")
     for p in exes + bats: