Windows Recovery for Truncation Crash Loops

Use this guide if Antigravity or a Jetski/Cortex-based integration on Windows gets stuck in a restart loop with an error like:

TrajectoryChatConverter: could not convert a single message before hitting truncation

This usually means a previous run stored a broken trajectory or tried to load too many skill instructions into one message.

When to use this guide

Antigravity crashes immediately after launch on Windows
the app keeps resuming the same broken session
a newly installed skill or bundle caused the failure
you already removed the offending skill but the app still reopens into the same error

Safety first

Before deleting anything, back up these folders if they exist:

%USERPROFILE%\.gemini\antigravity-browser-profile\Default
%AppData%\antigravity
%USERPROFILE%\.gemini\antigravity

If you installed skills into a different location, also back up that custom directory.

Manual recovery steps

Fully close Antigravity.
Remove the offending skill or package from your Antigravity skill install. Default path:
```
%USERPROFILE%\.gemini\antigravity\plugins\skills
```

Delete the stored browser database folders if they exist:

%USERPROFILE%\.gemini\antigravity-browser-profile\Default\Local Storage
%USERPROFILE%\.gemini\antigravity-browser-profile\Default\Session Storage
%USERPROFILE%\.gemini\antigravity-browser-profile\Default\IndexedDB

Delete the Antigravity app storage folders if they exist:

%AppData%\antigravity\Local Storage
%AppData%\antigravity\Session Storage

Clear your Windows temp directory:
```
%TEMP%
```
Restart Antigravity.
Reinstall only the skills you actually need, or switch your integration to lazy loading with explicit limits.

Recommended prevention

Do not concatenate every SKILL.md into one system prompt.
Use data/skills_index.json as a lightweight manifest.
Load SKILL.md files only when a skill is actually requested.
Set explicit limits for skills per turn.
Prefer overflowBehavior: "error" in the reference Jetski/Gemini loader so the host fails clearly instead of silently overfilling the context window.

See:

Optional Windows batch helper

The following script is adapted from the community recovery workflow shared by @DiggaX in issue #274. Review it before running it.

@echo off
setlocal enabledelayedexpansion
title Anti-Gravity_Recovery_Tool_Universal

set "TIMESTAMP=%date:~6,4%-%date:~3,2%-%date:~0,2%_%time:~0,2%-%time:~3,2%"
set "TIMESTAMP=%TIMESTAMP: =0%"
set "BACKUP_DIR=%USERPROFILE%\Desktop\AG_Emergency_Backup_%TIMESTAMP%"

set "PATH_BROWSER=%USERPROFILE%\.gemini\antigravity-browser-profile\Default"
set "PATH_APPCONFIG=%AppData%\antigravity"
set "PATH_MAIN=%USERPROFILE%\.gemini\antigravity"

echo ============================================================
echo      ANTI-GRAVITY RECOVERY ^& REPAIR TOOL (UNIVERSAL)
echo ============================================================
echo.
echo This tool targets the truncation crash loop on Windows.
echo [INFO] Backup location: %BACKUP_DIR%
echo.

if not exist "%BACKUP_DIR%" mkdir "%BACKUP_DIR%"

if exist "%PATH_BROWSER%" xcopy "%PATH_BROWSER%" "%BACKUP_DIR%\Browser_Profile" /E /I /Y /Q
if exist "%PATH_APPCONFIG%" xcopy "%PATH_APPCONFIG%" "%BACKUP_DIR%\App_Config" /E /I /Y /Q
if exist "%PATH_MAIN%" xcopy "%PATH_MAIN%" "%BACKUP_DIR%\Main_Skills" /E /I /Y /Q

(
echo === ANTI-GRAVITY RESTORATION GUIDE ===
echo.
echo Restore Browser_Profile to: %PATH_BROWSER%
echo Restore App_Config to: %PATH_APPCONFIG%
echo Restore Main_Skills to: %PATH_MAIN%
echo.
echo Close Antigravity before restoring.
) > "%BACKUP_DIR%\RECOVERY_INSTRUCTIONS.txt"

set /p "repair=Start the repair now? [Y/N]: "

if /i "%repair%"=="Y" (
    if exist "%PATH_BROWSER%\Local Storage" rd /s /q "%PATH_BROWSER%\Local Storage"
    if exist "%PATH_BROWSER%\Session Storage" rd /s /q "%PATH_BROWSER%\Session Storage"
    if exist "%PATH_BROWSER%\IndexedDB" rd /s /q "%PATH_BROWSER%\IndexedDB"
    if exist "%PATH_APPCONFIG%\Local Storage" rd /s /q "%PATH_APPCONFIG%\Local Storage"
    if exist "%PATH_APPCONFIG%\Session Storage" rd /s /q "%PATH_APPCONFIG%\Session Storage"
    del /q /s %temp%\* >nul 2>&1
    for /d %%x in (%temp%\*) do @rd /s /q "%%x" >nul 2>&1
    echo [SUCCESS] Recovery cleanup completed.
) else (
    echo Recovery skipped. No files were deleted.
)

echo.
echo Next step: remove the broken skill from %PATH_MAIN%\plugins\skills
pause

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