How to find your session file

1. Copy your latest session to the desktop

   Open a terminal and run the line for your system. It finds the newest session in any project and copies it as my-session.jsonl.

   cp "$(ls -t ~/.claude/projects/*/*.jsonl | head -1)" ~/Desktop/my-session.jsonl

   Get-ChildItem "$env:USERPROFILE\.claude\projects\*\*.jsonl" | Sort-Object LastWriteTime -Descending | Select-Object -First 1 | Copy-Item -Destination "$env:USERPROFILE\Desktop\my-session.jsonl"

2. Or pick a specific session

   Sessions are in ~/.claude/projects/, one folder per project. The folder is named after the project path with dashes. Each session is one file named with a long id. List them by date to find yours:

   ls -lt ~/.claude/projects/*/*.jsonl | head

   -rw-r--r--  1 anna  staff  2.1M Nov 14 17:42 /Users/anna/.claude/projects/-Users-anna-shop/4f0c2a9e-7d1b-4c1e-9a55-0b6f3e2d8c11.jsonl
   -rw-r--r--  1 anna  staff  640K Nov 13 10:05 /Users/anna/.claude/projects/-Users-anna-shop/b81d77c2-0a4e-4f6b-8d0e-5a2c9e7f1b34.jsonl
   -rw-r--r--  1 anna  staff  1.4M Nov 11 15:20 /Users/anna/.claude/projects/-Users-anna-blog/9c3e51aa-62f0-4b7d-a1c8-7e4d2f6b0a95.jsonl

   In a file dialog these folders are hidden. On a Mac, press Cmd + Shift + G and paste ~/.claude/projects. On Linux, press Ctrl + H. On Windows, paste %USERPROFILE%\.claude\projects into the address bar.

1. Copy your latest session to the desktop

   cp "$(ls -t ~/.codex/sessions/*/*/*/rollout-*.jsonl | head -1)" ~/Desktop/my-session.jsonl

   Get-ChildItem "$env:USERPROFILE\.codex\sessions\*\*\*\rollout-*.jsonl" | Sort-Object LastWriteTime -Descending | Select-Object -First 1 | Copy-Item -Destination "$env:USERPROFILE\Desktop\my-session.jsonl"

2. Or pick a specific session

   Sessions are in ~/.codex/sessions/, in folders by year, month and day. Each session is one file that starts with rollout- and carries its start time in the name.

   If the session started subagents, each subagent has its own rollout file with a later time. Pick the one with the time you started the session.

1. Drop the file on the start page

   Drag my-session.jsonl from the desktop onto the upload area, or click "Choose files". The file name appears under the area. Tick the box and click "Create my report".

   

2. Wait about three minutes

   The page shows the steps and opens the report by itself. Upload one session at a time. Files up to 100 MB work.

Upload a session

The command finds nothing

You may have moved the data folder. If you set CLAUDE_CONFIG_DIR or CODEX_HOME, look there instead.

"Not a Claude Code or Codex session"

The file must be the .jsonl transcript from the folders above. An exported chat or a copied text does not work.

"We could not read this session"

The session has no message that you typed yourself, for example a session started by a script.

Secrets in the session

Keys and passwords we recognize are removed before the model reads anything. If you pasted a secret in a form we might not recognize, pick another session.