Write a checkpoint for [PROJECT] from the work actually completed in this session. Include goal, agreed scope, current source locations, actual output files, latest versions, completed IDs, blockers, checks run with results, unrun checks, and next action.
Do not reconstruct progress from memory when the tracker or files disagree; identify the discrepancy. Do not include credentials or unnecessary personal data. Keep the checkpoint useful for someone with no chat history.
If [AUTHORIZED DESTINATION] is writable with current tools, save the note and verify it can be read back. Otherwise provide its full text here and state that it was not saved externally. Do not claim a future session automatically has access to these files.