tasks/date-string-sort-pitfall/instruction.md

Task: Repair The Log Timeline Sorter

The files for this task are under /root/task.

The operations team needs the server logs in chronological order, but the current sorter in /root/task/process_logs.py is still using the export-facing date representation too directly.

What you should do:

1. Fix the existing sorting logic so /root/task/server_logs.csv is ordered oldest first.
2. Keep the output complete and save the sorted rows to /root/task/output.json.
3. Preserve all rows and keep the sort grounded in actual dates, not display strings.

Please update the code in /root/task in place.

Required Output Schema

Write /root/task/output.json as a JSON object with:

• row_count (integer): number of log rows retained.
• first_date (string): display date of the first sorted record.
• last_date (string): display date of the last sorted record.
• records (array of objects): all log records in chronological order, preserving the original record fields.

Design contract: parse M/D/YYYY and MM/DD/YYYY strings as dates before sorting. Sort by parsed date, then time, then log_id for deterministic ties using a stable sort such as pandas kind="mergesort". Do not sort directly on the raw date string.