60-Day Lookup Window in Crosspost Script Triggered Endless Duplicate Slack Alerts
A developer's automated script for crossposting articles to dev.to was generating hundreds of duplicate Slack warnings due to a flawed 60-day sliding window for fetching published articles. Posts older than 60 days would fall outside the lookup window, causing the script to attempt recreating them and receive 422 duplicate errors from dev.to on every CI run. A scheduling feature called publishAfter compounded the issue by bypassing the 30-day local filter, feeding old posts back into the broken loop repeatedly. An auto-update function meant to fix stale dates instead triggered fresh CI runs with each git commit, further amplifying the spam. The fix was straightforward: removing the time-based window entirely and replacing it with full paginated fetching of all published articles.
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