TLDR Dev · ARTICLES & TUTORIALS

REPLACING LLM DATE MATH WITH DETERMINISTIC SCRIPTS TO IMPROVE CALENDAR ACCURACY

jessitron.com3 min read

Summary from the TLDR Dev newsletter

LLMs like Claude frequently fail at date math, causing calendar errors in tools like gcalcli. Offloading calculations to deterministic scripts ensures accuracy. Developers can eliminate hallucinations and create reliable, repeatable AI workflows by updating CLAUDE.md instructions to execute code instead of manual reasoning.