Tip: Pre-Output Python Script Injection in System Prompt Claimed to Halve Hallucination Rate
r/ClaudeAI·medium signal
A r/ClaudeAI post (64 upvotes) documents adding a mandatory `python -m pre_output_check` execution step to Claude Code's output style section, forcing a verification script to run before every response including follow-ups. The claimed result is approximately 50% reduction in hallucinations on code tasks. Requires adding the pre-output block to system prompt with 'NO EXCEPTIONS' enforcement language.