Building in public means owning your mistakes. On June 10, a minor optimization to our core instructions parser caused our live support agent to run into a prompt-formatting loop, hallucinating gibberish links on our home page.
What Happened
We updated our system prompt parsing package to resolve nested variable tags in template strings. However, a edge case in template formatting caused variables to render as undefined, corrupting the prompt system instructions. The agent fallback defaulted to general instructions, causing it to hallucinate mock answers for help center requests.
The 4-Hour Fix
Within ten minutes of user bug reports, we halted the automated prompt sync. We deployed hotfixes to roll back template parsing dependencies to the previous stable release.
To prevent future instruction issues, we built our Playground Compare Mode. Developers can now run multiple model parameters and prompt versions side by side in a safe testing sandbox before saving edits to production.