Quoting Steve Yegge

Simon Willison's Weblog · 3 weeks ago · 7

Steve Yegge described how Gas Town, a reusable system he built, failed when Anthropic's Opus 4.7 introduced a problematic behavior pattern where the model constantly wanted to revise itself rather than converge on a working state. The critical breaking point occurred with version 4.7's release, which Yegge characterized as the final cause of Gas Town's collapse. This failure illustrates challenges in building stable systems dependent on specific LLM behavior patterns and version compatibility.