How Claude Fable Helped Ship a Safer Open-Source Library — and What the $149 Price Tag Reveals About AI-Assisted Development
Reading Time: 5 minutesSimon Willison used Claude Fable in Claude Code to catch a critical data-loss bug and ship sqlite-utils 4.0rc2 across 37 prompts and 34 commits, at an estimated API cost of $149.25 (≈ ₹12,686). The case reveals how AI code review, cross-model validation, and subagent workflows are becoming practical — and expensive — tools in modern software development.