I asked Fable to “review our code” on a long-running GitHub project, and I made the mistake of not defining the review scope. It appears to have treated that as a broad audit of the project history rather than “review the current code at HEAD” or “review the current PR diff.” It spun up dozens of audit/review passes at once, and my entire 5-hour + flex usage range was gone in seconds before I even had time to realize what was happening and stop it. Clearly, that’s partly on me for being too vague. But since Anthropic subscribers currently have a 5-day window to try the Fable model, I figured this was worth flagging for anyone planning to use it for code review. Start with something like: Review only the current files at HEAD. Do not review git history, old commits, old branches, archived files, or previous versions. Only report issues that exist in the current code. Or, for a PR: Review only the diff between this branch and main. Hopefully this saves someone else from burning their whole balance on an accidental full-history audit. submitted by /u/jessestormer
Originally posted by u/jessestormer on r/ClaudeCode