AI Briefing4.7 Rule Regression
Key point
This is a real-usage report that 4.7 violates CLAUDE.md prohibition rules more often than 4.6.
Details
Comparing prohibition rules set in CLAUDE.md for each project, 4.7 showed rule violations more often than 4.6.
Examples:
- Attempted to modify
.envtwice in 18 hours - In a minimal reproduction with a prohibited filename rule, higher rate of creating
something_helper.ts - Also kept ignoring the
git add -Aprohibition rule
When the violation was pointed out, it would fix it at that moment, but a few turns later it would repeat the same prohibited behavior. The author sees this not as a simple benchmark, but as an experience where the actual probability of following operational rules like CLAUDE.md has decreased.
As causes, the possibilities of the model itself, routing changes, and system prompt changes are all mentioned together, but for sensitive projects they have switched back to 4.6, and are using 4.7 only for less critical tasks.
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