Commit message body repeatedly wraps at 72 chars despite explicit 100-char instruction

When asked to generate commit messages, Claude wraps body lines at ~72 characters even after being told (via memory/feedback) to wrap at 100. The rule is read and acknowledged each session, but the output still hard-wraps at the training default. This has been corrected multiple times across multiple sessions without sticking.

Expected: body lines wrap at 100 chars as instructed
Actual: body lines wrap at ~72 chars (training default)