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The release branch already ships the slim-prompt intent in a stronger form than #3010 — compose_default_static_layers appends no personality overlay at all (voice/tone guidance is folded into the constitution preamble), where the PR only emptied the Calm arm. Carry over the PR's regression test, which derives its assertion from calm.md itself so a future re-inclusion of the overlay text fails loudly. Harvested from PR #3010 by @894876246 Co-authored-by: Hanmiao Li <894876246@qq.com> Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>