Four fixes to prevent agents from reinventing the feedback loop badly:
1. Sequential generate rule: explicit instruction that $D generate calls
must run one at a time (API rate-limits concurrent image generation).
2. No-AskUserQuestion-for-feedback rule: agent reads feedback.json instead
of re-asking what the user picked.
3. Remove file:// references: $B goto file:// was always rejected by
url-validation.ts. The --serve flag handles everything.
4. Remove $B eval polling reference: no longer needed with HTTP POST.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>