Agents gave design opinions without reading the recorded decisions and
proposed things those decisions had already rejected. The guidance now
lists what to read before the first opinion, and asks the agent to say
what it read and what a proposal would reverse.

Signed-off-by: willbot <w.a.madden+machine@gmail.com>
Signed-off-by: Will Madden <madden@prisma.io>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>