DuetCases

Unofficial community site, not affiliated with Anthropic. DuetCases at duetcases.com collects practical, copyable use cases and prompt templates for Claude Duet, Anthropic's research-preview agent. Browsing the public case library is free. This is not an official Anthropic product, invite system, or support channel.
Claude Duet is described by Anthropic as a proactive assistant you can message by text or voice. It uses memory, skills, and connectors already on a Claude account, and it can keep working on a cloud computer after the app is closed. Public help pages say it can prepare a morning brief from email and calendar, check connected accounts through the day, and leave finished files in a Make tab. It is designed to wait for a person's approval before it sends, pays, signs, or deletes. Some actions stay off limits even with approval.
DuetCases groups those public capabilities into short cases: morning briefs, inbox triage, unpaid-invoice reminders, Gusto payroll prep that stops before anyone is paid, LinkedIn job-post drafts, meeting briefs, dashboards and forecasts, small web prototypes, Docusign agreement prep, HubSpot follow-ups, Canva campaign drafts, Shopify store notes, and Calendly scheduling. Each case states the scenario, the limits, and a prompt you can copy. Sixteen pages are workflow cases. A few research pages restate public sources, including Anthropic's own articles and help center, and they are labeled as unofficial summaries rather than audits.
The site is written so a reader can open one case, see what the source actually claims, and copy a prompt that stays inside that claim. It does not grant access to Claude Duet. Anthropic's help center says the research preview is a waitlist for Claude Pro or Max accounts in the United States, with invitations sent in waves. Team and Enterprise plans are not included in that description. DuetCases cannot invite anyone and cannot change those limits.
Named connectors discussed on the site include apps Anthropic has publicly mentioned, such as Gmail, Google Calendar, Slack, QuickBooks, HubSpot, Docusign, Calendly, and others called out in the launch material. Google Drive is named in help pages and does not have its own case. Features described as coming soon, including a richer Shopify editor, are not written up as available.
Who it is for: people who already have, or are waiting for, Claude Duet and want a scenario-based prompt instead of a blank chat. It is also for readers comparing what the agent is actually documented to do versus generic automation claims. Pricing on the public library is free to read. Contact hellovibecoder@proton.me. This is an unofficial community project and is not affiliated with, endorsed by, or maintained by Anthropic. Claude and Claude Duet may be trademarks of Anthropic.