agent: proposal cards live in the chat, never 'in your Library'#828
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Live evidence: the agent proposed a canvas update (tool succeeded, card emitted into the thread) but told the host 'The update proposal is ready in your Library.' The host searched the Library, found nothing to apply, and concluded the feature was broken. Proposals are chat cards; the Library holds live canvases. Prompt rule with the observed message as the named counterexample, plus assertions. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Live evidence (Wednesday Check in session): the agent created a real canvas update proposal — the tool succeeded and the card was emitted into the thread — but its message said "The update proposal is ready in your Library. Once you apply it…". The host searched the Library, found no proposal (the Library holds live canvases, not proposals), and reasonably concluded the feature was lying.
One prompt rule with the observed message as the named counterexample: proposal cards appear right here in the chat, below the message — say "review and apply it below", never send the host to the Library for a proposal. Prompt assertions included.
Gates: agent suite 93 passed.
🤖 Generated with Claude Code