When a cron job's delivery target resolution fails (resolvedDelivery.ok
is false), the agent was still started with requireExplicitMessageTarget:
true. This caused "Action send requires a target" errors because the
agent's message tool demanded a target that was never resolved.
Condition the flag on both deliveryRequested AND resolvedDelivery.ok so
the agent can still use messaging tools freely when no valid delivery
target exists.
Fixes#27898
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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