best-practices-delivery-proof

Why this skill exists

On 2026-08-18 an agent spent over an hour failing to deliver one prompt to one human-named browser tab. Five submits failed the same way. The agent twice told the human the prompt was "submitted and generating" while the destination tab held nothing. The human had to say "I'm looking at the browser tab now" to force a read-back the agent should have done first. Every failure was pre-answered by a contract the agent had been told to read and had only grepped. None of the rules below are aspirations; each one names the exact receipt that paid for it.

Rule 1 — A delivery claim requires a receipt from the DESTINATION

A statement that something was sent, submitted, delivered, posted, or landed is a claim about the destination, so only the destination can prove it. The transport's opinion of itself is never sufficient, however official it looks.