Before publishing, the agent must prove its claims, sources attached.
A publication guardrail treats every factual sentence as a claim that needs a citation. The pipeline extracts claims, retrieves candidate sources, and refuses to publish until each claim maps to a passage that actually supports it, not merely a page that mentions the topic.
Tying the gate to evidence rather than tone is what makes it trustworthy. A draft that reads well but cites nothing is held back, and the failure report points at the exact unsupported sentence, so the fix is targeted instead of a full rewrite.