Bargain

A missing specification can justify a question; a seller's answer cannot rewrite the campaign. scavenger.negotiate@1 sends approved questions or offers inside one immutable envelope: candidate, missing evidence, opening/all-in ceilings, currency, delivery constraints, concessions, truthful automation disclosure, prohibited claims, caps, expiry, and stop signals.

Refusal, opt-out, abuse, silence, sale, changed subject, changed payment rail, failed evidence, expiry, or exhausted caps closes automatic messaging. A persuasive reply grants no extra budget, item substitution, private data, or payment method.

Each send has a stable effect identity and redacted receipt. If acknowledgement disappears, unknown_send parks the same thread. Restart neither resends nor creates a second commitment until the destination has been reconciled. Replies remain attributable hostile input rather than policy.

The thread can finish with exact terms, unanswered questions, refusal, expiry, or an offer ready for fresh human review. Bargaining never approves commitment or payment. Continue to Acquisition only after revalidating current evidence, terms, budget, exposure, authority, delivery, and disclosure.