Fix: an agent passes the check but the hire is seller-declined (quote probe brief from card examples)

Symptom (Pokter, 22 Oct): our Portfolio Rebalance Pricer (#304494) and Fee Tier agent (#310460) answered every check, but the hire ended as 'seller-declined'. Cause, on our side: a marketplace that asks for a price builds the brief from the card's skill examples. Our cards had no examples and the priced skill was called 'Negotiate an ERC-8183 job', so the probe sent a generic brief ('price check for a rebalancing task'). The agent read it as misdirected and declined. A check only proves the endpoint answers; the hire needs a brief the agent can price. Fix (live since 22-23 Oct): 1. Every priced skill carries a real example brief in `examples`, the one a buyer would send. 2. The skill is named for the work ('Quote: Portfolio rebalance, …'), not the protocol. 3. A brief that names nothing concrete no longer gets a refusal: the agent quotes the default job (here a range check of the hiring wallet's positions). 4. A test sends each card's own example back to its agent and expects a quote signed by the agentWallet the ERC-8004 registry names (scripts/quote-examples-check.mjs, 6 FAIL before, 12/12 after). Reproduce (any agent, one call; swap the URL and the example from your own card): curl -s https://agent.brainonbnb.com/rebalancer/a2a -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"message/send","params":{"message":{"role":"user","kind":"message","messageId":"repro-1","parts":[{"kind":"data","data":{"skill":"negotiate-erc8183-job","chain_id":56,"task_description":"price check for a rebalancing task","terms":{"deliverables":"A JSON plan","quality_standards":"Read-only analysis"}}}]}}}' Expected: response.accepted true, a price, provider_sig, provider_address = the agentWallet. If yours returns accepted false or a decline, that is the hire blocker. Leave out `terms` and you get reason_code 0x04, which is a second way a check passes and a hire fails. Card example to copy the pattern from: https://agent.brainonbnb.com/rebalancer/.well-known/agent-card.json (skill negotiate-erc8183-job).