## 1. Fix budget, units and required conditions

Restate brandsA/B, USD 300 maximum, 30mi radius and seller condition requirement. List fields and missing-value rules. Do not search, obtain user location or contact sellers.

Expected: Explicit selection criteria.
Check: Units fixed and budget not widened.

## 2. Merge repeated observations by identity

Group5 snapshots by listing_id, retaining original rows/times. L01/L04 form item1’s280→270 history. Keep both values and do not create two listings from changed titles/prices.

Expected: Four identities with history.
Check: item1 counts once and theUSD10 change is traceable.

## 3. Separate unknown fields from nonmatches

Check price, distance, brand, state and condition claim. Keep item3 distance pending; exclude item2 over budget and item4 sold. Infer no inspected condition.

Expected: Four filter outcomes.
Check: Only item1 completely matches; item3 is not treated as0mi.

## 4. Explain candidate reasons and inspection questions

Write summary, candidate changes, exclusions and questions. Label good as seller-stated; accessories/faults/repairs remain unknown. Keep a local report; do not contact, offer or pay.

Expected: A report and verification questions.
Check: Price fit is not purchase endorsement or quality verification.

## 5. Observe a bounded real scope with timestamps

Read at most 10 listings from <specified platform/city/criteria>. Record listing_id, time, visible fields and failures. Do not guess distance. Let the user handle verification. Do not contact/transact or collect unrelated personal information.

Expected: A bounded real report or blocker.
Check: Coverage explicit; no lowest-everywhere or inspected-quality claim.

## 6. Distinguish discoveries, discounts and removal

Draft a listing-watch Skill with criteria, listing_id, time, deduplication, price changes, sold states and gaps. Propose a Routine only. Notify the current user on new matches/discounts/status changes; never message sellers, bid or pay.

Expected: Rerun/change rules.
Check: Repeated sightings are not new; sold listings do not stay available.