Matching the same part across two sites' catalogues using evidence tiers, so stock can be shared instead of re-bought.
Two sites held the same parts under different codes.
Nobody could tell reliably whether site A's item existed at site B. So stock was ordered new while the same part sat idle down the road.
A matching capability inside the agent, built around one anchor: the supplier part number.
A matching number alone is never enough. Corroboration is required before any match is called an equivalent.
The whole design leans one way. When the evidence is thin, the system claims less.
Every potential match lands in a tier, and the tier is earned.
During testing, the matcher produced one false match. A single digit had been transposed when a code was composed.
That failure became a permanent rule. Codes are copied character for character from returned rows, and near misses are detected automatically.
The proof here is not a clean run. It is that the one error found was turned into a check that runs every time.