Memory Curator Agent a governance layer for memory in multi-agent systems

I keep seeing the same failure in every multi-agent setup I touch. Memory looks fine on day one. By week three it is half stale facts, half private context that should not have been written publicly, and half decisions that were superseded but never overwritten. Retrieval gets noisier. Users keep repeating context because the right fact ended up in the wrong scope. The recursion limit is not the problem here. The memory itself is the problem. The thing I changed that helped most was the simplest possible rule. Worker agents are not allowed to write to durable memory.