state

Conversations and agent tasks grow past the context window, and the naive 'stuff the whole history' approach breaks on cost, latency, and lost-in-the-middle. The signal is a tiered memory design: recent buffer, summarized mid-term, retrieved long-term.

You cannot wait for all the data, and buffering an unbounded stream will OOM. The signal is windowed joins with watermarks for stream-stream, lookup joins for stream-table, and a clean account of late and out-of-order events.