WE BUILT THREE MEMORY SYSTEMS. THE MOST EXPRESSIVE ONE WASN'T THE MOST USEFUL

Summary from the TLDR Data newsletter

Tiger Data gave its Slack agent memory three ways: a list of facts, a knowledge graph, and a tree. Agents struggled to decide what graph edges meant. A tree built on Postgres's ltree extension worked better, and filing a thread summary dropped from dozens of turns to one tool call. Its search layer became searchgres.js.