Experience Compression Spectrum: Unifying Memory, Skills, and Rules in LLM Agents

The paper's real contribution isn't any single compression technique but the claim that episodic memory, procedural skills, and declarative rules are points on one continuous spectrum rather than categorically different storage problems. That framing, if it holds, changes how engineers budget context and design retrieval pipelines from the start rather than bolting them together later.

This sits in direct conversation with the K-Token Merging paper published the day before (arXiv, April 16), which attacks the same context-overhead problem from the token level upward. Where K-Token Merging compresses the sequence itself during inference, the Experience Compression Spectrum operates at the architectural and design level, asking what should be stored in what form before inference even begins. The two approaches are complementary rather than competing, and together they sketch a fuller picture of where compute is being wasted in long-horizon agent deployments. The WORC multi-agent optimization paper from April 17 adds a third angle: even well-compressed agents fail if the weakest collaborator in a pipeline amplifies errors downstream.

Watch whether any of the 20+ systems the paper maps adopt the spectrum as a design primitive in their next public release within six months. If even two or three do, the framework has moved from taxonomy to engineering standard; if none cite it, it likely remains a useful literature review rather than a practical tool.