Speculative & Parallel Tool Execution(STE)

Predicts the likely next tool call from recurring agent trajectories and executes it speculatively while the LLM is still generating, keeping the speculative result isolated until the model confirms the call and discarding it on a misprediction. It also covers launching retrieval partway through a streaming user turn and returning partial or streamed tool results. Distinct from async-await, fork-join, scatter-gather, and map-reduce, which all fan out already-decided, known-independent calls; the novelty here is acting on an unconfirmed predicted call so tool latency overlaps generation instead of following it.