As autonomous agents' interactions with humans become richer, w e believe it will become increasingly important for s o m e of the agents to have believable and engag- ing personalities. In previous papers w e have described Tok, a broad agent architecture which integrates reactiv- ity, goal-directed behavior, emotion and s o m e m e m o r y and inference for agents in non-real-time worlds. In this paper w e discuss the issues raised w h e n w e extend Tok to work in real-time, animated domains. Convincing animated motion poses three challenges to the architec- ture: multipleprimitiveactions and higher level activities must be executed simultaneously; future actions must be k n o w n before current actions complete, to enable smooth animation; and the mind must be fast enough to provide the impression of awareness. Here w e describe Hap, the reactive substrate of Tok, and its approaches to these challenges. T h e described architecture was used for the creation of three agents, called woggles, in a world titled Edge of Intention, which was firstshown at the A A A I - 9 2 Al-based Arts Exhibition.

Researchers studying autonomous agents are increasingly examining the problem of integrating multiple capabilities into single agents. The O z project is developing technology for dramatic, interactive, simulated worlds. One requirement of such worlds is the presence of broad, though perhaps shallow, agents. To support our needs, we are developing an agent architecture, called Tok, that displays reactivity, goal-directed behavior, and emotion, along with other capabilities. Integrating the components of Tok into a coherent whole raises issues of h o w the parts interact, and seems to place constraints on the nature of each component. Here w e describe briefly the integration issues w e have encountered in building a particular Tok agent (Lyotard the cat), note their impact on the architecture, and suggest that modeling emotion, in particular, may constrain the design of integrated agent architectures.