Justin Schroeder argues that business-critical agents need constrained toolsAn agent permission boundary defines and enforces which resources and actions an automated agent is allowed to use., repeatable execution and task-specific evaluationEvaluation is the systematic assessment of a system's behaviour or results against explicit criteria.. He contrasts narrowly scoped agents with general assistants carrying broad sets of tools.
Justin Schroeder introduces an open specification that describes agent packages, models, prompts, tools and runtime behaviorAn AI agent runtime is the execution system that manages an agent's model calls, tools, state, permissions, and task lifecycle.. He explains the intended portability and composition benefits as goals of the proposal.
Justin Schroeder demonstrates a warranty-claim agent and describes hooks, scheduled effects, thread environments and model selection. The demonstration illustrates his team’s implementation rather than proving interoperability across all runtimes.
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