Agent JIT: DeepSeek Harness Plugin

Agent JIT is a plugin for DeepSeek Harness designed to optimize deterministic execution paths in LLM agent development. It separates mechanical execution logic and compiles constrained DSL programs for direct execution by the runtime, significantly reducing token consumption and context exposure. Its core features include deterministic path compilation and a tool adaptation contract that supports dynamic tool discovery and synchronization. It provides meta-tools (such as `jit_describe_tools`) and an official bridge, enabling host tools to be called directly from within the DSL. Installation is straightforward, and it supports configuring experimental modes and routing policies. By offloading cumbersome steps from model calls, Agent JIT preserves the flexibility of the LLM as a planner while significantly improving the agent.