**Sierra** is a local, deterministic Context Layer Machine designed to give AI systems persistent and structured conversational context without relying on an LLM for context management. It transforms user input into structured semantic relations, resolves references using explicit context, validates consistency, and maintains context across interactions. When local knowledge is insufficient, Sierra can route the request through a controlled WebGate/WebQuery path. The goal is simple: **replace fragile conversation rules with a structured context layer that can understand, validate, and maintain what has been established during an interaction.**
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