Safe Voice Commands for My Home Automation Server

说明与用途

家居自动化语音控制系统使用正则表达式白名单，仅允许已批准的命令，并在必要时回退到LLM处理变体。

问题

Voice assistants can misinterpret speech‑to‑text, potentially triggering dangerous actions; a deterministic gate was needed to allow only approved commands.

结果

The system now safely processes voice commands, rejecting any that do not match the whitelist and only allowing a small, auditable set of actions.

工作流

• 1. Create a JSON whitelist of regex patterns and corresponding actions.
• 2. Load the whitelist in the server code.
• 3. On receiving a transcript, iterate over the whitelist and test each pattern (case‑insensitive).
• 4. If a match is found, return the associated action and execute it (e.g., send MQTT or run a script).
• 5. If no match, call the LLM with a narrow prompt that lists allowed actions and expects one keyword or "unknown".
• 6. If the LLM returns a known action, execute it; otherwise reject the command and log a warning.

证据

filter everything through a whitelist regular expression before handing the text to a language model

来源

I kept the whitelist in a JSON file so I could edit it without touching code.

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run the regex first, and only if it fails do I fall back to the LLM with a very narrow prompt

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