Dev.to
5/10/2026

One Input Box, Two AI Modes — Detecting Whether the User Wants Error Help or Command Explanation
Short summary
HiyokoHelper, an open-source terminal assistant, automatically detects whether users need error diagnosis or command explanation without mode selection, using pattern matching to route to appropriate prompts. The Rust implementation supports multi-language prompts (English/Japanese) and updates the interface in real-time as users type. Developers can directly adapt the pattern matching logic for their own CLI tools.
- •Detects intent automatically from terminal input using pattern matching on command prefixes
- •Routes to contextualized prompts without requiring users to select a mode
- •Multi-language support with real-time UI feedback
Generated with AI, which can make mistakes.
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