From the original core to actively maintained forks
The original Clash core established a way to organize proxy configurations using profiles, proxy groups and routing rules. The original project is no longer maintained, but that didn’t end development across the ecosystem: clients have adopted newer cores or retained existing features. Meta is a major feature-enhanced fork, while mihomo continues development in the same core family. So a client name containing Clash only indicates a connection to this ecosystem; it doesn’t tell you which core it uses, which protocols it supports or how compatible its configurations are.
When reading a tutorial, first check whether it covers the core or the client interface. References to YAML fields usually concern the core, while steps for tray controls, profile overrides and background permissions concern the client and operating system. Keeping these settings separate helps avoid looking for desktop-only menus in a mobile app or adding an app-specific local option to a subscription profile.
GUI and core updates are independent
Graphical clients such as FlClash and Clash Verge Rev provide subscription management, proxy group selection and system traffic capture around a core. An interface update may only change how the app works, or it may also replace the core. Core updates can change protocol support, DNS behavior or field requirements. Choose a client based on whether it explicitly supports the features you need, not on its name alone. Compare the details in the Client Selection Guide.
Mobile clients are also constrained by operating system background policies and network extension permissions. Don’t assume that scripts, process matching or system integrations available on desktop are also available on phones. If you reuse a configuration across devices, keep shared rules in the configuration and set battery optimization, startup behavior and system proxy options separately in each client.
Check configuration compatibility field by field
Using YAML doesn’t mean different cores can fully read the same configuration. Protocol names, transport parameters, rule sets and DNS fields may not be supported everywhere. If an import reports an unknown field or unsupported proxy type, save the error and check the core’s capabilities. Removing fields without understanding them may let the profile load while changing its routing or DNS behavior. Subscription conversion also works only for features the target format can represent.
There’s no one-size-fits-all protocol ranking. Network quality, server implementation, transport and your phone’s wireless conditions all affect performance. To compare connection stability and battery use, keep other conditions consistent and monitor real requests, reconnects and background activity. The technical reference covers protocol trade-offs and DNS resolution and traffic capture by use case.
Record settings before updating; verify a small set afterward
Client updates, core updates and subscription updates are three different things. The first two change software; the last changes remote configuration. Before updating, note your current mode, important proxy group selections and local overrides. Use the client’s export feature to preserve settings you need. Afterward, test one or two commonly used services, then check rule matches and background connectivity. There’s no need to rebuild the entire configuration right away.
Open-source code can help you understand implementation, follow issue discussions and track fixes, but a public repository isn’t a substitute for reading the release notes for a specific build. If something goes wrong, first narrow it down to steps you can reproduce, then record the operating system, client, error message and steps already tried. Logs may contain visited domains, server addresses or subscription credentials, so remove unrelated personal data before reporting an issue.
