One-minute answer
For “How to Protect Clash Configs, Subscription URLs and Logs — A Step-by-Step Guide”, change one variable at a time and record the result.
Keep a rollback path: disable system proxy, exit TUN and retain a working profile.
Check before starting
Confirm architecture and source. Treat profile URLs and logs as sensitive.
Managed devices may restrict network extensions and services.
Follow this order
Start the client, verify the core, import an authorized profile, choose one route, enable system proxy, then test TUN.
Validate after every step.
Read errors correctly
Start with the first explicit log error. Low latency does not guarantee every site is fast.
Check time, DNS, firewall, syntax and permissions.
Verify the result
Restart and test common apps, then back up the working state.
Use current release notes when labels change.