* Get group name from either string or object format * @param {string|object} group - Surge string or Clash object format group * @returns {

* Get only valid proxies (filter out comment lines for unsupported types) * @returns {string[]} Array of valid proxy strings (excluding comments)

* Convert Clash object-format proxy-group to Surge string format * @param {object} group - Clash format group {name, type, proxies, url?, interva

* Convert Sing-Box selector/urltest outbound to Clash proxy-group format * @param {object} outbound - Sing-Box outbound object * @returns {object|nu

* Escape special regex characters in a string for use inside subconverter regex

* Evaluate test results against expected values

* Generate outbound_providers configuration from collected URLs * @returns {object[]} - Array of outbound provider objects

* Generate proxy-providers configuration from collected URLs * @returns {object} - proxy-providers object

* Helper function to get nested property by path (e.g., "tls.alpn")

* Get list of provider names * @returns {string[]} - Array of provider names

* Get list of provider tags * @returns {string[]} - Array of provider tags

* Check if subscription format is compatible for use as a provider * Override in child classes to enable provider support * @param {'clash'|

* Merge user-defined proxy groups with system-generated ones * Override in child classes to implement format-specific merge logic * @param {

* Parse interval string to seconds * @param {string|number} interval - Interval value (e.g., "5m", "300", 300) * @returns {number} - Interval in sec

* Parse key=value parameters from a Surge proxy line * @param {string[]} parts - Array of parameter strings * @returns {object} - Parsed parameters

* Parse plugin string from URL query parameter * Format: "simple-obfs;obfs=http;obfs-host=example.com" or "v2ray-plugin;mode=websocket;host=example.c

* Parse Surge proxy-group line into Clash-compatible object * Format: "GroupName = type, Node1, Node2, key=value, ..." * @param {string} line - Surg