Parsers basics: rewriting a profile as it downloads

Parsers (Settings → Parsers) and Mixin both modify configs, but at different moments: a Parser runs once at subscription download/update time and writes the result into the local profile; Mixin overlays dynamically on every load.

Basic syntax

Parsers are YAML describing "for which subscription, do what":

parsers:
  - url: https://your-provider.com/subscribe?token=xxx
    yaml:
      prepend-rules:
        - DOMAIN-SUFFIX,work-internal.com,DIRECT
      append-proxies:
        - name: my-backup
          type: ss
          server: 1.2.3.4
          port: 8388
          cipher: aes-256-gcm
          password: your-password

url targets one subscription exactly; prepend-rules/append-rules insert before/after the rule list; prepend-proxies/append-proxies do the same for nodes — solving YAML-Mixin's replace-only pain, and scoped to a single subscription.

Parser vs Mixin: who does what

• Changes tied to one subscription (adding your own node to provider A) → Parser;
• Changes that must be global (one DNS config for every profile) → Mixin;
• When both exist: the Parser writes to the file first, then Mixin overlays at load.