// Package birdfmt builds BIRD 2 configuration text: main bird.conf skeleton, include
// fragments under bird.d/, export filters, static route protocols, BGP templates, and
// BGP peer protocols (from template or standalone). Runtime helpers parse-check configs
// (bird -p) and reload (birdc configure).
//
// # Layout
//
// Operator keeps a stable bird.conf (or generated skeleton) next to EvoBGP fragments:
//
//	bird.conf              — router id, protocol device, protocol direct, include lines
//	bird.d/evobgp_*.conf   — generated prefixes, filters, BGP templates, peers (names from constants)
//
// Include order should list filter definitions before protocols that reference them
// (see StandardIncludeFragments).
//
// # Apply workflow
//
// 1. Write new fragment files to a staging directory, run bird -c <bird.conf> -p.
// 2. Atomically swap staging → live config dir, then birdc configure (see BirdCtl).
package birdfmt