// Package tools hosts the open API tool endpoints (GET/POST /tools/*).
//
// Naming rule: every sub-feature gets its own directory under tools/, and the
// Req/Res contracts live in an index.go inside that directory, e.g.
//
//	api/open/v1/tools/uuid/index.go    - GET /tools/uuid
//	api/open/v1/tools/md5/index.go     - POST /tools/md5
//	api/open/v1/tools/random/index.go  - GET /tools/random
//	api/open/v1/tools/time/index.go    - GET /tools/time
//	api/open/v1/tools/ip/index.go      - GET /tools/ip
//
// Add a new feature by creating tools/<name>/index.go and a matching method
// in internal/controller/open/<name>.go; the router binds it automatically.
package tools