// Package tools hosts the open API tool endpoints (GET/POST /tools/*).
//
// Naming rule: every sub-feature gets its own directory under tools/, named
// after the feature (dir name = package name), and the Req/Res contracts live
// in a file named after the feature inside that directory, e.g.
//
//	api/open/v1/tools/uuid/uuid.go      - GET /tools/uuid
//	api/open/v1/tools/md5/md5.go        - POST /tools/md5
//	api/open/v1/tools/random/random.go  - GET /tools/random
//	api/open/v1/tools/time/time.go      - GET /tools/time
//	api/open/v1/tools/ip/ip.go          - GET /tools/ip
//
// As a feature grows, add more files inside its directory (e.g. idcard.go,
// invoice.go under ocr/) instead of bloating the starting file.
//
// Add a new feature by creating tools/<name>/<name>.go and a matching method
// in internal/controller/open/<name>.go; the router binds it automatically.
package tools