// Package singbox hosts the L-UI xray→sing-box migration (ITEM6) assets.
//
// B0 deliverable: the golden fixture corpus under testdata/golden — for each
// protocol × representative transport, a current-shape sample (input.json),
// the expected sing-box fragment (expected-singbox.json), and the expected
// share-link output (expected-link.txt) produced by the CURRENT code at
// main 8e89960. B1 (data model + migrator) and B2 (config builder) consume
// these fixtures as their acceptance baseline:
//
//   - the converter's output for input.json must equal expected-singbox.json
//     (keys starting with "_" are fixture metadata, stripped before compare);
//   - subscription links regenerated from the converted model must equal
//     expected-link.txt byte for byte (ITEM6-SCOPE §2.4 invariants).
//
// Subscription baselines cover the LINK route only. Per the 2026-10-23
// product decision, the JSON and Clash subscription families are being
// removed entirely (separate work line); no baselines are kept for them.
//
// The conversion spec lives in ~/workspace/xui-lite-work/ITEM6-CONVERSION-SPEC.md.
package singbox