Changelog

We follow additive-only semantics on the public API contract — error code strings, HTTP status mappings and request/response field names are stable. New optional fields and new endpoints can land at any time; deprecations get a 6-month overlap minimum.

Unreleased

• Initial publication of the public API: e-invoice, e-Way Bill, GSP credentials.

(Once we ship updates, list them here in reverse chronological order. Each entry: date, what changed, scope of impact, migration notes.)

Template

## YYYY-MM-DD

### Added
- Endpoint X / field Y.

### Changed
- Behaviour of Z (backwards compatible — existing clients keep working).

### Deprecated
- Endpoint W. Sunset date: YYYY-MM-DD. Replacement: V.

### Fixed
- Edge case in ...