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Changelog

All notable changes to this project will be documented in this file. The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.0.1] - 2026-05-21

Changed

  • Refined npm keywords for discoverability: added norad-id, celestrak, satcat, catalog-number, and 3le; dropped the generic designator, encoder, and decoder. No source, API, or behavior changes.
  • Restructured the README for first-time visitors: Install, Usage, and API now precede the Why/history section, and the lead paragraph gained a concrete A0123 ↔ 100123 example.

[1.0.0] - 2026-05-19

Added

  • Initial release.
  • decode(s) — parse an Alpha-5 or plain numeric designator string into its canonical integer form. Accepts numeric strings of any length (for JSON- coerce compatibility) but rejects values outside the 0–339,999 range.
  • encode(n) — encode an integer (0–339,999) into a 5-character designator string, using the Alpha-5 letter prefix for values 100,000 and above. Rejects every non-integer numeric kind (BigInt, boolean, string, null, undefined, NaN, Infinity, floats).
  • Hand-written TypeScript declarations.
  • Test suite covering every example in the Space-Track Alpha-5 documentation, the full A=10..Z=33 letter table, both I/O-skip boundaries in both directions, and a round-trip property check sampling the full 0–339,999 range.