Releases

`cheatah-space`

Every notable change, release by release.

All notable changes to cheatah-space. This project is alpha — expect breaking changes between releases. It is a cheatah standard-library extension and joins the Biome Standard alongside the other cheatah extensions.

v0.1.0-alpha (2026-08-14) — the time module, house-gated

The first release-shaped state of the repo: one working module, space.time (Julian Date, Modified Julian Date, the J2000 epoch offsets, and the NASA CDF_EPOCH bridge), hand-authored as header-only, concept-templated C++20 — scalar and ndarray-vectorized through the same functions — plus the full extension-grade QA harness around it. space.cdf and space.irbem remain roadmaps (design notes in their subdirectory READMEs); nothing of them ships here.

The module

space.time: 3 reference-epoch functions (jd_unix_epoch, jd_j2000, cdf_epoch_unix_offset_ms) + 10 conversions (unix_to_jd/jd_to_unix, jd_to_mjd/mjd_to_jd, unix_to_mjd/mjd_to_unix, jd_to_j2000_seconds/ jd_to_j2000_centuries, unix_to_cdf_epoch/cdf_epoch_to_unix), each accepting a numeric scalar or a numeric ndarray through one TimeInput-constrained template.
Every public function's docs carry @complexity, @alloc, truthful @systest tags naming the systests that cover it, and an @par Example with a compiling @code{.purr} block (the doc-examples convention; the gate compiles all 13 blocks).

Biome packaging

cheatah.toml manifest (pure cheatah: no extension or system dependencies; targets the 1.10.0-alpha toolchain).
scripts/sign-modules.sh writes the .sha512 sidecars that make import space / import space.time resolve as VERIFIED modules on the extension path.
scripts/test-biome-install.sh sandboxes the real consumer flow: the space/ package copied to a throwaway dir, a fresh project compiled with cheatah env vars cleared and only CHEATAH_MODULE_PATH wired — a Julian-date round trip must print RESULT: PASS.

QA gate grown to the extension bar

scripts/qa_gate.sh (pre-push enforced) now runs: 100% unit coverage (clang source-based, lines + functions over the space headers, README table drift-checked) → 100% Javadoc (scripts/doc_coverage.sh) + compiling doc examples → module-sidecar verification → debug build → the .purr systests (moved from tests/ to systests/) → the biome-install sandbox → GoogleTest unit suite (tests/space_time_test.cpp, new) → ASan + UBSan → Valgrind memcheck (security/run-valgrind.sh) → cppcheck → the private-reference scan (also guarding commit messages via the commit-msg and pre-push hooks).

Removed

cmake/CPM.cmake — dead: nothing referenced it (the toolchain is the sibling checkout / CHEATAH_DIR, and biome consumers get headers only).

Roadmap (unchanged)

space.cdf — native NASA Common Data Format reader/writer, from scratch, zero dependencies; brings CDF_TT2000 + EPOCH16 with its leap-second table.
space.irbem — clean-room reimplementation of the radiation-belt / magnetic-field model library (coordinate transforms → IGRF → Tsyganenko fields → L*/drift shells).