1.0.0 - 2026-08-11

Release summary

CDT++ 1.0.0 is the final planned feature release of the C++23 spherical 2+1-dimensional reference implementation.

Compatibility: The supported source boundary is C++23 with the published GCC, Clang, AppleClang, and MSVC matrix. The project does not promise a stable binary ABI or package-registry distribution.
Scientific corrections: The release completes and independently validates all five 2+1D moves, Metropolis-Hastings proposal ratios and atomic transitions, exact-predicate geometry boundaries, run-owned RNG streams, and causal persistence metadata.
Supported surface: The default build is headless; CGAL/oneTBB bulk Delaunay operations and the macOS Qt viewer are explicit opt-ins. Historical toroidal and higher-dimensional prototypes are excluded from the supported API.
Limitations: Seeds replay stochastic inputs, not necessarily fresh cospherical CGAL topology. Resumable checkpoints continue the identical Markov chain only on the recorded producer toolchain; they are restart artifacts rather than portable interchange files. Parallelism does not extend to Pachner moves or concurrent manifold access.
Migration: Active development and new work move to causal-triangulations. After the v1.0.0 GitHub and Zenodo handoff, CDT++ enters a maintenance-only stabilization window and becomes read-only only when the owner completes the archival gate.

Added

[breaking] Modernize Python experiment workflows def276a
[breaking] Add offline C++/Rust comparison harness 45b080e
Restore reproducible archival rendering 2662df9
[breaking] Expose reported Metropolis transitions 16d1c76
Add initial-state loading and checkpoint resume e1305d6

Changed

Expose shared artifact lifecycle helpers 2f3ba57
Evaluate Boost alternatives to GMP and MPFR 9a02c39
Harden backend evaluation probes d5c3b71
Format transition validation f183f07
Verify unknown moves preserve transition traces 70ab238
Expect portable producer paths on Windows 5a32b1d

Documentation

Clean up archival documentation references 703b474
Exclude PCG shim from generated reference 7e8734f

Fixed

Serialize Dependabot automation per pull request 7567372
Deduplicate CodeRabbit review requests by revision 7f23d53
Bind Dependabot auto-merge to reviewed revision 72fc5a1
Harden Dependabot review rearming on head updates 5d571c8
Authenticate CodeRabbit review requests as maintainer 375c9ea
Require reviewed Dependabot merges and refresh tooling 7c3a84b
Restore MPFR builds and fail closed on polling errors 1d2e667
Prevent stale vcpkg 9e8d033
[breaking] Preserve coincident causal identities 3f72a16
Harden persistence and vcpkg pin synchronization 3a66693
Canonicalize complete vertex-cell incidence 52f9a58
Bound incidence fingerprint canonicalization 307737c
Harden experiment and repository validation fb7e5b3
Harden cross-platform validation 6b4d012
Pin Python for sanitizer bootstrap 9181494
Refresh portable Python package checks 96baa21
Preserve local runs when Comet mirroring fails 9cadfe7
Harden portable harness validation da7ba14
Select the root vcpkg manifest 1c064fd
Restore vcpkg binary caching 2b27462
Track canonical rendering fixture 7078f69
Harden archival rendering contract 81d366e
Harden transition and documentation validation e955ee6
Queue approved Dependabot updates for auto-merge e63e32f
Enforce v1.0.0 release gates 94ed107
Fail fast and support Dependabot coverage 2107f20
Stabilize macOS viewer and coverage gates deb24ab
Harden checkpoint resume contracts 17bb7fb
Enforce exact checkpoint continuation 95754c4
Harden repository readiness contracts 2840437
Preserve canonical producer paths on Windows 026ba3f
Harden boundary validation and diagnostics 38be43d
Preserve complete subprocess diagnostics 94a0c77

Maintenance

Gate automatic merges on CodeRabbit review 8124227
Bump the github-actions group with 4 updates #134 55d192d
Bump the github-actions group with 2 updates #136 90a3ea6
Automate vcpkg tool pin sync 9631335
Bump the dependencies group with 3 updates #144 098822d
Stagger Dependabot update schedules 9cf5b9d
Bump cryptography from 49.0.0 to 50.0.0 #146 e23d3c4
Bump taiki-e/install-action #152 426edb8

1.0.0-rc3 - 2026-07-28

Added

Restore optional parallel insertion and removal d4dabbe
Add value-oriented move-run orchestration abfa888
[breaking] Add invariant-bearing move preparation e2f7d70
[breaking] Modernize the CGAL 6.2 integration boundary ae7a39b
[breaking] Finalize parallel triangulation support 862637a
[breaking] Publish deterministic C++ oracle fixtures ec53dfa

Changed

[breaking] Normalize public declarations under cdt a02a732
Make MoveAlways replay checks deterministic d7fa637
Own move-run callbacks by value f59c06f
Make seeded replay fixtures cross-platform 3c322ee
Make producer path assertion cross-platform 390adf3

Fixed

Generate GCC 16 reports with LCOV 2.5 324a2aa
Install LCOV documentation dependencies 42fd262
Support pkgx-backed IDE environments 3ce8780
Retain function data during LCOV capture 898a453
Bound GCC branch inconsistencies c7d6a35
Keep oneTBB out of ThreadSanitizer 35b241e
Harden parallel build and provenance 6ef7dd6
Resolve pkgx certificate bundles before vcpkg a123ab8
Restore CodeQL extraction and bound parallel builds 56f13cd
Require fresh fixture provenance 6972970
Stabilize cross-platform validation b0c3169
Stabilize Windows and Semgrep validation b282c0b
Stabilize cached builds and action policy validation 930238a
Enforce action policy on nested paths 745d402
Enforce action policy on shorthand steps 406a482

Maintenance

Suppress ShellCheck for Zsh path expansion 189cc0d
Bump actions/checkout from 7.0.0 to 7.0.1 397e0b4
Bump taiki-e/install-action from 2.83.2 to 2.83.4 30c83fd
Bump github/codeql-action/init from 4.37.0 to 4.37.1 fd04186
Bump github/codeql-action/analyze from 4.37.0 to 4.37.1 16d8fcd
Enforce pkgx-first pinned toolchains f01fca6
Streamline and harden supported build workflows e29f69a
Update v1.0.0-rc3 release date e8f45ea

Performance

[breaking] Avoid rebuilding caches during move validation f574f0f

1.0.0-rc2 - 2026-07-22

Fixed

Verify Zenodo delivery for the current tag 05a6e97

1.0.0-rc1 - 2026-07-22

Added

Persist verifiable stochastic run provenance ce90551

Fixed

[breaking] Enforce atomic moves and validated runtime state #111 4245ac0
[breaking] Make Metropolis transitions reversible and reproducible #112 1d7269c
Harden optional Python experiment lifecycle #113 31f95ab
Enforce causal ergodic move contracts bb53988
Restore sanitizer and coverage reliability f4c7df9
Harden ergodic move rejection cec15b5
Make runtime configuration header self-contained cef03b5

Maintenance

[breaking] Consolidate develop into main #100 2459016
Align repository status reporting with main #109 c37fa09
Add release tooling and repair coverage 1416708
Update docs/RELEASING.md 26196da