Latest development builds from the staging branch. These are pre-release builds for testing.

Versioning

• MNE-CPP libraries: Version 2.0.0
• CLI tools (51 ported MNE-C tools, mne_dipole_fit, mne_inspect): Derive version from the MNE-CPP project version (2.0.0) via CMake compile definition
• MNE Scan: Version 1.0.0 (first stable release as a standalone application)
• MNE Analyze: Version 1.0.0 (first stable release as a standalone application)
• IConnector plugin interface: Bumped to mne_rt_server/2.0

Breaking Changes

• Library renames: connectivity → conn, communication → com, rtprocessing → dsp, inverse → inv, disp3D_rhi → disp3D
• Class renames: Inverse library classes now use Inv prefix (InvRapMusic, InvMinimumNorm, InvSourceEstimate, InvHpiFit, …)
• Moved classes: InvInverseOperator, InvMeasData, InvMeasDataSet moved from inv to mne library (as MNEInverseOperator, MNEMeasData, MNEMeasDataSet); backward-compatible forwarding headers provided
• Moved classes: FwdForwardSolution moved to MNEForwardSolution in the mne library; forwarding header in fwd/ for backward compatibility
• Removed: InvCorSourceEstimate class (superseded by unified InvSourceEstimate)
• Split: MNEMath split into Linalg and Numerics in the math library
• Moved: events library moved into mne_analyze application (no longer a standalone library)
• Qt requirement: Qt 6.10.0 minimum (Qt 5 no longer supported)
• Eigen upgrade: Eigen 5.0.1

New Features

• 51 CLI tools: Ported all MNE-C command-line tools to modern C++ with QCommandLineParser and ApplicationLogger
  • Conversion: mne_edf2fiff, mne_ctf2fiff, mne_kit2fiff, mne_brain_vision2fiff, and more
  • Forward modeling: mne_forward_solution, mne_setup_forward_model, mne_prepare_bem_model, mne_make_source_space, mne_make_sphere_bem, mne_average_forward_solutions
  • Inverse: mne_compute_raw_inverse, mne_compute_mne, mne_inverse_operator
  • Preprocessing: mne_anonymize, mne_process_raw, mne_compensate_data
  • Surface: mne_surf2bem, mne_check_surface, mne_watershed_bem, mne_flash_bem
  • Info: mne_show_fiff, mne_compare_fif_files, mne_list_source_space, mne_list_bem
  • Server: mne_rt_server
  • Simulation: mne_simulate_data
• Unified InvSourceEstimate: Single class with composition layers for grid data, focal dipoles, couplings, connectivity, positions, and metadata; includes tokenization support for streaming
• RHI-based 3D rendering: Migrated from Qt3D to QRhi pipeline with holographic rendering mode, Fresnel effects, dipole overlay, and async STC loading
• Flexible clustering: Variable cluster sizes in source space computation
• MNE Scan improvements: Plugin loading progress on splash screen, macOS app bundle icons
• LSL library modernized: Added lsl_ prefix, comprehensive tests, updated to LSL 1.17.5

Refactoring & Modernization

• Forward library (fwd): Removed ~700 lines of dead code; replaced printf → qInfo/qWarning; replaced goto → early return/lambdas; replaced C macros (ARSINH, EPS) → constexpr/inline; modernized FwdBemModel members from raw pointers to Eigen types and std::shared_ptr
• FIFF I/O consolidation: Moved duplicated FIFF reading functions to library classes (FiffStream::read_bad_channels, MNECovMatrix::read, MNERawInfo::find_meas_info)
• Thread safety: Fixed thread-unsafe static float* in MNEProjOp::project_vector using thread_local
• Network input validation: Added bounds checking in BabyMEG client byte conversion functions
• Sparse matrix crash fix: Guarded MNEHemisphere::operator== against segfault on default-constructed sparse matrices
• Copyright: Updated to 2026 across all library headers
• Qt6 serialization: Updated QDataStream version from Qt_5_1 to Qt_6_0 in rt_server
• Centralized CLI versioning: All 51 CLI tools now derive their PROGRAM_VERSION from the CMake project version (MNE_CPP_VERSION) instead of hardcoded strings
• Format specifier fix: Fixed %d → %lld for qsizetype in BabyMEG client warnings

CI/CD

• Restructured to Main-Staging-Feature branch model
• Build matrix: Ubuntu 24.04, macOS 26, Windows 2025 with Qt 6.10.0 and Qt 6.10.2
• CodeQL and Coverity static analysis (weekly)
• Code coverage tracking with 35% library threshold
• CPackIFW-based installer generation (.run, .dmg, .exe)
• WebAssembly build support

Documentation

• Docusaurus-based documentation site
• Organized CLI tools by domain category in sidebar
• Added MNE handbook reference pages (cookbook, FIFF format, sample dataset, data conversion)
• Completed Doxygen documentation for InvRapMusic, InvMinimumNorm, InvDipole

Bug Fixes

• Fixed crash in make_inverse_operator with non-surface-oriented forward solutions
• Fixed segfault in forward computation
• Fixed FIFF double I/O, make_dir EOF, write_cov packing, and source_cov kind
• Fixed MNECTFCompDataSet copy constructor member initialization
• Fixed coordinate transformation handling in 3D visualization
• Fixed inflated brain alignment and surface projection tolerances
• Fixed floating-point comparison tolerances in forward solution tests
• Fixed sphere simplex test convergence

Pre-built static Qt 6.10.2 binaries for CI

For details please see the changelog for v0.1.9.

For details please see the changelog for v0.1.8.

For details please see the changelog for v0.1.7.

For details please see the changelog for v0.1.6.

For details please see the changelog for v0.1.5.

For details please see the changelog for v0.1.4.

For details please see the changelog for v0.1.3.