we need wheels for python 3.14, it's falling back to numpy which requires all the tools to compile from source

Start by reviewing the repository's automated CI toolchain and Python-version wheel jobs, then reproduce the Windows Python 3.14 installation failure shown in the report. Done means compatible wheels are produced and published for Python 3.14 so installation no longer falls back to building NumPy from source.

opencv doesnt work with python 3.14
opencv wheels for python 3.14
opencv update needed
opencv numpy

Using cached opencv_python-4.12.0.88-cp37-abi3-win_amd64.whl.metadata (19 kB)
Collecting numpy<2.3.0,>=2 (from opencv-python)
Using cached numpy-2.2.6.tar.gz (20.3 MB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Installing backend dependencies ... done
Preparing metadata (pyproject.toml) ... error
error: subprocess-exited-with-error

× Preparing metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [21 lines of output]
+ C:\Users\Arthur\AppData\Local\Programs\Python\Python314\python.exe C:\Users\Arthur\AppData\Local\Temp\pip-install-lo_d4nz9\numpy_5d32a18868064226ad139d5718fc80e4\vendored-meson\meson\meson.py setup C:\Users\Arthur\AppData\Local\Temp\pip-install-lo_d4nz9\numpy_5d32a18868064226ad139d5718fc80e4 C:\Users\Arthur\AppData\Local\Temp\pip-install-lo_d4nz9\numpy_5d32a18868064226ad139d5718fc80e4.mesonpy-u1w001bs -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=C:\Users\Arthur\AppData\Local\Temp\pip-install-lo_d4nz9\numpy_5d32a18868064226ad139d5718fc80e4.mesonpy-u1w001bs\meson-python-native-file.ini
The Meson build system
Version: 1.5.2
Source dir: C:\Users\Arthur\AppData\Local\Temp\pip-install-lo_d4nz9\numpy_5d32a18868064226ad139d5718fc80e4
Build dir: C:\Users\Arthur\AppData\Local\Temp\pip-install-lo_d4nz9\numpy_5d32a18868064226ad139d5718fc80e4.mesonpy-u1w001bs
Build type: native build
Project name: NumPy
Project version: 2.2.6
WARNING: Failed to activate VS environment: Could not find C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe

  ..\meson.build:1:0: ERROR: Unknown compiler(s): [['icl'], ['cl'], ['cc'], ['gcc'], ['clang'], ['clang-cl'], ['pgcc']]
  The following exception(s) were encountered:
  Running `icl ""` gave "[WinError 2] O sistema não pode encontrar o arquivo especificado"
  Running `cl /?` gave "[WinError 2] O sistema não pode encontrar o arquivo especificado"
  Running `cc --version` gave "[WinError 2] O sistema não pode encontrar o arquivo especificado"
  Running `gcc --version` gave "[WinError 2] O sistema não pode encontrar o arquivo especificado"
  Running `clang --version` gave "[WinError 2] O sistema não pode encontrar o arquivo especificado"
  Running `clang-cl /?` gave "[WinError 2] O sistema não pode encontrar o arquivo especificado"
  Running `pgcc --version` gave "[WinError 2] O sistema não pode encontrar o arquivo especificado"

  A full log can be found at C:\Users\Arthur\AppData\Local\Temp\pip-install-lo_d4nz9\numpy_5d32a18868064226ad139d5718fc80e4\.mesonpy-u1w001bs\meson-logs\meson-log.txt
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> numpy

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.