Add the numcodecs-wasm package

packages/numcodecs-combinators/meta.yaml

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+package:
+  name: numcodecs-combinators
+  version: 0.2.12
+  top-level:
+    - numcodecs_combinators
+source:
+  url: https://files.pythonhosted.org/packages/2e/93/0d52d3ca184e75026b2e16b034a48f69e4e6260e2a6007297924a5a3d07d/numcodecs_combinators-0.2.12-py3-none-any.whl
+  sha256: 94b6808c237e3fac8737e554644ea5fed9e5874f012de0a95c5294761e591f8a
+requirements:
+  run:
+    - numcodecs
+    - numpy
+    - typing-extensions
+    - varint
+about:
+  home: https://github.com/juntyr/numcodecs-combinators
+  PyPI: https://pypi.org/project/numcodecs-combinators
+  summary: Combinator codecs for the `numcodecs` buffer compression API
+  license: MPL-2.0

packages/numcodecs-observers/meta.yaml

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+package:
+  name: numcodecs-observers
+  version: 0.1.2
+  top-level:
+    - numcodecs_observers
+source:
+  url: https://files.pythonhosted.org/packages/a2/3f/33efa98c8ada32339d4027a0c0adbaca129dcd0b03c9243d8ca2d8883c70/numcodecs_observers-0.1.2-py3-none-any.whl
+  sha256: 956662ce8d31a1312193a43869bf23948122bff42a842eb831db7f60d37c5a9f
+requirements:
+  run:
+    - numcodecs
+    - numcodecs-combinators
+    - numpy
+    - typing-extensions
+about:
+  home: https://github.com/juntyr/numcodecs-observers
+  PyPI: https://pypi.org/project/numcodecs-observers
+  summary: Observe encoding and decoding in the `numcodecs` buffer compression API
+  license: MPL-2.0

packages/numcodecs-wasm/meta.yaml

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+package:
+  name: numcodecs-wasm
+  version: 0.2.2
+  tag:
+    - rust
+  top-level:
+    - numcodecs_wasm
+source:
+  url: https://files.pythonhosted.org/packages/source/n/numcodecs_wasm/numcodecs_wasm-0.2.2.tar.gz
+  sha256: 894f3d005ad2fe98224aa639c8d5e580d2db046589ed059641335ebf75d7b070
+requirements:
+  executable:
+    - rustup
+  run:
+    - numcodecs
+    - numcodecs-observers
+    - numpy
+    - typing-extensions
+build:
+  script: |
+    # FIXME: remove once https://github.com/pyodide/pyodide/pull/6027 is used in pyodide-recipes
+    export RUSTUP_TOOLCHAIN="nightly-2025-12-10"
+    rustup toolchain install ${RUSTUP_TOOLCHAIN}
+    rustup target add wasm32-unknown-emscripten --toolchain ${RUSTUP_TOOLCHAIN}
+about:
+  home: https://github.com/juntyr/numcodecs-rs
+  PyPI: https://pypi.org/project/numcodecs-wasm
+  summary: numcodecs compression for codecs compiled to WebAssembly
+  license: MPL-2.0

packages/varint/meta.yaml

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+package:
+  name: varint
+  version: 1.0.2
+  top-level:
+    - varint
+source:
+  url: https://files.pythonhosted.org/packages/source/v/varint/varint-1.0.2.tar.gz
+  sha256: a6ecc02377ac5ee9d65a6a8ad45c9ff1dac8ccee19400a5950fb51d594214ca5
+about:
+  home: http://github.com/fmoo/python-varint
+  PyPI: https://pypi.org/project/varint
+  summary: Simple python varint implementation
+  license: MIT