diff --git a/packages/leb128/meta.yaml b/packages/leb128/meta.yaml
new file mode 100644
index 00000000..ef8ebdba
--- /dev/null
+++ b/packages/leb128/meta.yaml
@@ -0,0 +1,16 @@
+package:
+  name: leb128
+  version: 1.0.9
+  top-level:
+    - leb128
+source:
+  url: https://files.pythonhosted.org/packages/0c/f6/62cd379fe8527c6d685013ebed11c85fd4fced125bde9b3c80ebd5759850/leb128-1.0.9-py2.py3-none-any.whl
+  sha256: fef16ef20aca33dfdd2f4841d8004ec4acb7ed8545b63a7bc1183292c9a3e594
+about:
+  home: https://github.com/mohanson/leb128
+  PyPI: https://pypi.org/project/leb128
+  summary: LEB128(Little Endian Base 128)
+  license: MIT
+extra:
+  recipe-maintainers:
+    - juntyr
diff --git a/packages/numcodecs-combinators/meta.yaml b/packages/numcodecs-combinators/meta.yaml
new file mode 100644
index 00000000..4a32d6f7
--- /dev/null
+++ b/packages/numcodecs-combinators/meta.yaml
@@ -0,0 +1,22 @@
+package:
+  name: numcodecs-combinators
+  version: 0.2.13
+  top-level:
+    - numcodecs_combinators
+source:
+  url: https://files.pythonhosted.org/packages/74/31/9025c0d42432aa65f2b997713485ff38298e1e9036696820c752cbdff960/numcodecs_combinators-0.2.13-py3-none-any.whl
+  sha256: 6aac7ff38eedd153b191059636d9e9ff448e892f1dde0b44dab30d5cde2f4c90
+requirements:
+  run:
+    - leb128
+    - numcodecs
+    - numpy
+    - typing-extensions
+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
+extra:
+  recipe-maintainers:
+    - juntyr
diff --git a/packages/numcodecs-observers/meta.yaml b/packages/numcodecs-observers/meta.yaml
new file mode 100644
index 00000000..1278c2fe
--- /dev/null
+++ b/packages/numcodecs-observers/meta.yaml
@@ -0,0 +1,22 @@
+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
+extra:
+  recipe-maintainers:
+    - juntyr
diff --git a/packages/numcodecs-wasm/meta.yaml b/packages/numcodecs-wasm/meta.yaml
new file mode 100644
index 00000000..5327694d
--- /dev/null
+++ b/packages/numcodecs-wasm/meta.yaml
@@ -0,0 +1,32 @@
+package:
+  name: numcodecs-wasm
+  version: 0.2.4
+  tag:
+    - rust
+  top-level:
+    - numcodecs_wasm
+source:
+  url: https://files.pythonhosted.org/packages/source/n/numcodecs_wasm/numcodecs_wasm-0.2.4.tar.gz
+  sha256: 2ea3647ee5250ac440bca6c0198a668f0b9f61547df5af40bf45afc0317313d6
+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
+extra:
+  recipe-maintainers:
+    - juntyr