Pre-release

This release is a pre-release and may not be stable for production use.

baml_core

Python bindings for the BAML runtime (powered by bex_engine).

baml_core is the bridge layer that generated baml_sdk packages import at runtime: it provides the BamlRuntime singleton, the protobuf encoder/decoder, the function/method factories, and the Collector / BamlCtxManager observability primitives.

from baml_core import BamlRuntime

rt = BamlRuntime.initialize_runtime(
    root_path=".",
    files={"main.baml": baml_source},
    sdk_root="my_sdk",
)

This package is generally consumed indirectly via the code generated by baml-cli generate --target python — direct use is reserved for runtime authors and bridge tests.

Requirements

Python 3.10+
protobuf >= 6.31.1

License

Apache-2.0

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distributions

No source distribution files available for this release.See tutorial on generating distribution archives.

Built Distributions

If you're not sure about the file name format, learn more about wheel file names.

The dropdown lists show the available interpreters, ABIs, and platforms. Enable javascript to be able to filter the list of wheel files.

baml_core-0.12.2.dev2026061700-cp310-abi3-win_arm64.whl (7.5 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+Windows ARM64

baml_core-0.12.2.dev2026061700-cp310-abi3-win_amd64.whl (7.8 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+Windows x86-64

baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_x86_64.whl (8.0 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+musllinux: musl 1.1+ x86-64

baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_aarch64.whl (7.5 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+musllinux: musl 1.1+ ARM64

baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_24_aarch64.whl (7.3 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+manylinux: glibc 2.24+ ARM64

baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (7.8 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+manylinux: glibc 2.17+ x86-64

baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_11_0_arm64.whl (7.3 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+macOS 11.0+ ARM64

baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_10_12_x86_64.whl (7.6 MB view details)

Uploaded Jun 17, 2026 CPython 3.10+macOS 10.12+ x86-64

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-win_arm64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-win_arm64.whl
Upload date: Jun 17, 2026
Size: 7.5 MB
Tags: CPython 3.10+, Windows ARM64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-win_arm64.whl
Algorithm	Hash digest
SHA256	`bcc9d2702eab6e458ff0ba1f5eed3c0633996d4b6daa8aa9a7664bf3eb1da633`
MD5	`e7ebd01483763ae4b104a5fb13fb67bc`
BLAKE2b-256	`1aed1a39c438bd27c8d3596230d2bfc47815629b0560cf62002ae63fd83cb095`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-win_arm64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-win_arm64.whl
- Subject digest: bcc9d2702eab6e458ff0ba1f5eed3c0633996d4b6daa8aa9a7664bf3eb1da633
- Sigstore transparency entry: 1843966887
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-win_amd64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-win_amd64.whl
Upload date: Jun 17, 2026
Size: 7.8 MB
Tags: CPython 3.10+, Windows x86-64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-win_amd64.whl
Algorithm	Hash digest
SHA256	`6e6d4c57efdf31d34cd82403441dcab56e37872e4a581c4147c69965debd3d5b`
MD5	`b662ae4f197c65877946f1b813c57a24`
BLAKE2b-256	`3d8209c88584777c8475c6d368ee1b55dff45ca27deea34832302f400dfdf0ab`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-win_amd64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-win_amd64.whl
- Subject digest: 6e6d4c57efdf31d34cd82403441dcab56e37872e4a581c4147c69965debd3d5b
- Sigstore transparency entry: 1843965155
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_x86_64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_x86_64.whl
Upload date: Jun 17, 2026
Size: 8.0 MB
Tags: CPython 3.10+, musllinux: musl 1.1+ x86-64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_x86_64.whl
Algorithm	Hash digest
SHA256	`3546500fefe7a42c9634bd14b0dfc50046d890ccf48bf7c721d431ecd2bc0a4a`
MD5	`a5fe3844e8ef6339915112286cd2b25e`
BLAKE2b-256	`c7a2cb02a4b061d90612054df0fe4092b2d368516958330c573f9af08c17d917`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_x86_64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_x86_64.whl
- Subject digest: 3546500fefe7a42c9634bd14b0dfc50046d890ccf48bf7c721d431ecd2bc0a4a
- Sigstore transparency entry: 1843965063
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_aarch64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_aarch64.whl
Upload date: Jun 17, 2026
Size: 7.5 MB
Tags: CPython 3.10+, musllinux: musl 1.1+ ARM64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_aarch64.whl
Algorithm	Hash digest
SHA256	`cd78a7f29bb1efb623b4a2d0321905fc44101668bf6eef7ce98e521cdd9c22fd`
MD5	`fc198794b3bc67044999764adf32e82b`
BLAKE2b-256	`0d5183d06495df8f8404b7ae58819827dfd63e471a0623f00dca74ee4d30c940`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_aarch64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-musllinux_1_1_aarch64.whl
- Subject digest: cd78a7f29bb1efb623b4a2d0321905fc44101668bf6eef7ce98e521cdd9c22fd
- Sigstore transparency entry: 1843966499
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_24_aarch64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_24_aarch64.whl
Upload date: Jun 17, 2026
Size: 7.3 MB
Tags: CPython 3.10+, manylinux: glibc 2.24+ ARM64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_24_aarch64.whl
Algorithm	Hash digest
SHA256	`ab7a9476faac0e24941323a7e29dcaac4edc6cb18ad0123ac8ba2dcc1c1339a6`
MD5	`125d8d04bbce7e125df632e5d0077b7f`
BLAKE2b-256	`d95c8d9eb7972b61d1f752647d72209dbcd66d1822e659d5f1016b37c4c933c6`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_24_aarch64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_24_aarch64.whl
- Subject digest: ab7a9476faac0e24941323a7e29dcaac4edc6cb18ad0123ac8ba2dcc1c1339a6
- Sigstore transparency entry: 1843968182
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
Upload date: Jun 17, 2026
Size: 7.8 MB
Tags: CPython 3.10+, manylinux: glibc 2.17+ x86-64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
Algorithm	Hash digest
SHA256	`92f3bac0d922cf892227bf82459683114f18dabcab5f36d29281d48ad9f24348`
MD5	`a706d5b673a5beab4caefd7e193fba4a`
BLAKE2b-256	`e4770bc811c22d1e8f13c5db36826f1c6e765e474260362bd516e49d801896bb`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
- Subject digest: 92f3bac0d922cf892227bf82459683114f18dabcab5f36d29281d48ad9f24348
- Sigstore transparency entry: 1843966663
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_11_0_arm64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_11_0_arm64.whl
Upload date: Jun 17, 2026
Size: 7.3 MB
Tags: CPython 3.10+, macOS 11.0+ ARM64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_11_0_arm64.whl
Algorithm	Hash digest
SHA256	`cce8766787693996a3eabbe2e0f1ed1a2d42c8e2fc81a2d7ea0f4e111833304d`
MD5	`a7db5376ac9e215a6e2601d5007f85db`
BLAKE2b-256	`cc3efdd07e5e00356789627b89c650a10d6196a013227d417791486315fa7637`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_11_0_arm64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_11_0_arm64.whl
- Subject digest: cce8766787693996a3eabbe2e0f1ed1a2d42c8e2fc81a2d7ea0f4e111833304d
- Sigstore transparency entry: 1843966334
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run

File details

Details for the file baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_10_12_x86_64.whl.

File metadata

Download URL: baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_10_12_x86_64.whl
Upload date: Jun 17, 2026
Size: 7.6 MB
Tags: CPython 3.10+, macOS 10.12+ x86-64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/6.1.0 CPython/3.13.12

File hashes

Hashes for baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_10_12_x86_64.whl
Algorithm	Hash digest
SHA256	`2a5937add514d3b4ec66e516944575689b3a22fe09d3f00f1ec9dda2f7742cbb`
MD5	`26d060d7b478335232c24a8e5644dc02`
BLAKE2b-256	`a531ede9bb1a84b00901a80022031c74dd618b3e2fea388afc7a8d0f64a4cd98`

See more details on using hashes here.

Provenance

The following attestation bundles were made for baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_10_12_x86_64.whl:

Publisher: release-baml-language.yml on BoundaryML/baml

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: baml_core-0.12.2.dev2026061700-cp310-abi3-macosx_10_12_x86_64.whl
- Subject digest: 2a5937add514d3b4ec66e516944575689b3a22fe09d3f00f1ec9dda2f7742cbb
- Sigstore transparency entry: 1843965263
- Sigstore integration time: Jun 17, 2026
Source repository:
- Permalink: BoundaryML/baml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Branch / Tag: refs/heads/canary
- Owner: https://github.com/BoundaryML
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release-baml-language.yml@1581adc5cfefa47338abf8954bf3e9909e86d874
- Trigger Event: workflow_run