[media-types] Media Type Registration Request: application/v nd.ai.basemodel.weights.v1.safetensors

"Mohamed Chorfa (MChorfa)" <[email protected]> Sun, 5 Jul 2026 21:07:44 -0400
Newsgroups	gmane.ietf.types
Message-ID	<[email protected]>
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> Dear IANA Media Types Review Team,
>=20
> This is a request for permanent vendor-tree registration of the
> following media type per RFC 6838.
>=20
> Registration is requested on behalf of CKODEX,
> the author and change controller of the AIPACK specification.
>=20
> A community review period is requested prior to formal registration.
>=20
> --- Registration Template ---
>=20
> Type name: application
>=20
> Subtype name: vnd.ai.basemodel.weights.v1.safetensors
>=20
> Vendor tree prefix: vnd. =E2=80=94 vendor-tree registration under the
> control of CKODEX.
>=20
> Required parameters: N/A
>=20
> Optional parameters: N/A
>=20
> Encoding considerations: binary. (Content is an opaque =
SafeTensors-format model weights file.)
>=20
> Security considerations:
> Content layers contain model weights, skill bundles, guardrail rules,
> dataset shards, or evaluation harness code. Skill bundles and =
guardrail
> rules MAY contain executable content (e.g., WASM, Python bytecode).
> Implementations MUST verify the content digest (SHA-256) matches the
> reference in the parent manifest before processing. Executable content
> MUST be sandboxed or executed within a restricted runtime.
>=20
> Interoperability considerations:
> SafeTensors is a well-documented format with cross-language libraries
> (Hugging Face, Rust, Python, C++). Other layer formats (e.g., GGUF,
> ONNX) MAY be registered separately.
>=20
> Published specification:
> - SafeTensors: https://github.com/huggingface/safetensors
> - AIPACK-SPEC =C2=A74.2, =C2=A76.1
> - Full specification: =
https://github.com/ckodex-labs/aipack-spec/blob/main/AIPACK-SPEC-0.1.md
>=20
> Applications that use this media type:
> Same as manifest media types, plus model quantization and conversion =
tools.
>=20
> Fragment identifier considerations: N/A
>=20
> Restrictions on usage: None.
>=20
> Provisional or permanent registration: Permanent vendor-tree =
registration.
>=20
> Additional information:
> - Magic number(s): SafeTensors header (8-byte little-endian length + =
JSON metadata)
> - File extension(s): .safetensors
> - Macintosh file type code(s): BINA
> - Object identifier(s): None
> - Intended usage: COMMON
>=20
> Author/Change Controller: CKODEX
> Contact: Mohamed N. Chorfa <[email protected]>
>=20
> --- End Registration Template ---
>=20
> Please confirm receipt and advise on the expected review timeline.
> We are happy to address any questions from the designated expert
> reviewer.
>=20
> Best regards,
> Mohamed N. Chorfa
> CKODEX
> [email protected]

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Dear IANA Media Types Review Team,<br><br>This is a request for =
permanent vendor-tree registration of the<br>following media type per =
RFC 6838.<br><br>Registration is requested on behalf of CKODEX,<br>the =
author and change controller of the AIPACK specification.<br><br>A =
community review period is requested prior to formal =
registration.<br><br>--- Registration Template ---<br><br>Type name: =
application<br><br>Subtype name: =
vnd.ai.basemodel.weights.v1.safetensors<br><br>Vendor tree prefix: vnd. =
=E2=80=94 vendor-tree registration under the<br>control of =
CKODEX.<br><br>Required parameters: N/A<br><br>Optional parameters: =
N/A<br><br>Encoding considerations: binary. (Content is an opaque =
SafeTensors-format model weights file.)<br><br>Security =
considerations:<br>Content layers contain model weights, skill bundles, =
guardrail rules,<br>dataset shards, or evaluation harness code. Skill =
bundles and guardrail<br>rules MAY contain executable content (e.g., =
WASM, Python bytecode).<br>Implementations MUST verify the content =
digest (SHA-256) matches the<br>reference in the parent manifest before =
processing. Executable content<br>MUST be sandboxed or executed within a =
restricted runtime.<br><br>Interoperability =
considerations:<br>SafeTensors is a well-documented format with =
cross-language libraries<br>(Hugging Face, Rust, Python, C++). Other =
layer formats (e.g., GGUF,<br>ONNX) MAY be registered =
separately.<br><br>Published specification:<br>- SafeTensors: =
https://github.com/huggingface/safetensors<br>- AIPACK-SPEC =C2=A74.2, =
=C2=A76.1<br>- Full specification: =
https://github.com/ckodex-labs/aipack-spec/blob/main/AIPACK-SPEC-0.1.md<br=
><br>Applications that use this media type:<br>Same as manifest media =
types, plus model quantization and conversion tools.<br><br>Fragment =
identifier considerations: N/A<br><br>Restrictions on usage: =
None.<br><br>Provisional or permanent registration: Permanent =
vendor-tree registration.<br><br>Additional information:<br>- Magic =
number(s): SafeTensors header (8-byte little-endian length + JSON =
metadata)<br>- File extension(s): .safetensors<br>- Macintosh file type =
code(s): BINA<br>- Object identifier(s): None<br>- Intended usage: =
COMMON<br><br>Author/Change Controller: CKODEX<br>Contact: Mohamed N. =
Chorfa &lt;[email protected]&gt;<br><br>--- End Registration Template =
---<br><br>Please confirm receipt and advise on the expected review =
timeline.<br>We are happy to address any questions from the designated =
expert<br>reviewer.<br><br>Best regards,<br>Mohamed N. =
Chorfa<br>CKODEX<br>[email protected]<br>

</blockquote></div></body></html>=

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