> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cosvec.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Python clients for the CosVec AI API

<a id="changelog" />

<h2 id="v070-2026-09-18">
  v0.7.0 (2026-09-18)
</h2>

<h3 id="breaking-changes">
  Breaking Changes
</h3>

* ser/de library has been changed from `msgspec` to `pydantic`

<h3 id="bug-fixes">
  Bug fixes
</h3>

* `str` subclasses are now correctly serialized as strings instead of lists of characters

<h3 id="features">
  Features
</h3>

* the `system_one` method now accepts a new `response_model` argument that can be set to a desired `pydantic` model for additional *type-safety*

<h2 id="v060-2026-09-15">
  v0.6.0 (2026-09-15)
</h2>

<h3 id="breaking-changes_1">
  Breaking Changes
</h3>

* accept `Score.criteria` as an ordered sequence instead of a dictionary keyed by integers

<h3 id="features_1">
  Features
</h3>

* improve type annotations on SDK inputs to accept abstract types like `Mapping` and `Sequence`
* improve error messages to include http details and metadata

<h3 id="bug-fixes_1">
  Bug fixes
</h3>

* handle invalid values in `RetryPolicy`
* make exceptions and responses picklable

<h3 id="documentation">
  Documentation
</h3>

* link more concepts from main [docs](/en/)

<h2 id="v057-2026-09-14">
  v0.5.7 (2026-09-14)
</h2>

This is the initial public release of CosVec Python SDK. Learn more in the [documentation](/en/sdk/python).