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title: "0.1.x (Legacy)"
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# CPEX 0.1.x (Legacy)

These pages document **CPEX 0.1.x**, the pure-Python plugin framework. They are preserved for users still on that line.

CPEX `0.2`+ is a Rust framework with a different architecture and a policy-first design centered on APL (Authorization Policy Language). The reposition is a re-architecture, not an abandonment: 0.1.x remains available on the [`0.1.x` branch](https://github.com/contextforge-org/cpex/tree/0.1.x).

If you are starting fresh or evaluating CPEX, read the [current documentation]({{< relref "/docs" >}}) instead. The concepts, APIs, and configuration below do not apply to `0.2`+.
