Version confused！Why v2.0.0-beta first, and then v1.9.0 later?

[jxplus]

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as the title descibe.

[dosubot[bot]]

Hi @jxplus! I'm Dosu and I’m helping the dify team.

The reason you see v2.0.0-beta released before v1.9.0 is because v2.0.0-beta is a pre-release version for testing major architectural changes (like a new queue-based graph engine, knowledge pipeline updates, and a refactored plugin system), while v1.9.0 continues the stable 1.x line. This is a common practice: projects often release beta versions of a future major release for early adopters and feedback, while still maintaining and updating the current stable series for production use. The official 2.0.0 stable release hasn't been published yet—1.9.0 is still the latest stable version, and the 2.0.0-beta versions are for testing new features before the stable 2.0.0 release is finalized. The team is maintaining both in parallel by design, not by mistake.
Reference 1 | Reference 2

To reply, just mention @dosu.

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[jxplus]

But，v1.9.0 has all the feature of v2.0.0(like a new queue-based graph engine, knowledge pipeline updates)

[dosubot[bot]]

Most of the major features you mentioned—like the queue-based graph engine and knowledge pipeline—are indeed present and production-ready in v1.9.0, as confirmed by the codebase and merged PRs (queue-based graph engine, knowledge pipeline). However, v2.0.0-beta introduces deeper architectural changes, refactoring, and modularization for scalability and robustness. For example, some features in v1.9.0 (like Q&A knowledge base transformation) are still incomplete or gated by feature flags, and parallel execution bugs/regressions were fixed in later updates (reference, reference).

So while the visible feature set is similar, v2.0.0-beta is designed to be more robust and future-proof, with improvements under the hood that go beyond what’s in 1.9.0.

To reply, just mention @dosu.

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[jxplus]

Okay, I see. Thanks!