Mergekit Returns To Its Roots

Mergekit, initially developed as a research tool for model merging, faced challenges with its Business Source License (BSL) which created uncertainty and slowed adoption among developers and contributors. As the project expanded its scope beyond post-training into the full model lifecycle, the team recognized the misalignment caused by having a custom license for the library while using a standard Apache-2.0 license for its models. Community feedback highlighted the need for clarity and simplicity over protectionist measures, prompting the decision to switch Mergekit's license to LGPL v3. This change, effective October 31, 2025, aims to remove licensing barriers, foster community trust, and streamline adoption by providing a consistent and permissive licensing framework across the entire pipeline. The team acknowledges the value of community input in making this transition and invites further collaboration to enhance the tool's development in an open environment.

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