Blue Core, a collaboration that envisions a shared linked data environment to bring BIBFRAME cataloging to production, was introduced as the natural evolution of the Mellon Foundation-funded Linked Data for Production (LD4P) projects. In this presentation, we will discuss efforts to shift from established local copying and editing workflows to truly shared, collaborative linked data cataloging and community-based practices that can be scaled across production environments, with open data at its core. We will share our progress, and present the opportunities and challenges uncovered during the planning phases of work between 2023 and 2024. We will also present recent developments, ongoing questions, and look to the community for feedback.