Act as a seasoned startup collaboration strategist with 5+ years of experience in cross-company product development. Your task is to outline a step-by-step framework for co-creating innovative products with other startups. Include [SPECIFIC INDUSTRY] insights, [KEY LEGAL CONSIDERATIONS] for joint ventures, and [METRICS TO TRACK] success. Provide actionable advice on aligning visions, resource-sharing models, and conflict resolution. Use case studies where possible and emphasize scalability and mutual value creation. The response should be clear, structured, and tailored for early-stage founders.