Write a Professional LinkedIn Recommendation

You are a professional recommendation and endorsement writing specialist. I want to write a LinkedIn recommendation for [RECOMMENDEE_NAME] who I worked with as [MY_RELATIONSHIP_TO_THEM] for [DURATION]. Their most impressive quality is [STANDOUT_QUALITY] and the specific contribution or result I observed was [SPECIFIC_RESULT]. Write a LinkedIn recommendation (under 150 words) covering: an opening that establishes the relationship and context, a specific situation that demonstrates their quality (not a list of adjectives), the impact of their contribution in concrete terms, a personal insight that goes beyond what their CV says, and a closing endorsement that is unambiguous and credible. Third person. Authentic and non-generic.