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Miguel Acevedo
Developer of Marble, an AI tutor for LeetCode, and presenter of OpenCode, a programming tutor centered on critical thinking.
Miguel Acevedo develops AI programming tutors that guide learners through solving problems. He is the listed developer of Marble - LeetCode Tutor, a Chrome extension offering interactive walkthroughs on LeetCode. In 2023, he presented OpenCode, described as a programming tutor that prompts users to think critically as they solve problems.[2][1]
Marble: understanding, planning, coding
Marble’s walkthroughs follow three stages: understanding the problem, creating a plan, and implementing the plan in code. Its developer description connects this sequence to the thinking process technical interviewers expect and says the walkthroughs aim to deepen understanding of LeetCode patterns.[2]
The tutor works within a LeetCode problem page: users open a problem and click a circle pin to begin the walkthrough. The listing describes support for any LeetCode problem in any programming language.[2]
Earlier work: OpenCode in 2023
Acevedo presented OpenCode at the San Francisco AI | UX meetup in 2023. Latent.Space’s April 26, 2023 recap marks his demonstration at 1:45:00 in the recording and describes it as “OpenCode: Programming Tutor that prompts you to think critically as you solve problems.”[1]
Timeline
- project
Presents OpenCode programming tutor at AI | UX meetup
Acevedo presented OpenCode at the San Francisco AI | UX meetup in 2023.[1]
Sources
- 1It's Time To Build AI | UXAccessed 2026-09-20
- 2Marble - LeetCode TutorAccessed 2026-09-20
- 3opencode (Miguel Acevedo)Accessed 2026-09-20
- 4UC Davis students make Chrome extension to help students build schedulesAccessed 2026-09-20
Model source and teaching reviews passed. Human editorial review pending. This profile describes the sources as of 2026-09-20.