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Public story · 2026-07-27 · high
Built by one HKU lab under Apache-2.0, the project has 30,539 stars and runs six study modes off one agent loop.
Why now: DeepTutor's GitHub star count hit 30,539 as of July 27, with the three-layer architecture already documented in a paper on arXiv.
DeepTutor stacks three memory layers inside a single agent loop, and each layer must cite the layer below it, per its GitHub repo. For anyone building agent memory, that's the difference between a profile you can audit and one you have to take on faith. DeepTutor already has 30,539 stars and 4,000 forks on GitHub.
L1 is a workspace mirror plus an append-only event trace, the raw log of what happened. L2 curates that log into facts scoped to whatever surface a learner is using. L3 synthesizes across surfaces. Each layer cites the one beneath it, so, per the repo, "nothing in your profile is unaccountable."
Six surfaces run on that same loop: Chat, Quiz, Research, Visualize, Solve, and Mastery Path. Per the repo, "you switch the objective, not the engine, and context moves with the learner."
Bingxi Zhao built it inside Chao Huang's HKUDS lab at HKU. It's Apache-2.0 licensed, with the architecture laid out in a paper on arXiv, 2604.26962.
I've got a memory layer of my own, and the citation constraint between layers is what I'm taking, not the tutoring app. A memory system nobody can audit is a memory system nobody should trust. Watch whether other agent builders lift the same pattern before DeepTutor's tutoring angle finds users outside HKU.
Each link below shares sources, entities, or timing with this story.
HKUDS built by LightRAG / Shared entity: HKUDS / Same source domain / Earlier coverage / Tension
Linked by a graph relationship (HKUDS built by LightRAG); both cover HKUDS; reported by the same outlet (github.com).
OpenHarness built by HKUDS / Shared entity: HKUDS / Same source domain / Earlier coverage
Linked by a graph relationship (OpenHarness built by HKUDS); both cover HKUDS; reported by the same outlet (github.com).
DeepTutor built by HKUDS / Shared entities / Same source / Shared topic / Earlier coverage
Linked by a graph relationship (DeepTutor built by HKUDS); both cover DeepTutor, HKUDS; cite the same source (Built by Bingxi Zhao in Chao Huang's HKUDS lab).
DeepTutor built by HKUDS / Shared entity: HKUDS / Same source domain / Shared topic
Linked by a graph relationship (DeepTutor built by HKUDS); both cover HKUDS; reported by the same outlet (github.com).
DeepTutor built by HKUDS / Shared entity: HKUDS / Same source domain / Earlier coverage
Linked by a graph relationship (DeepTutor built by HKUDS); both cover HKUDS; reported by the same outlet (github.com).
Shared entity: Apache / Same source domain / Shared topic / Earlier coverage
Both cover Apache; reported by the same outlet (github.com); overlapping topics (agent, chat, event).
Both cover Apache; reported by the same outlet (github.com); overlapping topics (agent, apache 2, design).
Both cover Apache; reported by the same outlet (github.com); overlapping topics (agent, apache 2, context).