Microservice Overengineering: Simplify a Small Java Platform
A practical reflection on deployment coupling, cross-service consistency, and choosing module boundaries for a small Java platform.
AI Training Plans: Evidence, Constraints, and Professional Review
Design a reviewable training-plan workflow from longitudinal records, fitness tests, historical plans, and an exercise library.
Beyond Uptime: Redis Pressure and Classroom Reliability
Measure online classroom reliability through Redis retention, ClickHouse event definitions, entry latency, and after-class archival backlog—not uptime alone.
Online Classroom: Media Failover and Courseware Fallback
A practical online classroom architecture for media failover and courseware fallback, with clear recovery boundaries for Agora, ZEGO, classroom state, and post-lesson replay.
Classroom Messaging: Ordering, Deduplication, Reconnection
Trace how regional classroom messaging keeps pages, annotations, and teacher actions consistent across delay, duplication, route failover, and student reconnection.
QLoRA: Classify Support Tickets with a Small Experiment
A small QLoRA experiment for support-ticket classification, covering configuration, observed results, and the limits of loss-based evaluation.
Transformers: Self-Attention to Decoder-Only Models
Explain self-attention, decoder-only transformer blocks, and the checks needed to connect model architecture with real inference behavior.
Text Embeddings for RAG: From Token Lookup to Retrieval
Explain how token lookup becomes a retrieval vector, then test ranking quality, encoding choices, and retrieval-model evaluation.
Reliable RAG: Document Quality, Retrieval, and Evidence
Build a support assistant around document quality, access controls, policy versions, hybrid retrieval, and citation checks.