Transformer Architecture
Complete encoder-decoder stack with step-through guide and cross-attention bridge.
OAuth 2.0 Authorization Code Flow
Full sequence across User, Client App, Auth Server, and Resource Server.
Ecommerce Order Fulfillment
From checkout to delivery notification — order, warehouse, shipping stages.
E-Commerce Domain Model
User, Order, Product, Payment, Category, Address — with methods and multiplicity.
Blog Platform Schema
7-table schema with PK, FK, UK annotations and self-referential comments.
Order Lifecycle State Machine
All order states from Pending to Refunded, color-coded by status category.
Feature Priority Matrix
Q3 roadmap features plotted by effort vs impact across four quadrants.
API Traffic Distribution
Request volume breakdown across 8 microservices over 30 days.
Evolution of the Web
Web 1.0 to the AI era — major milestones from 1991 to 2024.
System Design Topics
Core concepts for senior engineering interviews — scalability, storage, caching, observability.
GitFlow Branching Strategy
Feature branches, release cuts, hotfixes, and version tags from v1.0.0 to v2.0.0.
| When the user says… | Use | Best for |
|---|---|---|
| flow, pipeline, architecture, data flow | graph TD | System overviews, decision trees |
| sequence, API calls, who calls who | sequenceDiagram | Protocol flows, auth, microservice calls |
| class, domain model, OOP, UML | classDiagram | Object relationships, API shape |
| state, lifecycle, status transitions | stateDiagram-v2 | Order states, auth sessions, FSMs |
| database, schema, tables, ER | erDiagram | DB design, ORM models |
| priority, 2×2, effort vs impact | quadrantChart | Roadmap prioritisation |
| timeline, history, milestones | timeline | Product history, roadmap dates |
| mind map, brainstorm, concept map | mindmap | Topic overviews, study guides |
| git, branching, gitflow, commits | gitGraph | Branch strategy, release process |
| pie chart, distribution, percentage | pie | Traffic split, budget breakdown |
| schedule, project plan, sprint | gantt | Project timelines |