#Systems Design

AI Gateway: From Backend Scheduling to Cost Governance

Using multi-backend model access as the setting, this article explains how an AI Gateway handles resource scheduling, capacity control, failure switching, distributed state, usage accounting, and enterprise cost governance.

Short

16 min read

Part of the column “Technical Systems” · Chapter 9

• #AI
• #Architecture
• #Systems Design

Keeping Differences at the Configuration Layer: Architecture for a Multi-Domain Platform

Content, search, commerce, and growth systems repeatedly face the same challenge across multiple countries, industries, and scenarios: how to reuse stable capabilities while keeping business expressions distinct. How should boundaries be drawn between configuration, protocols, components, and orchestration?

Short

12 min read

Part of the column “Technical Systems” · Chapter 8

• #Architecture
• #Systems Design
• #Technical Planning

Where Exactly Is the Cache? Locality in a Multi-Layer Execution Service

Using a multi-layer execution service as an example, this article breaks down the multiple levels of locality across request identity, edge routing, execution resources, and backend caches, then presents reusable approaches to routing, invalidation, failover, and observability.

Short

13 min read

Part of the column “Technical Systems” · Chapter 7

• #Performance
• #Systems Design
• #Algorithms

From One Request to a Multi-Node Execution System: How the Architecture Evolves

Starting from the fault structure of a multi-node execution system, this article reviews how requests, state, storage, performance, and failures gradually cross boundaries, and discusses how the next architecture should be reorganized.

Short

19 min read

Part of the column “Technical Systems” · Chapter 6

• #Systems Design
• #Architecture
• #Distributed Work

A Data Center Is Not a Report: From Data Production to Business Judgment

Starting from the different questions asked by analysis, operations, and engineering, this article organizes how a data center for a multi-source business platform should divide Tabs, define metrics, structure read and write paths, and handle billing, reconciliation, growth, and cost.

Short

22 min read

• #Data
• #Metrics
• #Systems Design

How a Marketing Campaign Becomes a Growth System: From Transaction Facts to Auditable Entitlements

Starting with referral rewards and transaction systems, this article designs reusable, auditable marketing infrastructure across campaigns, audiences, entitlements, budgets, attribution, risk, experimentation, messaging, and measurement.

Case

16 min read

• #Systems Design
• #Risk Management
• #Anti-Scam

AI Does Not Automatically Create Productivity: From Local Acceleration to System Value

Starting from a multi-system integration experience, this essay distinguishes creation, task efficiency, organizational productivity, and business value—and asks where value and cost actually come from when AI enters a complex system.

Short

5 min read

Part of the column “Engineering & AI Judgment” · Chapter 10

• #AI
• #Developer Productivity
• #Systems

Making an Agent a Collaborable Object: State, Feedback, and Result Confirmation

Based on ChatLab design work, this paper records how presence, response, waiting, and delivery patterns from human collaboration can make Agent runtime states easier to understand; it is an HCI design observation about feedback, evidence, intervention, and result confirmation.

13 min read

Shared Core and Local Variation: How Multi-Region Systems Evolve

A multi-region system can neither cram every difference into a single core nor rebuild everything for each region. The key is to identify stable boundaries, preserve extension points, and clarify module ownership.

Short

3 min read

Part of the column “Technical Systems” · Chapter 4

• #Architecture
• #Engineering
• #Systems Design