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W20: Bilingual Refactoring, Optimization, and Security

An engineering chronicle detailing architectural improvements, performance optimizations, XSS security mitigations, and enriched unit testing at ArceApps.

Technical Articles

Deep tutorials and guides on Android development, Kotlin and AI Agents.

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Semantic Code Search Tools for AI Coding Agents: CocoIndex Code and CodeGraph
AI May 19, 2026

Semantic Code Search Tools for AI Coding Agents: CocoIndex Code and CodeGraph

A comprehensive comparison of CocoIndex Code and CodeGraph — two AST-based semantic code search tools that dramatically reduce token consumption and accelerate code exploration for AI coding agents like Claude Code.

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Spec Kitty: Spec-Driven Development for AI Coding Agents
SDD May 19, 2026

Spec Kitty: Spec-Driven Development for AI Coding Agents

A complete guide to Spec Kitty — the CLI that turns product intent into a repeatable agent workflow using git worktrees, a 9-lane kanban system, and repository-native mission artifacts.

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OpenSpec for Mobile Development: Spec-Driven Development in Android and Kotlin
SDD May 17, 2026

OpenSpec for Mobile Development: Spec-Driven Development in Android and Kotlin

How to apply OpenSpec in Android and Kotlin projects to keep AI agents aligned with architecture, with practical examples of change proposals, task validation, and living files.

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