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Eric Tech Circle

Backend team lead & architect with 10+ years experience, full‑stack engineer, sharing insights and solo development practice.

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Latest from Eric Tech Circle

85 recent articles

Eric Tech Circle

Jul 10, 2026 · Artificial Intelligence

GPT‑5.6 Launch: Three Model Tiers, New ChatGPT & Codex Features, and How to Choose

OpenAI’s GPT‑5.6 release introduces three tiered models—Sol, Terra, and Luna—each with distinct pricing and performance trade‑offs, integrates ChatGPT Work and Codex into a unified platform, and provides detailed guidance on selecting the right tier for architecture, daily development, batch tasks, or large‑scale autonomous projects.

AI AgentsChatGPT WorkCodex

0 likes · 16 min read

GPT‑5.6 Launch: Three Model Tiers, New ChatGPT & Codex Features, and How to Choose

Eric Tech Circle

Jun 16, 2026 · Mobile Development

80+ Mini Program Review Lessons: Common Pitfalls and How to Fix Them

After more than 80 WeChat Mini Program submissions, this guide compiles the most frequent review rejections—privacy agreement gaps, content‑security failures, forced login, brand misuse, and missing test accounts—and provides concrete checklists and step‑by‑step solutions to help developers pass audits quickly and reliably.

WeChat Mini Programcontent securityguest mode

0 likes · 9 min read

80+ Mini Program Review Lessons: Common Pitfalls and How to Fix Them

Eric Tech Circle

Jun 1, 2026 · R&D Management

From a Generic ERP SaaS to a Vertical Industry System: A Practical Guide to Engineering Asset Reuse

The author recounts how they leveraged the engineering structure, common capabilities, documentation standards, and AI‑assisted workflows from an existing ERP SaaS project to build a vertical, headquarters‑partner system, highlighting the need to define boundaries, adapt business logic, and use AI for support rather than blind code copying.

AI-assisted developmentDocumentation StandardsDomain Modeling

0 likes · 13 min read

From a Generic ERP SaaS to a Vertical Industry System: A Practical Guide to Engineering Asset Reuse

Eric Tech Circle

May 26, 2026 · Artificial Intelligence

Taming Codex with AGENTS.md: Project‑Level Context Governance

When AI coding assistants like Codex are launched in a project without proper context, they often modify the wrong code, run incorrect commands, misplace files, or ignore project conventions; the article explains that this stems from missing project rules and shows how an AGENTS.md file can provide the needed guidance, improve efficiency, and avoid common pitfalls.

AGENTS.mdAI AgentsCodex

0 likes · 10 min read

Taming Codex with AGENTS.md: Project‑Level Context Governance

Eric Tech Circle

May 22, 2026 · Operations

Isolating Multiple Codex CLI Accounts on macOS Using CODEX_HOME

On macOS with zsh, you can avoid repetitive login/logout when using several Codex CLI accounts by copying the ~/.codex directory, setting distinct CODEX_HOME paths, and creating alias commands, allowing each account to maintain separate configurations, contexts, and quotas while sharing project rules via AGENTS.md.

CODEX_HOMECodex CLIMulti-Account

0 likes · 7 min read

Isolating Multiple Codex CLI Accounts on macOS Using CODEX_HOME

Eric Tech Circle

May 18, 2026 · Artificial Intelligence

Exploring Codex Mobile: Remote Control of Your Desktop from a Phone

This article walks through how OpenAI's Codex Mobile lets you monitor, command, and approve Codex desktop tasks from a smartphone, turning the phone into a remote cockpit for viewing progress, issuing new instructions, and handling approvals without needing a full IDE on the device.

AI coding assistantAutomationChatGPT Mobile

0 likes · 7 min read

Exploring Codex Mobile: Remote Control of Your Desktop from a Phone

Eric Tech Circle

May 15, 2026 · Frontend Development

A Free Markdown Formatting Tool Tailored for WeChat Public Account Authors

The author rebuilt a WeChat public‑account markdown formatter using Codex App + GPT 5.5 and Kiro IDE + Claude Opus 4.7, offering real‑time preview, one‑click inline‑style copy, multiple themes, code highlighting and mobile preview to eliminate tedious manual styling while keeping the tool completely free.

Code HighlightingEditorFrontend

0 likes · 6 min read

A Free Markdown Formatting Tool Tailored for WeChat Public Account Authors

Eric Tech Circle

Apr 20, 2026 · Backend Development

How to Seamlessly Upgrade from Spring Boot 3 to 4 with AI Assistance

This article shares a practical, AI‑assisted workflow for migrating a Spring Boot 3.5.11 project to Spring Boot 4, covering key framework upgrades, step‑by‑step migration planning, common pitfalls, maintainability tips, and verification of critical functionality.

AI-assistedBackend DevelopmentJava 17

0 likes · 11 min read

How to Seamlessly Upgrade from Spring Boot 3 to 4 with AI Assistance

Eric Tech Circle

Apr 12, 2026 · Artificial Intelligence

How to Build Reusable AI Agent Skills with Anthropic’s Skill Creator

This guide explains how to define, structure, and iterate AI Agent Skills using Anthropic's Skill Creator, covering template design, SKILL.md composition, a closed‑loop development workflow, and practical steps to turn verified methods into reusable skill assets.

AIAgent SkillsAnthropic

0 likes · 8 min read

How to Build Reusable AI Agent Skills with Anthropic’s Skill Creator

Eric Tech Circle

Mar 24, 2026 · Industry Insights

From Solo AI Experiments to Enterprise SaaS: Practical Lessons on Building a Commercial Product

The author recounts a two‑year journey from early AI demos to a fully‑featured SaaS inventory system, detailing product architecture, multi‑platform development, AI tool selection, SDD/DDD practices, Git‑based review, and the limits of current AI assistance, offering concrete guidance for engineers aiming to commercialize AI‑augmented software.

AIAI toolsDevOps

0 likes · 17 min read

From Solo AI Experiments to Enterprise SaaS: Practical Lessons on Building a Commercial Product