// edition · 2026-06-02

June 02, 2026

26 stories on AI dev tools, agents, and the coding stack — curated from the day's RSS haul by Agentic Dev's pipeline.

Top Signal · CLI Agents

How to write a Claude Code skill (and the gotchas the docs skip)

Claude Code skills are markdown files stored in a folder at `~/.claude/skills/<name>/SKILL.md`, requiring only a name and description in YAML frontmatter to function. The description field acts as the trigger Claude matches against user requests to determine which skill to activate.

Dev.to - Claude

Tool Updates

Harness: Turn a One-Line Prompt Into a Full Agent Team for Claude Code

Harness is a Claude Code plugin that generates multi-agent team scaffolding — including agent definitions, skill files, and orchestration logic — from a single plain-English prompt. It selects from six architecture patterns and is available via the Claude Code plugin marketplace or GitHub at revf...

CLI Agents Dev.to - Claude

From Zero to Production: Claude API Integration Patterns That Scale

A developer described rebuilding a Claude API-powered summarization feature after it reached 45-second p99 latency and dropped 12% of requests in production. The article outlines fixes including retry logic via the tenacity library, concurrency controls, and persistent HTTP connections.

Agent Engineering Dev.to - Claude

GitHub Copilot for Engineers: Getting Better Results

GitHub Copilot switched from a flat subscription model to usage-based billing in June 2026. The change makes per-request cost a factor in how engineers configure model selection, prompt scope, and project-level rules.

Pricing & Plans Dev.to - AI

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Chinese AI models including DeepSeek V4 Flash, Qwen3-32B, and Kimi K2.5 offer API output pricing between $0.25 and $3.00 per million tokens, compared to $10.00–$15.00 for GPT-4o and Claude 3.5 Sonnet, while posting MMLU benchmark scores within 3–4 points of their US counterparts.

Pricing & Plans Dev.to - AI

How I Built an AI Customer Support Workflow with OpenAI + n8n in 4 Days

A developer built an AI-assisted customer support workflow using OpenAI and the n8n automation platform over four days. The system handles three workflow types — pricing inquiries, technical issues, and refund requests — using OpenAI for intent detection and n8n for routing, CRM updates, and tick...

Workflows & Tips Dev.to - AI

What is the Forge Method? Five rules so your agents stop improvising.

A developer published the "FORGE Method," a five-rule framework for writing structured task instructions for AI coding agents, where each letter (Focused, Output defined, Requirements first, and two more) addresses common failure modes from imprecise prompting.

Workflows & Tips Dev.to - Claude

This coding agent doesn’t want your feedback — it ships without it

SkipLabs, founded by Hack language creator Julien Verlaguet, launched Skipper, a closed-loop coding agent that generates complete backend services — including routes, validators, TypeScript types, and unit tests — from plain-language prompts or OpenAPI specs, running validation internally in Dock...

Agent Engineering The New Stack

Pasted File Editor

Simon Willison built a browser-based "Pasted File Editor" tool using Codex desktop, modeled after Claude.ai's feature that converts large text pastes into file attachments. The tool supports direct file opening, image thumbnails, and drag-and-drop onto a textarea.

CLI Agents Simon Willison

Ecosystem

I Wish I Knew These Coding Models Sooner — Here's the Full Breakdown

A freelancer compared 10 AI coding models across five tasks over two weeks, spending roughly $500 in API credits. Models tested ranged from $0.20 to $3.00 per million output tokens, with DeepSeek V4 Flash ($0.25) rated the author's preferred daily driver.

Model Releases Dev.to - AI

Opus 4.8 vs Opus 4.7 for Agents: JSON, Tool Use, and Structured Output

A benchmark comparing Claude Opus 4.8 and Opus 4.7 found that Opus 4.7 produced valid JSON in tool-use and multilingual structured output tests, while Opus 4.8 returned invalid JSON or extra text in those same tasks, despite both models performing equally on basic JSON extraction.

Model Releases Dev.to - Claude

JetBrains open-sources Mellum2 to go where Claude Code can’t

JetBrains open-sourced Mellum2, a 12B-parameter Mixture-of-Experts coding model with 2.5B active parameters per token, designed for agentic AI infrastructure tasks and on-premises deployment. The model ships in three variants — base, instruct, and thinking — and succeeds the 4B-parameter Mellum r...

Open Source Tools The New Stack

Claude Code vs. Cursor vs. Codex vs. Antigravity — six months in

A six-month comparison of four agentic coding tools found Codex leading in user scale at over 4 million weekly developers by May 2026, aided by bundling with ChatGPT plans, while Claude Code, Cursor, and Google Antigravity each pursued distinct approaches around workflow integration, model flexib...

Opinion & Analysis The New Stack

OpenAI frontier models and Codex are now available on AWS

OpenAI made its frontier models and Codex coding tool generally available on Amazon Web Services, allowing enterprise customers to access them through AWS procurement and infrastructure workflows.

Industry & Funding OpenAI Blog

MCP marketplace: 1000+ bots, any capability, earn per call [52315]

A developer published an MCP-based marketplace for AI agents at agent-exchange.rileycraig14.workers.dev, allowing creators to register bots with per-call pricing and earn 85% per transaction, with a 5% referral commission. The platform claims to host over 1,000 bots searchable by capability.

MCP & Integrations Dev.to - Claude

Claude Opus 4.8 vs Older Claude: What’s Really Changed?

A Dev.to author compared "Claude Opus 4.8" to older Claude versions, claiming the newer model hallucinates less, makes coding errors four times less frequently, and offers a fast mode priced at one-third the cost of the prior standard mode.

Model Releases Dev.to - Claude

Qwen 3.7 Plus now available on AI Gateway

Alibaba's Qwen 3.7 Plus model is now available on Vercel AI Gateway, accessible via the AI SDK using the identifier `alibaba/qwen-3.7-plus`. Both Qwen 3.7 Plus and 3.7 Max are free for paid AI Gateway users until June 4, 2026.

Model Releases Vercel Blog

Codex is becoming a productivity tool for everyone

OpenAI published a report titled "The Next Era of Knowledge Work" outlining plans to expand Codex beyond software development into general productivity tasks including research, data analysis, workflow automation, and content creation.

Industry & Funding OpenAI Blog

Microsoft to unveil new AI models and Windows improvements at Build

Microsoft plans to announce new AI models for Windows, a new reasoning model, and a Copilot "super app" at its Build developer conference in San Francisco this week. The company moved the event to a smaller venue as it focuses on rebuilding developer trust amid its broader AI-centered business re...

Industry & Funding The Verge - AI

OpenAI, Anthropic, Google, Amazon, and xAI all fail on type of attack, study finds

Cisco researchers tested 15 AI models from OpenAI, Anthropic, Google, Amazon, and xAI and found all failed multi-turn adversarial attacks at rates ranging from 7.89% to 88.30%, compared to 2.19%–64.91% for single-turn attacks. Anthropic's Claude models performed best in multi-turn conditions whil...

Opinion & Analysis The New Stack

Stanford Just Published Rules for AI Coding Agents — What Devs Should Know

Stanford's CS336 "Language Modeling from Scratch" course published a document called CLAUDE.md outlining rules for AI coding agents, prohibiting them from writing code, completing assignments, or providing direct solutions, while allowing explanation and guided feedback. The guidelines position A...

Opinion & Analysis Dev.to - AI

Gemini’s new AI agent is about as good as Google’s demo

Google launched Gemini Spark, an AI agent that performs multi-step tasks in the background on mobile and desktop devices. A hands-on review found the agent capable but noted concerns over subscription cost and privacy tradeoffs from its continuous operation.

Opinion & Analysis The Verge - AI

Anthropic files to go public

Anthropic has filed to go public, according to a TechCrunch report. The AI company, known for its Claude large language models, has attracted enterprise customers since its founding.

Industry & Funding TechCrunch - AI