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20:31
2026-09-07
dev.to
developer-tools

FastMCP 3 4 migration: the breaking changes that compile

A developer migrating an MCP server and two clients from FastMCP 3 to FastMCP 4 documented several breaking changes that compile but fail at runtime. Key issues include a pip in-place upgrade leaving …

20:17
2026-09-07
dev.to
developer-tools

My AI reviewer proved the fix worked. It didn't.

A developer building a co-op car theft game in Unity 6 discovered that their AI-powered mutation testing system gave false confidence, failing to catch a real bug. The developer's three-agent loop, wh…

19:52
2026-09-07
dev.to
ai-agents

When Your Judge Can't Decide

CauterRule, an open-source sidecar tool that learns standing rules from repeated agent failures, has been released on GitHub and PyPI. A field test of the tool across four models and 394 trajectories …

19:46
2026-09-07
dev.to
artificial-intelligence

Your AI Agent Has a Memory. But It's Not Chat History

Rijul, a developer building LiveReview, an AI code review tool, explains the distinction between chat history and agent memory in AI systems. He clarifies that chat history is conversation-scoped, whi…

19:18
2026-09-07
dev.to
artificial-intelligence

What Happens When AI Agents Stop Working Alone?

A developer describes an emerging pattern in AI-assisted software development where a powerful frontier model creates an implementation plan and a smaller, local coding model executes it. This separat…

19:16
2026-09-07
dev.to
developer-tools

Two Kinds of Memory

A developer introduced virage, a new tool that creates a searchable vector index of a codebase, complementing the previously released kms tool for capturing curated decisions. Virage uses AST-aware ch…

18:20
2026-09-07
dev.to
artificial-intelligence

Why AI-Generated Code Still Needs Human Developers

A developer argues that AI-generated code still requires human developers because writing code is only one part of software development. The article highlights that while AI tools can generate functio…

18:15
2026-09-07
dev.to
ai-tools

AI Coding Assistants List 2026: Top Tools, Prices & Guide

A 2026 guide to AI coding assistants reports that 72% of developers now use them daily, with GitHub Copilot remaining the benchmark at $19/month despite enterprise security concerns. The guide highlig…

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