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Dev.to

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09:00
2026-07-12
dev.to
ai-agents

When an agent can prove it is Claude

Cloudflare has launched a signed agent program that allows AI agents to prove their identity via cryptographic signatures, addressing the problem of verifying which agent is accessing a site. The Web …

08:54
2026-07-12
dev.to
large-language-models

Day 2/30: LLM Tool Calls

A developer integrated the Model Context Protocol (MCP) and LangGraph to enable a large language model (LLM) to make tool calls from scratch, giving it the ability to interact with external services w…

08:25
2026-07-12
dev.to
ai-agents

Day 1/30: ReAct Pattern Explained

A developer building a customer support bot encountered context loss issues and adopted the ReAct pattern to maintain conversation state. The pattern, implemented with LangGraph and MCP, uses Reasonin…

08:14
2026-07-12
dev.to
artificial-intelligence

I built a two-way AI voice interview simulator for developers

A developer built DevPrep.app, a two-way AI voice interview simulator that asks questions aloud, listens to spoken answers, provides feedback, and asks follow-up questions. The tool includes over 500 …

07:54
2026-07-12
dev.to
large-language-models

Cut your LLM bill by 30 to 70%: the levers that work

A developer reports that LLM bills can be cut by 30 to 70% without degrading quality by addressing token waste. Key levers include caching near-duplicate calls and routing requests to the cheapest cap…

07:53
2026-07-12
dev.to
developer-tools

The Math Behind a Typing Game's Rank System

TypeClash's Solo Ranked mode uses a points system based on expected WPM per tier, with an accuracy modifier that penalizes players below 80% accuracy even if they exceed speed expectations. The system…

07:50
2026-07-12
dev.to
developer-tools

Part 1: Authentication Hell: Getting AWS Lambda Talking to X

A developer building an autonomous Wizarding World content engine on AWS Lambda encountered authentication challenges with the X API. After struggling with OAuth 2.0 Bearer Token and OAuth 2.0 User Co…

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