Tag: Claude Code
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Simon Willison’s Weblog: Vibe engineering
Source URL: https://simonwillison.net/2025/Oct/7/vibe-engineering/#atom-everything Source: Simon Willison’s Weblog Title: Vibe engineering Feedly Summary: I feel like vibe coding is pretty well established now as covering the fast, loose and irresponsible way of building software with AI – entirely prompt-driven, and with no attention paid to how the code actually works. This leaves us with a terminology…
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Simon Willison’s Weblog: Embracing the parallel coding agent lifestyle
Source URL: https://simonwillison.net/2025/Oct/5/parallel-coding-agents/ Source: Simon Willison’s Weblog Title: Embracing the parallel coding agent lifestyle Feedly Summary: For a while now I’ve been hearing from engineers who run multiple coding agents at once – firing up several Claude Code or Codex CLI instances at the same time, sometimes in the same repo, sometimes against multiple checkouts…
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Simon Willison’s Weblog: Designing agentic loops
Source URL: https://simonwillison.net/2025/Sep/30/designing-agentic-loops/ Source: Simon Willison’s Weblog Title: Designing agentic loops Feedly Summary: Coding agents like Anthropic’s Claude Code and OpenAI’s Codex CLI represent a genuine step change in how useful LLMs can be for producing working code. These agents can now directly exercise the code they are writing, correct errors, dig through existing implementation…
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Cloud Blog: Announcing Claude Sonnet 4.5 on Vertex AI
Source URL: https://cloud.google.com/blog/products/ai-machine-learning/announcing-claude-sonnet-4-5-on-vertex-ai/ Source: Cloud Blog Title: Announcing Claude Sonnet 4.5 on Vertex AI Feedly Summary: Today, we’re announcing the general availability of Claude Sonnet 4.5, Anthropic’s most intelligent model and its best-performing model for complex agents, coding, and computer use, on Vertex AI.Claude Sonnet 4.5 is built to work independently for hours, maintaining clarity…
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Simon Willison’s Weblog: Claude Sonnet 4.5 is probably the "best coding model in the world" (at least for now)
Source URL: https://simonwillison.net/2025/Sep/29/claude-sonnet-4-5/ Source: Simon Willison’s Weblog Title: Claude Sonnet 4.5 is probably the "best coding model in the world" (at least for now) Feedly Summary: Anthropic released Claude Sonnet 4.5 today, with a very bold set of claims: Claude Sonnet 4.5 is the best coding model in the world. It’s the strongest model for…
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Simon Willison’s Weblog: Cross-Agent Privilege Escalation: When Agents Free Each Other
Source URL: https://simonwillison.net/2025/Sep/24/cross-agent-privilege-escalation/ Source: Simon Willison’s Weblog Title: Cross-Agent Privilege Escalation: When Agents Free Each Other Feedly Summary: Cross-Agent Privilege Escalation: When Agents Free Each Other Here’s a clever new form of AI exploit from Johann Rehberger, who has coined the term Cross-Agent Privilege Escalation to describe an attack where multiple coding agents – GitHub…
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Simon Willison’s Weblog: CompileBench: Can AI Compile 22-year-old Code?
Source URL: https://simonwillison.net/2025/Sep/22/compilebench/ Source: Simon Willison’s Weblog Title: CompileBench: Can AI Compile 22-year-old Code? Feedly Summary: CompileBench: Can AI Compile 22-year-old Code? Interesting new LLM benchmark from Piotr Grabowski and Piotr Migdał: how well can different models handle compilation challenges such as cross-compiling gucr for ARM64 architecture? This is one of my favorite applications of…
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Simon Willison’s Weblog: httpjail
Source URL: https://simonwillison.net/2025/Sep/19/httpjail/#atom-everything Source: Simon Willison’s Weblog Title: httpjail Feedly Summary: httpjail Here’s a promising new (experimental) project in the sandboxing space from Ammar Bandukwala at Coder. httpjail provides a Rust CLI tool for running an individual process against a custom configured HTTP proxy. The initial goal is to help run coding agents like Claude…
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Simon Willison’s Weblog: I think "agent" may finally have a widely enough agreed upon definition to be useful jargon now
Source URL: https://simonwillison.net/2025/Sep/18/agents/ Source: Simon Willison’s Weblog Title: I think "agent" may finally have a widely enough agreed upon definition to be useful jargon now Feedly Summary: I’ve noticed something interesting over the past few weeks: I’ve started using the term “agent" in conversations where I don’t feel the need to then define it, roll…
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Simon Willison’s Weblog: Models can prompt now
Source URL: https://simonwillison.net/2025/Sep/14/models-can-prompt/#atom-everything Source: Simon Willison’s Weblog Title: Models can prompt now Feedly Summary: Here’s an interesting example of models incrementally improving over time: I am finding that today’s leading models are competent at writing prompts for themselves and each other. A year ago I was quite skeptical of the pattern where models are used…