Claude Fable 5.1 and Claude Mythos 5.1(anthropic.com)

1332 points by denysvitali 1 month ago | 1269 comments

Anthropic documentation page describing new features, breaking changes, and capability improvements in Claude Fable 5.1 and Claude Mythos 5.1.

Claude: System Prompts(platform.claude.com)

727 points by tosh 2 months ago | 276 comments

Anthropic documentation page listing the core system prompts used by Claude on claude.ai and its iOS and Android apps, organized by model and date.

Claude Code now supports hooks(docs.anthropic.com)

332 points by ramoz 1 year ago | 140 comments

Anthropic documentation page explaining Claude Code hooks, user-defined shell commands that run at points in Claude Code's lifecycle.

Claude Managed Agents Overview(platform.claude.com)

18 points by NicoJuicy 6 months ago | 9 comments

Claude Code SDK(docs.anthropic.com)

427 points by sync 1 year ago | 186 comments

Anthropic documentation page for the Claude Code SDK, which lets developers run Claude Code programmatically as a subprocess from their applications.

Speed up responses with fast mode(code.claude.com)

207 points by surprisetalk 8 months ago | 218 comments

Claude Advanced Tool Use(anthropic.com)

644 points by lebovic 11 months ago | 255 comments

Anthropic engineering blog post introducing three beta features on the Claude Developer Platform that let Claude discover, learn, and execute tools dynamically.

Getting the most out of Opus 5.5 in Claude and Claude Code(claude.dev)

192 points by saikatsg 22 days ago | 132 comments

A playbook blog post by Addy Osmani on prompting Claude Opus 5.5, steering long runs, and checking results in Claude apps and Claude Code.

Claude Code: Best practices for agentic coding(anthropic.com)

549 points by sqs 1 year ago | 232 comments

Anthropic engineering blog post sharing tips and best practices for using Claude Code, a command-line tool for agentic coding, across codebases and languages.

Opus 4.5 is not the normal AI agent experience that I have had thus far(burkeholland.github.io)

797 points by tbassetto 9 months ago | 1203 comments

Burke Holland's blog post arguing that Anthropic's Claude Opus 4.5 is a step change in AI coding agent experience.

GPT-5.2(openai.com)

1125 points by atgctg 10 months ago | 988 comments

OpenAI platform documentation page on using GPT-5.2, covering its improvements, features, and migration guidance for the GPT-5 model family.

Anthropic bans 'abusive or cruel behavior' towards Claude(theverge.com)

21 points by mikelgan 17 days ago | 17 comments

The Verge report on Anthropic's usage policy update banning abusive or cruel behavior toward Claude and adding rules on propaganda, surveillance, and weapons.