AI BriefingDaily AI briefing
Editor's picks come first, followed by stories repeatedly covered across days and sources.
Top stories
05- 01
Editor's pick
Anthropic Releases Prompting Guide for Claude Opus 5.5 with Effort Calibration and Agentic UpdatesClaude Opus 5.5 defaults to 'medium' effort and requires new handling for thinking blocks and safety refusals compared to Opus 5.
Hacker News
- 02
Editor's pick
NHN Cloud Developer's Experience Building an AI Harness: There Is No Silver BulletA firsthand account of spending a month refining an AI harness to solve the problem of repetitive initialization in every AI session.
NHN Cloud
- 03Anthropic's Claude Sonnet 5.5 Now Available on AI Gateway
The model supports Zero Data Retention and integrates with the AI SDK, OpenAI-compatible APIs, and Anthropic Messages API.
Vercel Blog
- 04Cloudflare launches cf CLI to cover entire API for AI agents
The new CLI supports over 3,000 operations compared to Wrangler's ~280, with JSON as the default output format.
Cloudflare Blog
- 05H Company releases Holo4 generalist computer-use agent models
The new Holo4 models, available in 27B dense and 35B-A3B MoE sizes, interact with software across GUI, code, MCP, and API interfaces.
HuggingFace Blog
Developer tool releases
01Rising repositories and models
03- NawfalMotii79/PLFM_RADAR
Assembling a 10.5 GHz Phased Array Radar as Open Source
- cs341-illinois/coursebook
Linux System Programming: An Open-Source Textbook in C
- byoungd/up
A Learning Roadmap Proving Everything from English to Entrepreneurship in the AI Era