HN Samuellrose 4/23/2026

The Quiet Standardization of AI Agent Skills

SKILL.md file format has become de facto standard for AI agent behavior customization across Anthropic Claude, OpenAI Codex, GitHub Copilot and 20+ other agents.

HN xtiansimon 4/23/2026

Ask HN: ChatAi Sandboxing?

Discussion on sandboxing LLM tools in enterprise for non-programmers. Concerns about data security and result verification with Claude.

HN 38caveman 4/23/2026

Ombre – open-source AI infrastructure

Ombre is open-source AI infrastructure that runs locally with 8 automatic agents, addressing cost, accuracy and auditability challenges.

BL 4/23/2026

Introducing GPT-5.5

OpenAI releases GPT-5.5 with improved code writing, debugging, research, data analysis, and tool operation capabilities for multi-step workflows.

BL 4/23/2026

GPT-5.5 System Card

OpenAI releases GPT-5.5, a model for complex real-world work including code writing, online research, and tool use across applications with improved autonomy and task completion.

BL 4/23/2026

What is Codex?

Overview of Codex as autonomous AI agent designed to delegate and execute work across files, tools, and workflows.

BL 4/23/2026

Working with Codex

Codex workspace tutorial explaining sidebar menu, projects, threads, and core interface elements.

BL 4/23/2026

How to get started with Codex

Setup guide for Codex desktop app covering first project creation, threads, and basic workspace navigation.

BL 4/23/2026

Codex settings

Documentation on Codex desktop app settings including personalization, sleep prevention, and detail level controls.

BL 4/23/2026

How to use Codex for everyday work

Using ChatGPT Codex to generate business documents and briefs from existing team materials like emails, spreadsheets, and dashboards.