AGENTS

GPT-5.5 and 5.5 Pro hit the API on April 24. Here is what changes for builders: pricing, agentic tasks, tool-use, and the real benchmarks I ran the day it dropped.

Vercel just declared the agent stack: AI Gateway, Sandbox, Flags, and Microfrontends. Here is how the four primitives compose, with code, and where each one actually fits in a real product.

Durable execution lands on Vercel. What it means for agents, long-running flows, and indie dev stacks - with code, gotchas, and where it fits the agent stack.

Agent runs are opaque. TraceTrail turns a Claude Code JSONL into a public share link with a stepped timeline of messages, tool calls, and tokens.

The second half of our agent tooling release: distribution, validation, and ergonomics layered on top of the first six. Six small CLIs, one through-line.

DeepSeek's reasoning-first model built for agents. First model to integrate thinking directly into tool use. Ships alongside V3.2-Speciale, which rivals GPT-5 and Gemini 3.0 Pro.

Self-healing browser automation harness that lets LLMs complete any browser task. 5,000+ stars in under a week.

Headless browser built in Rust for controlled AI-agent browser tasks. Lighter and faster than Chromium-based alternatives.

Define custom subagent types within your project's memory layer.

Spawn isolated workers with independent context windows.

Researcher, auditor, reviewer, and other ready-made subagent types.

Route specific MCP servers only to specific subagents.

Continue a subagent's work across sessions.

Fire when subagents spawn and finish.

Spawn subagents to handle complex hook logic.

One dev, one CLI, 24 subdomains, and a lot of parallel agents. The playbook for shipping an AI app portfolio.

AI coding platform built for large, complex codebases. Context Engine indexes 500K+ files across repos with 100ms retrieval. Intent desktop app orchestrates parallel agents.

Open-source terminal coding agent from Moonshot AI. Powered by Kimi K2.5 (1T params, 32B active). 256K context window. Agent Swarm runs up to 100 parallel sub-agents.

Factory AI's terminal coding agent. Runs Anthropic and OpenAI models in one subscription. Handles full tasks end-to-end - refactors, incident response, migrations.

Multi-agent orchestration framework built on the OpenAI Agents SDK. Define agent roles, typed tools, and directional communication flows. Production-focused, open-source.