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Notes from the registry
Guides, deep dives, and ecosystem notes on agent skills — how they work, how to install them in Claude Code, Codex, Copilot, and Antigravity, and how to get the most out of your AI coding agent.
Gemini 4 Argon: Google's frontier model, explained
Google DeepMind's Gemini 4 Argon: the 1M-token output limit, the vendor-reported benchmarks, Fairwind access, introductory pricing, and what developers can plan for.
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Codex Security Cloud: the four-stage pipeline and its limits
How Codex Security Cloud scans GitHub repos: the threat model, validation sandbox, remediation flow, and the limits OpenAI states itself.
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GPT-6.1 Sol for coding agents: benchmarks, pricing, and fit
GPT-6.1 Sol pricing, what the benchmark configurations actually say, where cached input changes the maths, and which agent workloads fit.
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OpenAI DevDay 2026: the 25 announcements, mapped for agent builders
All 25 OpenAI DevDay 2026 announcements from the official recap, with availability status and what each changes for an agent build.
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OpenAI dots: the permission model and what to hand off
How OpenAI dots work: Auto-review, Custom Rules, read-only background research, the steps a dot hands back, and what to delegate.
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Ultrafast and the Pro tiers: a cost-planning guide
What Ultrafast's 8x speed costs in included usage, how Pro 100, 200 and 500 differ, and the grandfathering date to check before switching.
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TypeSafe Jev: the model that answers instead of writing
Jev, the first System One model from ChatGPT co-inventor Diogo Almeida's TypeSafe: $0.042/MTok input, free output tokens, 70-500ms decisions, no hallucinated types. How it works, where it fits, and what to distrust.
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Gemini 3.8 Live & Extended Thinking: the developer's guide
Google's two new real-time voice models on the Live API: session config changes, the Extended Thinking interaction_status protocol, pricing, and the migration path from 3.1 Flash Live.
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We Must Pace the Frontier: Inside Amodei's Three-Step Plan to Slow AI
Amodei's essay asks the AI industry to slow down. The verbatim three-step plan, what Anthropic committed to, who signed on, and the pushback.
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What Are Agent Skills? The Complete Guide
Agent skills are reusable instruction packs that teach AI coding agents new workflows. How they work, how to install them in Claude Code, Codex, Copilot, and Antigravity, and how to pick good ones.
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