# Posts, page 3

> Short posts from Anthus on what shipped, what we read, and what changed in AI this week.

- [Skills are procedures, not tools](https://anth.us/articles/agent-skills/index.md): Anthropic's Agent Skills are folders of instructions, scripts, and resources the model loads when the job matches. That is a procedure pack, not another API. (2025-10-16)
- [The loop found a better matrix multiply](https://anth.us/articles/alphaevolve/index.md): DeepMind's AlphaEvolve evolves programs against an automatic grader. It found a 4x4 matrix multiply with 48 multiplications, and shipped heuristics inside Google. (2025-05-14)
- [Task horizon is the metric that maps to work](https://anth.us/articles/metr-time-horizon/index.md): METR measures agents by the length of task they can finish, in human hours. That horizon has been doubling about every seven months. (2025-03-19)
- [The terminal is the agent runtime](https://anth.us/articles/claude-code/index.md): Claude Code is a research-preview CLI that reads the repo, edits files, and runs the shell. The agent is no longer a chat sidebar. It is a process in the project. (2025-02-24)
- [A vending machine is a long-horizon eval](https://anth.us/articles/vending-bench/index.md): Vending-Bench asks an agent to run a snack machine for a long time. The hard part is not stocking. It is staying coherent after the twentieth day. (2025-02-20)
- [Boosting Productivity: SuperWhisper + Cursor Composer](https://anth.us/articles/superwhisper-cursor-productivity/index.md): Voice-driven development with SuperWhisper and Cursor transforms coding into high-level system design, enabling true parallel development streams (2025-02-03)
- [Anthropic's Citations API: A Step Forward for AI Agent Explainability](https://anth.us/articles/anthropic-citations-api/index.md): Anthropic's new Citations API enables Claude to provide precise citations for its responses, opening new possibilities for verifiable AI agent systems. (2025-01-24)
- [Perplexity Sonar API: Research Agents as a Service](https://anth.us/articles/perplexity-sonar-api/index.md): Perplexity launches Sonar API, packaging their research agent capabilities as a model-like service, following a growing trend of agent-based workflows behind APIs. (2025-01-21)

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