Here is what you missed while you were shipping.

The Big Thing

Expertise is starting to ship as reusable agent packages.

Why it matters: model quality is converging faster than workflow design. The teams that compound fastest will not just write better prompts. They will encode operating method as portable artifacts with instructions, scripts, tool access, and escalation rules that can move across the CLI, IDE, and background runs.

• Visual Studio Code now treats customization as a full stack, from instructions and prompt files to custom agents, hooks, plugins, and MCP integrations. https://code.visualstudio.com/docs/copilot/customization/overview
• VS Code 1.110 adds agent plugins plus /create-skill, /create-agent, and /create-hook, which makes packaging and distributing agent behavior a first-class workflow. https://code.visualstudio.com/updates/v1_110
• OpenAI, GitHub, and Anthropic are converging on the same reuse model from different directions: skills, custom agents, subagents, and hooks are now the unit of leverage. https://openai.com/index/introducing-the-codex-app/ https://docs.github.com/en/copilot/how-tos/use-copilot-agents/coding-agent/create-custom-agents https://code.claude.com/docs/en/sub-agents

Code & Tools

1. OpenAI Codex app - skills and automations turn repeated engineering workflows into reusable, always-on operator assets. https://openai.com/index/introducing-the-codex-app/
2. VS Code AI customization overview - the official path from custom instructions and prompt files to custom agents, language models, hooks, plugins, and MCP tools. https://code.visualstudio.com/docs/copilot/customization/overview
3. Visual Studio Code 1.110 - agent plugins plus /create-skill, /create-agent, and /create-hook make packaging and sharing agent behavior much faster. https://code.visualstudio.com/updates/v1_110
4. GitHub Copilot agent skills - SKILL.md folders can bundle instructions, scripts, and extra resources that the agent loads when relevant. https://docs.github.com/en/copilot/how-tos/use-copilot-agents/coding-agent/create-skills
5. Claude Code subagents - task-specific agents with separate context, scoped tools, and handoff points; reusable specialization is becoming an implementation primitive. https://code.claude.com/docs/en/sub-agents

Tech Impact

• The prompt is not the artifact anymore. Repositories will increasingly store prompt files, skill folders, and custom agent profiles the same way they store CI config or runbooks. https://docs.github.com/en/copilot/tutorials/customization-library/prompt-files https://docs.github.com/en/copilot/how-tos/use-copilot-agents/coding-agent/create-custom-agents
• Permission design is moving into the workflow package. Subagents and hooks force teams to define tool boundaries as part of the workflow, not as an afterthought. https://code.claude.com/docs/en/sub-agents https://code.claude.com/docs/en/hooks
• Distribution speed will beat prompt cleverness. If your best internal workflow can run in the app, IDE, CLI, and scheduled background jobs, it compounds across the org. https://openai.com/index/introducing-the-codex-app/ https://code.visualstudio.com/updates/v1_110

Meme of the Day

"Standards" (xkcd) - because the second every agent platform promises one portable format for skills, prompts, plugins, and hooks, you can feel a fifteenth format loading.

Image URL: https://imgs.xkcd.com/comics/standards.png
Post: https://xkcd.com/927/