https://halo.xin/en/Halo XieA personal technology blog by Halo Xie about agent engineering, software systems, and open source practice. 2026-08-15T19:27:26+08:00 Halo Xie https://halo.xin/en/ Jekyll © 2026 Halo Xie /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png Agents Are a Spectrum: From Soft Routing and Tool Selection to an Autonomous Loop with Pi2026-08-13T20:10:00+08:00 2026-08-15T18:27:58+08:00 https://halo.xin/en/learn/agent-zero-to-one/agent-patterns-with-pi/ Halo Xie A practical map of Agent patterns, followed by minimal read-only examples using the Pi CLI, SDK, and Extension API Chat, Workflow, or Agent? A Beginner's Guide to Choosing the Right AI Pattern2026-08-13T20:00:00+08:00 2026-08-15T01:30:01+08:00 https://halo.xin/en/learn/agent-zero-to-one/chat-workflow-agent-guide/ Halo Xie A practical guide to Chat, Workflows, Routers, Agents, and Hybrid systems, centered on one question: who decides the next step? Securely Sync Your Development Environment with chezmoi: Auditable Dotfiles from Scratch2026-07-28T12:00:00+08:00 2026-08-15T01:30:01+08:00 https://halo.xin/en/posts/general/chezmoi-secure-dotfiles-guide/ Halo Xie Build cross-device configuration sync with chezmoi, a private GitHub repository, age, and Gitleaks while preventing plaintext SSH, database, and AI-tool credentials from entering Git When Models Start Thinking for Themselves: The Legacy Prompts Your Harness Should Retire2026-07-25T00:00:00+08:00 2026-08-15T01:30:01+08:00 https://halo.xin/en/posts/general/thinking-on-by-default/ Halo Xie After the July 2026 wave of model releases, which harness prompts have gone from helpful to harmful, which should be strengthened, and which new ones are needed Harness Engineering: A New Engineering Paradigm for the AI Agent Era2026-07-24T15:14:59+08:00 2026-08-15T01:30:01+08:00 https://halo.xin/en/posts/general/harness-engineering/ Halo Xie A systematic breakdown of Harness Engineering's core ideas, six components, OpenAI's million-line code case study, and strategic implications