Haochen XuWriting about web engineering, frontend experiments, and whatever is worth understanding deeply.https://hcxu.cc/What I've Learned From Using Agents: From TUI to Workspace-as-Homehttps://hcxu.cc/posts/agent/what-ive-learned-from-using-agents/https://hcxu.cc/posts/agent/what-ive-learned-from-using-agents/Starting from NanoClaw: making agent-workspace the agent's home, taking it off my machine with opencode serve, layering memory across notes / user.md / todos.md, and the two automatic-memory approaches I tried before settling on one.Thu, 30 Jul 2026 00:00:00 GMTWhy a Few Claude Agent SDK Turns Used Up My 5-Hour Limithttps://hcxu.cc/posts/agent/understanding-claude-agent-sdk-token-usage/https://hcxu.cc/posts/agent/understanding-claude-agent-sdk-token-usage/Starting from a Gmail Bridge triggered Claude Code SDK session, this note breaks down how a few visible turns produced 44 model calls, 5.84M cumulative usage tokens, and a depleted 5-hour limit.Mon, 20 Jul 2026 00:00:00 GMTHow My Personal Agent Handles Context: Treat Context as Disposable, Memory as an Assethttps://hcxu.cc/posts/agent/how-my-agent-handles-context/https://hcxu.cc/posts/agent/how-my-agent-handles-context/Starting from a single line in AGENTS.md, here's how my always-on personal agent layers memory and context: a tiny always-loaded core, progressive disclosure, and skill routing — so I can finish a task, close the session, and start a fresh one without a second thought.Thu, 09 Jul 2026 00:00:00 GMTWhy I Added Memory to My Agent and Then Removed Ithttps://hcxu.cc/posts/agent/building-memory-for-our-opencode-agent/https://hcxu.cc/posts/agent/building-memory-for-our-opencode-agent/An engineering postmortem on building, tightening, and ultimately disabling long-term memory in my OpenCode agent.Wed, 01 Jul 2026 00:00:00 GMT🧠 What Should LLM-Facing Developers Know?https://hcxu.cc/posts/thoughts/internet-facing-vs-llm-facing-development/https://hcxu.cc/posts/thoughts/internet-facing-vs-llm-facing-development/If building for the internet was the mainstream in the past 20 years, building for LLMs might be the future. Just like how web developers don't need to know the low-le...Fri, 11 Oct 2024 00:00:00 GMTDynamoDBhttps://hcxu.cc/posts/db/dynamo-db/https://hcxu.cc/posts/db/dynamo-db/It is a key-value store like an object. Primary key It is a unique identifier for a item in a table. It is the "key" of the item. It must contain a partition key and a...Mon, 20 May 2024 00:00:00 GMT