Sean Lu
元智資管大二。用 $0 成本的工具和自動化，把自己養活。
Sophomore in Information Management at Yuan Ze University, Taiwan. I build tools and automation that cost nothing to run, so I can support myself.
關於我About
我是 Sean，元智大學資訊管理學系大二，預計 2029 年畢業，住在桃園、學校附近。持有 Anthropic Claude 101 認證（2026 年 7 月）。校內參加閱人社和資管系排球隊。
I'm Sean, a second-year Information Management student at Yuan Ze University (元智大學) in Taiwan, graduating in 2029. I live in Taoyuan, near campus. I hold Anthropic's Claude 101 certification (July 2026). On campus I'm in the 閱人社 club and the IM department volleyball team.
正在做的事What I'm working on
- XAUUSD 裁量交易——有規則框架的裁量交易，持續把主觀邏輯量化、驗證。
- XAUUSD discretionary trading — rules-based discretionary trading, with ongoing work on quantifying and validating the subjective parts.
- 英文 X 帳號——自我成長與生活方式主題，練習英文寫作與經營受眾。@minhososerious
- An English-language X account — self-improvement and lifestyle, where I practise writing in English and growing an audience. @minhososerious
目標很直接：在家裡還支持我的這幾年，先做到經濟上自給自足。
The goal is plain: become financially self-sufficient while my family is still supporting me.
技術背景Technical background
- 課程：C#、微積分（無窮級數）、資訊安全、多媒體
- Coursework: C#, calculus (infinite series), cybersecurity, multimedia
- 實作：Python、Playwright、Shell、ffmpeg、Cloudflare Pages、TradingView Pine Script
- Hands-on: Python, Playwright, Shell, ffmpeg, Cloudflare Pages, TradingView Pine Script
- AI 工程：Claude Code 治理設計——分層 CLAUDE.md、模型調度規則、subagent 配置、以檔案為基礎的機構記憶
- AI engineering: Claude Code governance — layered CLAUDE.md files, model dispatch rules, subagent configuration, file-based institutional memory
我做東西的原則How I build
- 全部 $0。免費層、本地模型、瀏覽器端運算。
- Everything runs on $0.Free tiers, local models, browser-side compute.
- 單檔、無依賴的前端。打開就能用，不需要 build。這個網站就是一個 HTML 檔。
- Single-file, dependency-free front ends.Open it and it works. No build step. This site is one HTML file.
- 自己不用的工具，不算做完。我只信自己感受過的需求。我曾以為可以先做出來再找需求，後來發現太多東西只有我自己會用。現在只做我真的缺、缺了會去解決的東西。
- A tool I don't use myself isn't finished.I only trust demand I've felt. I used to think you could ship first and find demand later; too much of what I built turned out to be useful only to me. Now I build what I actually lack and would otherwise fix by hand.
- 有後果的自動化，一定有人工閘門。產生可以自動；發布、付款、寫入都要人點頭。
- Consequential automation always has a human gate.Generation can be automatic. Posting, paying, and writing to anything that matters needs a human to say yes.
- 最小權限，不硬編碼憑證，程式碼要能被審。
- Least privilege, no hardcoded credentials, code that can be audited.
作品Projects
考場筆記 · Personal IELTS Desk
Cloudflare Pages · Gemini · Web Speech
繁中 IELTS 自學系統——單字庫、Leitner 五盒複習、AI 模擬題、錯題本、寫作評分、每日規劃。
A Traditional-Chinese IELTS study desk — vocabulary bank, Leitner review, AI mock questions, mistake notebook, band-descriptor marking, daily planner.
- 問題
- 市面 IELTS 工具要付費、要帳號、資料不在自己手上。
- Problem
- Existing IELTS tools cost money, require an account, and keep your data.
- 解法
- 全部跑在瀏覽器。API key 存 localStorage，資料可匯出 JSON，雲端同步是選配。
- Approach
- Everything runs in the browser. The API key lives in localStorage, data exports as JSON, cloud sync is optional.
- 取捨
- 瀏覽器端呼叫 Gemini 而不是自架後端——零伺服器成本，代價是使用者要自己申請 key。Leitner 而不是 SM-2——簡單到使用者看得懂自己在哪一盒。
- Trade-offs
- Calling Gemini client-side instead of running a backend — zero server cost, at the price of users bringing their own key. Leitner instead of SM-2 — simple enough that you can see which box you're in.
- 學到
- 動態模型探索比寫死模型名稱耐用；給 Claude Code 的交接包讓後續迭代成本大幅下降。
- Learned
- Dynamic model discovery outlasts hardcoded model names. A handoff package for Claude Code made later iterations far cheaper.
vid-for-agents
Shell · ffmpeg · whisper.cpp
一行指令把任何影片變成取樣畫格 + 本地逐字稿，讓 AI coding agent 能「看」影片。
One command turns any video into sampled frames plus a local transcript, so AI coding agents can read it.
- 問題
- Agent 只能讀文字。影片教學、螢幕錄影對它們是黑盒。
- Problem
- Agents read text. Video tutorials and screen recordings are a black box to them.
- 解法
- 把影片降維成 agent 讀得懂的兩種東西：畫格和文字。
- Approach
- Reduce the video to the two things an agent can read: frames and text.
- 取捨
- 本地 whisper.cpp 而不是雲端語音辨識——慢一點，但不用 key、不上傳、$0。
- Trade-offs
- Local whisper.cpp instead of cloud speech-to-text — slower, but no key, no upload, $0.
CountAgent
Claude Code · iOS Shortcuts
跑在 Claude Code 上的個人記帳 agent。Siri 往檔案追加一行純文字，agent 之後負責解析、分類、去重。
A personal bookkeeping agent on Claude Code. Siri appends one line of plain text; the agent later parses, categorises and dedupes.
- 問題
- 記帳 app 的摩擦在輸入。開 app、選類別、填金額，三步就放棄。
- Problem
- The friction in expense apps is input. Open the app, pick a category, type the amount — three steps and you quit.
- 解法
- 輸入端只剩一句話，理解交給 agent 批次處理。
- Approach
- Input shrinks to one sentence. Understanding is handed to the agent in batches.
- 取捨
- 行為寫成自然語言 CLAUDE.md 而不是程式碼——改規則不用改 code，代價是行為不完全確定，所以保留人工審核。
- Trade-offs
- Behaviour is written as a natural-language CLAUDE.md, not code — rules change without a code change, at the price of non-determinism, so a human review step stays.
- Telegram → Groq → Obsidian 知識擷取管線——手機隨手記，自動豐富化後同步進 Obsidian，人工決定留不留。Python · GitHub Actions · iOS Shortcuts
- Telegram → Groq → Obsidian capture pipeline — jot on the phone, auto-enrich, sync into Obsidian, human decides what stays. Python · GitHub Actions · iOS Shortcuts
- Threads 影片下載器——Python 小工具。
- Threads video downloader — a small Python tool.
- 更多在 GitHub。
- More on GitHub.
這個月This month
2026 年 9 月
September 2026
- 大二開學
- Starting sophomore year
- 申請 Anthropic Claude Campus Ambassador 2026（Builder Club 軌，元智）
- Applying to Anthropic's Claude Campus Ambassador Program 2026 (Builder Club track, Yuan Ze)
- 持續交易日誌與 MAE/MFE 紀錄
- Ongoing trade journaling with MAE/MFE logging
工作之外Outside work
哲學和知識論。在乎遊戲和電影的敘事品質。理想的一天裡有我的貓。
Philosophy and epistemology. Narrative quality in games and film. My cat is part of the ideal day.
聯絡Contact
合作、專案、或只是想聊聊——直接寫信。
Collaborations, projects, or just a conversation — email works.