- I build software and developer tools: file viewers, editors, converters and CLIs
- I work a lot with Spine skeletal animation and Live2D / VTuber models
- I make offline-first web tools that run entirely in your browser, so nothing you paste leaves your machine
- I am available for freelance work. See obayang.com for services and pricing
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Preview, debug and export Spine 2D animations in the browser: mix lab, skins, debug overlays, atlas unpacking, PNG / sprite sheet / WebM export.
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Hand an AI agent a few sample files and get back the format: a specification, a Kaitai Struct definition, a parser and tests, each backed by evidence.
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Finds Simplified characters, Mainland terms and encoding problems in code, docs and AI agent replies. CLI, GitHub Action and agent hooks.
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One offline tab for JSON, Regex, JWT, Diff, encoder pipelines and WebSocket debugging.
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Drop in CSV, Excel, Parquet, SQLite or a MySQL / SQL Server dump and query it with SQL, offline in the browser on DuckDB-WASM.
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Mock any API in your browser with a Service Worker, synthesize JSON Schema from samples, turn cURL into mock rules.
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Open a PSD in the browser, move, scale, rotate and group its layers, save it back. Includes a rigging check for Live2D and Spine.
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- EasyLive2D/live2d-py#149 (merged): fix a silent crash when a Live2D model's texture is missing (OpenGL backend)
- CherryHQ/cherry-studio#21954 (merged): stop CJK text files from being detected as binary
- dexie/Dexie.js#2353 (merged): ignore errors from aborted liveQuery runs after unsubscribe
- Kitware/vtk-js#3687 (merged): fix errors in the KeyboardCameraManipulator example
- holistics/dbml#1009 (merged): keep the written order of index columns when parsing
- ThatOpen/engine_components#835 (merged): type FragmentsManager.init options correctly
- ormar-orm/ormar#1865 (merged): make get() after exclude() report multiple matches
- greggman/twgl.js#246 (merged): emit declare namespace for v3, m4 and primitives in the TypeScript definitions
- pycollada/pycollada#166 (merged): drop XML comments and processing instructions when parsing COLLADA files with lxml
- dcmjs-org/dcmjs#610 (merged): format DS numbers to 16 characters instead of cutting off the exponent
- 開發軟體與開發者工具：檔案檢視器、編輯器、轉檔工具與命令列工具
- 常和 Spine 骨架動畫、Live2D／VTuber 模型打交道
- 做離線優先的網頁工具：全部在瀏覽器裡執行，貼進去的東西不會離開你的電腦
- 開放接案，服務與價格請見 obayang.com
| 專案 | 說明 |
|---|---|
| Spine Asset Inspector | 在瀏覽器檢視、除錯、匯出 Spine 動畫：混合測試、Skin 組合、除錯疊圖、圖集拆解、PNG／序列幀／WebM 匯出（線上試用） |
| hexsleuth | 讓 AI 從樣本檔推導二進位檔案格式，產出規格書、Kaitai Struct 定義、解析程式與測試（npm） |
| zhtw-guard | 找出程式碼、文件與 AI 回覆中混入的簡體字、大陸用語與編碼問題（npm） |
| Dev Workbench | 一個分頁搞定 JSON、正規表達式、JWT、文字比對、編碼轉換與 WebSocket 除錯（線上試用） |
| sqlpane | 拖進 CSV、Excel、Parquet、SQLite 或 MySQL／SQL Server 匯出檔，直接用 SQL 查詢，離線在瀏覽器執行（線上試用） |
| layerdesk | 在瀏覽器打開 PSD，拖曳、縮放、旋轉、整理圖層後存回 PSD，並檢查匯入 Live2D／Spine 前的拆件問題（線上試用） |
| Web Mock Studio | 在瀏覽器裡模擬 API、從範例反推 JSON Schema、cURL 轉模擬規則（線上試用） |
- EasyLive2D/live2d-py#149（已合併）：修正 Live2D 模型缺少貼圖時無聲閃退的問題
- CherryHQ/cherry-studio#21954（已合併）：修正中日韓文字檔被誤判為二進位檔的問題
- dexie/Dexie.js#2353（已合併）：修正 liveQuery 取消訂閱後，被中止的查詢仍丟出錯誤
- Kitware/vtk-js#3687（已合併）：修正鍵盤控制 3D 相機範例執行時報錯
- holistics/dbml#1009（已合併）：修正解析資料庫索引時欄位順序被打亂
- ThatOpen/engine_components#835（已合併）：修正 BIM 3D 引擎初始化參數的型別定義
- ormar-orm/ormar#1865（已合併）：修正 Python ORM 用排除條件查詢時，多筆結果沒有回報錯誤
- greggman/twgl.js#246（已合併）：修正 WebGL 函式庫的 TypeScript 型別定義，讓 v3、m4 等模組可以正常引用
- pycollada/pycollada#166（已合併）：修正 3D 模型格式 COLLADA 檔案含註解時讀取失敗
- dcmjs-org/dcmjs#610（已合併）：修正醫療影像 DICOM 檔案寫入小數時，科學記號的指數被截掉