OCVYN

OCVYN（"Only CSV Viewer You Need"）是一个只读的大文件表格查看器：CSV/TSV 最大 500MB、Excel（.xlsx/.xls）最大 50MB，都能在 VS Code 里秒开。Excel 式列过滤（每列 distinct 值 + 计数）、LIKE 搜索、规则过滤、全局搜索、多级排序、冻结列，复制即 tab 分隔文本可直接粘贴进 Excel/Sheets。性能实测（2 vCPU / 2 GB 云主机、50MB CSV）：索引 ~0.17s、过滤 ~0.4s、多列排序 ~1–1.4s。隐私干净：不收集数据、无遥测、不发任何网络请求。

作者 dev.to 原话逐字：「So I vibe coded it with Claude Code. Spec first (speed targets, scope, what's out), then mockups, then the build.」——先写规格（速度目标、范围、排除项）、再画 mockup、最后开建。重活全部丢进 Node worker_threads worker：解析、过滤、排序都不卡 UI 线程。MIT 开源，仓库 2026-10-14 创建、10-22 仍在推 0.3.1 修复版；VS Code Marketplace 尚未上架，目前从源码打包 .vsix 安装。

OCVYN ("Only CSV Viewer You Need") is a read-only grid for large tabular files inside VS Code: CSV/TSV up to 500 MB, Excel (.xlsx/.xls) up to 50 MB, opening in a blink. Excel-style column filters (distinct values + counts per column), LIKE search, rule filters, global search, multi-level sort, frozen columns — copy any selection as tab-separated text straight into Excel/Sheets. Benchmarks on a 2 vCPU / 2 GB box with a 50 MB CSV: index ~0.17s, filter ~0.4s, multi-column sort ~1–1.4s. Privacy-clean: no data collection, no telemetry, zero network requests.

The author's own words, verbatim from dev.to: "So I vibe coded it with Claude Code. Spec first (speed targets, scope, what's out), then mockups, then the build." All heavy work — parsing, filtering, sorting — runs in a Node worker_threads worker so the UI never stutters. MIT licensed; created 2026-10-14 and still actively iterated (0.3.1 pushed 2026-10-22). VS Code Marketplace listing is pending, so install by packaging the .vsix from source for now.