🪴 Brain

Dev Libraries & Build Tools

2 min read

Dev Libraries & Build Tools

A collective reference for the smaller JavaScript/TypeScript libraries that show up across my projects. These don’t warrant individual tool notes — they’re focused, well-known dependencies — but they’re worth recording in one place so the stack is searchable and linkable.

Project key: Q = Qamera AI · AGRE = AGRE · TTTR = Tech To The Rescue · TNW = Tech News Weekly · TC = Travelcast AI · VB = Value Builders

🧩 Validation

  • Zod — TypeScript-first schema declaration + validation. Used to validate YAML/JSON config, API payloads, and — importantly for AI pipelines — to parse and guarantee the shape of LLM tool_use/structured output before it’s trusted. Used by: Q, AGRE, TNW, TC. — zod.dev

🧪 Testing

  • Vitest — Vite-native unit test runner; fast, ESM-first, Jest-compatible API. The default unit-test layer across the TypeScript projects. Used by: Q, AGRE, TNW, TC. — vitest.dev
  • Playwright — end-to-end browser testing across Chromium/Firefox/WebKit; also taught as the verification step in “vibe engineering.” Used by: Q, AGRE, VB. — playwright.dev

🗒️ Logging

  • Pino — very fast, low-overhead structured JSON logging for Node; logs become queryable rather than free-text. Used by: Q, TNW. — getpino.io

🎨 Image & media rendering

  • Satori — converts HTML/JSX + CSS into SVG; the engine behind generated cover/OG images from a template. Used by: TNW. — github.com/vercel/satori
  • Sharp — high-performance Node image processing (resize, format conversion, SVG→PNG); the rasterization step after Satori, and general image transforms. Used by: TNW. — sharp.pixelplumbing.com
  • FFmpeg — the universal audio/video toolkit; used for audio normalization and assembly (stereo, 44.1 kHz, 192 kbps) in podcast generation. Used by: TC. — ffmpeg.org

⌨️ CLI framework

  • Commander.js — the standard Node framework for building command-line interfaces (commands, options, help); structures the fetch → select → generate → … pipeline CLI. Used by: TNW. — github.com/tj/commander.js

🌍 Internationalization

  • next-intl — internationalization for Next.js App Router; messages-as-source-of-truth, locale routing. The i18n backbone for a four-language property site. Used by: AGRE. — next-intl.dev

🔗 Links

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