Tag: open-source

November 1, 2026 13 min read

Porting Go's teatest to TypeScript: Golden-File Tests for Bubble Tea Programs

Charm's teatest runs a Bubble Tea program headless, sends it keys, waits for its output and compares everything it wrote with a golden file. It is now a TypeScript package that works with bun test, node:test and Vitest. 137 tests, escaping and diffs checked against real Go, and a failure message made to be read.

November 1, 2026 12 min read

Porting Go's Freeze to TypeScript: Code and Terminal Screenshots, Byte for Byte

Charm's freeze turns code and terminal output into SVG, PNG and WebP images. The TypeScript port reproduces upstream's SVG byte for byte for terminal output and in everything but token colours for code, renders PNGs about 20 times faster than freeze's own WebAssembly fallback, and writes real WebP with a 455-line encoder. 100 tests, 37 golden SVGs.

November 1, 2026 12 min read

Testing

Porting Go's ntcharts to TypeScript: Terminal Charts That Match Go to the Last Bit

NimbleMarkets' ntcharts, the charting library for Bubble Tea, is now a TypeScript package: canvas, bar, line, streaming, time series, wave, sparkline and heatmap charts, candlesticks and JSON chart specs. Its output is compared byte for byte with the Go library on 342 scenarios, which meant reproducing Go's fused multiply-add and its own math functions.

November 1, 2026 12 min read

Porting Go's Wish to TypeScript: SSH Apps and Bubble Tea over SSH

Charm's wish, the Go library for building SSH apps, is now a TypeScript package on top of ssh2: an SSH server with middleware, one Bubble Tea program per session, Git and SCP. 154 tests on Node and Bun, and the key-generation bug that hid behind a flaky test.

October 6, 2026 10 min read

Oak Oil: Cargo Plans, We Execute — Lean, Fast Rust Builds That Stay Byte-Identical to Stock Cargo

One Mac held 469 GiB of Cargo target directories, 177 GiB of them byte-identical copies. Oak Oil borrows Bun's build architecture: Cargo plans, our executor runs the plan against a content-addressed store. Output is byte-identical to stock Cargo, a wiped target comes back in 1.7 s instead of 11 s, and cleanup is verified by Cargo itself. Open source, built and published in public.

Stop Pasting Into ChatGPT. Build a Knowledge Base Your AI Can Actually Search.

I built a CLI tool that turns URLs, PDFs, and markdown into a searchable knowledge base with AI-powered Q&A. No vector database. No embedding service. Just files, BM25 search, and LLM synthesis — all from your terminal.

April 3, 2026 7 min read

How kb Works: 27 Modules, One External Dependency, and a Compiler That Turns Raw Sources Into a Wiki

A deep dive into the architecture of kb — the CLI knowledge base tool. Hash-based incremental compilation, BM25 search, TTY-aware dual output, Zod-validated frontmatter, and a dependency graph that recompiles only what changed. 154 tests, 27 TypeScript modules, the full @oakoliver stack.

April 3, 2026 8 min read

March 20, 2026 6 min read

Porting Go's Huh? to TypeScript: Interactive Terminal Forms, Zero Dependencies

Charmbracelet's Huh? — interactive terminal forms with 7 field types, 5 themes, dynamic evaluation, and validation — is now a TypeScript package. 4,944 lines of source, 28 tests, 126 expects. The sixth Charm ecosystem port.

March 19, 2026 9 min read

Porting Go's Glow to TypeScript: A Terminal Markdown Reader, Zero Dependencies

Charmbracelet's Glow — the terminal markdown reader with CLI and interactive TUI modes — is now a TypeScript package. 4,254 lines of source, 10 Go dependencies replaced, 60 tests. The fifth and final Charm port.

March 16, 2026 7 min read

Porting Go's Terminal UI Ecosystem to TypeScript: Glamour and Lipgloss Are Now on npm

charmbracelet/glamour and charmbracelet/lipgloss are now available as TypeScript packages. Custom GFM parser, 7 built-in themes, 645+ tests. The first two of five Charm ports.

March 16, 2026 7 min read

Porting Go's Bubble Tea to TypeScript: An Elm Architecture TUI Framework for Node.js

Charmbracelet's Bubble Tea — the Elm Architecture TUI framework — is now available as a zero-dependency TypeScript package. Event loop, input parser, renderer, 46 tests. The third of five Charm ports.

March 16, 2026 7 min read

Porting Go's Bubbles to TypeScript: 15 TUI Components, Zero Dependencies

Charmbracelet's Bubbles — 15 pre-built TUI components including text inputs, viewports, tables, lists, and spinners — is now available as a zero-dependency TypeScript package. 256 tests, 11,738 lines. The fourth of five Charm ports.

March 15, 2026 9 min read

I Rewrote Python's Fastest BM25 Library in TypeScript: 2x Faster Indexing, Zero Dependencies

How bm25s (formerly bun-bm25s) indexes about 2x faster than Python's bm25s library using nothing but TypeScript and typed arrays. Retrieval beats bm25s's numpy backend but not its numba backend, as the October 2026 re-measurement shows.