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Sebastian Software
Our agency

Open software you can build on.

Documentation, internationalization, document engines, and tools for coding agents. Open projects with practical uses and foundations you can inspect.

Explore the projects

Open source, in numbers.

All opted-in public projects and published packages, in one shared snapshot.

Public projects
26
GitHub stars
40
npm downloads / month
2.5M
crates.io downloads / month
—

Collected:

Explore all metrics

Open source project

Palamedes

Rust-powered internationalization.

Write messages close to the code, keep source-string catalogs in your repository, and let a native toolchain extract, validate, and compile them. Palamedes brings TypeScript applications into more languages with one runtime model.

Explore Palamedes
A drawn messages.po catalog in front of cards for German, French, Spanish, and Japanese.

Open source project

Ferramenta

Rust engines and applications for documents and text.

A family of independent tools for document and text work: regular expressions, syntax highlighting, Markdown, spell checking, translation catalogs, file walking, and PDF previews. Choose the engine that solves your task; each one can be inspected and used on its own.

Explore FerramentaLearn about Ferromark
A drawn Ferromark document stamped “Markdown into documents” beside books and a wooden stamp.

Open source project

Dalo

Manage your agent's setup. Just ask.

Keep skills, standing instructions, and hooks in Git. Dalo resolves one approved setup and delivers it to the folders your coding agents already read, so teams can keep shared practices across people and machines.

Open Dalo
Drawn cards for skills, instructions, and hooks in a tray beside a mug.

Open source project

Ardo

Modern, open documentation for React teams.

Build documentation with your React stack and keep the content in your repository. Ardo brings guides, API reference, and navigation into a site your team can maintain, without moving docs into a closed platform.

Open Ardo
A drawn open book with an Ardo table of contents and the line “Build beautiful docs with React”.

Open source project

Effective Agent

Better judgment for coding agents.

Seven open-source skills that put our way of working into instructions a coding agent can follow: product decisions, web, engineering, delivery, writing, marketing, and image work. Install one for your next task, read every reference before you trust it, and combine them when the work crosses disciplines.

Explore Effective AgentView on GitHub
A drawn little tin robot with glowing eyes, connected by a cable to a device holding seven colored cartridges.

More open projects.

Tools, services and libraries for the next part of your work.

Tools & services

  • Paratix

    Describe a VPS in TypeScript and apply changes over SSH.

    • TypeScript
    • CLI

    Node.js

    Updated

  • Relanto

    Send application email through your own SMTP servers and a shared HTTP API.

    • TypeScript
    • Service

    Self-hosted

    Updated

  • Harness Relay

    Let one coding agent hand a bounded task to another local harness.

    • TypeScript
    • CLI

    Node.js

    Updated

  • mdtheme

    Keep Markdown headers, footers, branding and badges consistent across repositories.

    • Rust
    • CLI

    Native

    Updated

  • Offcourse

    Keep online courses available offline, with local transcription support.

    • TypeScript
    • CLI

    Node.js

    Updated

  • Stellara

    Bring search, browser tools and memory behind one self-hosted AI gateway.

    • TypeScript
    • Service

    Self-hosted

    Updated

  • Antigraph

    Turn books from your Kindle library into searchable Markdown.

    • TypeScript
    • CLI

    Node.js

    Updated

  • Cuttledoc

    Transcribe speech locally with a Rust core and native CLI.

    • Rust core
    • CLI + library

    Native

    Updated

  • Naos

    Compile TSX into lightweight Web Components for the browser.

    • TypeScript
    • Compiler

    Build tooling

    Updated

Libraries & packages

  • ESLint Config Setup

    Share prebuilt lint rules and practical guardrails across TypeScript teams.

    • TypeScript
    • Configuration

    Build tooling

    Updated

  • xlsx-format

    Read and write modern Excel files in the browser and Node.js.

    • TypeScript
    • Library

    Browser + Node.js

    Updated

  • Oxlint Config Setup

    Apply prebuilt, type-aware lint configurations to TypeScript projects.

    • TypeScript
    • Configuration

    Build tooling

    Updated

  • pdfium-node

    Render selected PDF pages as thumbnails through native PDFium bindings.

    • C++ core
    • Library

    Native · Node.js

    Updated

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