flyx.org

What is flyx?

flyx is the personal site of a developer who describes themselves as a "code wizard and a pen & paper enthusiast." It is not a company, product or service — it is one person's homepage, used to introduce themselves and point to the open-source software they maintain.

What you'll find there

The page is short and project-focused. The projects listed cover a fairly specific niche: language tooling and tabletop role-playing aids.

• Nyarna — a LaTeX-like markup language
• Zicross — a cross-packaging Nix toolkit
• NimYAML — a YAML 1.2 implementation in Nim
• DSA 4.1 Heldendokument — a German character sheet built in LuaLaTeX

Contact is offered through Matrix or email rather than a contact form or social media profile.

Who it's for

The site is most useful if you already know why you're there. Typical visitors would be:

• Nim developers looking for a YAML library, or anyone evaluating YAML 1.2 conformance in a non-mainstream language.
• Nix users interested in cross-platform packaging workflows.
• People working on markup languages or parsers who want to see how someone else approached the problem.
• German-speaking Das Schwarze Auge players who want a LaTeX-based character sheet.

If you're looking for tutorials, documentation hubs or a blog with regular posts, this is not that kind of site. It reads as a directory of work rather than a publication.

A practical next step

Start with the project that matches your own toolchain. If you write Nim, GitHub is the likely place to find the NimYAML source and its issue tracker; if you use Nix, the Zicross repository will tell you quickly whether its packaging approach fits your setup. For the character sheet, the relevant question is whether you already run LuaLaTeX — if you don't, the setup cost may outweigh the benefit compared with a fillable PDF.

As a decision criterion: treat this page as an index, not a review. Check each project's own repository for commit activity and open issues before adopting anything, since a personal homepage rarely signals how actively a given project is maintained.

What open source projects has flyx created?

flyx lists four open-source projects on their personal site, spanning language tooling, packaging, and tabletop role-playing aids.

The projects listed

• Nyarna — described as a LaTeX-like markup language.
• Zicross — a cross-packaging Nix toolkit.
• NimYAML — a YAML 1.2 implementation in Nim.
• DSA 4.1 Heldendokument — a German character sheet written in LuaLaTeX.

What the mix suggests

The self-description — "code wizard and a pen & paper enthusiast" who writes parsers and compilers — lines up with the list. Three of the four are developer tools, and the fourth is a tabletop gaming document, so the projects read as a direct extension of both stated interests rather than a single narrow niche.

Choosing where to look first

A useful next step is to judge each project by its own repository rather than the homepage: check the last commit date, open issues, and whether documentation matches your version of Nim, Nix, or LaTeX. Projects like NimYAML are easiest to evaluate by running its test suite against your own YAML files; Nyarna and Zicross are better judged by reading their docs first, since both change how you write or build things. The site also notes contact via Matrix or email, which is the practical route for questions about any of them.

How can I contact flyx?

Contact flyx through Matrix at @flyx:klacker.eu, or by email — an email link is provided on the site itself.

Which to choose

• Matrix suits a quick, informal message or an ongoing technical conversation. It is the contact method listed first, which suggests it is the preferred channel.
• Email is the better route if you want to attach files, write at length, or keep a record of the exchange. Since the site does not publish the address in plain text, use the email link on Hi, I'm flyx. to avoid guessing it.

Before you write

flyx describes himself as a code wizard and pen-and-paper enthusiast who writes parsers, compilers and "sometimes other stuff," and lists open-source projects including Nyarna, Zicross, NimYAML and a German DSA 4.1 character sheet. If your question concerns one of those projects, say which one and include the version or commit you are using — that context usually gets a faster and more useful reply than a general greeting. For bug reports, a minimal reproducing example is worth more than a long description.

What is Nyarna used for?

Nyarna is a LaTeX-like markup language, listed among flyx's open source projects on Hi, I'm flyx.. The key phrase is "LaTeX-like": it points to a document markup system in the same family of tools as LaTeX, where you write structured source and a processor turns it into typeset output.

What that means in practice

If you have used LaTeX, the workflow will feel familiar: plain-text files, commands and environments rather than a visual editor, and a compile step that produces the finished document. That approach suits people who want consistent formatting across long documents, version-controllable source, and precise control over structure — theses, technical reports, manuals, or anything with heavy cross-referencing.

The "markup language" part matters too. Nyarna is positioned as a language, not just a template or macro package, which suggests its own syntax and processing rules rather than a thin wrapper around LaTeX itself. The page does not state which output formats it targets, how mature it is, or what distinguishes it from LaTeX in detail, so treat those as open questions.

Where it fits among flyx's projects

The surrounding projects give a sense of the author's interests:

• NimYAML — a YAML 1.2 implementation in Nim, i.e. parsing and serialisation work.
• Zicross — a cross-packaging Nix toolkit, aimed at build and packaging workflows.
• DSA 4.1 Heldendokument — a German character sheet built in LuaLaTeX, showing hands-on document typesetting experience.

So Nyarna sits alongside parser and compiler projects, which is consistent with a markup language being a language-design and processing problem rather than only a typesetting convenience.

Next step

Open the Nyarna project page from flyx's site and check two things first: the syntax examples and the output formats. If the examples read comfortably to you and the output matches what you need to produce, it is worth a trial document. If you need a mature ecosystem of packages and templates, LaTeX itself remains the safer default, and Nyarna becomes something to watch or experiment with.

What is NimYAML used for?

NimYAML is an open-source YAML 1.2 implementation written in Nim, listed among flyx's projects on Hi, I'm flyx. It is aimed at Nim developers who need to read or write YAML from their own programs — for example, loading configuration files, parsing structured data files, or generating YAML output — rather than at people looking for a standalone command-line YAML tool.

Practical uses in a Nim project typically include:

• Config loading: reading a YAML settings file into Nim data structures at startup.
• Data interchange: parsing YAML documents produced by other tools or services.
• Serialization: emitting YAML from Nim objects for logs, fixtures or exports.
• Tooling: building Nim utilities that consume or transform YAML-based files.

YAML 1.2 support matters if your documents rely on that specification's behaviour, since YAML 1.1 and 1.2 differ on some parsing details. If you are working in Nim and your YAML is version-sensitive, that is the main reason to pick a 1.2-targeted library; if you only need to read a small, simple config file, almost any YAML parser will do.

Next step: check the project's documentation for how it maps YAML nodes to Nim types and how it reports parse errors, then try it on one real file from your project before committing to it.

What is Zicross used for?

Zicross is a cross-packaging toolkit built on Nix, listed among flyx's open source projects on Hi, I'm flyx.. "Cross-packaging" means using one packaging system to produce packages for several target platforms or ecosystems, rather than maintaining a separate native build recipe for each.

What that means in practice

• One source of truth: a single package description drives builds across multiple targets, so version bumps and dependency changes are made once.
• Nix as the engine: it leans on Nix's reproducible build model, so outputs are built from pinned inputs rather than from whatever happens to be installed on the machine.
• Aimed at maintainers: the people who benefit most are those who already package software and are tired of duplicating that work per platform.

Who should look at it

If you maintain a tool that ships to more than one package ecosystem and you already use Nix, Zicross is worth reading as a reference for how the author structured that problem. If you don't use Nix, adopting it means adopting Nix first — that is the real cost, and it is a larger commitment than the toolkit itself.

Concrete next step

Open the project page from flyx's site and read the repository's README and example package definitions before anything else. The examples will show which target formats are actually supported; that list, not the general idea, is what determines whether Zicross fits your project. As a rough decision rule: choose it if you have at least two target platforms and a Nix-based workflow already; otherwise, a per-platform packaging script will likely be less work.