Add a2ml_ex and k9_ex to Text and Numbers section

[hyperpolymath]

Summary

• Adds a2ml_ex — parser and renderer for A2ML (Attested Markup Language), an AI agent identity and attestation format
• Adds k9_ex — parser and renderer for K9 (Self-Validating Components), configuration with trust levels and Nickel contracts

Both are placed alphabetically in the Text and Numbers section.

About A2ML and K9

A2ML (Attested Markup Language) is a lightweight markup format for AI agent identity and attestation. It provides a standardised way for AI systems to declare capabilities, provenance, and trust properties. An IANA media type registration is in progress (application/a2ml).

K9 (Self-Validating Components) is a configuration format with built-in trust levels and Nickel contract integration. K9 files declare their own validation rules inline, enabling configuration that is both human-readable and formally verifiable.

Both formats have implementations across multiple language ecosystems (Rust, Elixir, Gleam).

[krns]

Why are both of the repos archived since yesterday?

[hyperpolymath]

Hi @krns — I sincerely apologise for that! I was reorganising my repositories and consolidating some of the smaller packages into a monorepo structure to reduce clutter, and I archived these without first checking that I had open pull requests linking to them. That was a really careless oversight on my part and I'm sorry for any confusion it caused.

Both repos are now unarchived and fully accessible again. The code, documentation, and Hex packages are all intact and actively maintained. I'll be more careful about checking for external references before making organisational changes in future.

Again, really sorry about that — it won't happen again.