Thinkerbell
Thinkerbell — turning vague requests into clear requirements

Open source · MIT · Free forever

The AI Requirements Toolkit

Two toolkits that make AI do serious analytical work properly — one for requirements engineering, one for Swiss and EU regulatory reporting. Both ship as Claude and Codex skills that run the whole workflow for you. Free, open, and ready to drop into your work.

Pick your toolkit

They share a method and a licence, not an audience. Take the one that matches the work in front of you — or both, they install side by side.

Never installed a plugin before?No terminal experience assumed. The step-by-step guide walks through installing Claude Code or Codex, adding the marketplace, and checking it worked — plus a no-install route that is just copy and paste.Open the guide →

One idea, two domains

Both toolkits exist because fluent AI output is not the same thing as trustworthy AI output. Neither of them asks you to be more careful — they make the careless answer structurally hard to produce.

Ambiguity is made visible

One toolkit refuses to let “quickly and securely” survive into a requirement. The other refuses to let an unsourced sentence survive into a regulatory brief. Same move, different vocabulary.

A human still decides

Every skill assumes a qualified person makes the final call. The tools accelerate the work and show their reasoning; they do not own the outcome.

Plain Markdown, no lock-in

Every skill, template and checklist is a Markdown file in a public repo. Install the plugin, or copy the one file you need into your own wiki. Both are fine.

MIT, free, forever

No account, no e-mail, no upsell. Use them commercially, fork them, rename them, adapt them to your domain and glossary.

If it saves you time, star it

A star is the signal that keeps this growing — it tells me which pieces are worth expanding, and it helps other people find the toolkits. It costs you a click and means a lot.