# thiessen.io

Personal site of **Dennis Thiessen** — Staff Data, Analytics & AI Engineer (Bern, Switzerland).

Built with [Astro](https://astro.build/) and one React island. The home page is a dark, terminal-style
agent that answers questions about Dennis's work, stack and projects, with a plain page one click away
("Classic view") and an optional light theme. Styles are plain CSS in `src/assets/style.css`
(no preprocessor). Fonts are self-hosted, so visitors make no request to any third party, and the site
uses no analytics.

The content is deliberately focused on what recruiters scan for: current role, headline stack,
what was delivered at each employer and at what scope, education, and contact. Personal, private and
employer-internal details are left out on purpose. `npm test` checks every answer the terminal can give
against a list of things that must never be published; the specifics live in `test/banned.private.json`,
which is git-ignored so the list itself never leaks.

## How the agent works

There is no language model and no network call. Every answer is generated in the browser from one
curated knowledge base, so nothing can be invented.

| Path                   | Role                                                                           |
| ---------------------- | ------------------------------------------------------------------------------ |
| `src/data/profile.mjs` | The only place facts live: roles, skills (by how they were used), projects     |
| `src/agent/engine.mjs` | Command parser, intent matcher and answer builder. Pure functions, no DOM      |
| `src/agent/oncall.mjs` | The short `/oncall` choose-your-path scene                                     |
| `src/components/`      | `Terminal` (input, typing effect), `blocks` (answer renderers), `Classic`, `Shell` |
| `src/layouts/Base.astro` | Document shell: fonts, icons, theme script                                   |
| `src/pages/`           | `index.astro` (head tags, share card, JSON-LD) and `404.astro`                 |
| `public/`              | Static files copied as-is: share card, icons, web manifest                     |
| `test/`                | Routing tests and a content guard (see below)                                  |

To change what the site says, edit `src/data/profile.mjs`. Skills carry a tier (`now`, `before`, `ai`,
`poc`, `study`); a skill that is not listed is answered with "not in his listed stack" via `NON_CLAIMS`.

Deep links work: `thiessen.io/#/projects`, `#/experience bosch`, `#classic`.

## Develop

Needs Node 22.23 or newer (see `.nvmrc`).

```bash
npm install
npm run dev             # http://localhost:4321
npm test                # node's built-in test runner, no extra dependencies
npm run build           # static site in ./dist
npm run preview         # serve ./dist locally
```

After changing `public/icons/icon-512.png`, regenerate the favicon, touch icon and manifest with
`node scripts/make-icons.mjs`.

## Deploy

Pushing to `master` triggers the Gitea Actions workflow in
`.gitea/workflows/workflow.yaml`, which builds the site and rsyncs `dist/`
to the web server over SSH. It relies on these repository secrets:
`SSH_PRIVATE_KEY`, `SSH_KNOWN_HOSTS`, `DEPLOY_USER`, `DEPLOY_HOST`, `DEPLOY_PATH`.
The rsync does not delete files that are no longer part of the site.