# Dual-Domain Support Implementation Plan

> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.

**Goal:** Serve the portfolio on both `gabrielkaszewski.dev` and `gabrielkaszewski.pl` with identical content, with `.dev` as the canonical domain for SEO.

**Architecture:** Two independent changes — Traefik routing config to accept both hostnames, and Next.js metadata to inject a canonical `<link>` tag. No app logic changes.

**Tech Stack:** Next.js 15 (App Router metadata API), Traefik (Docker labels), Let's Encrypt TLS.

---

### Task 1: Add `.pl` domain to Traefik router

**Files:**
- Modify: `compose.yml`

- [ ] **Step 1: Update the Traefik router rule**

In `compose.yml`, change the router rule label from:

```yaml
- "traefik.http.routers.gabrielkaszewski.rule=Host(`gabrielkaszewski.dev`)"
```

to:

```yaml
- "traefik.http.routers.gabrielkaszewski.rule=Host(`gabrielkaszewski.dev`) || Host(`gabrielkaszewski.pl`)"
```

The full `labels` block should look like:

```yaml
labels:
  - "traefik.enable=true"
  - "traefik.http.routers.gabrielkaszewski.rule=Host(`gabrielkaszewski.dev`) || Host(`gabrielkaszewski.pl`)"
  - "traefik.http.routers.gabrielkaszewski.entrypoints=websecure"
  - "traefik.http.routers.gabrielkaszewski.tls.certresolver=letsencrypt"
```

Note: Traefik's Let's Encrypt cert resolver automatically provisions a cert for every hostname matched by the router rule, so no additional TLS labels are needed.

- [ ] **Step 2: Commit**

```bash
git add compose.yml
git commit -m "feat: add gabrielkaszewski.pl to traefik router"
```

---

### Task 2: Add canonical URL to Next.js metadata

**Files:**
- Modify: `app/layout.tsx`

- [ ] **Step 1: Add `alternates.canonical` to the metadata export**

In `app/layout.tsx`, add `alternates` to the existing `metadata` object:

```ts
export const metadata: Metadata = {
  title: {
    default: "Gabriel Kaszewski | Software Engineer",
    template: "%s | Gabriel Kaszewski",
  },
  description:
    "The portfolio of Gabriel Kaszewski, a software engineer specializing in Rust, Python, and modern web technologies.",
  keywords: [
    "Gabriel Kaszewski",
    "Software Engineer",
    "Rust Developer",
    "Python Developer",
    "Next.js",
    "Portfolio",
  ],
  alternates: {
    canonical: "https://gabrielkaszewski.dev",
  },
  openGraph: {
    // ... rest unchanged
  },
  // ... rest unchanged
};
```

- [ ] **Step 2: Verify the canonical tag is present in the built HTML**

Run the dev server:

```bash
bun run dev
```

Then in another terminal, check the rendered HTML for the canonical tag:

```bash
curl -s http://localhost:3000 | grep -i canonical
```

Expected output:

```
<link rel="canonical" href="https://gabrielkaszewski.dev"/>
```

- [ ] **Step 3: Commit**

```bash
git add app/layout.tsx
git commit -m "feat: add canonical URL to metadata"
```