diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
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+Bugsink is a Django-based error tracker. It's maintained by one developer and favors simple, predictable code over
+abstract generality. Python 3.12 is the standard environment.
+
+## Coding Guidance
+
+* Keep it clear and simple.
+* Avoid overly clever or verbose code — this isn't Java.
+* Use Django idioms: models, views, middleware, etc.
+* Follow PEP8 and ensure `flake8` passes (CI ignores E127, E741, E501, E731).
+* Use descriptive names, short functions, minimal boilerplate.
+
+## Tests
+
+* Prefer a few focused unit tests around testable logic.
+* Broader integration tests are fine to exercise key flows.
+* It's OK to generate simple coverage-style tests — just mark them with:
+  `# LLM-generated test for coverage`
+
+### Further details
+
+##### Database
+
+* Bugsink assumes a single-writer DB model (no write concurrency).
+* Keep writes short
+* Use `bugsink/transaction.py` helpers like `@durable_atomic` etc.
+
+##### Frontend (Tailwind)
+
+* Bugsink doesn't have a backend/frontend split: "classic django instead"
+* Bugsink uses Tailwind via `django-tailwind`
+* Before committing, build the CSS and add it:
+  `python manage.py tailwind build && git add theme/static/css/dist/styles.css`
+
+##### Other
+
+* Use function-based views by default.
+* Use `python manage.py runserver` (uses `bugsink.settings.development`)
+* The default SQLite setup should work out of the box.
diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
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+name: "Copilot Setup Steps"
+on:
+  push:
+    paths:
+      - ".github/workflows/copilot-setup-steps.yml"
+  workflow_dispatch:
+  # The "on" section defines when this workflow runs independently.
+  # It has no effect on Copilot itself — Copilot runs this job on demand
+  # if the job name is exactly "copilot-setup-steps".
+  # These triggers just let us test the workflow manually if needed.
+
+jobs:
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    env:
+      DJANGO_SETTINGS_MODULE: bugsink.settings.development
+      SAMPLES_DIR: ${{ github.workspace }}/event-samples
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install -r requirements.development.txt
+        # We install directly from source using pip — no wheels, no Docker.
+        # This keeps the setup fast and simple for Copilot.
+        # To ensure correctness for more complex scenarios (e.g. multiple DBs),
+        # we rely on the actual CI pipeline.
+
+      - name: Fetch event-samples data
+        uses: actions/checkout@v4
+        with:
+          repository: bugsink/event-samples
+          path: event-samples
+