diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index c915300..aa7758a 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -11,7 +11,7 @@
 Run the full check suite without asking — just do it:
 
 ```bash
-source .venv/bin/activate && pytest tests/ -x -q && ruff check --fix . && mypy .
+source .venv/bin/activate && pytest tests/ -x -q && ruff check --fix . && ruff format --check . && mypy .
 ```
 
 ## Testing conventions
@@ -22,9 +22,29 @@ source .venv/bin/activate && pytest tests/ -x -q && ruff check --fix . && mypy .
 - **Shared fixtures** in `tests/conftest.py`: `sample_profile`, `sample_job`, `sample_evaluation`, `sample_evaluated_job`
 - **Test fixture files** (sample CVs) live in `tests/fixtures/`
 - Pydantic models live in `immermatch/models.py` — follow existing patterns
+- Prefer external libraries and builtins over custom code
 
 ## Code conventions
 
 - All DB writes use `get_admin_client()`, never the anon client
 - Log subscriber UUIDs, never email addresses
 - All `st.error()` calls show generic messages; real exceptions go to `logger.exception()`
+
+## Architecture at a glance
+
+| Module | Purpose |
+|---|---|
+| `app.py` | Streamlit UI: CV upload → profile → search → evaluate → display |
+| `cv_parser.py` | Extract text from PDF/DOCX/MD/TXT |
+| `llm.py` | Gemini API wrapper with retry/backoff |
+| `search_agent.py` | Generate search queries (LLM) + orchestrate search |
+| `search_provider.py` | `SearchProvider` protocol + `get_provider()` factory |
+| `bundesagentur.py` | Bundesagentur für Arbeit API provider (default) |
+| `evaluator_agent.py` | Score jobs against profile (LLM) + career summary |
+| `models.py` | All Pydantic schemas (`CandidateProfile`, `JobListing`, etc.) |
+| `cache.py` | JSON file cache in `.immermatch_cache/` |
+| `db.py` | Supabase: subscribers, jobs, sent-logs |
+| `emailer.py` | Resend: verification, welcome, daily digest emails |
+| `daily_task.py` | Cron: per-subscriber search → evaluate → email |
+
+See `AGENTS.md` for full architecture: agent prompts, DB schema, email flows, caching.
diff --git a/.github/copilot/new-db-function.prompt.md b/.github/copilot/new-db-function.prompt.md
new file mode 100644
index 0000000..0898220
--- /dev/null
+++ b/.github/copilot/new-db-function.prompt.md
@@ -0,0 +1,26 @@
+When adding a new function to `immermatch/db.py`:
+
+1. **Always use `get_admin_client()`** for DB operations (bypasses RLS)
+2. **Never use the anon client** (`get_client()`) for writes
+3. **Log subscriber UUIDs**, never email addresses:
+   ```python
+   logger.info("Updated subscriber sub=%s", subscriber_id)
+   ```
+4. **Follow the existing pattern** — most functions look like:
+   ```python
+   def my_function(param: str) -> ReturnType | None:
+       client = get_admin_client()
+       result = client.table("table_name").select("*").eq("col", param).execute()
+       if not result.data:
+           return None
+       return result.data[0]
+   ```
+5. **Add tests in `tests/test_db.py`** — mock at the Supabase client level:
+   ```python
+   @patch("immermatch.db.get_admin_client")
+   def test_my_function(mock_client):
+       mock_table = MagicMock()
+       mock_client.return_value.table.return_value = mock_table
+       mock_table.select.return_value.eq.return_value.execute.return_value = MagicMock(data=[...])
+   ```
+6. **Update `AGENTS.md` §11** if the function is part of the public API (subscriber lifecycle, job operations)
diff --git a/.github/copilot/new-pydantic-model.prompt.md b/.github/copilot/new-pydantic-model.prompt.md
new file mode 100644
index 0000000..a40ec1e
--- /dev/null
+++ b/.github/copilot/new-pydantic-model.prompt.md
@@ -0,0 +1,18 @@
+When adding a new Pydantic model to `immermatch/models.py`:
+
+1. **Follow existing patterns** — use `BaseModel` with `Field()` descriptions:
+   ```python
+   class MyModel(BaseModel):
+       name: str = Field(description="Short description of the field")
+       items: list[str] = Field(default_factory=list, description="...")
+       score: int = Field(ge=0, le=100, description="...")
+       status: Literal["active", "inactive"] = "active"
+   ```
+2. **Use `str | None`** for optional fields (not `Optional[str]` — project uses PEP 604 style)
+3. **Default values:** Use `= []` for simple lists, `default_factory=list` for mutable defaults in `Field()`
+4. **Add tests in `tests/test_models.py`:**
+   - Construction with all fields
+   - Construction with defaults only
+   - Validation errors for invalid values
+   - Round-trip serialization: `MyModel(**model.model_dump())`
+5. **Update `AGENTS.md` §6** if the model is part of the pipeline schema
diff --git a/.github/copilot/write-tests.prompt.md b/.github/copilot/write-tests.prompt.md
new file mode 100644
index 0000000..3b98996
--- /dev/null
+++ b/.github/copilot/write-tests.prompt.md
@@ -0,0 +1,21 @@
+When writing tests for a module in `immermatch/`:
+
+1. **File naming:** Create `tests/test_<module>.py`
+2. **Imports:** Import the module under test and fixtures from `conftest.py`
+3. **Mock all external services** — never call real APIs:
+   - Gemini: `@patch("immermatch.<module>.call_gemini")`
+   - Supabase: `@patch("immermatch.db.get_admin_client")`
+   - Resend: `@patch("immermatch.emailer.resend")`
+   - SerpApi: `@patch("immermatch.serpapi_provider.serpapi_search")`
+   - Bundesagentur: `@patch("immermatch.bundesagentur.requests.get")`
+4. **Use shared fixtures** from `tests/conftest.py`:
+   - `sample_profile` — `CandidateProfile` with work history
+   - `sample_job` — `JobListing` with apply options
+   - `sample_evaluation` — `JobEvaluation` (score 85)
+   - `sample_evaluated_job` — composite `EvaluatedJob`
+5. **Test fixture files** (sample CVs, text) go in `tests/fixtures/`
+6. **Cover edge cases:** empty inputs, API errors, invalid JSON, missing fields
+7. **Run after writing:**
+   ```bash
+   source .venv/bin/activate && pytest tests/test_<module>.py -x -q
+   ```
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5150825..972b016 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,7 +46,7 @@ jobs:
           cache: pip
       - run: pip install -e ".[test]"
       - name: Tests
-        run: pytest -v --cov=immermatch --cov-report=term --cov-fail-under=50
+        run: pytest -v --cov=immermatch --cov-report=term --cov-fail-under=60
 
   audit:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/daily-digest.yml b/.github/workflows/daily-digest.yml
index 0ade6dd..55c3f34 100644
--- a/.github/workflows/daily-digest.yml
+++ b/.github/workflows/daily-digest.yml
@@ -19,7 +19,7 @@ jobs:
           cache: pip
 
       - name: Install dependencies
-        run: pip install -e ".[prod]"
+        run: pip install -e .
 
       - name: Run daily digest
         env:
diff --git a/AGENTS.md b/AGENTS.md
index bffb26e..718db89 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -510,6 +510,12 @@ Schema setup: run `python setup_db.py` to check tables and print migration SQL.
 | `test_db.py` (35 tests) | `db.py` | Full GDPR lifecycle: add/confirm/expire/purge subscribers, deactivate by token, data deletion, subscription context, job upsert/dedup, sent-log tracking. All DB functions mocked at Supabase client level |
 | `test_emailer.py` (22 tests) | `emailer.py` | HTML generation: job row badges/cards/location, job count, match stats, unsubscribe link, target location in header, impressum line, welcome email (location, days, privacy, impressum) |
 | `test_app_consent.py` (5 tests) | `app.py` | GDPR consent checkbox: session state persistence, widget key separation, on_change sync |
+| `test_app_ui.py` (3 tests) | `app.py` | Streamlit AppTest: Phase A landing page renders, consent checkbox present, sidebar elements |
+| `test_daily_task.py` (8 tests) | `daily_task.py` | `main()` orchestrator: mocked DB, search, evaluation, email; subscriber lifecycle, error handling |
+| `test_integration.py` (11 tests) | Full pipeline | End-to-end: CV text → profile → queries → search → evaluate → summary, all services mocked |
+| `test_pages_unsubscribe.py` (6 tests) | `pages/unsubscribe.py` | Unsubscribe page logic: token validation, DB deactivation, error states (AppTest) |
+| `test_pages_verify.py` (7 tests) | `pages/verify.py` | DOI verification page: token confirmation, welcome email, expiry setting, error states (AppTest) |
+| `test_search_provider.py` (2 tests) | `search_provider.py` | Provider helpers: `parse_provider_query()`, combined provider behavior |
 
 ### Testing conventions
 - All external services (Gemini API, SerpAPI, Supabase) are mocked — no API keys needed to run tests
@@ -553,7 +559,7 @@ Immermatch is **free to self-host** (bring your own API keys). The official host
 
 ## 14. Development Workflow & Agent Instructions
 
-This section documents the development process and conventions for both human and AI agents working on this codebase. `CLAUDE.md` is a symlink to this file, so any AI coding agent (Copilot Chat, Claude Code CLI, etc.) will read these instructions automatically.
+This section documents the development process and conventions for both human and AI agents working on this codebase. `CLAUDE.md` is a lightweight quick-reference version of these instructions that Claude Code loads automatically. It points agents here for full architecture context.
 
 ### Quick Reference (for AI agents)
 
@@ -570,7 +576,7 @@ source .venv/bin/activate
 
 **IMPORTANT:** After every code change, run the check suite **without asking for permission** — just do it:
 ```bash
-source .venv/bin/activate && pytest tests/ -x -q && ruff check --fix . && mypy .
+source .venv/bin/activate && pytest tests/ -x -q && ruff check --fix . && ruff format --check . && mypy .
 ```
 Do not ask the user "Shall I run the tests?" — always run them automatically.
 
diff --git a/CLAUDE.md b/CLAUDE.md
deleted file mode 120000
index 47dc3e3..0000000
--- a/CLAUDE.md
+++ /dev/null
@@ -1 +0,0 @@
-AGENTS.md
\ No newline at end of file
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..ea76be3
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,51 @@
+# Immermatch — Agent Quick Reference
+
+## Environment
+
+```bash
+source .venv/bin/activate   # ALWAYS required before any command
+```
+
+- Python 3.10+, all dependencies in `.venv`
+- Gemini model: `gemini-3-flash-preview` via `google-genai` (NOT `google.generativeai`)
+
+## After every code change — run automatically, don't ask
+
+```bash
+source .venv/bin/activate && pytest tests/ -x -q && ruff check --fix . && ruff format --check . && mypy .
+```
+
+## Rules
+
+- Mock ALL external services in tests (Gemini, SerpAPI, Supabase, Resend) — no API keys needed
+- DB writes: `get_admin_client()` only, never the anon client
+- Log subscriber UUIDs, never email addresses
+- `st.error()` = generic user messages; `logger.exception()` = real errors
+- Pydantic models live in `immermatch/models.py` — follow existing patterns
+- Test naming: `tests/test_<module>.py` for `immermatch/<module>.py`
+- Shared fixtures in `tests/conftest.py`: `sample_profile`, `sample_job`, `sample_evaluation`, `sample_evaluated_job`
+- Test fixture files (sample CVs) in `tests/fixtures/`
+- Prefer external libraries and builtins over custom code
+
+## Architecture (at a glance)
+
+| Module | Purpose |
+|---|---|
+| `app.py` | Streamlit UI: CV upload → profile → search → evaluate → display |
+| `cv_parser.py` | Extract text from PDF/DOCX/MD/TXT |
+| `llm.py` | Gemini API wrapper with retry/backoff |
+| `search_agent.py` | Generate search queries (LLM) + orchestrate search |
+| `search_provider.py` | `SearchProvider` protocol + `get_provider()` factory |
+| `bundesagentur.py` | Bundesagentur für Arbeit job search API provider |
+| `serpapi_provider.py` | Google Jobs via SerpApi provider (future non-DE markets) |
+| `evaluator_agent.py` | Score jobs against candidate profile (LLM) + career summary |
+| `models.py` | All Pydantic schemas (`CandidateProfile`, `JobListing`, etc.) |
+| `cache.py` | JSON file cache in `.immermatch_cache/` |
+| `db.py` | Supabase/Postgres: subscribers, jobs, sent-logs |
+| `emailer.py` | Resend: verification, welcome, daily digest emails |
+| `daily_task.py` | Cron: per-subscriber search → evaluate → email digest |
+
+## Full architecture docs
+
+See `AGENTS.md` for complete system documentation: agent prompts, Pydantic schemas,
+DB schema, email flows, caching strategy, and development workflow.
diff --git a/immermatch/app.py b/immermatch/app.py
index 6de3e58..d9536fa 100644
--- a/immermatch/app.py
+++ b/immermatch/app.py
@@ -1,5 +1,6 @@
 """Streamlit web UI for Immermatch."""
 
+import contextlib
 import hashlib
 import logging
 import os
@@ -31,10 +32,8 @@
     "APP_URL",
 ):
     if key not in os.environ:
-        try:
+        with contextlib.suppress(KeyError, FileNotFoundError):
             os.environ[key] = st.secrets[key]
-        except (KeyError, FileNotFoundError):
-            pass  # handled later via validation
 
 import sys as _sys  # noqa: E402
 from pathlib import Path as _Path  # noqa: E402
diff --git a/immermatch/bundesagentur.py b/immermatch/bundesagentur.py
index 8c9f7f6..fc8d637 100644
--- a/immermatch/bundesagentur.py
+++ b/immermatch/bundesagentur.py
@@ -61,13 +61,10 @@ def _parse_location(arbeitsort: dict) -> str:
     parts: list[str] = []
     if ort := arbeitsort.get("ort"):
         parts.append(ort)
-    if region := arbeitsort.get("region"):
-        # Avoid duplicating city name when region == city
-        if region != ort:
-            parts.append(region)
-    if land := arbeitsort.get("land"):
-        if land not in parts:
-            parts.append(land)
+    if (region := arbeitsort.get("region")) and region != ort:
+        parts.append(region)
+    if (land := arbeitsort.get("land")) and land not in parts:
+        parts.append(land)
     return ", ".join(parts) if parts else "Germany"
 
 
@@ -338,19 +335,18 @@ def _enrich(self, items: list[dict]) -> list[JobListing]:
                 },
                 follow_redirects=True,
             ) as html_client,
+            ThreadPoolExecutor(max_workers=self._detail_workers) as pool,
         ):
-            with ThreadPoolExecutor(max_workers=self._detail_workers) as pool:
-                future_to_refnr = {
-                    pool.submit(self._get_detail, api_client, html_client, item["refnr"]): item["refnr"]
-                    for item in items
-                }
-                for future in as_completed(future_to_refnr):
-                    refnr = future_to_refnr[future]
-                    try:
-                        details[refnr] = future.result()
-                    except Exception:
-                        logger.exception("Failed to fetch detail for %s", refnr)
-                        details[refnr] = {}
+            future_to_refnr = {
+                pool.submit(self._get_detail, api_client, html_client, item["refnr"]): item["refnr"] for item in items
+            }
+            for future in as_completed(future_to_refnr):
+                refnr = future_to_refnr[future]
+                try:
+                    details[refnr] = future.result()
+                except Exception:
+                    logger.exception("Failed to fetch detail for %s", refnr)
+                    details[refnr] = {}
 
         listings: list[JobListing] = []
         for item in items:
diff --git a/immermatch/pages/impressum.py b/immermatch/pages/impressum.py
index 709d16b..f3e6c90 100644
--- a/immermatch/pages/impressum.py
+++ b/immermatch/pages/impressum.py
@@ -1,15 +1,14 @@
 """Impressum / Legal Notice — required by § 5 DDG (Digitale-Dienste-Gesetz)."""
 
+import contextlib
 import os
 
 import streamlit as st
 
 for key in ("IMPRESSUM_NAME", "IMPRESSUM_ADDRESS", "IMPRESSUM_EMAIL", "IMPRESSUM_PHONE"):
     if key not in os.environ:
-        try:
+        with contextlib.suppress(KeyError, FileNotFoundError):
             os.environ[key] = st.secrets[key]
-        except (KeyError, FileNotFoundError):
-            pass
 
 _name = os.environ.get("IMPRESSUM_NAME", "")
 _address = os.environ.get("IMPRESSUM_ADDRESS", "")
diff --git a/immermatch/pages/privacy.py b/immermatch/pages/privacy.py
index 6a7fc41..e0670fa 100644
--- a/immermatch/pages/privacy.py
+++ b/immermatch/pages/privacy.py
@@ -1,15 +1,14 @@
 """Privacy Policy — GDPR compliant."""
 
+import contextlib
 import os
 
 import streamlit as st
 
 for key in ("IMPRESSUM_NAME", "IMPRESSUM_ADDRESS", "IMPRESSUM_EMAIL"):
     if key not in os.environ:
-        try:
+        with contextlib.suppress(KeyError, FileNotFoundError):
             os.environ[key] = st.secrets[key]
-        except (KeyError, FileNotFoundError):
-            pass
 
 _name = os.environ.get("IMPRESSUM_NAME", "")
 _address = os.environ.get("IMPRESSUM_ADDRESS", "")
diff --git a/immermatch/pages/unsubscribe.py b/immermatch/pages/unsubscribe.py
index dcf49a6..9ab0f1f 100644
--- a/immermatch/pages/unsubscribe.py
+++ b/immermatch/pages/unsubscribe.py
@@ -1,5 +1,6 @@
 """One-click unsubscribe page."""
 
+import contextlib
 import logging
 import os
 
@@ -10,10 +11,8 @@
 # Inject secrets into env vars
 for key in ("SUPABASE_URL", "SUPABASE_KEY", "SUPABASE_SERVICE_KEY"):
     if key not in os.environ:
-        try:
+        with contextlib.suppress(KeyError, FileNotFoundError):
             os.environ[key] = st.secrets[key]
-        except (KeyError, FileNotFoundError):
-            pass
 
 from immermatch.db import deactivate_subscriber_by_token, get_admin_client  # noqa: E402
 
diff --git a/immermatch/pages/verify.py b/immermatch/pages/verify.py
index 7c11ffb..4eb2479 100644
--- a/immermatch/pages/verify.py
+++ b/immermatch/pages/verify.py
@@ -1,5 +1,6 @@
 """Double Opt-In confirmation page."""
 
+import contextlib
 import logging
 import os
 
@@ -20,10 +21,8 @@
     "IMPRESSUM_EMAIL",
 ):
     if key not in os.environ:
-        try:
+        with contextlib.suppress(KeyError, FileNotFoundError):
             os.environ[key] = st.secrets[key]
-        except (KeyError, FileNotFoundError):
-            pass
 
 from immermatch.db import SUBSCRIPTION_DAYS, confirm_subscriber, get_admin_client, set_subscriber_expiry  # noqa: E402
 
diff --git a/immermatch/serpapi_provider.py b/immermatch/serpapi_provider.py
index cf9bdbf..104964c 100644
--- a/immermatch/serpapi_provider.py
+++ b/immermatch/serpapi_provider.py
@@ -239,8 +239,7 @@ def infer_gl(location: str) -> str | None:
 def localise_query(query: str) -> str:
     """Replace English city and country names with their local equivalents."""
     query = _LOCALISE_PATTERN.sub(lambda m: CITY_LOCALISE[m.group(0).lower()], query)
-    query = _COUNTRY_LOCALISE_PATTERN.sub(lambda m: COUNTRY_LOCALISE[m.group(0).lower()], query)
-    return query
+    return _COUNTRY_LOCALISE_PATTERN.sub(lambda m: COUNTRY_LOCALISE[m.group(0).lower()], query)
 
 
 # ---------------------------------------------------------------------------
diff --git a/pyproject.toml b/pyproject.toml
index 73846c5..cdb261a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,18 +22,6 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-prod = [
-    "pdfplumber>=0.10.0",
-    "python-docx>=1.0.0",
-    "google-search-results>=2.4.2",
-    "google-genai>=1.0.0",
-    "pydantic>=2.5.0",
-    "python-dotenv>=1.0.0",
-    "streamlit>=1.30.0",
-    "pandas>=2.0.0",
-    "supabase>=2.0.0",
-    "resend>=2.0.0",
-]
 test = [
     "pytest>=8.0.0",
     "pytest-cov>=5.0.0",
@@ -58,7 +46,7 @@ target-version = "py310"
 line-length = 120
 
 [tool.ruff.lint]
-select = ["E", "F", "W", "I", "UP", "S"]
+select = ["E", "F", "W", "I", "UP", "S", "B", "C4", "SIM", "RET"]
 ignore = ["E501"]
 
 [tool.ruff.lint.per-file-ignores]
diff --git a/tests/test_app_consent.py b/tests/test_app_consent.py
index d98ff37..9b77698 100644
--- a/tests/test_app_consent.py
+++ b/tests/test_app_consent.py
@@ -22,7 +22,7 @@ def __getattr__(self, name: str):
         try:
             return self[name]
         except KeyError:
-            raise AttributeError(name)
+            raise AttributeError(name) from None
 
     def __setattr__(self, name: str, value):
         self[name] = value