diff --git a/.cliff.toml b/.cliff.toml
new file mode 100644
index 0000000..cca3608
--- /dev/null
+++ b/.cliff.toml
@@ -0,0 +1,41 @@
+[changelog]
+header = """
+# Changelog\n
+"""
+body = """
+{% if version %}\
+## [{{ version | trim_start_matches(pat="v") }}] — {{ timestamp | date(format="%Y-%m-%d") }}
+{% else %}\
+## [Unreleased]
+{% endif %}\
+{% for group, commits in commits | group_by(attribute="group") %}
+### {{ group | striptags | trim | upper_first }}
+{% for commit in commits %}
+- {% if commit.scope %}**{{ commit.scope }}:** {% endif %}{{ commit.message | upper_first }}\
+{% endfor %}
+{% endfor %}\n
+"""
+trim = true
+footer = ""
+
+[git]
+conventional_commits = true
+filter_unconventional = true
+split_commits = false
+commit_preprocessors = [
+  { pattern = '\(#([0-9]+)\)', replace = "([#${1}](https://git.opensourcesolarpunk.com/Circuit-Forge/snipe/issues/${1}))" },
+]
+commit_parsers = [
+  { message = "^feat", group = "Features" },
+  { message = "^fix", group = "Bug Fixes" },
+  { message = "^perf", group = "Performance" },
+  { message = "^refactor", group = "Refactoring" },
+  { message = "^docs", group = "Documentation" },
+  { message = "^test", group = "Testing" },
+  { message = "^revert", group = "Reverts" },
+  { message = "^chore", skip = true },
+]
+filter_commits = true
+tag_pattern = "v[0-9]*"
+topo_order = false
+sort_commits = "oldest"
diff --git a/.forgejo/workflows/ci.yml b/.forgejo/workflows/ci.yml
new file mode 100644
index 0000000..56aa7e9
--- /dev/null
+++ b/.forgejo/workflows/ci.yml
@@ -0,0 +1,62 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  api:
+    name: API — lint + test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install circuitforge-core
+        env:
+          FORGEJO_TOKEN: ${{ secrets.FORGEJO_TOKEN }}
+        run: |
+          git clone https://x-token:${FORGEJO_TOKEN}@git.opensourcesolarpunk.com/Circuit-Forge/circuitforge-core.git /tmp/circuitforge-core
+          pip install -e /tmp/circuitforge-core
+
+      - name: Install snipe + dev deps
+        run: pip install -e ".[dev]"
+
+      - name: Lint (ruff)
+        run: ruff check app/ api/ tests/
+
+      - name: Run tests
+        run: pytest tests/ -v
+
+  web:
+    name: Web — typecheck + test + build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: "npm"
+          cache-dependency-path: web/package-lock.json
+
+      - name: Install deps
+        working-directory: web
+        run: npm ci
+
+      - name: Type check
+        working-directory: web
+        run: npx vue-tsc --noEmit
+
+      - name: Unit tests
+        working-directory: web
+        run: npm test
+
+      - name: Build
+        working-directory: web
+        run: npm run build
diff --git a/.forgejo/workflows/mirror.yml b/.forgejo/workflows/mirror.yml
new file mode 100644
index 0000000..5ff0a07
--- /dev/null
+++ b/.forgejo/workflows/mirror.yml
@@ -0,0 +1,37 @@
+name: Mirror
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*"]
+
+jobs:
+  mirror-github:
+    name: Mirror to GitHub
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Push to GitHub
+        env:
+          GITHUB_MIRROR_TOKEN: ${{ secrets.GITHUB_MIRROR_TOKEN }}
+        run: |
+          git remote add github https://x-access-token:${GITHUB_MIRROR_TOKEN}@github.com/CircuitForgeLLC/snipe.git
+          git push github --mirror
+
+  mirror-codeberg:
+    name: Mirror to Codeberg
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Push to Codeberg
+        env:
+          CODEBERG_MIRROR_TOKEN: ${{ secrets.CODEBERG_MIRROR_TOKEN }}
+        run: |
+          git remote add codeberg https://CircuitForge:${CODEBERG_MIRROR_TOKEN}@codeberg.org/CircuitForge/snipe.git
+          git push codeberg --mirror
diff --git a/.forgejo/workflows/release.yml b/.forgejo/workflows/release.yml
new file mode 100644
index 0000000..5136144
--- /dev/null
+++ b/.forgejo/workflows/release.yml
@@ -0,0 +1,67 @@
+name: Release
+
+on:
+  push:
+    tags: ["v*"]
+
+jobs:
+  release:
+    name: Build images + create release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate changelog
+        uses: orhun/git-cliff-action@v3
+        id: cliff
+        with:
+          config: .cliff.toml
+          args: --current --strip header
+        env:
+          OUTPUT: CHANGES.md
+
+      - uses: docker/setup-buildx-action@v3
+
+      # BSL product: push to Forgejo registry only.
+      # GHCR push is deferred pending license-gate-at-startup implementation (Circuit-Forge/snipe#3).
+      - uses: docker/login-action@v3
+        with:
+          registry: git.opensourcesolarpunk.com
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.FORGEJO_RELEASE_TOKEN }}
+
+      - name: Build and push API image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: docker/api/Dockerfile
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            git.opensourcesolarpunk.com/circuit-forge/snipe-api:${{ gitea.ref_name }}
+            git.opensourcesolarpunk.com/circuit-forge/snipe-api:latest
+
+      - name: Build and push web image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: docker/web/Dockerfile
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            git.opensourcesolarpunk.com/circuit-forge/snipe-web:${{ gitea.ref_name }}
+            git.opensourcesolarpunk.com/circuit-forge/snipe-web:latest
+
+      - name: Create Forgejo release
+        env:
+          FORGEJO_RELEASE_TOKEN: ${{ secrets.FORGEJO_RELEASE_TOKEN }}
+          TAG: ${{ gitea.ref_name }}
+        run: |
+          body=$(cat CHANGES.md | python3 -c "import sys, json; print(json.dumps(sys.stdin.read()))")
+          curl -sf -X POST \
+            "https://git.opensourcesolarpunk.com/api/v1/repos/Circuit-Forge/snipe/releases" \
+            -H "Authorization: token ${FORGEJO_RELEASE_TOKEN}" \
+            -H "Content-Type: application/json" \
+            -d "{\"tag_name\": \"${TAG}\", \"name\": \"${TAG}\", \"body\": ${body}}"
diff --git a/api/cloud_session.py b/api/cloud_session.py
index 467702f..d3cc8a9 100644
--- a/api/cloud_session.py
+++ b/api/cloud_session.py
@@ -16,8 +16,6 @@ FastAPI usage:
 """
 from __future__ import annotations
 
-import hashlib
-import hmac
 import logging
 import os
 import re
@@ -77,7 +75,6 @@ def compute_features(tier: str) -> SessionFeatures:
     """Compute feature flags from tier. Evaluated server-side; sent to frontend."""
     local = tier == "local"
     paid_plus = local or tier in ("paid", "premium", "ultra")
-    premium_plus = local or tier in ("premium", "ultra")
 
     return SessionFeatures(
         saved_searches=True,  # all tiers get saved searches
diff --git a/api/ebay_webhook.py b/api/ebay_webhook.py
index 0719455..7f59254 100644
--- a/api/ebay_webhook.py
+++ b/api/ebay_webhook.py
@@ -26,11 +26,11 @@ from pathlib import Path
 from typing import Optional
 
 import requests
-from fastapi import APIRouter, Header, HTTPException, Request
 from cryptography.exceptions import InvalidSignature
 from cryptography.hazmat.primitives.asymmetric.ec import ECDSA
 from cryptography.hazmat.primitives.hashes import SHA1
 from cryptography.hazmat.primitives.serialization import load_pem_public_key
+from fastapi import APIRouter, Header, HTTPException, Request
 
 from app.db.store import Store
 
diff --git a/api/main.py b/api/main.py
index e5fd187..1764cfa 100644
--- a/api/main.py
+++ b/api/main.py
@@ -1,8 +1,11 @@
 """Snipe FastAPI — search endpoint wired to ScrapedEbayAdapter + TrustScorer."""
 from __future__ import annotations
 
+import asyncio
+import csv
 import dataclasses
 import hashlib
+import io
 import json as _json
 import logging
 import os
@@ -12,28 +15,25 @@ from concurrent.futures import ThreadPoolExecutor
 from contextlib import asynccontextmanager
 from pathlib import Path
 
-import asyncio
-import csv
-import io
-
-from fastapi import Depends, FastAPI, HTTPException, Request, UploadFile, File
-from fastapi.responses import StreamingResponse
-from pydantic import BaseModel
-from fastapi.middleware.cors import CORSMiddleware
-
-from circuitforge_core.config import load_env
 from circuitforge_core.affiliates import wrap_url as _wrap_affiliate_url
 from circuitforge_core.api import make_feedback_router as _make_feedback_router
+from circuitforge_core.config import load_env
+from fastapi import Depends, FastAPI, File, HTTPException, Request, UploadFile
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import StreamingResponse
+from pydantic import BaseModel
+
+from api.cloud_session import CloudUser, compute_features, get_session
+from api.ebay_webhook import router as ebay_webhook_router
+from app.db.models import SavedSearch as SavedSearchModel
+from app.db.models import ScammerEntry
 from app.db.store import Store
-from app.db.models import SavedSearch as SavedSearchModel, ScammerEntry
 from app.platforms import SearchFilters
-from app.platforms.ebay.scraper import ScrapedEbayAdapter
 from app.platforms.ebay.adapter import EbayAdapter
 from app.platforms.ebay.auth import EbayTokenManager
 from app.platforms.ebay.query_builder import expand_queries, parse_groups
+from app.platforms.ebay.scraper import ScrapedEbayAdapter
 from app.trust import TrustScorer
-from api.cloud_session import CloudUser, compute_features, get_session
-from api.ebay_webhook import router as ebay_webhook_router
 
 load_env(Path(".env"))
 log = logging.getLogger(__name__)
@@ -50,8 +50,8 @@ async def _lifespan(app: FastAPI):
     # Start vision/LLM background task scheduler.
     # background_tasks queue lives in shared_db (cloud) or local_db (local)
     # so the scheduler has a single stable DB path across all cloud users.
+    from api.cloud_session import _LOCAL_SNIPE_DB, CLOUD_MODE, _shared_db_path
     from app.tasks.scheduler import get_scheduler, reset_scheduler
-    from api.cloud_session import CLOUD_MODE, _LOCAL_SNIPE_DB, _shared_db_path
     sched_db = _shared_db_path() if CLOUD_MODE else _LOCAL_SNIPE_DB
     get_scheduler(sched_db)
     log.info("Snipe task scheduler started (db=%s)", sched_db)
@@ -245,9 +245,10 @@ def _enqueue_vision_tasks(
                        trust_scores table in cloud mode.
     """
     import json as _json
+
+    from api.cloud_session import _LOCAL_SNIPE_DB, CLOUD_MODE, _shared_db_path
     from app.tasks.runner import insert_task
     from app.tasks.scheduler import get_scheduler
-    from api.cloud_session import CLOUD_MODE, _shared_db_path, _LOCAL_SNIPE_DB
 
     sched_db = _shared_db_path() if CLOUD_MODE else _LOCAL_SNIPE_DB
     sched = get_scheduler(sched_db)
diff --git a/app/db/models.py b/app/db/models.py
index 3f0acde..08a3eaa 100644
--- a/app/db/models.py
+++ b/app/db/models.py
@@ -1,5 +1,6 @@
 """Dataclasses for all Snipe domain objects."""
 from __future__ import annotations
+
 from dataclasses import dataclass, field
 from typing import Optional
 
diff --git a/app/db/store.py b/app/db/store.py
index b246fa8..981fb72 100644
--- a/app/db/store.py
+++ b/app/db/store.py
@@ -1,5 +1,6 @@
 """Thin SQLite read/write layer for all Snipe models."""
 from __future__ import annotations
+
 import json
 from datetime import datetime, timezone
 from pathlib import Path
@@ -7,7 +8,7 @@ from typing import Optional
 
 from circuitforge_core.db import get_connection, run_migrations
 
-from .models import Listing, Seller, TrustScore, MarketComp, SavedSearch, ScammerEntry
+from .models import Listing, MarketComp, SavedSearch, ScammerEntry, Seller, TrustScore
 
 MIGRATIONS_DIR = Path(__file__).parent / "migrations"
 
diff --git a/app/platforms/__init__.py b/app/platforms/__init__.py
index 93bd054..1ed2dd0 100644
--- a/app/platforms/__init__.py
+++ b/app/platforms/__init__.py
@@ -1,8 +1,10 @@
 """PlatformAdapter abstract base and shared types."""
 from __future__ import annotations
+
 from abc import ABC, abstractmethod
 from dataclasses import dataclass, field
 from typing import Optional
+
 from app.db.models import Listing, Seller
 
 
diff --git a/app/platforms/ebay/adapter.py b/app/platforms/ebay/adapter.py
index 75ccafa..4b729b9 100644
--- a/app/platforms/ebay/adapter.py
+++ b/app/platforms/ebay/adapter.py
@@ -1,10 +1,12 @@
 """eBay Browse API adapter."""
 from __future__ import annotations
+
 import hashlib
 import logging
 from dataclasses import replace
 from datetime import datetime, timedelta, timezone
 from typing import Optional
+
 import requests
 
 log = logging.getLogger(__name__)
@@ -18,7 +20,7 @@ _SHOPPING_API_MAX_PER_SEARCH = 5          # sellers enriched per search call
 _SHOPPING_API_INTER_REQUEST_DELAY = 0.5   # seconds between successive calls
 _SELLER_ENRICH_TTL_HOURS = 24             # skip re-enrichment within this window
 
-from app.db.models import Listing, Seller, MarketComp
+from app.db.models import Listing, MarketComp, Seller
 from app.db.store import Store
 from app.platforms import PlatformAdapter, SearchFilters
 from app.platforms.ebay.auth import EbayTokenManager
diff --git a/app/platforms/ebay/auth.py b/app/platforms/ebay/auth.py
index f04c4cd..c20a06d 100644
--- a/app/platforms/ebay/auth.py
+++ b/app/platforms/ebay/auth.py
@@ -1,8 +1,10 @@
 """eBay OAuth2 client credentials token manager."""
 from __future__ import annotations
+
 import base64
 import time
 from typing import Optional
+
 import requests
 
 EBAY_OAUTH_URLS = {
diff --git a/app/platforms/ebay/normaliser.py b/app/platforms/ebay/normaliser.py
index 99f4921..063a104 100644
--- a/app/platforms/ebay/normaliser.py
+++ b/app/platforms/ebay/normaliser.py
@@ -1,8 +1,10 @@
 """Convert raw eBay API responses into Snipe domain objects."""
 from __future__ import annotations
+
 import json
 from datetime import datetime, timezone
 from typing import Optional
+
 from app.db.models import Listing, Seller
 
 
diff --git a/app/platforms/ebay/scraper.py b/app/platforms/ebay/scraper.py
index 2635f08..1f42f7d 100644
--- a/app/platforms/ebay/scraper.py
+++ b/app/platforms/ebay/scraper.py
@@ -16,7 +16,7 @@ import json
 import logging
 import re
 import time
-from concurrent.futures import ThreadPoolExecutor, as_completed
+from concurrent.futures import ThreadPoolExecutor
 from datetime import datetime, timedelta, timezone
 from typing import Optional
 
@@ -302,7 +302,8 @@ class ScrapedEbayAdapter(PlatformAdapter):
 
         time.sleep(self._delay)
 
-        import subprocess, os
+        import os
+        import subprocess
         display_num = next(_display_counter)
         display = f":{display_num}"
         xvfb = subprocess.Popen(
@@ -313,8 +314,10 @@ class ScrapedEbayAdapter(PlatformAdapter):
         env["DISPLAY"] = display
 
         try:
-            from playwright.sync_api import sync_playwright  # noqa: PLC0415 — lazy: only needed in Docker
-            from playwright_stealth import Stealth            # noqa: PLC0415
+            from playwright.sync_api import (
+                sync_playwright,  # noqa: PLC0415 — lazy: only needed in Docker
+            )
+            from playwright_stealth import Stealth  # noqa: PLC0415
 
             with sync_playwright() as pw:
                 browser = pw.chromium.launch(
diff --git a/app/tasks/runner.py b/app/tasks/runner.py
index beea57a..2b41b4c 100644
--- a/app/tasks/runner.py
+++ b/app/tasks/runner.py
@@ -19,7 +19,6 @@ import logging
 from pathlib import Path
 
 import requests
-
 from circuitforge_core.db import get_connection
 from circuitforge_core.llm import LLMRouter
 
diff --git a/app/tasks/scheduler.py b/app/tasks/scheduler.py
index a45e0ae..74fabd4 100644
--- a/app/tasks/scheduler.py
+++ b/app/tasks/scheduler.py
@@ -5,9 +5,10 @@ from __future__ import annotations
 from pathlib import Path
 
 from circuitforge_core.tasks.scheduler import (
-    TaskScheduler,
+    TaskScheduler,  # re-export for tests
+)
+from circuitforge_core.tasks.scheduler import (
     get_scheduler as _base_get_scheduler,
-    reset_scheduler,  # re-export for tests
 )
 
 from app.tasks.runner import LLM_TASK_TYPES, VRAM_BUDGETS, run_task
diff --git a/app/tiers.py b/app/tiers.py
index b355466..d41eafd 100644
--- a/app/tiers.py
+++ b/app/tiers.py
@@ -14,7 +14,8 @@ Intentionally ungated (free for all):
   - saved_searches          — retention feature; friction cost outweighs gate value
 """
 from __future__ import annotations
-from circuitforge_core.tiers import can_use as _core_can_use, TIERS  # noqa: F401
+
+from circuitforge_core.tiers import can_use as _core_can_use  # noqa: F401
 
 # Feature key → minimum tier required.
 FEATURES: dict[str, str] = {
diff --git a/app/trust/__init__.py b/app/trust/__init__.py
index 8caf0a1..deaa328 100644
--- a/app/trust/__init__.py
+++ b/app/trust/__init__.py
@@ -1,11 +1,14 @@
-from .metadata import MetadataScorer
-from .photo import PhotoScorer
-from .aggregator import Aggregator
-from app.db.models import Seller, Listing, TrustScore
-from app.db.store import Store
 import hashlib
 import math
 
+from app.db.models import Listing, TrustScore
+from app.db.models import Seller as Seller
+from app.db.store import Store
+
+from .aggregator import Aggregator
+from .metadata import MetadataScorer
+from .photo import PhotoScorer
+
 
 class TrustScorer:
     """Orchestrates metadata + photo scoring for a batch of listings."""
diff --git a/app/trust/aggregator.py b/app/trust/aggregator.py
index 974c45f..5153b14 100644
--- a/app/trust/aggregator.py
+++ b/app/trust/aggregator.py
@@ -1,8 +1,10 @@
 """Composite score and red flag extraction."""
 from __future__ import annotations
+
 import json
-from datetime import datetime, timezone
+from datetime import datetime
 from typing import Optional
+
 from app.db.models import Seller, TrustScore
 
 HARD_FILTER_AGE_DAYS = 7
diff --git a/app/trust/metadata.py b/app/trust/metadata.py
index 9ce88a6..f672c6d 100644
--- a/app/trust/metadata.py
+++ b/app/trust/metadata.py
@@ -1,7 +1,9 @@
 """Five metadata trust signals, each scored 0–20."""
 from __future__ import annotations
+
 import json
 from typing import Optional
+
 from app.db.models import Seller
 
 ELECTRONICS_CATEGORIES = {"ELECTRONICS", "COMPUTERS_TABLETS", "VIDEO_GAMES", "CELL_PHONES"}
diff --git a/app/trust/photo.py b/app/trust/photo.py
index 78301b9..9fb541f 100644
--- a/app/trust/photo.py
+++ b/app/trust/photo.py
@@ -1,7 +1,9 @@
 """Perceptual hash deduplication within a result set (free tier, v0.1)."""
 from __future__ import annotations
-from typing import Optional
+
 import io
+from typing import Optional
+
 import requests
 
 try:
diff --git a/app/ui/Search.py b/app/ui/Search.py
index 0b65650..5130d81 100644
--- a/app/ui/Search.py
+++ b/app/ui/Search.py
@@ -1,19 +1,24 @@
 """Main search + results page."""
 from __future__ import annotations
+
 import logging
 import os
 from pathlib import Path
+
 import streamlit as st
 from circuitforge_core.config import load_env
+
 from app.db.store import Store
 from app.platforms import PlatformAdapter, SearchFilters
 from app.trust import TrustScorer
-from app.ui.components.filters import build_filter_options, render_filter_sidebar, FilterState
-from app.ui.components.listing_row import render_listing_row
 from app.ui.components.easter_eggs import (
-    inject_steal_css, check_snipe_mode, render_snipe_mode_banner,
     auction_hours_remaining,
+    check_snipe_mode,
+    inject_steal_css,
+    render_snipe_mode_banner,
 )
+from app.ui.components.filters import FilterState, build_filter_options, render_filter_sidebar
+from app.ui.components.listing_row import render_listing_row
 
 log = logging.getLogger(__name__)
 
diff --git a/app/ui/components/easter_eggs.py b/app/ui/components/easter_eggs.py
index fddf033..4df09a7 100644
--- a/app/ui/components/easter_eggs.py
+++ b/app/ui/components/easter_eggs.py
@@ -22,7 +22,6 @@ import streamlit as st
 
 from app.db.models import Listing, TrustScore
 
-
 # ---------------------------------------------------------------------------
 # 1. Konami → Snipe Mode
 # ---------------------------------------------------------------------------
diff --git a/app/ui/components/filters.py b/app/ui/components/filters.py
index 6756939..09fffbb 100644
--- a/app/ui/components/filters.py
+++ b/app/ui/components/filters.py
@@ -1,9 +1,12 @@
 """Build dynamic filter options from a result set and render the Streamlit sidebar."""
 from __future__ import annotations
+
 import json
 from dataclasses import dataclass, field
 from typing import Optional
+
 import streamlit as st
+
 from app.db.models import Listing, TrustScore
 
 
diff --git a/app/ui/components/listing_row.py b/app/ui/components/listing_row.py
index 17056be..256fb98 100644
--- a/app/ui/components/listing_row.py
+++ b/app/ui/components/listing_row.py
@@ -1,13 +1,17 @@
 """Render a single listing row with trust score, badges, and error states."""
 from __future__ import annotations
+
 import json
 from typing import Optional
 
 import streamlit as st
 
-from app.db.models import Listing, TrustScore, Seller
+from app.db.models import Listing, Seller, TrustScore
 from app.ui.components.easter_eggs import (
-    is_steal, render_steal_banner, render_auction_notice, auction_hours_remaining,
+    auction_hours_remaining,
+    is_steal,
+    render_auction_notice,
+    render_steal_banner,
 )
 
 
diff --git a/app/wizard/setup.py b/app/wizard/setup.py
index 2ac8187..0bd3552 100644
--- a/app/wizard/setup.py
+++ b/app/wizard/setup.py
@@ -1,6 +1,8 @@
 """First-run wizard: collect eBay credentials and write .env."""
 from __future__ import annotations
+
 from pathlib import Path
+
 import streamlit as st
 from circuitforge_core.wizard import BaseWizard
 
diff --git a/pyproject.toml b/pyproject.toml
index 57ae0f6..5154d80 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,9 +25,23 @@ dependencies = [
     "PyJWT>=2.8",
 ]
 
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.0",
+    "ruff>=0.4",
+]
+
 [tool.setuptools.packages.find]
 where = ["."]
 include = ["app*", "api*"]
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"
+
+[tool.ruff.lint]
+# E (pycodestyle) deferred — tighten incrementally once existing violations are resolved
+select = ["F", "I"]
diff --git a/tests/db/test_store.py b/tests/db/test_store.py
index 26e60ac..dd37014 100644
--- a/tests/db/test_store.py
+++ b/tests/db/test_store.py
@@ -1,8 +1,9 @@
-import pytest
 from datetime import datetime, timedelta, timezone
-from pathlib import Path
+
+import pytest
+
+from app.db.models import Listing, MarketComp, Seller
 from app.db.store import Store
-from app.db.models import Listing, Seller, TrustScore, MarketComp
 
 
 @pytest.fixture
diff --git a/tests/platforms/test_ebay_auth.py b/tests/platforms/test_ebay_auth.py
index e16b517..3944c7c 100644
--- a/tests/platforms/test_ebay_auth.py
+++ b/tests/platforms/test_ebay_auth.py
@@ -1,7 +1,9 @@
 import time
-import requests
-from unittest.mock import patch, MagicMock
+from unittest.mock import MagicMock, patch
+
 import pytest
+import requests
+
 from app.platforms.ebay.auth import EbayTokenManager
 
 
diff --git a/tests/platforms/test_ebay_normaliser.py b/tests/platforms/test_ebay_normaliser.py
index ebb75fa..e8b0eaa 100644
--- a/tests/platforms/test_ebay_normaliser.py
+++ b/tests/platforms/test_ebay_normaliser.py
@@ -1,4 +1,5 @@
 import pytest
+
 from app.platforms.ebay.normaliser import normalise_listing, normalise_seller
 
 
diff --git a/tests/platforms/test_ebay_scraper.py b/tests/platforms/test_ebay_scraper.py
index a4c8519..a9cae13 100644
--- a/tests/platforms/test_ebay_scraper.py
+++ b/tests/platforms/test_ebay_scraper.py
@@ -3,16 +3,18 @@
 Uses a minimal HTML fixture mirroring eBay's current s-card markup.
 No HTTP requests are made — all tests operate on the pure parsing functions.
 """
-import pytest
 from datetime import timedelta
+
+import pytest
+from bs4 import BeautifulSoup
+
 from app.platforms.ebay.scraper import (
-    scrape_listings,
-    scrape_sellers,
+    _extract_seller_from_card,
     _parse_price,
     _parse_time_left,
-    _extract_seller_from_card,
+    scrape_listings,
+    scrape_sellers,
 )
-from bs4 import BeautifulSoup
 
 # ---------------------------------------------------------------------------
 # Minimal eBay search results HTML fixture (li.s-card schema)
diff --git a/tests/test_feedback.py b/tests/test_feedback.py
index e5e7e89..f75ff8c 100644
--- a/tests/test_feedback.py
+++ b/tests/test_feedback.py
@@ -4,12 +4,10 @@ from __future__ import annotations
 from collections.abc import Callable
 from unittest.mock import MagicMock, patch
 
+from circuitforge_core.api.feedback import make_feedback_router
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
-from circuitforge_core.api.feedback import make_feedback_router
-
-
 # ── Test app factory ──────────────────────────────────────────────────────────
 
 def _make_client(demo_mode_fn: Callable[[], bool] | None = None) -> TestClient:
diff --git a/tests/test_tasks/test_runner.py b/tests/test_tasks/test_runner.py
index 0a44b7c..c9c13db 100644
--- a/tests/test_tasks/test_runner.py
+++ b/tests/test_tasks/test_runner.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 import json
 import sqlite3
 from pathlib import Path
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
 
 import pytest
 
diff --git a/tests/test_tiers.py b/tests/test_tiers.py
index 11dc250..18c0162 100644
--- a/tests/test_tiers.py
+++ b/tests/test_tiers.py
@@ -1,4 +1,4 @@
-from app.tiers import can_use, FEATURES, LOCAL_VISION_UNLOCKABLE
+from app.tiers import can_use
 
 
 def test_metadata_scoring_is_free():
diff --git a/tests/ui/test_easter_eggs.py b/tests/ui/test_easter_eggs.py
index 9551552..1774002 100644
--- a/tests/ui/test_easter_eggs.py
+++ b/tests/ui/test_easter_eggs.py
@@ -4,10 +4,8 @@ from __future__ import annotations
 import json
 from datetime import datetime, timedelta, timezone
 
-import pytest
-
 from app.db.models import Listing, TrustScore
-from app.ui.components.easter_eggs import is_steal, auction_hours_remaining
+from app.ui.components.easter_eggs import auction_hours_remaining, is_steal
 
 
 def _listing(**kwargs) -> Listing: