HighFile-scopePython Plug & play

Move environment configuration to startup

Load and validate environment/config once during startup; inject settings into modules instead of re-reading env.

Why this matters

Ensures consistency and surfaces misconfiguration early.

Side-by-side examples engineers can pattern-match during review.

Avoid

def handler():
    url = os.getenv('SERVICE_URL')
    ...

Prefer

class Settings(TypedDict):
    SERVICE_URL: str

SETTINGS: Settings = load_and_validate_env()

def handler(settings: Settings = SETTINGS):
    ...

Bad

os.getenv('X') everywhere

Good

SETTINGS = load_env(); use SETTINGS

From the same buckets as this rule.

High
Add explicit environment variable checks
Validate required runtime env vars at container start via an entrypoint script; exit with a clear message on missing values.
config-environmentcontainer-docker-hygiene+1
High
Encrypt PII at rest using application-layer crypto
Encrypt sensitive columns (e.g., email, phone) with managed keys; ensure DB connection enforces TLS. Store only ciphertext; compare via deterministic token/hashes when needed. (GDPR Art. 32)
compliance-gdprsecurity-hardening+1
High
Enforce retention with explicit TTL per data category
PII tables must include an expires_at (or retention_policy) column and a scheduled deletion/archival job aligned to data category. No indefinite retention. (GDPR Art. 5(1)(e))
compliance-gdprprivacy-pii+2