Not another domain to prove agnosticism (Environmental did that) but a DIFFERENT property: can the
SAME capability be fed by many overlapping Requirement Sources at once without the model becoming
unstable? Realistic setup — a supplier with ISO 9001 + IATF 16949 + TISAX + ASPICE + CSMS + SUMS
developing an ECU for OEM X. Seven sources (CRA, UNECE R155/CSMS, R156/SUMS, IATF, TISAX, ASPICE,
OEM X) with deliberate overlap, run through the SAME engine (0 runtime code, data only).
Three new measurements (user-requested):
- Capability Convergence: technical_vulnerability_management = 4 sources across 3 source TYPES
(regulation + certification + contract); secure_signed_update_distribution = 4 sources. The
overlap is where the economic value lives ("one capability replaces five evidence worlds").
- Existing-vs-New: 13/27 required caps reuse existing cyber/environmental MCAPs (48%) -> the
registry is starting to converge; the automotive-specific rest (CSMS/SUMS/ASPICE/functional
safety) is expectedly new (a maturity hint, not an architecture break).
- Business Leverage: a convergent capability satisfies N regulations AND unlocks the OEM market —
more convincing to a GF than "satisfies five laws". (Regulatory Leverage counts regulations;
Business Leverage counts regulations + markets/customers.)
Ledger gains the automotive row (0/0, 14 new types, data_only); stability stays 7/7 = 100%. The
verdict recommends the user's next step: NOT a new domain but PAUSE and analyse the registry for the
cross-domain high-convergence core MCAPs. Non-runtime -> no deploy. 12 tests pass, check-loc 0.
backend-compliance
Python/FastAPI service implementing the DSGVO compliance API: DSR, DSFA, consent, controls, risks, evidence, audit, vendor management, ISMS, change requests, document generation.
Port: 8002 (container: bp-compliance-backend)
Stack: Python 3.12, FastAPI, SQLAlchemy 2.x, Alembic, Keycloak auth.
Architecture
compliance/
├── api/ # Routers (thin, ≤30 LOC per handler)
├── services/ # Business logic
├── repositories/ # DB access
├── domain/ # Value objects, domain errors
├── schemas/ # Pydantic models, split per domain
└── db/models/ # SQLAlchemy ORM, one module per aggregate
The service follows this layered target structure but not all files are fully refactored yet. Phase 1 backlog is tracked in .claude/rules/loc-exceptions.txt (27 backend-compliance files currently excepted).
See ../AGENTS.python.md for the full convention and ../.claude/rules/architecture.md for the non-negotiable rules.
Run locally
cd backend-compliance
pip install -r requirements.txt
export COMPLIANCE_DATABASE_URL=... # Postgres (Hetzner or local)
uvicorn main:app --reload --port 8002
Tests
pytest compliance/tests/ -v
pytest --cov=compliance --cov-report=term-missing
Layout: tests/unit/, tests/integration/, tests/contracts/. Contract tests diff /openapi.json against tests/contracts/openapi.baseline.json.
Public API surface
404+ endpoints across /api/v1/*. Grouped by domain: ai, audit, consent, dsfa, dsr, gdpr, vendor, evidence, change-requests, generation, projects, company-profile, isms. Every path is a contract — see the "Public endpoints" rule in the root CLAUDE.md.
Environment
| Var | Purpose |
|---|---|
COMPLIANCE_DATABASE_URL |
Postgres DSN, sslmode=require |
KEYCLOAK_* |
Auth verification |
QDRANT_URL, QDRANT_API_KEY |
Vector search |
CORE_VALKEY_URL |
Session cache |
Don't touch
Database schema, __tablename__, column names, existing migrations under migrations/. See root CLAUDE.md rule 3.