Regulatory Segments

Regulatory Segments connect three previously isolated layers of Trust Relay into a coherent pipeline: service catalog (verticals and services) → Lex corpus (regulations and articles) → investigation pipeline (prompts, agents, risk calibration, EVOI, document resolution).

Each segment is a declarative YAML profile compiled at case creation time into a frozen, SHA-256 hashed CompiledSegmentProfile that tailors every aspect of the investigation to the case's vertical, country, and selected services.

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Architecture Overview

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Service Catalog — 6 Verticals

The MASTER_SERVICE_CATALOG (now sourced from the trustrelay-models shared package and re-exported via app/models/service_catalog.py) defines 6 verticals with 27 services:

Vertical	Services	Template	Key Regulations
Banking	Corporate KYB, Correspondent Banking, Trade Finance, Private Banking, Institutional Lending	banking_kyb_onboarding	AMLR, CRD IV, AMLD6
Payments (PSP)	Payment Processing, Acquiring, AIS, PIS, E-Money	psp_merchant_onboarding	AMLR, PSD2
High-Value Goods	Precious Metals, Precious Stones, Art & Antiques, Luxury Goods	hvg_dealer_onboarding	AMLR Art. 2(1)(f)
Customs	Direct/Indirect Customs, Fiscal VAT, Warehousing, Excise	customs_fiscal_representative	UCC, AMLR, VAT Directive
Professional Services	Tax Advisory, Accounting, Legal, Audit	legal_representative_onboarding	AMLR Art. 3
Precious Metals Trading	Retail PM Sales, Legal Entity, Tax Capsule, IBAN VoP	precious_metals_dealer	AMLR, Belgian WitWas

Each service carries a risk_weight (0.5–2.0) and regulatory_refs (freeform article references).

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Segment Profiles — YAML Declaration

Each segment is a YAML file in config/segments/. Resolution order when a case is created:

Profile Library

Profile	Vertical	Country	EVOI FN Cost	Key Feature
default.yaml	general	all	10,000 (global)	Static regulatory basis fallback
default_banking.yaml	banking	all	15,000	CRD IV governance, financial health enhanced
default_psp.yaml	payments	all	12,000	MCC classification, PSD2 obligations
default_hvg.yaml	high_value_goods	all	15,000	Cash transaction monitoring, source of wealth
default_customs.yaml	customs	all	12,000	UCC establishment, VAT verification
default_professional.yaml	professional_services	all	10,000 (global)	Professional body registration
cz_banking_kyb.yaml	banking	CZ	20,000	CZ-AML source of funds, 10-year retention
be_precious_metals.yaml	precious_metals_trading	BE	18,000	WitWas Art. 5/8/26, CTIF-CFI reporting

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Compiled Profile — Audit Trail

The CompiledSegmentProfile is frozen (immutable) and carries two SHA-256 hashes:

• input_hash — SHA-256 of the canonical JSON representation of the source YAML profile
• profile_hash — SHA-256 of the compiled output (excluding the hash itself)

These satisfy EU AI Act Article 12 (record-keeping): an auditor can verify that a stored compiled profile was produced from a specific YAML input without re-running the compiler.

EU AI Act Article	Requirement	How Segment Profile Satisfies It
Art. 11	Technical documentation	Profile documents which regulations were applied and why
Art. 12	Record-keeping	input_hash + profile_hash enable reproducibility
Art. 13	Transparency	Officers see which regulations govern their investigation
Art. 14	Human oversight	decision_labels are segment-specific, not generic

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Pipeline Integration

Dynamic Regulatory Basis

The _regulatory_basis.jinja2 template renders the segment's regulatory basis table when present:

{% if segment_profile and segment_profile.regulatory_basis_table %}
| Verification Task | Regulation | Article | Requirement |
{% for row in segment_profile.regulatory_basis_table %}
| {{ row.task }} | {{ row.regulation }} | {{ row.article }} | {{ row.requirement }} |
{% endfor %}
{% else %}
{# Static fallback for cases without segments #}
{% endif %}

EVOI Calibration

The UtilityFunction.with_calibration() method overrides cost parameters per segment (values from each profile's evoi_calibration block in config/segments/):

• Default / Professional Services: cost_false_negative = 10,000 (50x asymmetry; no explicit evoi_calibration, falls back to the model default)
• Customs / PSP: cost_false_negative = 12,000
• Banking / HVG: cost_false_negative = 15,000
• BE Precious Metals: cost_false_negative = 18,000
• CZ Banking: cost_false_negative = 20,000 (highest configured penalty)

Higher false-negative costs make the EVOI engine recommend more investigation agents, because the cost of missing a risky entity is higher.

EBA Risk Calibration

The apply_risk_calibration() function multiplies dimension weights by segment-specific factors:

• CZ Banking: geographic_weight_multiplier = 1.2 (Czech jurisdictional risk elevated)
• HVG Dealers: customer_weight_multiplier = 1.3, transaction_weight_multiplier = 1.4 (cash-heavy business model)
• Customs: geographic_weight_multiplier = 1.2 (cross-border risk)

Weights are re-normalized to sum to 1.0 after applying multipliers.

OSINT-First Document Resolution

When document_resolution.strategy = "osint_first":

1. Check which documents are auto-retrievable for this country (e.g., CZ: incorporation_cert, ubo_declaration)
2. After OSINT investigation, check confidence per document
3. Only request documents where OSINT confidence < threshold (default 0.8)
4. Always request always_required_docs (e.g., director_id)

This implements Cedric Neve's feedback: "only request documents OSINT can't find."

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Frontend Integration

Segment Badge (CaseHeader)

The case header displays the segment's vertical and primary regulations as a violet badge:

Banking · CZ — AMLR · CZ-AML · CRD IV

Case-Aware Regulatory Tab

When navigating from a case to /dashboard/regulatory?vertical=banking&country=CZ, the regulatory tab auto-filters to show applicable regulations. A context banner indicates the active filter.

Case Creation

The CreateCaseDialog passes the template's vertical in additional_data, enabling the backend segment compiler to resolve the correct profile.

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Key Files

File	Responsibility
app/models/segment_profile.py	13 Pydantic models (YAML input + compiled output)
app/services/segment_compiler.py	YAML loading, segment resolution, Lex resolution, SHA-256 hashing
app/models/service_catalog.py	6 verticals, 27 services in MASTER_SERVICE_CATALOG (re-exported from trustrelay-models)
config/segments/*.yaml	8 segment profiles (3 defaults + 5 vertical-specific)
app/prompts/templates/_regulatory_basis.jinja2	Dynamic regulatory basis with static fallback
app/models/evoi.py	UtilityFunction.with_calibration()
app/services/eba_risk_matrix.py	apply_risk_calibration()
app/services/model_tiers.py	get_model_for_agent(override_tier=)
app/services/document_gap_analyzer.py	filter_by_osint_coverage()

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Testing — 47 Tests

Test File	Tests	What It Verifies
test_segment_compiler.py	25	Model parsing, YAML loading, compiler resolution, Lex resolution, hashing
test_segment_deep.py	12	EVOI behavioral impact, risk calibration math, prompt rendering per segment
test_segment_pipeline.py	8	Risk calibration in reassessment, EVOI caution shift, OSINT-first filtering
test_segment_integration.py	2	End-to-end compilation, JSON serialization