- Introduced AGENTS.md, README.md, TASKS.md, and implementation_plan.md for Vexer, detailing mission, responsibilities, key components, and operational notes. - Established similar documentation structure for Vulnerability Explorer and Zastava modules, including their respective workflows, integrations, and observability notes. - Created risk scoring profiles documentation outlining the core workflow, factor model, governance, and deliverables. - Ensured all modules adhere to the Aggregation-Only Contract and maintain determinism and provenance in outputs.
		
			
				
	
	
		
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| # Aggregation-Only Contract (AOC) Guardrails
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| The Aggregation-Only Contract keeps ingestion services deterministic and policy-neutral. Use these checkpoints whenever you add or modify backlog items:
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| 1. **Ingestion writes raw facts only.** Concelier and Excititor append immutable observations/linksets. No precedence, severity, suppression, or "safe fix" hints may be computed at ingest time.
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| 2. **Derived semantics live elsewhere.** Policy Engine overlays, Vuln Explorer composition, and downstream reporting layers attach severity, precedence, policy verdicts, and UI hints.
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| 3. **Provenance is mandatory.** Every ingestion write must include original source metadata, digests, and signing/provenance evidence when available. Reject writes lacking provenance.
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| 4. **Deterministic outputs.** Given the same inputs, ingestion must produce identical documents, hashes, and event payloads across reruns.
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| 5. **Guardrails everywhere.** Roslyn analyzers, schema validators, and CI smoke tests should fail builds that attempt forbidden writes.
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| For detailed roles and ownership boundaries, see `AGENTS.md` at the repo root and the module-specific dossiers under `docs/modules/<module>/architecture.md`.
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| Need the full contract? Read the [Aggregation-Only Contract reference](../ingestion/aggregation-only-contract.md) for schemas, error codes, and migration guidance.
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