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git.stella-ops.org/docs/modules/vex-lens/implementation_plan.md
master 7b5bdcf4d3 feat(docs): Add comprehensive documentation for Vexer, Vulnerability Explorer, and Zastava modules 
- 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.
2025-10-30 00:09:39 +02:00

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Implementation plan — VEX Consensus Lens

Delivery phases

  • Phase 1 – Core lens service
    Build normalisation pipeline (CSAF/OpenVEX/CycloneDX), product mapping library, trust weighting functions, consensus algorithm, and persistence (vex_consensus, history, conflicts).
  • Phase 2 – API & integrations
    Expose /vex/consensus query/detail/simulate/export endpoints, integrate Policy Engine thresholds, Vuln Explorer UI chips, and VEX Lens change events.
  • Phase 3 – Issuer Directory & signatures
    Deliver issuer registry, key management, signature verification, RBAC, audit logs, and tenant overrides.
  • Phase 4 – Console & CLI experiences
    Ship Console module (lists, evidence table, quorum bar, conflicts, simulation drawer) and CLI commands (stella vex consensus ...) with export support.
  • Phase 5 – Recompute & performance
    Implement recompute scheduling (policy activation, Excitator deltas), caching, load tests (10M records/tenant), observability dashboards, and Offline Kit exports.

Work breakdown

  • VEX Lens service
    • Normalise VEX payloads, maintain scope scores, compute consensus digest.
    • Trust weighting functions (issuer tier, freshness decay, scope quality).
    • Idempotent workers for consensus projection and history tracking.
    • Conflict handling queue for manual review and notifications.
  • Integrations
    • Excitator: enrich VEX events with issuer hints, signatures, product trees.
    • Policy Engine: trust knobs, simulation endpoints, policy-driven recompute.
    • Vuln Explorer & Advisory AI: consensus badges, conflict surfacing.
  • Issuer Directory
    • CRUD for issuers/keys, audit logs, import CSAF publishers, tenant overrides.
    • Signature verification endpoints consumed by Lens.
  • APIs & UX
    • REST endpoints for query/detail/conflict export, trust weight updates.
    • Console module with filters, saved views, evidence table, simulation drawer.
    • CLI commands for list/show/simulate/export with JSON/CSV output.
  • Observability & Ops
    • Metrics (consensus latency, conflict rate, signature failures, cache hit rate), logs, traces.
    • Dashboards + runbooks for recompute storms, mapping failures, signature errors, quota breaches.
    • Offline exports for Export Center/Offline Kit.

Acceptance criteria

  • Consensus results reproducible across supported VEX formats with deterministic digests and provenance.
  • Signature verification influences trust weights; unverifiable evidence is down-weighted without pipeline failure.
  • Policy simulations show quorum shifts without persisting state; Vuln Explorer consumes consensus signals.
  • Issuer Directory enforces RBAC, audit logs, and key rotation; CLI & Console parity achieved.
  • Recompute pipeline handles Excitator deltas and policy activations with backpressure and incident surfacing.
  • Observability dashboards/alerts cover ingestion lag, conflict spikes, signature failures, performance budgets (P95 < 500 ms for 100-row pages at 10M records/tenant).

Risks & mitigations

  • Product mapping ambiguity: conservative scope scoring, manual overrides, surfaced warnings, policy review hooks.
  • Issuer compromise: signature verification, trust weighting, tenant overrides, revocation runbooks.
  • Evidence storms: batching, worker sharding, orchestrator rate limiting, priority queues.
  • Performance degradation: caching, indexing, load tests, quota enforcement.
  • Offline gaps: deterministic exports, manifest hashes, Offline Kit tests.

Test strategy

  • Unit: normalisers, mapping, trust weights, consensus lattice, signature verification.
  • Property: randomised evidence sets verifying lattice commutativity and determinism.
  • Integration: Excitator → Lens → Policy/Vuln Explorer flow, issuer overrides, simulation.
  • Performance: large tenant datasets, cache behaviour, concurrency tests.
  • Security: RBAC, tenant scoping, signature tampering, issuer revocation.
  • Offline: export/import verification, CLI parity.

Definition of done

  • Lens service, issuer directory, API/CLI/Console components deployed with telemetry and runbooks.
  • Documentation set (overview, algorithm, issuer directory, API, console, policy trust) updated with imposed rule statements.
  • ./TASKS.md and ../../TASKS.md reflect current status; Offline Kit parity confirmed.