# Vulnerability Explorer architecture

> Based on Epic 6 – Vulnerability Explorer; this specification summarises the ledger model, triage workflows, APIs, and export requirements.

## 1) Ledger data model

- **Collections / tables**
  - `finding_records` – canonical, policy-derived findings enriched with advisory, VEX, SBOM, runtime context. Includes `policyVersion`, `advisoryRawIds`, `vexRawIds`, `sbomComponentId`, and `explainBundleRef`.
  - `finding_history` – append-only state transitions (`new`, `triaged`, `accepted_risk`, `remediated`, `false_positive`, etc.) with timestamps, actor, and justification.
  - `triage_actions` – discrete operator actions (comment, assignment, remediation note, ticket link) with immutable provenance.
  - `remediation_plans` – structured remediation steps (affected assets, deadlines, recommended fixes, auto-generated from SRM/AI hints).
  - `reports` – saved report definitions, export manifests, and signatures.

- **Immutability & provenance** – All updates are append-only; previous state is recoverable. Records capture `tenant`, `artifactId`, `findingKey`, `policyVersion`, `sourceRunId`, `sr mDigest`.

## 2) Triage workflow

1. **Ingest effective findings** from Policy Engine (stream `policy.finding.delta`). Each delta updates `finding_records`, generates history entries, and triggers notification rules.
2. **Prioritisation** uses contextual heuristics: runtime exposure, VEX status, policy severity, AI hints. Stored as `priorityScore` with provenance from Zastava/AI modules.
3. **Assignment & collaboration** – Operators claim findings, add comments, attach evidence, and link tickets. Assignment uses Authority identities and RBAC.
4. **Remediation tracking** – Link remediation plans, record progress, and integrate with Scheduler for follow-up scans once fixes deploy.
5. **Closure** – When Policy or rescans mark finding resolved, system logs closure with explain trace and updates audit ledger.

State machine summary:

```
new -> (triage) triaged -> (remediate) in_progress -> (verify) awaiting_verification -> (scan) remediated
new -> (false_positive) closed_false_positive
new -> (risk_accept) accepted_risk
```

All transitions require justification; certain transitions (accepted risk) require multi-approver workflow defined by Policy Studio.

## 3) APIs

- `GET /v1/findings` — filtered listing with pagination, search (artifact, advisory, priority, status, assignee).
- `GET /v1/findings/{id}` — detail view (policy context, explain trace, evidence timeline).
- `POST /v1/findings/{id}/actions` — create triage action (assign, comment, status change, remediation, ticket link) with DSSE signature support.
- `POST /v1/reports` — generate report artifact (JSON, CSV, PDF) defined by saved templates; records manifest + signature.
- `GET /v1/exports/offline` — stream deterministic bundle for Offline Kit (findings JSON, history, attachments, manifest).

CLI mirrors these endpoints (`stella findings list|view|update|export`). Console UI consumes the same APIs via typed clients.

## 4) AI/automation integration

- Advisory AI contributes remediation hints and conflict explanations stored alongside findings (`aiInsights`).
- Scheduler integration triggers follow-up scans or policy re-evaluation when remediation plan reaches checkpoint.
- Zastava (Differential SBOM) feeds runtime exposure signals to reprioritise findings automatically.

## 5) Observability & compliance

- Metrics: `findings_open_total{severity,tenant}`, `findings_mttr_seconds`, `triage_actions_total{type}`, `report_generation_seconds`.
- Logs: structured with `findingId`, `artifactId`, `advisory`, `policyVersion`, `actor`, `actionType`.
- Audit exports: `audit_log.jsonl` appended whenever state changes; offline bundles include signed audit log and manifest.
- Compliance: accepted risk requires dual approval and stores justification plus expiry reminders (raised through Notify).

## 6) Offline bundle requirements

- Bundle structure:
  - `manifest.json` (hashes, counts, policy version, generation timestamp).
  - `findings.jsonl` (current open findings).
  - `history.jsonl` (state changes).
  - `actions.jsonl` (comments, assignments, tickets).
  - `reports/` (generated PDFs/CSVs).
  - `signatures/` (DSSE envelopes).
- Bundles produced deterministically; Export Center consumes them for mirror profiles.