---
id: capability.audit.event-retain
owner: audit-core
status: draft
domain: infotech
maturity:
  discovery:
    current: D3
    target: D5
    confidence: medium
    rationale: Owner scope, neighboring responsibilities, concrete use cases and limitations
      are documented; no exhaustive or generalized maturity claim.
  availability:
    current: A4
    target: A4
    confidence: medium
    rationale: 'Source interface assessed 2026-10-14: Tenant-aware event ingestion,
      chain integrity, heartbeat and reconciliation. Availability describes the delivery
      form, not production acceptance. Custody after arrival does not prove source
      completeness; freshness bounds integrity assertions.'
external_evidence:
  completeness:
    level: C3
    name: Substantial
    confidence: medium
    basis: live_receiver_and_restore_walk
    satisfied_expectations:
    - HTTP ingest through the backend contract
    - append-only Postgres custody on platform-pg
    - recovery cited to the live platform data.backup provision
    broken_expectations:
    - data.archive sink not provided
    out_of_scope_expectations:
    - application business audit semantics ownership
    - booked-cost origination
  reliability:
    level: R2
    confidence: medium
    basis: failure_matrix_and_restore_walk
    known_reliability_risks:
    - single replica
name: Independent audit custody
summary: Tenant-aware event ingestion, chain integrity, heartbeat and reconciliation.
tags:
- security
- netkingdom
- framework-reuse
discovery:
  intent: Tenant-aware event ingestion, chain integrity, heartbeat and reconciliation
  includes:
  - Tenant-aware event ingestion, chain integrity, heartbeat and reconciliation
  excludes:
  - Custody after arrival does not prove source completeness; freshness bounds integrity
    assertions
  use_cases:
  - 'U08: Consumer emits security events and reconciles independently retained evidence'
  - 'U09: Maintainer observes posture, prioritizes findings, coordinates work and
    verifies outcomes'
  - 'U10: Operator recovers identity, custody or data with independently held recovery
    material'
availability:
  current_level: A4
  target_level: A4
  current_artifacts:
  - SCOPE.md
  - docs/stream-completeness.md
  consumption_modes:
  - HTTP API
  - source
relations:
  related_to:
  - capability.security.approval-lifecycle
  - capability.identity.tenant-facts
  - capability.security.posture-assessment
  - capability.observability.security-signals
evidence:
  documentation:
  - SCOPE.md
  - docs/stream-completeness.md
consumer_guidance:
  recommended_for:
  - Consumer emits security events and reconciles independently retained evidence
  - Maintainer observes posture, prioritizes findings, coordinates work and verifies
    outcomes
  - Operator recovers identity, custody or data with independently held recovery material
  not_recommended_for:
  - Custody after arrival does not prove source completeness; freshness bounds integrity
    assertions
  known_limitations:
  - Custody after arrival does not prove source completeness; freshness bounds integrity
    assertions
  - 2026-10-14 architecture review estimates operational maturity separately; a registry
    entry does not authorize execution or establish deployment.
---

# Independent audit custody

Tenant-aware event ingestion, chain integrity, heartbeat and reconciliation.

## Reuse boundary

Custody after arrival does not prove source completeness; freshness bounds integrity assertions.

## Supported use cases

- U08: Consumer emits security events and reconciles independently retained evidence
- U09: Maintainer observes posture, prioritizes findings, coordinates work and verifies outcomes
- U10: Operator recovers identity, custody or data with independently held recovery material

## Evidence and integration

- [SCOPE.md](../../SCOPE.md)
- [docs/stream-completeness.md](../../docs/stream-completeness.md)

Assessment: CUST-WP-0081, 2026-10-14. Relations identify interfaces to compose; they do not certify native integration. Existing external evidence levels are retained where present. New entries use conservative C1/R0 until consumer assessment exists.