# Concelier AirGap Prep — PREP-CONCELIER-AIRGAP-56-001..58-001

Status: Draft (2025-11-20)
Owners: Concelier Core · AirGap Guilds
Scope: Capture mirror bundle/staleness requirements for Concelier ingestion under sealed mode.

## Dependencies
- Mirror thin bundle milestones (bundle_id, provenance, staleness_budget) from Mirror sprint 56-001.
- AirGap controller staleness/time anchor fields.

## Needed contract
- Ingestion must accept `bundle_id`, `provenance`, `staleness_seconds_remaining` on advisory/linkset endpoints.
- Reject non-mirror sources when sealed; surface `AIRGAP_EGRESS_BLOCKED` per Concelier AirGap response contract.

## Open decisions
- Exact header names for bundle/staleness metadata.
- Whether to cache bundle provenance per tenant.

## Handoff
Use as PREP artefact for 56-001..58-001 chain; update when mirror bundle schema and controller staleness fields are finalized.