---
uai: "1.0"
type: topic-memory
status: active
project: iarpg.com
release: "IARPG-OPS-2"
version: "2.0.27-wip"
review_state: current-until-superseded
---

# Migration Regression Fixtures

## Purpose

Preserve deterministic regression coverage for field renames, removals, unknown extensions, invalid UTC timestamps, mixed-release components, duplicate evidence identifiers, and incomplete debrief contracts.

## Current doctrine

- The public migration workbench is `/migrate`; the regression fixtures are under `/migration-regression-fixtures/`.
- Every imported field MUST be mapped, preserved in an explicit extension or unmapped-data structure, or reported as unresolved.
- Unknown extension fields survive migration and merge.
- Invalid timestamps are reported rather than silently normalized into plausible UTC values.
- Duplicate evidence identifiers are a conflict requiring explicit resolution.
- Mixed-release components remain identifiable by original release and version.
- Incomplete debrief contracts remain exportable with explicit findings.

## Shared Constraints

- Apply [repository constraints](constraints.uai#non-negotiable-constraints).

## Relevant standards

- https://iarpg.com/standard/lossless-mission-and-package-migration
- https://iarpg.com/standard/release-migration-and-backward-compatibility
- https://iarpg.com/standard/evidence-custody-difference-resolution

## Relevant mission examples

- https://iarpg.com/mission/port-access-anomaly-investigation
- https://iarpg.com/mission/cross-border-ceasefire-verification

## Deep report links

- [Monetary Architecture, Genesis Allowance, and Economic Stabilization](../docs/long-term-memory/reports/monetary-architecture-genesis-allowance-and-economic-stabilization.md#ledger-schema-and-telemetry)
- [Justice System and Warrant Escalation for Rogue Intelligence](../docs/long-term-memory/reports/justice-system-and-warrant-escalation-for-rogue-intelligence.md#telemetry-and-live-ops-tuning)

## Related UAI records

- [migration.uai](migration.uai)
- [package-merge.uai](package-merge.uai)
- [fixture-testing.uai](fixture-testing.uai)
- [evidence-custody.uai](evidence-custody.uai)