---
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review_state: current-until-superseded
---

# Evidence Custody Difference Resolution

## Purpose

Compare two Evidence Packets while preserving provenance, custody history, corroboration, contradictions, supersession, and unresolved disputes.

## Current doctrine

- The public tool is `/evidence-diff`; the machine record is `/evidence-custody-diff.schema.json`.
- Comparison distinguishes added, removed, unchanged, and canonically changed evidence nodes.
- Changed provenance, custody gaps, corroboration changes, contradictions, superseded assessments, and unresolved disputes are separate result classes.
- Identical evidence IDs with different canonical content are review conflicts.
- Resolution never rewrites the original packets; it produces a new explicit resolution record.

## Shared Constraints

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

## Relevant standards

- https://iarpg.com/standard/evidence-custody-difference-resolution
- https://iarpg.com/standard/evidence-custody
- https://iarpg.com/standard/contradiction-handling

## Relevant mission examples

- https://iarpg.com/mission/port-access-anomaly-investigation
- https://iarpg.com/mission/corporate-research-provenance-dispute

## Deep report links

- [Justice System and Warrant Escalation for Rogue Intelligence](../docs/long-term-memory/reports/justice-system-and-warrant-escalation-for-rogue-intelligence.md#recommended-warrant-architecture)
- [Hallucinated AI Quest Design in VR MMORPGs](../docs/long-term-memory/reports/hallucinated-ai-quest-design-in-vr-mmorpgs.md#sanity-check-mechanics-and-skill-based-detection)

## Related UAI records

- [evidence-model.uai](evidence-model.uai)
- [evidence-lab.uai](evidence-lab.uai)
- [counterintelligence.uai](counterintelligence.uai)