---
id: RAIL-FAB-WP-0013
type: workplan
title: "Path Scoped Duplicate Identity"
domain: railiance
repo: railiance-fabric
status: finished
owner: codex
topic_slug: railiance
planning_priority: high
planning_order: 13
created: "2026-05-20"
updated: "2026-05-20"
state_hub_workstream_id: "bf80900b-606c-442c-aa15-d6272d73a8d6"
---

# RAIL-FAB-WP-0013 - Path Scoped Duplicate Identity

## Goal

Refine discovery reconciliation so path-scoped nodes, starting with `Lockfile`
candidates, are not marked as duplicate entities solely because they share the
same display label.

This unblocks broad local-repo rollout by making rescan review output point to
real identity concerns instead of expected repeated files such as `uv.lock` and
`package-lock.json` across different checkouts.

## Background

`RAIL-FAB-WP-0012` ingested a controlled three-repo baseline into the local
Fabric registry. The only review-required repo was `repo-scoping`; all seven
conflicted candidates were `Lockfile` nodes with labels `uv.lock` or
`package-lock.json` under distinct `var/checkouts/...` paths.

The current duplicate detector compares node kind plus normalized label/alias.
That is useful for semantic declaration nodes, but too broad for file-backed
path-scoped evidence.

## Design Principles

- Keep semantic duplicate detection intact for declaration-like nodes.
- For path-scoped node kinds, require matching source path identity before
  treating same-label nodes as possible duplicates.
- Preserve conservative behavior when source path evidence is missing.
- Add a regression test that mirrors the `repo-scoping` false-positive shape.
- Rerun the controlled baseline before recommending broad rollout.

## Tasks

### T01 - Add Path-Scoped Reconciliation Coverage

```task
id: RAIL-FAB-WP-0013-T01
status: done
priority: high
state_hub_task_id: "8d9cb1c2-77f7-45da-b942-a8d68454477a"
```

Add tests proving that same-label `Lockfile` nodes at different source paths do
not raise `possible_duplicate_node`, while same-label semantic nodes still do.

### T02 - Implement Path-Aware Duplicate Detection

```task
id: RAIL-FAB-WP-0013-T02
status: done
priority: high
state_hub_task_id: "7d4d439d-4f7f-4bdd-bc5f-b02524a10684"
```

Update reconciliation duplicate detection so path-scoped node kinds compare
source anchors before emitting duplicate conflicts.

### T03 - Verify Controlled Rescan

```task
id: RAIL-FAB-WP-0013-T03
status: done
priority: high
state_hub_task_id: "0d6cad1d-16f8-4ac7-b8d3-b62a2f8e4549"
```

Rerun the three-repo controlled rescan against the local registry and confirm
that `repo-scoping` no longer reports the seven lockfile duplicate conflicts.

Verification result:

- Command: `registry scan-manifest registry/local-repos.yaml --repo-slug
  repo-scoping --repo-slug llm-connect --repo-slug railiance-fabric
  --previous-from-registry --ingest --no-lock`.
- Report:
  `registry/.fabric-discovery/reports/2026-05-20t214250z-deterministic.rescan-report.json`.
- Result: 3 scanned, 1 unchanged, 2 changed, 0 retired, 0 conflicted, 0 review
  required.
- `repo-scoping` snapshot `5` still reports 7 changed lockfile candidates, but
  none are conflicted; the previous false `possible_duplicate_node` warnings
  are gone.
- `registry rescan-status --review-only --json` shows 0 review-required repos.

### T04 - Rollout Recommendation

```task
id: RAIL-FAB-WP-0013-T04
status: done
priority: medium
state_hub_task_id: "4be31147-b060-4b47-9589-8d3d8024879d"
```

Record whether broad all-local-repo baseline ingestion is ready after the
identity refinement, or whether another targeted blocker remains.

Recommendation:

- Broad all-local-repo baseline ingestion is ready to attempt as an ingest-only
  operational run.
- Keep `--previous-from-registry`, `--ingest`, and no `--accept` for the broad
  pass; review `registry rescan-status --review-only` before any projection.
- Use safe projection only for clean repos with accepted repo-declaration
  candidates. Do not project candidate-only repositories until their discoveries
  are reviewed or explicitly accepted.

## Close Criteria

- Unit tests cover path-scoped duplicate identity.
- Reconciliation keeps semantic duplicate warnings intact.
- Controlled rescan no longer flags distinct lockfiles as duplicates.
- State Hub and this workplan capture the updated rollout recommendation.