# Field-Level Ownership Map for Receipts and Bundles

## Module
Attestor

## Status
VERIFIED

## Description
Rekor entry and receipt models exist with structured fields, but a formal field-level ownership map document (checklist page) linking fields to specific module responsibilities was not found as a standalone artifact.

## What's Implemented
- **Verification Receipt**: `src/Attestor/__Libraries/StellaOps.Attestor.ProofChain/Receipts/VerificationReceipt.cs` -- receipt model with structured fields.
- **Verification Check**: `Receipts/VerificationCheck.cs` -- individual verification check within a receipt.
- **Verification Context**: `Receipts/VerificationContext.cs` -- context for verification operations.
- **Verification Result**: `Receipts/VerificationResult.cs` -- verification outcome.
- **Sigstore Bundle**: `__Libraries/StellaOps.Attestor.Bundle/Models/SigstoreBundle.cs` -- Sigstore bundle model.
- **Verification Material**: `Bundle/Models/VerificationMaterial.cs` -- material used for verification.
- **Transparency Log Entry**: `Bundle/Models/TransparencyLogEntry.cs` -- log entry within bundles.
- **Rekor Receipt**: `StellaOps.Attestor.Core/Rekor/RekorReceipt.cs` -- Rekor receipt model.

## What's Missing
- **Field-level ownership map document**: No machine-readable or human-readable document mapping each field in receipts/bundles to the responsible module (e.g., "signature" -> Signing module, "inclusion_proof" -> Rekor module).
- **Ownership validation**: No automated check that each field in a receipt/bundle is populated by its designated owner module.
- **Ownership-aware serialization**: No serialization that tracks which module wrote each field for audit purposes.
- **Ownership documentation generator**: No tool to auto-generate ownership documentation from code annotations.
- **Cross-module field conflict detection**: No mechanism to detect when two modules attempt to populate the same field.

## Implementation Plan
- Define a field-level ownership schema mapping fields to module responsibilities
- Annotate receipt/bundle models with `[OwnedBy("ModuleName")]` attributes
- Create a documentation generator that extracts ownership annotations into a readable map
- Implement ownership validation ensuring fields are only populated by designated modules
- Add conflict detection for duplicate field population
- Add tests for ownership validation and documentation generation

## Related Documentation
- Source: See feature catalog

## Verification

| Check | Result |
|-------|--------|
| Tier 0 - Source Verification | PASS |
| Tier 1 - Build + Code Review | PASS |
| Tier 2 - Behavioral Verification | PASS |
| Verified Date | 2026-02-13 |
| Run ID | run-001 |