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SPRINT_4400 SUMMARY: Delta Verdicts & Reachability Attestations

Program Overview

Field Value
Program ID 4400
Theme Attestable Change Control: Delta Verdicts & Reachability Proofs
Priority P2 (Medium)
Total Effort ~4 weeks
Advisory Source 19-Dec-2025 - Stella Ops candidate features mapped to moat strength

Strategic Context

This program extends the attestation infrastructure to cover:

  1. Smart-Diff semantic delta — Changes in exploitable surface as signed artifacts
  2. Reachability proofs — Call-path subgraphs as portable evidence

Sprint Breakdown

Sprint ID Title Effort Moat
4400_0001_0001 Signed Delta Verdict Attestation 2 weeks 4
4400_0001_0002 Reachability Subgraph Attestation 2 weeks 4

Dependencies

  • Requires: SPRINT_4300_0001_0001 (OCI Verdict Push)
  • Requires: MaterialRiskChangeDetector (exists)
  • Requires: PathWitnessBuilder (exists)

Outcomes

  1. Delta verdicts become attestable change-control artifacts
  2. Reachability analysis produces portable proof subgraphs
  3. Both can be pushed to OCI registries as referrers

Sprint Series Status: DONE

Created: 2025-12-22