Phase E — Shadow Pipeline & Compaction#

Overview#

Phase E enables safe canonicalization pipeline upgrades and storage compaction.

Components#

1. Shadow Pipeline (src/shadow-pipeline.ts)#

Runs old and new canonicalization pipelines in parallel, compares output, and classifies the upgrade as SAFE / COMPACTION_EVENT / REJECT.

2. Compaction Engine (src/compaction.ts)#

Moves cold data to archives while preserving:

• Node headers, provenance edges, approvals, signatures

Storage tiers: Hot Graph → Ancestry Index → Cold Packs