---
rdr: RDR-002
title: "T2 Status Synchronization"
closed_date: 2026-03-04
close_reason: implemented
---

# Post-Mortem: RDR-002 — T2 Status Synchronization

## RDR Summary

Identified that the RDR lifecycle had no authoritative process store — file frontmatter and T2 memory could silently diverge. Introduced T2-primary architecture: T2 is updated first on every state transition; file frontmatter follows T2.

## Implementation Status

All components implemented: `/nx:rdr-accept` command, gate result storage in T2, `/nx:rdr-list` T2-primary read, and `SessionStart` reconciliation.

## Implementation vs. Plan

| Item | Planned | Delivered | Drift |
|------|---------|-----------|-------|
| `/nx:rdr-accept` command | New skill that verifies T2 gate result before accepting | ✓ Implemented with idempotency and self-healing checks | None |
| Gate result in T2 | `nx memory put ... --title {id}-gate-latest` after every gate | ✓ Stored on every gate run | None |
| `/nx:rdr-list` T2-primary | Read from T2 first, file fallback | ✓ T2 batch API used; file fallback retained | None |
| SessionStart reconciliation | Compare T2 status vs file status; surface mismatches | ✓ Self-healing detection in `rdr-accept` | Reconciliation is opportunistic on accept, not a full scan |

## Drift Classification

Minor: Full SessionStart scan across all RDRs was scoped down to opportunistic self-healing on `/nx:rdr-accept`. Acceptable trade-off — full scans are expensive and the divergence window is narrow.

## RDR Quality Assessment

- Gate caught issues with idempotency edge cases and self-healing direction ambiguity
- T2-primary architecture proved solid in practice — gate results are queryable and auditable
- The "file as secondary" principle means the file can always be regenerated from T2

## Key Takeaways

- T2-primary is the right call: process state (accepted, blocked, gate results) belongs in a queryable store, not free-form YAML
- Idempotency checks (both agree → no-op; file ahead → repair T2; T2 ahead → repair file) cover the real failure modes
- Self-healing on use is more practical than a background reconciliation loop
