# Shadow Mode Acceptance Schedule: AgentMemoryOS v0.3 → v0.4

## 1. Overview
Shadow Mode is the validation phase where AgentMemoryOS operates in parallel with the Legacy Memory system. All writes are mirrored, but only Legacy Memory provides the primary response. Discrepancies are logged to evaluate the accuracy and performance of the new system.

## 2. Implementation Timeline (Gradual Ramp-up)

| Phase | Duration | Traffic Share | Goal |
| :--- | :--- | :--- | :--- |
| **Phase 1: Silent Mirroring** | 2 Weeks | 0% (Mirror Only) | Baseline stability, latency measurement, and ACL verification. |
| **Phase 2: Early Canary** | 2 Weeks | 20% (Active) | Compare recall precision with legacy output on a subset of users. |
| **Phase 3: Expansion** | 2 Weeks | 50% (Active) | Validate scale performance and memory fragmentation. |
| **Phase 4: Full Cutover** | 1 Week | 100% (Sovereign) | Decommission legacy memory; AgentMemoryOS becomes the primary store. |

**Estimated Full Production Cutover Date:** August 15, 2026.

## 3. Acceptance KPIs (Success Metrics)

### A. Recall Precision (Top-k Hit Rate)
- **Critical Metric:** $\text{Recall} \ge 95\%$ compared to Legacy Memory for factual queries.
- **Target:** Zero degradation in context retrieval accuracy for common user patterns.

### B. Latency (P99 Response Time)
- **Target:** $\text{P99 Latency} \le 200\text{ms}$ for retrieval calls.
- **Threshold:** No more than 10% increase over legacy baseline.

### C. ACL Zero-leakage (Security Breach Audit)
- **Critical Metric:** $0$ instances of cross-session or unauthorized memory leakage.
- **Validation:** Continuous automated "Red Team" probes against the ACL layer.

## 4. Go/No-Go Criteria
- **No-Go:** Any ACL leakage $\to$ Immediate rollback to Phase 1.
- **No-Go:** P99 Latency $> 500\text{ms}$ $\to$ Pause ramp-up for optimization.
- **Go:** Successful completion of Phase 3 with $98\%$ precision and stable latency.