# Review: AD-573 Memory Budget Accounting (Re-review #2)

**Prompt:** prompts/ad-573-memory-budget-accounting.md
**Reviewer:** Architect
**Date:** 2026-04-27 (third pass)
**Verdict:** ✅ Approved
**Previous Verdict:** ✅ Approved

## Status
Stable. Per-cycle scope, no instance attribute — explicit. Clean tier model with all four boundaries tested. Disabled-config passthrough explicit. Includes graceful handling for unknown tier names. 14 boundary tests cover the full surface. Explicit "Do NOT modify `_build_user_message()`" guard against scope creep.

## Required
None.

## Recommended
None.

## Nits
- `MemoryBudgetConfig.recall_tiers` reference in the Problem section says "MemoryConfig.recall_tiers (basic/enhanced/full/oracle at line 456 of `src/probos/config.py`)". This is descriptive, not actionable, but if those line numbers drift, the prompt will read as stale. Consider removing the line number.

## Recommendation
Ship it.
