# BRIEFING — 2026-06-27T07:19:41+09:00

## Mission
Analyze test suite and source of memory_tools.py, construct edge case challenges, and verify correctness, error pathways, and exception handling of memory tools.

## 🔒 My Identity
- Archetype: challenger (critic, specialist)
- Roles: critic, specialist
- Working directory: /Users/sjkim1127/Reversecore_MCP/.agents/challenger_m5_2/
- Original parent: 0c44a811-b4db-47e1-891b-60482d466a84
- Milestone: Milestone 5
- Instance: 2 of 2

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code.
- Find bugs, stress-test assumptions, run verification code ourselves. Do NOT trust the worker's claims or logs.
- Write handoff.md in our working directory.

## Current Parent
- Conversation ID: 0c44a811-b4db-47e1-891b-60482d466a84
- Updated: not yet

## Review Scope
- **Files to review**: `reversecore_mcp/tools/common/memory_tools.py`, `tests/unit/tools/common/test_memory_tools.py`
- **Interface contracts**: PROJECT.md or AGENTS.md

## Key Decisions Made
- Confirmed that FastMCP integration and mock verification is clean.
- Verified four main edge cases empirically: foreign key enforcement, OOM on large binary hashing, FTS5 fallback on invalid queries, and out-of-bounds importance values.

## Attack Surface
- **Hypotheses tested**:
  - SQLite foreign key constraints: Proved that they are not enforced (SQLite allows saving memory with nonexistent session IDs).
  - Large binary hashing: Hashed a 50MB file successfully, but noted that loading entire files into memory can trigger OOM on large files.
  - FTS5 Query fallback: Proved that FTS5 fallback works cleanly by catching errors (e.g., query `'*'`) and falling back to a LIKE query.
  - Importance range limits: Proved that importance levels are not clamped or validated (values like 99 or -5 are saved as-is).
- **Vulnerabilities found**:
  - Silent database integrity breakdown due to lack of `PRAGMA foreign_keys = ON;`.
  - Potential MemoryError/OOM during hashing of extremely large binary paths.
- **Untested angles**:
  - Simultaneous database writes under high lock/concurrency contention (could cause raw SQLite database locked errors to bubble up).

## Loaded Skills
- **Source**: `/Users/sjkim1127/.gemini/config/plugins/google-antigravity-sdk/skills/google-antigravity-sdk/SKILL.md`
- **Local copy**: None (not needed for this code evaluation task)
- **Core methodology**: Multi-agent orchestration and SDK utilization guidelines.

## Artifact Index
- `/Users/sjkim1127/Reversecore_MCP/.agents/challenger_m5_2/handoff.md` — Final handoff report (TBD)
