# Implementation Plan — Issue #27: Scaffold Memory Service Rust project

## Metadata

| Field | Value |
|---|---|
| Issue | [#27](https://git.shahondin1624.de/llm-multiverse/llm-multiverse/issues/27) |
| Title | Scaffold Memory Service Rust project |
| Milestone | Phase 4: Memory Service |
| Labels | `type:infrastructure`, `priority:high`, `lang:rust`, `service:memory` |
| Status | `COMPLETED` |
| Language | Rust |
| Related Plans | [issue-018.md](issue-018.md), [issue-022.md](issue-022.md) |
| Blocked by | #16 (completed) |

## Acceptance Criteria

- [x] Cargo workspace member created (`services/memory/`)
- [x] Dependency on proto-gen crate
- [x] Tonic gRPC server boilerplate compiles
- [x] Configuration loading (address, port, DuckDB path, embedding endpoint)
- [x] Stub endpoints with input validation for all 3 RPCs

## Architecture Analysis

Follows the same scaffold pattern as audit (#18) and secrets (#22). Memory service has 3 RPCs: QueryMemory (server-streaming), WriteMemory, GetCorrelated. All are stubbed with input validation, returning Unimplemented until DuckDB and retrieval logic are wired in.

## Files to Create/Modify

| File | Action | Purpose |
|---|---|---|
| `Cargo.toml` | Modify | Add services/memory to workspace |
| `services/memory/Cargo.toml` | Create | Memory service crate |
| `services/memory/src/lib.rs` | Create | Module re-exports |
| `services/memory/src/main.rs` | Create | Server entry point |
| `services/memory/src/config.rs` | Create | Config with DuckDB path, embedding endpoint |
| `services/memory/src/service.rs` | Create | MemoryService stub with validation |

## Deviation Log

_(No deviations)_