# Implementation Progress
This document tracks the implementation progress of the Google Ads MCP architecture refactor.
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## Phase 1: Split Memory Layer into Resources + Tools ✅
**Status:** Completed
**Date:** 2026-01-29
### Objective
Refactor the Memory layer to properly separate read operations (Resources) from write operations (Tools), aligning with MCP semantics.
### Changes Made
#### 1. Created `src/memory/resources.py`
New file implementing MCP Resources for read-only memory access:
| Resource URI | Description |
|--------------|-------------|
| `memory://changes/recent` | Recent change log entries (last 50) |
| `memory://reports/history` | Historical report snapshots (last 20) |
| `memory://decisions/history` | Past decisions with rationale (last 20) |
| `memory://insights` | Accumulated learnings (last 30) |
| `memory://insights/actionable` | High-confidence insights with recommendations (last 10) |
**Functions exported:**
- `get_memory_resources()` - Returns list of available memory resources
- `read_memory_resource(uri)` - Reads a memory resource by URI
- `register_memory_resources(server)` - Placeholder for Phase 3 integration
#### 2. Created `src/memory/tools.py`
New file consolidating write operations as MCP Tools:
| Tool | Description |
|------|-------------|
| `save_report_snapshot` | Save performance reports for future comparison |
| `log_decision` | Record decisions with rationale and alternatives |
| `update_decision_outcome` | Update the outcome of a past decision |
| `record_learning` | Store insights and learnings with confidence levels |
**Functions exported:**
- `register_memory_tools(server)` - Registers all memory tools with MCP server
#### 3. Updated `src/memory/change_log.py`
- Removed `register_change_log_tools()` function
- Removed `from mcp.server import Server` import
- Kept internal functions: `log_change()`, `get_recent_changes()`
- Updated module docstring to reflect new role as pure data access
#### 4. Updated `src/memory/report_history.py`
- Removed `register_report_history_tools()` function
- Removed `from mcp.server import Server` import
- Kept internal functions: `store_report()`, `get_report_history()`
- Updated module docstring to reflect new role as pure data access
#### 5. Updated `src/memory/decisions.py`
- Removed `register_decision_tools()` function
- Removed `from mcp.server import Server` import
- Kept internal functions: `record_decision()`, `get_decisions()`
- Updated module docstring to reflect new role as pure data access
#### 6. Updated `src/memory/learnings.py`
- Removed `register_learning_tools()` function
- Removed `from mcp.server import Server` import
- Kept internal functions: `add_learning()`, `get_learnings()`
- Updated module docstring to reflect new role as pure data access
#### 7. Updated `src/memory/__init__.py`
- Removed imports of `register_*_tools` functions (no longer exist)
- Removed `register_all_memory_tools()` function
- Added imports: `register_memory_resources`, `register_memory_tools`, `get_memory_resources`, `read_memory_resource`
- Updated `__all__` exports to include new registration functions
### Architecture After Phase 1
```
src/memory/
├── __init__.py # Updated exports
├── database.py # Unchanged
├── resources.py # NEW - MCP Resources (read operations)
├── tools.py # NEW - MCP Tools (write operations)
├── change_log.py # Refactored - internal functions only
├── report_history.py # Refactored - internal functions only
├── decisions.py # Refactored - internal functions only
└── learnings.py # Refactored - internal functions only
```
### Notes for Phase 3
- MCP only allows one `@server.list_resources()` handler globally
- `get_memory_resources()` and `read_memory_resource()` are ready to be combined with knowledge resources in server.py
- `register_memory_tools()` can be called directly from server.py
### Files NOT Modified (as specified)
- `src/knowledge/resources.py` - Not touched
- `src/actions/*` - Not touched
- `src/server.py` - Not touched (Phase 3)
---
## Phase 2: Create Prompts Layer
**Status:** Not Started
---
## Phase 3: Update Server Registration
**Status:** Not Started
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## Phase 4: Update Documentation
**Status:** Not Started
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## Phase 5: Testing & Validation
**Status:** Not Started
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## Phase 6: Implement Governance Layer
**Status:** Not Started
