# Context Recall Models Migration Report

**Date:** 2026-01-16
**Migration Revision ID:** a0dfb0b4373c
**Status:** SUCCESS

## Migration Summary

Successfully generated and applied database migration for Context Recall functionality, adding 4 new tables to the ClaudeTools schema.

### Migration Details

- **Previous Revision:** 48fab1bdfec6 (Initial schema - 38 tables)
- **Current Revision:** a0dfb0b4373c (head)
- **Migration Name:** add_context_recall_models
- **Database:** MariaDB 12.1.2 on 172.16.3.20:3306
- **Generated:** 2026-01-16 16:51:48

## Tables Created

### 1. conversation_contexts
**Purpose:** Store conversation context from AI agent sessions

**Columns (13):**
- `id` (CHAR 36, PRIMARY KEY)
- `session_id` (VARCHAR 36, FK -> sessions.id)
- `project_id` (VARCHAR 36, FK -> projects.id)
- `machine_id` (VARCHAR 36, FK -> machines.id)
- `context_type` (VARCHAR 50, NOT NULL)
- `title` (VARCHAR 200, NOT NULL)
- `dense_summary` (TEXT)
- `key_decisions` (TEXT)
- `current_state` (TEXT)
- `tags` (TEXT)
- `relevance_score` (FLOAT, default 1.0)
- `created_at` (DATETIME)
- `updated_at` (DATETIME)

**Indexes (5):**
- idx_conversation_contexts_session (session_id)
- idx_conversation_contexts_project (project_id)
- idx_conversation_contexts_machine (machine_id)
- idx_conversation_contexts_type (context_type)
- idx_conversation_contexts_relevance (relevance_score)

**Foreign Keys (3):**
- session_id -> sessions.id (SET NULL on delete)
- project_id -> projects.id (SET NULL on delete)
- machine_id -> machines.id (SET NULL on delete)

---

### 2. context_snippets
**Purpose:** Store reusable context snippets for quick retrieval

**Columns (12):**
- `id` (CHAR 36, PRIMARY KEY)
- `project_id` (VARCHAR 36, FK -> projects.id)
- `client_id` (VARCHAR 36, FK -> clients.id)
- `category` (VARCHAR 100, NOT NULL)
- `title` (VARCHAR 200, NOT NULL)
- `dense_content` (TEXT, NOT NULL)
- `structured_data` (TEXT)
- `tags` (TEXT)
- `relevance_score` (FLOAT, default 1.0)
- `usage_count` (INTEGER, default 0)
- `created_at` (DATETIME)
- `updated_at` (DATETIME)

**Indexes (5):**
- idx_context_snippets_project (project_id)
- idx_context_snippets_client (client_id)
- idx_context_snippets_category (category)
- idx_context_snippets_relevance (relevance_score)
- idx_context_snippets_usage (usage_count)

**Foreign Keys (2):**
- project_id -> projects.id (SET NULL on delete)
- client_id -> clients.id (SET NULL on delete)

---

### 3. project_states
**Purpose:** Track current state and progress of projects

**Columns (12):**
- `id` (CHAR 36, PRIMARY KEY)
- `project_id` (VARCHAR 36, FK -> projects.id, UNIQUE)
- `last_session_id` (VARCHAR 36, FK -> sessions.id)
- `current_phase` (VARCHAR 100)
- `progress_percentage` (INTEGER, default 0)
- `blockers` (TEXT)
- `next_actions` (TEXT)
- `context_summary` (TEXT)
- `key_files` (TEXT)
- `important_decisions` (TEXT)
- `created_at` (DATETIME)
- `updated_at` (DATETIME)

**Indexes (4):**
- project_id (UNIQUE INDEX on project_id)
- idx_project_states_project (project_id)
- idx_project_states_last_session (last_session_id)
- idx_project_states_progress (progress_percentage)

**Foreign Keys (2):**
- project_id -> projects.id (CASCADE on delete)
- last_session_id -> sessions.id (SET NULL on delete)

**Note:** One-to-one relationship with projects table via UNIQUE constraint

---

### 4. decision_logs
**Purpose:** Log important decisions made during development

**Columns (11):**
- `id` (CHAR 36, PRIMARY KEY)
- `project_id` (VARCHAR 36, FK -> projects.id)
- `session_id` (VARCHAR 36, FK -> sessions.id)
- `decision_type` (VARCHAR 100, NOT NULL)
- `impact` (VARCHAR 50, default 'medium')
- `decision_text` (TEXT, NOT NULL)
- `rationale` (TEXT)
- `alternatives_considered` (TEXT)
- `tags` (TEXT)
- `created_at` (DATETIME)
- `updated_at` (DATETIME)

**Indexes (4):**
- idx_decision_logs_project (project_id)
- idx_decision_logs_session (session_id)
- idx_decision_logs_type (decision_type)
- idx_decision_logs_impact (impact)

**Foreign Keys (2):**
- project_id -> projects.id (SET NULL on delete)
- session_id -> sessions.id (SET NULL on delete)

---

## Verification Results

### Table Creation
- **Expected Tables:** 4
- **Tables Created:** 4
- **Status:** ✓ SUCCESS

### Structure Validation
All tables include:
- ✓ Proper column definitions with correct data types
- ✓ All specified indexes created successfully
- ✓ Foreign key constraints properly configured
- ✓ Automatic timestamp columns (created_at, updated_at)
- ✓ UUID primary keys (CHAR 36)

### Basic Operations Test
Tested on `conversation_contexts` table:
- ✓ INSERT operation successful
- ✓ SELECT operation successful
- ✓ DELETE operation successful
- ✓ Data integrity verified

## Migration Files

**Migration File:**
```
D:\ClaudeTools\migrations\versions\a0dfb0b4373c_add_context_recall_models.py
```

**Configuration:**
```
D:\ClaudeTools\alembic.ini
```

## Total Schema Statistics

- **Total Tables in Database:** 42 (38 original + 4 new)
- **Total Indexes Added:** 18
- **Total Foreign Keys Added:** 9

## Migration History

```
<base> -> 48fab1bdfec6, Initial schema - 38 tables
48fab1bdfec6 -> a0dfb0b4373c (head), add_context_recall_models
```

## Warnings & Issues

**None** - Migration completed without warnings or errors.

## Next Steps

The Context Recall models are now ready for use:

1. **API Integration:** Implement CRUD endpoints in FastAPI
2. **Service Layer:** Create business logic for context retrieval
3. **Testing:** Add comprehensive unit and integration tests
4. **Documentation:** Update API documentation with new endpoints

## Notes

- All foreign keys use `SET NULL` on delete except `project_states.project_id` which uses `CASCADE`
- This ensures project state is deleted when the associated project is deleted
- Other references remain but are nullified when parent records are deleted
- Relevance scores default to 1.0 for new records
- Usage counts default to 0 for context snippets
- Decision impact defaults to 'medium'
- Progress percentage defaults to 0

---

**Migration Applied:** 2026-01-16 23:53:30
**Verification Completed:** 2026-01-16 23:53:30
**Report Generated:** 2026-01-16