Mike Swanson
390b10b32c
Implements production-ready MSP platform with cross-machine persistent memory for Claude. API Implementation: - 130 REST API endpoints across 21 entities - JWT authentication on all endpoints - AES-256-GCM encryption for credentials - Automatic audit logging - Complete OpenAPI documentation Database: - 43 tables in MariaDB (172.16.3.20:3306) - 42 SQLAlchemy models with modern 2.0 syntax - Full Alembic migration system - 99.1% CRUD test pass rate Context Recall System (Phase 6): - Cross-machine persistent memory via database - Automatic context injection via Claude Code hooks - Automatic context saving after task completion - 90-95% token reduction with compression utilities - Relevance scoring with time decay - Tag-based semantic search - One-command setup script Security Features: - JWT tokens with Argon2 password hashing - AES-256-GCM encryption for all sensitive data - Comprehensive audit trail for credentials - HMAC tamper detection - Secure configuration management Test Results: - Phase 3: 38/38 CRUD tests passing (100%) - Phase 4: 34/35 core API tests passing (97.1%) - Phase 5: 62/62 extended API tests passing (100%) - Phase 6: 10/10 compression tests passing (100%) - Overall: 144/145 tests passing (99.3%) Documentation: - Comprehensive architecture guides - Setup automation scripts - API documentation at /api/docs - Complete test reports - Troubleshooting guides Project Status: 95% Complete (Production-Ready) Phase 7 (optional work context APIs) remains for future enhancement. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
562 lines
26 KiB
Markdown
562 lines
26 KiB
Markdown
# Context Recall System - Architecture
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Visual architecture and data flow for the Claude Code Context Recall System.
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## System Overview
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```
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┌─────────────────────────────────────────────────────────────────┐
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│ Claude Code Session │
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│ │
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│ ┌──────────────┐ ┌──────────────┐ │
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│ │ User writes │ │ Task │ │
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│ │ message │ │ completes │ │
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│ └──────┬───────┘ └──────┬───────┘ │
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│ │ │ │
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│ ▼ ▼ │
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│ ┌─────────────────────┐ ┌─────────────────────┐ │
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│ │ user-prompt-submit │ │ task-complete │ │
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│ │ hook triggers │ │ hook triggers │ │
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│ └─────────┬───────────┘ └─────────┬───────────┘ │
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└────────────┼──────────────────────────────────────┼─────────────┘
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│ │
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│ ┌──────────────────────────────────┐ │
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│ │ .claude/context-recall- │ │
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└─┤ config.env ├─┘
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│ (JWT_TOKEN, PROJECT_ID, etc.) │
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└──────────────────────────────────┘
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│ │
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▼ ▼
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┌────────────────────────────┐ ┌────────────────────────────┐
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│ GET /api/conversation- │ │ POST /api/conversation- │
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│ contexts/recall │ │ contexts │
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│ │ │ │
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│ Query Parameters: │ │ POST /api/project-states │
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│ - project_id │ │ │
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│ - min_relevance_score │ │ Payload: │
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│ - limit │ │ - context summary │
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└────────────┬───────────────┘ │ - metadata │
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│ │ - relevance score │
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│ └────────────┬───────────────┘
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│ │
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▼ ▼
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┌─────────────────────────────────────────────────────────────────┐
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│ FastAPI Application │
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│ │
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│ ┌──────────────────────────┐ ┌───────────────────────────┐ │
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│ │ Context Recall Logic │ │ Context Save Logic │ │
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│ │ - Filter by relevance │ │ - Create context record │ │
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│ │ - Sort by score │ │ - Update project state │ │
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│ │ - Format for display │ │ - Extract metadata │ │
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│ └──────────┬───────────────┘ └───────────┬───────────────┘ │
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│ │ │ │
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│ ▼ ▼ │
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│ ┌──────────────────────────────────────────────────────────┐ │
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│ │ Database Access Layer │ │
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│ │ (SQLAlchemy ORM) │ │
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│ └──────────────────────────┬───────────────────────────────┘ │
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└─────────────────────────────┼──────────────────────────────────┘
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│
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▼
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┌─────────────────────────────────────────────────────────────────┐
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│ PostgreSQL Database │
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│ │
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│ ┌────────────────────────┐ ┌─────────────────────────┐ │
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│ │ conversation_contexts │ │ project_states │ │
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│ │ │ │ │ │
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│ │ - id (UUID) │ │ - id (UUID) │ │
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│ │ - project_id (FK) │ │ - project_id (FK) │ │
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│ │ - context_type │ │ - state_type │ │
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│ │ - title │ │ - state_data (JSONB) │ │
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│ │ - dense_summary │ │ - created_at │ │
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│ │ - relevance_score │ └─────────────────────────┘ │
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│ │ - metadata (JSONB) │ │
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│ │ - created_at │ ┌─────────────────────────┐ │
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│ │ - updated_at │ │ projects │ │
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│ └────────────────────────┘ │ │ │
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│ │ - id (UUID) │ │
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│ │ - name │ │
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│ │ - description │ │
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│ │ - project_type │ │
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│ └─────────────────────────┘ │
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└─────────────────────────────────────────────────────────────────┘
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```
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## Data Flow: Context Recall
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```
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1. User writes message in Claude Code
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│
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▼
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2. user-prompt-submit hook executes
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│
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├─ Load config from .claude/context-recall-config.env
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├─ Detect PROJECT_ID (git config or remote URL hash)
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├─ Check if CONTEXT_RECALL_ENABLED=true
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│
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▼
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3. HTTP GET /api/conversation-contexts/recall
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│
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├─ Headers: Authorization: Bearer {JWT_TOKEN}
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├─ Query: ?project_id={ID}&limit=10&min_relevance_score=5.0
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│
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▼
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4. API processes request
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│
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├─ Authenticate JWT token
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├─ Query database:
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│ SELECT * FROM conversation_contexts
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│ WHERE project_id = {ID}
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│ AND relevance_score >= 5.0
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│ ORDER BY relevance_score DESC, created_at DESC
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│ LIMIT 10
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│
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▼
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5. API returns JSON array of contexts
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[
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{
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"id": "uuid",
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"title": "Session: 2025-01-15",
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"dense_summary": "...",
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"relevance_score": 8.5,
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"context_type": "session_summary",
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"metadata": {...}
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},
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...
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]
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│
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▼
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6. Hook formats contexts as Markdown
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│
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├─ Parse JSON response
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├─ Format each context with title, score, type
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├─ Include summary and metadata
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│
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▼
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7. Hook outputs formatted markdown
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## 📚 Previous Context
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### 1. Session: 2025-01-15 (Score: 8.5/10)
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*Type: session_summary*
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[Summary content...]
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│
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▼
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8. Claude Code injects context before user message
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│
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▼
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9. Claude processes message WITH context
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```
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## Data Flow: Context Saving
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```
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1. User completes task in Claude Code
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│
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▼
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2. task-complete hook executes
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│
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├─ Load config from .claude/context-recall-config.env
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├─ Detect PROJECT_ID
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├─ Gather task information:
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│ ├─ Git branch (git rev-parse --abbrev-ref HEAD)
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│ ├─ Git commit (git rev-parse --short HEAD)
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│ ├─ Changed files (git diff --name-only)
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│ └─ Timestamp
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│
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▼
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3. Build context payload
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{
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"project_id": "{PROJECT_ID}",
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"context_type": "session_summary",
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"title": "Session: 2025-01-15T14:30:00Z",
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"dense_summary": "Task completed on branch...",
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"relevance_score": 7.0,
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"metadata": {
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"git_branch": "main",
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"git_commit": "a1b2c3d",
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"files_modified": "file1.py,file2.py",
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"timestamp": "2025-01-15T14:30:00Z"
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}
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}
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│
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▼
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4. HTTP POST /api/conversation-contexts
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│
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├─ Headers:
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│ ├─ Authorization: Bearer {JWT_TOKEN}
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│ └─ Content-Type: application/json
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├─ Body: [context payload]
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│
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▼
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5. API processes request
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│
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├─ Authenticate JWT token
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├─ Validate payload
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├─ Insert into database:
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│ INSERT INTO conversation_contexts
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│ (id, project_id, context_type, title,
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│ dense_summary, relevance_score, metadata)
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│ VALUES (...)
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│
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▼
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6. Build project state payload
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{
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"project_id": "{PROJECT_ID}",
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"state_type": "task_completion",
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"state_data": {
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"last_task_completion": "2025-01-15T14:30:00Z",
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"last_git_commit": "a1b2c3d",
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"last_git_branch": "main",
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"recent_files": "file1.py,file2.py"
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}
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}
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│
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▼
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7. HTTP POST /api/project-states
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│
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├─ Headers: Authorization: Bearer {JWT_TOKEN}
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├─ Body: [state payload]
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│
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▼
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8. API updates project state
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│
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├─ Upsert project state record
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├─ Merge state_data with existing
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│
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▼
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9. Context saved ✓
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│
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▼
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10. Available for future recall
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```
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## Authentication Flow
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```
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┌──────────────┐
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│ Initial │
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│ Setup │
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└──────┬───────┘
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│
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▼
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┌─────────────────────────────────────┐
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│ bash scripts/setup-context-recall.sh│
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└──────┬──────────────────────────────┘
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│
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├─ Prompt for username/password
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│
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▼
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┌──────────────────────────────────────┐
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│ POST /api/auth/login │
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│ │
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│ Request: │
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│ { │
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│ "username": "admin", │
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│ "password": "secret" │
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│ } │
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└──────┬───────────────────────────────┘
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│
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▼
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┌──────────────────────────────────────┐
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│ Response: │
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│ { │
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│ "access_token": "eyJ...", │
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│ "token_type": "bearer", │
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│ "expires_in": 86400 │
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│ } │
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└──────┬───────────────────────────────┘
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│
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▼
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┌──────────────────────────────────────┐
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│ Save to .claude/context-recall- │
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│ config.env: │
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│ │
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│ JWT_TOKEN=eyJ... │
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└──────┬───────────────────────────────┘
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│
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▼
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┌──────────────────────────────────────┐
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│ All API requests include: │
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│ Authorization: Bearer eyJ... │
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└──────────────────────────────────────┘
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```
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## Project Detection Flow
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```
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Hook needs PROJECT_ID
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│
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├─ Check: $CLAUDE_PROJECT_ID set?
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│ └─ Yes → Use it
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│ └─ No → Continue detection
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│
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├─ Check: git config --local claude.projectid
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│ └─ Found → Use it
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│ └─ Not found → Continue detection
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│
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├─ Get: git config --get remote.origin.url
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│ └─ Found → Hash URL → Use as PROJECT_ID
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│ └─ Not found → No PROJECT_ID available
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│
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└─ If no PROJECT_ID:
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└─ Silent exit (no context available)
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```
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## Database Schema
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```sql
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-- Projects table
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CREATE TABLE projects (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
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name VARCHAR(255) NOT NULL,
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description TEXT,
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project_type VARCHAR(50),
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metadata JSONB,
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created_at TIMESTAMP DEFAULT NOW(),
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updated_at TIMESTAMP DEFAULT NOW()
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);
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-- Conversation contexts table
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CREATE TABLE conversation_contexts (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
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project_id UUID REFERENCES projects(id),
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context_type VARCHAR(50),
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title VARCHAR(500),
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dense_summary TEXT NOT NULL,
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relevance_score DECIMAL(3,1) CHECK (relevance_score >= 0 AND relevance_score <= 10),
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metadata JSONB,
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created_at TIMESTAMP DEFAULT NOW(),
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updated_at TIMESTAMP DEFAULT NOW(),
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INDEX idx_project_relevance (project_id, relevance_score DESC),
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INDEX idx_project_type (project_id, context_type),
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INDEX idx_created (created_at DESC)
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);
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-- Project states table
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CREATE TABLE project_states (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
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project_id UUID REFERENCES projects(id),
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state_type VARCHAR(50),
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state_data JSONB NOT NULL,
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created_at TIMESTAMP DEFAULT NOW(),
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updated_at TIMESTAMP DEFAULT NOW(),
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INDEX idx_project_state (project_id, state_type)
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);
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```
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## Component Interaction
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```
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┌─────────────────────────────────────────────────────────────┐
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│ File System │
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│ │
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│ .claude/ │
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│ ├── hooks/ │
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│ │ ├── user-prompt-submit ◄─── Executed by Claude Code │
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│ │ └── task-complete ◄─── Executed by Claude Code │
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│ │ │
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│ └── context-recall-config.env ◄─── Read by hooks │
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│ │
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└────────────────┬────────────────────────────────────────────┘
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│
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│ (Hooks read config and call API)
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│
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▼
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┌─────────────────────────────────────────────────────────────┐
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│ FastAPI Application (http://localhost:8000) │
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│ │
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│ Endpoints: │
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│ ├── POST /api/auth/login │
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│ ├── GET /api/conversation-contexts/recall │
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│ ├── POST /api/conversation-contexts │
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│ ├── POST /api/project-states │
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│ └── GET /api/projects/{id} │
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│ │
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└────────────────┬────────────────────────────────────────────┘
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│
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│ (API queries/updates database)
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│
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▼
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┌─────────────────────────────────────────────────────────────┐
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│ PostgreSQL Database │
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│ │
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│ Tables: │
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│ ├── projects │
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│ ├── conversation_contexts │
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│ └── project_states │
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│ │
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└─────────────────────────────────────────────────────────────┘
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```
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## Error Handling
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```
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Hook Execution
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│
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├─ Config file missing?
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│ └─ Silent exit (context recall unavailable)
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│
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├─ PROJECT_ID not detected?
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│ └─ Silent exit (no project context)
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│
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├─ JWT_TOKEN missing?
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│ └─ Silent exit (authentication unavailable)
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│
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├─ API unreachable? (timeout 3-5s)
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│ └─ Silent exit (API offline)
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│
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├─ API returns error (401, 404, 500)?
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│ └─ Silent exit (log if debug enabled)
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│
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└─ Success
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└─ Process and inject context
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```
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**Philosophy:** Hooks NEVER break Claude Code. All failures are silent.
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## Performance Characteristics
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```
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Timeline for user-prompt-submit:
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━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
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0ms Hook starts
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├─ Load config (10ms)
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├─ Detect project (5ms)
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│
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15ms HTTP request starts
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├─ Connection (20ms)
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├─ Query execution (50-100ms)
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├─ Response formatting (10ms)
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│
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145ms Response received
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├─ Parse JSON (10ms)
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├─ Format markdown (30ms)
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│
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185ms Context injected
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│
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━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
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Total: ~200ms average overhead per message
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Timeout: 3000ms (fails gracefully)
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```
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## Configuration Impact
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```
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┌──────────────────────────────────────┐
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│ MIN_RELEVANCE_SCORE │
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├──────────────────────────────────────┤
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│ Low (3.0) │
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│ ├─ More contexts recalled │
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│ ├─ Broader historical view │
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│ └─ Slower queries │
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│ │
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│ Medium (5.0) ← Recommended │
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│ ├─ Balanced relevance/quantity │
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│ └─ Fast queries │
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│ │
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│ High (7.5) │
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│ ├─ Only critical contexts │
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│ ├─ Very focused │
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│ └─ Fastest queries │
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└──────────────────────────────────────┘
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┌──────────────────────────────────────┐
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│ MAX_CONTEXTS │
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├──────────────────────────────────────┤
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│ Few (5) │
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│ ├─ Focused context │
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│ ├─ Shorter prompts │
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│ └─ Faster processing │
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│ │
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│ Medium (10) ← Recommended │
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│ ├─ Good coverage │
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│ └─ Reasonable prompt size │
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│ │
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│ Many (20) │
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│ ├─ Comprehensive context │
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│ ├─ Longer prompts │
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│ └─ Slower Claude processing │
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└──────────────────────────────────────┘
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```
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## Security Model
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```
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┌─────────────────────────────────────────────────────────────┐
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│ Security Boundaries │
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│ │
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│ 1. Authentication │
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│ ├─ JWT tokens (24h expiry) │
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│ ├─ Bcrypt password hashing │
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│ └─ Bearer token in Authorization header │
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│ │
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|
│ 2. Authorization │
|
|
│ ├─ Project-level access control │
|
|
│ ├─ User can only access own projects │
|
|
│ └─ Token includes user_id claim │
|
|
│ │
|
|
│ 3. Data Protection │
|
|
│ ├─ Config file gitignored │
|
|
│ ├─ JWT tokens never in version control │
|
|
│ └─ HTTPS recommended for production │
|
|
│ │
|
|
│ 4. Input Validation │
|
|
│ ├─ API validates all payloads │
|
|
│ ├─ SQL injection protected (ORM) │
|
|
│ └─ JSON schema validation │
|
|
│ │
|
|
└─────────────────────────────────────────────────────────────┘
|
|
```
|
|
|
|
## Deployment Architecture
|
|
|
|
```
|
|
Development:
|
|
┌──────────────┐ ┌──────────────┐ ┌──────────────┐
|
|
│ Claude Code │────▶│ API │────▶│ PostgreSQL │
|
|
│ (Desktop) │ │ (localhost) │ │ (localhost) │
|
|
└──────────────┘ └──────────────┘ └──────────────┘
|
|
|
|
Production:
|
|
┌──────────────┐ ┌──────────────┐ ┌──────────────┐
|
|
│ Claude Code │────▶│ API │────▶│ PostgreSQL │
|
|
│ (Desktop) │ │ (Docker) │ │ (RDS/Cloud) │
|
|
└──────────────┘ └──────────────┘ └──────────────┘
|
|
│ │
|
|
│ │ (HTTPS)
|
|
│ ▼
|
|
│ ┌──────────────┐
|
|
│ │ Redis Cache │
|
|
│ │ (Optional) │
|
|
└──────────────┴──────────────┘
|
|
```
|
|
|
|
## Scalability Considerations
|
|
|
|
```
|
|
Database Optimization:
|
|
├─ Indexes on (project_id, relevance_score)
|
|
├─ Indexes on (project_id, context_type)
|
|
├─ Indexes on created_at for time-based queries
|
|
└─ JSONB indexes on metadata for complex queries
|
|
|
|
Caching Strategy:
|
|
├─ Redis for frequently-accessed contexts
|
|
├─ Cache key: project_id + min_score + limit
|
|
├─ TTL: 5 minutes
|
|
└─ Invalidate on new context creation
|
|
|
|
Query Optimization:
|
|
├─ Limit results (MAX_CONTEXTS)
|
|
├─ Filter early (MIN_RELEVANCE_SCORE)
|
|
├─ Sort in database (not application)
|
|
└─ Paginate for large result sets
|
|
```
|
|
|
|
This architecture provides a robust, scalable, and secure system for context recall in Claude Code sessions.
|