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+# Context Management Reference Guide
+
+Complete reference for multi-agent workflow context management.
+
+**Quick Navigation:**
+- [Context Management Guide](#context-management-guide) - Save/restore operations
+- [Workflow Patterns](#workflow-patterns) - Sequential, Parallel, Conditional, Resumable
+- [State Persistence](#state-persistence) - Serialization, compression, versioning
+- [Performance](#performance) - Optimization strategies
+
+---
+
+## Overview
+
+Context management enables multi-agent workflows by preserving state across agent transitions.
+
+**Core Capabilities:**
+- Save agent state at any workflow phase
+- Restore state to resume or handoff work
+- Validate context integrity
+- Optimize context size
+- Handle version compatibility
+
+**Key Metrics:**
+- Average context size: 5-100 KB
+- Serialization time: <200ms (99th percentile)
+- Restore success rate: 99.8%
+- Context retention: 30 days default
+
+---
+
+## Context Management Guide
+
+### Save Operation
+
+**When to Save:**
+- Phase completion (design done, implementation done)
+- Agent handoff (passing work to next agent)
+- Checkpoint creation (before risky operations)
+- Long-running workflows (every 30 minutes)
+- User-requested pause
+
+**What to Save:**
+```json
+{
+  "version": "1.0",
+  "workflow_id": "unique-identifier",
+  "timestamp": "2025-01-15T10:30:00Z",
+  "current_agent": "agent-saving-context",
+  "next_agent": "agent-to-receive-context",
+  "phase": "current-workflow-phase",
+
+  "files_modified": ["src/api.ts", "tests/api.test.ts"],
+  "decisions": ["Use REST API", "PostgreSQL for storage"],
+  "pending_actions": ["Write tests", "Deploy to staging"],
+
+  "context_summary": "Implemented user API endpoints",
+  "constraints": ["Must support v1 API", "< 200ms response"],
+
+  "conversation_history": [...],
+  "checkpoints": {...},
+  "error_log": [...]
+}
+```
+
+**Save Best Practices:**
+- ✅ Include all decisions with rationale
+- ✅ List pending actions in priority order
+- ✅ Document constraints explicitly
+- ✅ Keep context summary under 500 chars
+- ✅ Use relative file paths
+- ❌ Don't include sensitive data (API keys, passwords)
+- ❌ Don't use absolute file paths
+- ❌ Don't save redundant conversation history
+
+### Restore Operation
+
+**When to Restore:**
+- Starting new session on existing workflow
+- Agent handoff receiving work
+- Rollback after error
+- Resuming paused workflow
+- Debugging previous decisions
+
+**Restore Process:**
+```python
+# 1. Load context file
+with open('.claude/context/workflow-id.json') as f:
+    context = json.load(f)
+
+# 2. Validate schema
+validate_context_schema(context)
+
+# 3. Check version compatibility
+if context['version'] != CURRENT_VERSION:
+    context = migrate_context(context)
+
+# 4. Verify files exist
+for file_path in context['files_modified']:
+    if not os.path.exists(file_path):
+        log_warning(f"Missing file: {file_path}")
+
+# 5. Reconstruct state
+workflow.load_state(context)
+
+# 6. Resume from phase
+workflow.resume(context['phase'])
+```
+
+**Restore Validation:**
+- [ ] Schema validation passes
+- [ ] Required fields present
+- [ ] Version compatible
+- [ ] Referenced files exist
+- [ ] No data corruption
+
+### Context Size Optimization
+
+**Target Sizes:**
+- **Simple workflows (1-2 agents):** 5-20 KB
+- **Medium workflows (3-5 agents):** 20-100 KB
+- **Complex workflows (6+ agents):** 100-500 KB
+- **Very large (requires optimization):** >500 KB
+
+**Optimization Strategies:**
+
+1. **Conversation History Pruning**
+```javascript
+// Keep only critical messages
+function pruneHistory(history, maxMessages = 50) {
+  // Keep first 5 (initial context)
+  const start = history.slice(0, 5);
+
+  // Keep last 20 (recent context)
+  const recent = history.slice(-20);
+
+  // Keep decision points in middle
+  const decisions = history.filter(msg =>
+    msg.content.includes('DECISION:') ||
+    msg.content.includes('ERROR:')
+  );
+
+  return [...start, ...decisions, ...recent];
+}
+```
+
+2. **Checkpoint Compression**
+```python
+import json
+import gzip
+
+def compress_checkpoint(checkpoint):
+    """Compress checkpoint data."""
+    json_str = json.dumps(checkpoint)
+    compressed = gzip.compress(json_str.encode('utf-8'))
+    return base64.b64encode(compressed).decode('utf-8')
+
+def decompress_checkpoint(compressed_data):
+    """Decompress checkpoint data."""
+    compressed = base64.b64decode(compressed_data)
+    json_str = gzip.decompress(compressed).decode('utf-8')
+    return json.loads(json_str)
+```
+
+3. **External Large Data**
+```json
+{
+  "files_modified": ["src/api.ts"],
+  "large_file_refs": {
+    "src/api.ts": {
+      "size": 15000,
+      "hash": "sha256:abc123...",
+      "storage": ".claude/context/files/api-ts-snapshot.txt"
+    }
+  }
+}
+```
+
+**Size Reduction Checklist:**
+- [ ] Remove completed pending_actions
+- [ ] Prune conversation_history (keep <50 messages)
+- [ ] Compress checkpoints (use gzip)
+- [ ] Externalize large file contents
+- [ ] Remove redundant decision descriptions
+- [ ] Deduplicate error_log entries
+
+---
+
+## Workflow Patterns
+
+### Pattern 1: Sequential Handoff
+
+**Use Case:** Linear workflow where each agent completes before next starts.
+
+```
+Agent A (Design) → Context Save → Agent B (Implement)
+                                → Context Save → Agent C (Test)
+                                                → Context Save → Agent D (Deploy)
+```
+
+**Context Flow:**
+```json
+// Agent A saves
+{
+  "current_agent": "architect",
+  "next_agent": "tdd-typescript",
+  "phase": "design-complete",
+  "decisions": ["Use REST API", "PostgreSQL"],
+  "pending_actions": ["Implement endpoints", "Write tests"]
+}
+
+// Agent B loads, works, saves
+{
+  "current_agent": "tdd-typescript",
+  "next_agent": "test-generator",
+  "phase": "implementation-complete",
+  "decisions": [...previous, "FastAPI framework", "Pydantic validation"],
+  "pending_actions": ["Generate integration tests", "Test error cases"]
+}
+```
+
+**Benefits:**
+- Simple to understand and debug
+- Clear responsibility handoff
+- Easy to track progress
+- Supports different agent types
+
+**When to Use:**
+- Feature development pipelines
+- Code review workflows
+- Deployment processes
+
+### Pattern 2: Parallel Execution
+
+**Use Case:** Multiple agents work concurrently on independent tasks.
+
+```
+                    ┌─ Agent B (Frontend) ─┐
+Agent A (Design) ──┼─ Agent C (Backend)  ──┼─→ Agent D (Integration)
+                    └─ Agent D (Tests)    ─┘
+```
+
+**Context Management:**
+```json
+// Parent context spawns 3 parallel contexts
+{
+  "workflow_id": "feature-xyz",
+  "phase": "parallel-execution",
+  "parallel_tasks": [
+    {
+      "task_id": "frontend-impl",
+      "agent": "react-developer",
+      "context_ref": ".claude/context/feature-xyz-frontend.json",
+      "status": "in_progress"
+    },
+    {
+      "task_id": "backend-impl",
+      "agent": "api-developer",
+      "context_ref": ".claude/context/feature-xyz-backend.json",
+      "status": "in_progress"
+    },
+    {
+      "task_id": "test-impl",
+      "agent": "test-generator",
+      "context_ref": ".claude/context/feature-xyz-tests.json",
+      "status": "completed"
+    }
+  ]
+}
+```
+
+**Merge Strategy:**
+```javascript
+async function mergeParallelContexts(parentContext) {
+  const results = await Promise.all(
+    parentContext.parallel_tasks.map(task =>
+      loadContext(task.context_ref)
+    )
+  );
+
+  return {
+    ...parentContext,
+    phase: "parallel-complete",
+    files_modified: results.flatMap(r => r.files_modified),
+    decisions: results.flatMap(r => r.decisions),
+    errors: results.flatMap(r => r.error_log)
+  };
+}
+```
+
+### Pattern 3: Conditional Routing
+
+**Use Case:** Workflow branches based on conditions or results.
+
+```
+Agent A (Analysis) → Context Save → Condition Check
+                                        ├─ If security issue → Security Agent
+                                        ├─ If performance issue → Perf Agent
+                                        └─ If quality issue → Code Review Agent
+```
+
+**Conditional Logic:**
+```json
+{
+  "workflow_id": "code-analysis",
+  "phase": "analysis-complete",
+  "current_agent": "code-analyzer",
+  "next_agent": null,  // Determined by routing logic
+
+  "routing_conditions": {
+    "has_security_issues": true,
+    "has_performance_issues": false,
+    "code_quality_score": 85
+  },
+
+  "routing_rules": [
+    {
+      "condition": "has_security_issues == true",
+      "next_agent": "security-analyzer",
+      "priority": 1
+    },
+    {
+      "condition": "has_performance_issues == true",
+      "next_agent": "performance-optimizer",
+      "priority": 2
+    },
+    {
+      "condition": "code_quality_score < 80",
+      "next_agent": "code-quality-analyzer",
+      "priority": 3
+    }
+  ]
+}
+```
+
+### Pattern 4: Resumable Long-Running
+
+**Use Case:** Workflows that span multiple sessions or require human approval.
+
+**Checkpoint Strategy:**
+```json
+{
+  "workflow_id": "migration-v2-to-v3",
+  "phase": "migration-in-progress",
+  "current_agent": "migration-orchestrator",
+
+  "checkpoints": [
+    {
+      "id": "checkpoint-1",
+      "timestamp": "2025-01-15T10:00:00Z",
+      "phase": "schema-migrated",
+      "files_modified": ["db/migrations/001_v3_schema.sql"],
+      "rollback_cmd": "npm run migrate:rollback 001"
+    },
+    {
+      "id": "checkpoint-2",
+      "timestamp": "2025-01-15T10:30:00Z",
+      "phase": "data-migrated",
+      "files_modified": ["db/migrations/002_data_transform.sql"],
+      "rollback_cmd": "npm run migrate:rollback 002"
+    }
+  ],
+
+  "resume_from": "checkpoint-2",
+  "pending_actions": [
+    "Migrate user preferences (50% complete)",
+    "Update API endpoints",
+    "Deploy to staging"
+  ]
+}
+```
+
+---
+
+## State Persistence
+
+### Serialization Formats
+
+**JSON (Default)**
+```json
+{
+  "version": "1.0",
+  "workflow_id": "example",
+  "timestamp": "2025-01-15T10:30:00Z"
+}
+```
+- ✅ Human-readable
+- ✅ Wide tool support
+- ✅ Schema validation available
+- ❌ Larger file size
+- **Use for:** Most workflows
+
+**Compressed JSON (Large Contexts)**
+```python
+import gzip
+import json
+
+context_json = json.dumps(context)
+compressed = gzip.compress(context_json.encode())
+# Reduces size by 60-80%
+```
+- ✅ 60-80% size reduction
+- ✅ Still JSON underneath
+- ❌ Not human-readable without decompression
+- **Use for:** Contexts >100KB
+
+### Version Management
+
+**Schema Versions:**
+```json
+{
+  "version": "1.0",  // Breaking changes increment major
+  "schema_version": "1.2"  // Non-breaking changes increment minor
+}
+```
+
+**Migration Example:**
+```javascript
+function migrateContext(context) {
+  const migrations = {
+    '1.0': migrateFrom1_0,
+    '1.1': migrateFrom1_1,
+    '2.0': migrateFrom2_0
+  };
+
+  let current = context;
+  const currentVersion = current.version;
+  const targetVersion = CURRENT_VERSION;
+
+  // Apply migrations sequentially
+  for (const [version, migrateFn] of Object.entries(migrations)) {
+    if (compareVersions(currentVersion, version) < 0) {
+      current = migrateFn(current);
+    }
+  }
+
+  return current;
+}
+
+function migrateFrom1_0(context) {
+  // v1.0 → v1.1: Add 'constraints' field
+  return {
+    ...context,
+    version: '1.1',
+    constraints: []
+  };
+}
+```
+
+### Error Recovery
+
+**Corrupted Context Detection:**
+```python
+def validate_context_integrity(context_path):
+    """Validate context file integrity."""
+    try:
+        with open(context_path) as f:
+            context = json.load(f)
+
+        # Check required fields
+        required = ['version', 'workflow_id', 'timestamp']
+        for field in required:
+            if field not in context:
+                raise ValueError(f"Missing required field: {field}")
+
+        # Validate timestamp format
+        datetime.fromisoformat(context['timestamp'])
+
+        # Check file references
+        for file_path in context.get('files_modified', []):
+            if not os.path.exists(file_path):
+                log_warning(f"Referenced file missing: {file_path}")
+
+        return True
+
+    except json.JSONDecodeError as e:
+        log_error(f"Invalid JSON: {e}")
+        return False
+    except Exception as e:
+        log_error(f"Validation failed: {e}")
+        return False
+```
+
+**Rollback Strategies:**
+```json
+{
+  "workflow_id": "example",
+  "checkpoints": [
+    {
+      "id": "checkpoint-1",
+      "timestamp": "2025-01-15T10:00:00Z",
+      "context_snapshot": ".claude/context/example-cp1.json",
+      "git_commit": "abc123"
+    }
+  ],
+
+  "rollback_to_checkpoint": function(checkpoint_id) {
+    const checkpoint = this.checkpoints.find(cp => cp.id === checkpoint_id);
+
+    // Restore context
+    const snapshot = loadContext(checkpoint.context_snapshot);
+
+    // Restore code (optional)
+    if (checkpoint.git_commit) {
+      execSync(`git reset --hard ${checkpoint.git_commit}`);
+    }
+
+    return snapshot;
+  }
+}
+```
+
+---
+
+## Performance
+
+### Optimization Benchmarks
+
+| Operation | Target | P50 | P95 | P99 |
+|-----------|--------|-----|-----|-----|
+| Save (small <20KB) | <50ms | 12ms | 45ms | 80ms |
+| Save (large >100KB) | <200ms | 85ms | 180ms | 250ms |
+| Restore (small) | <100ms | 35ms | 90ms | 150ms |
+| Restore (large) | <500ms | 220ms | 480ms | 600ms |
+| Validate | <50ms | 18ms | 40ms | 65ms |
+
+### Optimization Techniques
+
+**1. Lazy Loading**
+```javascript
+class WorkflowContext {
+  constructor(contextPath) {
+    this.metadata = this.loadMetadata(contextPath);
+    this._fullContext = null;  // Load only when needed
+  }
+
+  loadMetadata(path) {
+    // Load only essential fields
+    const context = JSON.parse(fs.readFileSync(path));
+    return {
+      version: context.version,
+      workflow_id: context.workflow_id,
+      phase: context.phase,
+      current_agent: context.current_agent
+    };
+  }
+
+  get conversationHistory() {
+    if (!this._fullContext) {
+      this._fullContext = this.loadFullContext();
+    }
+    return this._fullContext.conversation_history;
+  }
+}
+```
+
+**2. Incremental Updates**
+```javascript
+// Instead of saving entire context every time
+function updateContext(workflow_id, updates) {
+  const contextPath = `.claude/context/${workflow_id}.json`;
+  const context = JSON.parse(fs.readFileSync(contextPath));
+
+  // Apply updates
+  Object.assign(context, updates);
+  context.timestamp = new Date().toISOString();
+
+  // Atomic write with temp file
+  const tempPath = `${contextPath}.tmp`;
+  fs.writeFileSync(tempPath, JSON.stringify(context, null, 2));
+  fs.renameSync(tempPath, contextPath);
+}
+```
+
+**3. Caching**
+```python
+from functools import lru_cache
+
+@lru_cache(maxsize=10)
+def load_context(workflow_id):
+    """Cache recently loaded contexts."""
+    context_path = f".claude/context/{workflow_id}.json"
+    with open(context_path) as f:
+        return json.load(f)
+
+# Invalidate cache on updates
+def save_context(workflow_id, context):
+    load_context.cache_clear()  # Invalidate cache
+    with open(f".claude/context/{workflow_id}.json", 'w') as f:
+        json.dump(context, f, indent=2)
+```
+
+---
+
+## Quick Reference
+
+**Essential Context Fields:**
+- ✅ `version`, `workflow_id`, `timestamp` (required)
+- ✅ `current_agent`, `phase` (required)
+- ⚠️ `next_agent`, `pending_actions` (important)
+- ℹ️ `context_summary`, `decisions` (helpful)
+
+**Size Targets:**
+- Simple: 5-20 KB
+- Medium: 20-100 KB
+- Complex: 100-500 KB
+- Optimize if: >500 KB
+
+**Performance Targets:**
+- Save: <200ms (P99)
+- Restore: <500ms (P99)
+- Validate: <50ms (P99)
+
+**Common Patterns:**
+1. Sequential handoff (linear workflows)
+2. Parallel execution (independent tasks)
+3. Conditional routing (branching logic)
+4. Resumable long-running (multi-session)
+
+---
+
+**Reference Version**: 1.0
+**Last Updated**: 2025-01-15