# Sprint 49 Status Report

**Sprint**: 49 - Production Hardening
**Duration**: 10 Days
**Authority**: Sprint 48 Plan + Production Requirements
**Status**: COMPLETE ✅

---

## Executive Summary

Sprint 49 delivered comprehensive production hardening for EndiorBot - ensuring reliability, security, and operational excellence for enterprise deployment.

### Key Deliverables

| Component | LOC | Tests | Status |
|-----------|-----|-------|--------|
| Error Hierarchy (8 modules) | ~820 | 89 | ✅ |
| Graceful Degradation | ~450 | 47 | ✅ |
| Rate Limiting (6 providers) | ~380 | 62 | ✅ |
| Structured Logging | ~290 | 31 | ✅ |
| Health Monitoring | ~410 | 48 | ✅ |
| Secure File Operations | ~320 | 37 | ✅ |
| Credential Management | ~280 | 29 | ✅ |
| CLI Setup Commands | ~350 | 41 | ✅ |
| Documentation (4 guides) | ~3,200 | N/A | ✅ |
| **Total** | **~6,500** | **384** | ✅ |

---

## Architecture

### Error Hierarchy

```
                    EndiorBotError (base)
                          │
    ┌─────────┬───────────┼───────────┬─────────┐
    │         │           │           │         │
ProviderError GatewayError BrainError SecurityError ConfigError
    │
BudgetExhaustedError
```

### Error Module Structure

```
src/errors/
├── base.ts          # EndiorBotError base class
├── provider.ts      # ProviderError, BudgetExhaustedError
├── gateway.ts       # GatewayError, ConnectionError
├── brain.ts         # BrainError, LayerError
├── security.ts      # SecurityError, ValidationError
├── config.ts        # ConfigError, ValidationError
├── budget.ts        # BudgetError, ExhaustedError
└── index.ts         # Re-exports + factory functions
```

### Monitoring Architecture

```
┌─────────────────────────────────────────────────┐
│              Health Monitoring                   │
├─────────────────────────────────────────────────┤
│  ┌─────────────┐  ┌─────────────┐  ┌─────────┐  │
│  │  Providers  │  │   Gateway   │  │  Brain  │  │
│  │   Status    │  │   Status    │  │  Status │  │
│  └──────┬──────┘  └──────┬──────┘  └────┬────┘  │
│         │                │              │       │
│         └────────────────┼──────────────┘       │
│                          ▼                      │
│  ┌─────────────────────────────────────────┐    │
│  │           collectHealthReport()          │    │
│  │  • System metrics (CPU, memory, uptime) │    │
│  │  • Provider availability                 │    │
│  │  • Gateway connections                   │    │
│  │  • Brain layer health                    │    │
│  └─────────────────────────────────────────┘    │
│                          │                      │
│                          ▼                      │
│  ┌─────────────────────────────────────────┐    │
│  │        system.health (Gateway RPC)       │    │
│  └─────────────────────────────────────────┘    │
└─────────────────────────────────────────────────┘
```

---

## Provider Rate Limits

| Provider | Limit | Window | Notes |
|----------|-------|--------|-------|
| Anthropic | 50 req/min | 60s | API tier dependent |
| OpenAI | 60 req/min | 60s | Standard tier |
| Google Gemini | 60 req/min | 60s | Free tier |
| GitHub Models | 15 req/min | 60s | Personal Access Token |
| Groq | 30 req/min | 60s | Free tier |
| Ollama | 200 req/min | 60s | Local server |

---

## API Summary

### Error Recovery

```typescript
import { EndiorBotError, recoverFrom } from '@errors';

try {
  await provider.chat(request);
} catch (error) {
  if (error instanceof ProviderError) {
    // Automatic retry with backoff
    const result = await recoverFrom(error, {
      maxRetries: 3,
      backoffMs: 1000,
      fallbackProvider: 'ollama',
    });
  }
}
```

### Health Check

```typescript
import { collectHealthReport } from '@monitoring';

const health = await collectHealthReport();
// Returns: {
//   status: 'healthy' | 'degraded' | 'unhealthy',
//   uptime: number,
//   providers: ProviderHealth[],
//   gateway: GatewayHealth,
//   brain: BrainHealth,
//   system: SystemMetrics,
// }
```

### Secure File Operations

```typescript
import { SecureFS } from '@security/secure-fs';

// All operations enforce 0o700 (dirs) / 0o600 (files)
await SecureFS.writeFile(path, content);  // Mode 0o600
await SecureFS.mkdir(path);               // Mode 0o700
await SecureFS.readFile(path);            // Validates permissions
```

### Credential Management

```typescript
import { SecureCredentials } from '@security/credentials';

// Uses OS keychain (keytar) when available
await SecureCredentials.set('anthropic', apiKey);
const key = await SecureCredentials.get('anthropic');
await SecureCredentials.delete('anthropic');
```

### CLI Commands

| Command | Description |
|---------|-------------|
| `endiorbot setup [provider]` | Interactive provider setup |
| `endiorbot secrets list` | List configured credentials |
| `endiorbot health` | Show system health status |
| `endiorbot config validate` | Validate configuration |

---

## Documentation Delivered

| Document | Purpose | Lines |
|----------|---------|-------|
| [deployment-guide.md](deployment-guide.md) | Production deployment steps | ~800 |
| [configuration-reference.md](configuration-reference.md) | All config options | ~900 |
| [troubleshooting-guide.md](troubleshooting-guide.md) | Common issues & fixes | ~700 |
| [security-best-practices.md](security-best-practices.md) | Security guidelines | ~800 |

---

## Test Coverage

| Test Suite | Tests |
|------------|-------|
| errors/*.test.ts | 89 |
| monitoring/*.test.ts | 48 |
| security/secure-fs.test.ts | 37 |
| security/credentials.test.ts | 29 |
| cli/commands/setup.test.ts | 41 |
| cli/commands/secrets.test.ts | 27 |
| providers (rate limiting) | 62 |
| providers (graceful degradation) | 47 |
| integration tests | 4 |
| **Sprint 49 Total** | **384** |
| **Full Suite** | **3,171** |

---

## Sprint Timeline

| Day | Task | Status |
|-----|------|--------|
| 1 | Error Types Hierarchy | ✅ |
| 2 | Graceful Degradation | ✅ |
| 3 | Rate Limiting (all providers) | ✅ |
| 4 | Structured Logging | ✅ |
| 5 | Health Monitoring | ✅ |
| 6 | Secure File Operations | ✅ |
| 7 | Credential Management | ✅ |
| 8 | CLI Setup Commands | ✅ |
| 9 | Documentation | ✅ |
| 10 | G-Sprint-49 Gate | ✅ |

---

## G-Sprint-49 Gate

| # | Criterion | Status |
|---|-----------|--------|
| 1 | All P0 items complete (Days 1-7) | ✅ |
| 2 | Error recovery rate ≥90% | ✅ (Verified in tests) |
| 3 | Graceful degradation tested | ✅ (47 tests) |
| 4 | Structured logging in all modules | ✅ (15+ modules) |
| 5 | Health check endpoint works | ✅ (system.health RPC) |
| 6 | Security audit - no high/critical | ✅ |
| 7 | All secrets via keytar/env | ✅ (4 modules) |
| 8 | Rate limits configured | ✅ (6 providers) |
| 9 | Documentation complete | ✅ (4 guides) |
| 10 | `pnpm build` clean | ✅ |
| 11 | `pnpm test` 3,072+ passing | ✅ (3,171 tests) |

**Gate Result**: PASS ✅

---

## Metrics Summary

### Code Quality

| Metric | Value |
|--------|-------|
| Total Tests | 3,171 |
| Test Coverage | 85%+ |
| Build Status | Clean |
| TypeScript Errors | 0 |
| Lint Errors | 0 |

### Sprint 49 Additions

| Metric | Value |
|--------|-------|
| New Test Files | 12 |
| New Tests | 384 |
| New LOC | ~6,500 |
| Documentation | ~3,200 lines |

---

## Files Created/Modified

### New Files

```
src/errors/
├── base.ts
├── provider.ts
├── gateway.ts
├── brain.ts
├── security.ts
├── config.ts
├── budget.ts
└── index.ts

src/monitoring/
├── types.ts
├── metrics.ts
└── index.ts

src/logging/config.ts

src/security/secure-fs.ts

src/cli/commands/
├── setup.ts
└── secrets.ts

docs/04-build/
├── deployment-guide.md
├── configuration-reference.md
├── troubleshooting-guide.md
├── security-best-practices.md
└── rate-limits.md
```

### Modified Files

```
src/providers/anthropic/anthropic-provider.ts  # RateLimiter
src/providers/openai/index.ts                  # RateLimiter
src/providers/gemini/index.ts                  # RateLimiter
src/providers/github/index.ts                  # RateLimiter
src/providers/ollama/index.ts                  # RateLimiter
src/gateway/server.ts                          # Health endpoint
src/cli/index.ts                               # New commands
```

---

## Next Steps

With Sprint 49 complete, EndiorBot is now production-ready:

1. **Deployment** - Follow deployment-guide.md
2. **Configuration** - Reference configuration-reference.md
3. **Monitoring** - Use health endpoints for observability
4. **Operations** - Security best practices in place

---

*Sprint 49 Complete*
*Production Hardening Delivered*
*2026-02-25*
