PC-011: Missing Health Check Methods

[murdore]

Bug Summary

No health check mechanism exists. Errors surface during API calls instead of early validation.

Root Cause

File: src/lib/core/baseProvider.ts No checkHealth() method. Providers don't validate config/connectivity on init.

Affected Providers

All providers

Current Behavior

• Invalid API key: Constructor succeeds, error on first API call
• Network issues: Constructor succeeds, error on first API call
• Invalid model: Constructor succeeds, error on first API call
• No proactive health check

Expected Behavior

Health check method that validates:

1. Configuration (API keys, env vars)
2. Connectivity to provider API
3. Model availability
4. Returns structured health status

Implementation

```typescript export interface ProviderHealthStatus { healthy: boolean; provider: string; checks: { config: { passed: boolean; message?: string }; connectivity: { passed: boolean; message?: string }; modelAvailable: { passed: boolean; message?: string }; }; }

abstract class BaseProvider { async checkHealth(): Promise<ProviderHealthStatus>; protected abstract validateConfig(): Promise; protected abstract testConnectivity(): Promise; protected abstract verifyModelAvailability(): Promise; } ```

CLI command: ```bash neurolink health-check --provider openai ```

Acceptance Criteria

• checkHealth() in BaseProvider
• All providers implement it
• Validates config, connectivity, model
• CLI command created
• Tests pass
• Documentation updated

Priority

Medium - Improves debugging experience

Effort

4 hours