[UX]: Add Configuration Validation for Environment Variables

[Kavirubc]

Problem Statement

The configuration loader uses os.ExpandEnv, which silently replaces missing environment variables with empty strings. This leads to cryptic errors from providers (e.g., "API key is empty") rather than a clear diagnostic message about which environment variable is missing.

Proposed Solution

• Add a Validate() error method to the Config struct in internal/core/config/config.go.
• Call validation after loading the configuration.
• Check for required fields like Qdrant.URL, Qdrant.APIKey, and Embedding.APIKey.
• Provide clear error messages indicating which environment variable or config field is missing.

[gh-simili-bot]

Simili Triage Report

Note

Quality Score: 8.5/10 (Good)
The issue is well-described.

Classification

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Similar Threads

Similarity	Thread	Status
73%	#44 Similar Issue	Open
71%	#44 feat: add LLM configuration to YAML config (#37)	Open

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