v0.5.1

What's New

Developer Experience Improvements

• API Key Validation: Validates model/API key configuration before agent starts with helpful error messages
• Optional --data in CLI: Data parameter is now optional - not all tasks need data files
• data parameter in SDK: PlannerAgent now accepts data parameter for parity with CLI
• copy_data() in RunContext: Reusable method for copying data to workspace

System Prompt Improvements

• Workspace structure rules: Agent saves outputs to artifacts/, reads data from data/
• Critical data rules: Agent never generates synthetic data without explicit request
• Better error handling: Agent stops and asks user when data sources fail or libraries are missing

Fixes

• Fixed broken session management code (marked as experimental/TODO)
• Removed "Session Management" from features list until properly implemented

New Files

• src/dsagent/utils/validation.py - Model/API key validation utilities
• tests/test_validation.py - 18 tests for validation

Full Changelog

v0.5.0...v0.5.1