74c3b6b274
Phase 2 tasks 2.1 + 2.2 + 2.3a of the follow-up track. PROVIDERS now lives in src/ai_client.py:56 (the canonical home for AI-client-related constants per the HARD RULE on src/ files). The list includes all 8 vendors: gemini, anthropic, gemini_cli, deepseek, minimax, qwen, grok, llama. Backward compat: src/models.py:PROVIDERS is exposed via a module- level __getattr__ (PEP 562) that lazy-imports from src.ai_client. The lazy approach was needed because src.ai_client imports ToolPreset/BiasProfile/Tool from src.models at line 50, so a top-level 'from src.ai_client import PROVIDERS' in models.py would deadlock. Adding a branch to the existing __getattr__ in models.py (which also handles pydantic class factories) is the surgical fix. tests/test_provider_curation.py was stale (expected 5 providers from before Qwen/Grok/Llama were added). Updated to 8. New test: tests/test_providers_source_of_truth.py asserts: - src.ai_client.PROVIDERS exists and matches the 8-provider list - src.models.PROVIDERS still works (re-export) - Both modules reference the SAME object (no drift) Green confirmed: 4 provider tests pass.