Cal Corum c3218f70c4 refactor: hexagonal architecture with ports & adapters, DI, and test-first development ...

Domain layer (zero framework imports):
- domain/models.py: pure dataclasses (RuleDocument, RuleSearchResult,
  Conversation, ChatMessage, LLMResponse, ChatResult)
- domain/ports.py: ABC interfaces (RuleRepository, LLMPort,
  ConversationStore, IssueTracker)
- domain/services.py: ChatService orchestrates Q&A flow using only ports

Outbound adapters (implement domain ports):
- adapters/outbound/openrouter.py: OpenRouterLLM with persistent httpx
  client, robust JSON parsing, regex citation fallback
- adapters/outbound/sqlite_convos.py: SQLiteConversationStore with
  async_sessionmaker, timezone-aware datetimes, cleanup support
- adapters/outbound/gitea_issues.py: GiteaIssueTracker with markdown
  injection protection (fenced code blocks)
- adapters/outbound/chroma_rules.py: ChromaRuleRepository with clamped
  similarity scores

Inbound adapter:
- adapters/inbound/api.py: thin FastAPI router with input validation
  (max_length constraints), proper HTTP status codes (503 for missing LLM)

Configuration & wiring:
- config/settings.py: Pydantic v2 SettingsConfigDict (no module-level singleton)
- config/container.py: create_app() factory with lifespan-managed DI
- main.py: minimal entry point

Test infrastructure (90 tests, all passing):
- tests/fakes/: in-memory implementations of all 4 ports
- tests/domain/: 26 tests for models and ChatService
- tests/adapters/: 64 tests for all adapters using fakes/mocks
- No real API calls, no model downloads, no disk I/O in fast tests

Also fixes: aiosqlite version constraint (>=0.19.0), adds hatch build
targets for new package layout.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-08 15:51:16 -05:00

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