feat: add us-cpa question engine

skills/us-cpa/src/us_cpa/cli.py

@@ -7,6 +7,7 @@ from pathlib import Path
 from typing import Any
 
 from us_cpa.cases import CaseConflictError, CaseManager
+from us_cpa.questions import QuestionEngine, render_analysis, render_memo
 from us_cpa.sources import TaxYearCorpus, bootstrap_irs_catalog
 
 COMMANDS = (
@@ -64,6 +65,7 @@ def build_parser() -> argparse.ArgumentParser:
     question = subparsers.add_parser("question", help="Answer a tax question.")
     _add_common_arguments(question)
     question.add_argument("--question", required=True)
+    question.add_argument("--style", choices=("conversation", "memo"), default="conversation")
 
     prepare = subparsers.add_parser("prepare", help="Prepare a return case.")
     _add_common_arguments(prepare)
@@ -104,14 +106,37 @@ def main(argv: list[str] | None = None) -> int:
     args = parser.parse_args(argv)
 
     if args.command == "question":
+        corpus = TaxYearCorpus()
+        engine = QuestionEngine(corpus=corpus)
+        case_facts: dict[str, Any] = {}
+        if args.case_dir:
+            manager = CaseManager(Path(args.case_dir))
+            if manager.facts_path.exists():
+                case_facts = {
+                    key: value["value"]
+                    for key, value in json.loads(manager.facts_path.read_text())["facts"].items()
+                }
+        analysis = engine.answer(
+            question=args.question,
+            tax_year=args.tax_year,
+            case_facts=case_facts,
+        )
         payload = {
             "command": "question",
             "format": args.format,
+            "style": args.style,
             "taxYear": args.tax_year,
             "caseDir": args.case_dir,
             "question": args.question,
-            "status": "not_implemented",
+            "status": "answered",
+            "analysis": analysis,
         }
+        payload["rendered"] = (
+            render_memo(analysis) if args.style == "memo" else render_analysis(analysis)
+        )
+        if args.format == "markdown":
+            print(payload["rendered"])
+            return 0
         return _emit(payload, args.format)
 
     if args.command == "extract-docs":