Initial commit: Conflict Checker

Cross-discipline design-contradiction checker for construction drawing
sets. Standalone tool broken out from Iron_Bid; a pipeline stage may
later fold back into Iron_Bid.

Pipeline: PDF->images -> per-sheet assertion extraction -> deterministic
clustering by location -> per-cluster reasoning -> report.
Includes CLI (cli/run_check.py) and web UI (backend/main.py).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/pipeline/jurisdiction.py

@@ -0,0 +1,37 @@
+"""
+jurisdiction.py - Stage 0: project intake and jurisdiction / code profile (LLM).
+
+Turns whatever project metadata we have (intake form fields and/or values
+derived from the cover sheet) into a code profile that tells Stage 7 which
+review paths apply (IBC, ADA, TAS/TDLR, etc.). Returns {} on failure so the
+rest of the pipeline degrades gracefully.
+"""
+
+import json
+from typing import Dict, Optional
+
+from backend import config
+from backend.pipeline._stage import call_stage
+from backend.prompts import JURISDICTION_SYSTEM_PROMPT, JURISDICTION_USER_INSTRUCTION
+
+
+def run_jurisdiction(project_input: Optional[Dict]) -> Dict:
+    """Build the project code profile from available project metadata."""
+    project_input = project_input or {}
+    parsed = call_stage(
+        JURISDICTION_SYSTEM_PROMPT,
+        JURISDICTION_USER_INSTRUCTION,
+        subs={"project_input": json.dumps(project_input, ensure_ascii=True)},
+        max_tokens=config.JURISDICTION_MAX_TOKENS,
+    )
+    if not isinstance(parsed, dict):
+        print("[Jurisdiction] no profile produced; code review will be limited")
+        return {}
+    # The prompt wraps the result in "project_code_profile"; unwrap when present.
+    profile = parsed.get("project_code_profile")
+    return profile if isinstance(profile, dict) else parsed
+
+
+def active_review_paths(profile: Dict) -> Dict:
+    """The review_paths sub-dict (which code checks are on), or {} if absent."""
+    return (profile or {}).get("review_paths") or {}