Step 13: Korban Processor complete — 7 modules, 181 tests, all passing

- semichah: provenance tagging (6 sources, rejects empty/anonymous)
- shechitah: strip preamble, self-reference, hedging, markdown, sycophancy
- zerikah: extract Torah refs, Hebrew text, root analysis, insight markers
- haktarah: transform prose to Prolog propositions (verse/3, root/2, claim/2, connection/3)
- router: stateless routing — removed module-level _routing_log (kiyyor principle)
- model_interface: outbound Claude API via httpx (Construction §3.4, HTTPS only)
- hebrew_parser: nikkud/teamim stripping, consonant extraction, gematria, root identification

All 5 BUILD_KORBAN.md verification tests pass.
AGENTS.md: added structure_not_content.md to spec table, added Principle 6.
build_log.md: recorded session, broken tablets #18-20, design decisions.

Ka'asher tzivah Hashem et Moshe.

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

korban_processor/test/test_semichah.py

@@ -0,0 +1,62 @@
+"""
+Tests for semichah — provenance tagging.
+
+Architecture §3.5: semichah associates input with its source.
+Every korban must have known provenance. Anonymous input is rejected.
+"""
+
+import pytest
+
+from korban_processor.korban import Korban, OfferingType, Provenance
+from korban_processor.semichah import semichah
+
+
+class TestSemichahTagsProvenance:
+    def test_tags_claude_provenance(self):
+        korban = semichah("some content", Provenance.CLAUDE, "test query")
+        assert korban.provenance == Provenance.CLAUDE
+
+    def test_tags_human_provenance(self):
+        korban = semichah("some content", Provenance.HUMAN, "test query")
+        assert korban.provenance == Provenance.HUMAN
+
+    def test_all_provenance_sources(self):
+        for prov in Provenance:
+            korban = semichah("content", prov, "query")
+            assert korban.provenance == prov
+
+    def test_preserves_raw_content(self):
+        raw = "The root ר-א-ש means beginning. Bereishit 1:1."
+        korban = semichah(raw, Provenance.CLAUDE, "query")
+        assert korban.raw_content == raw
+
+    def test_preserves_source_query(self):
+        query = "what does bereishit mean?"
+        korban = semichah("content", Provenance.CLAUDE, query)
+        assert korban.source_query == query
+
+    def test_default_offering_type_is_olah(self):
+        korban = semichah("content", Provenance.CLAUDE, "query")
+        assert korban.offering_type == OfferingType.OLAH
+
+    def test_explicit_offering_type(self):
+        korban = semichah("content", Provenance.CLAUDE, "query", OfferingType.SHELAMIM)
+        assert korban.offering_type == OfferingType.SHELAMIM
+
+    def test_returns_korban_instance(self):
+        result = semichah("content", Provenance.CLAUDE, "query")
+        assert isinstance(result, Korban)
+
+
+class TestSemichahRejectsInvalidInput:
+    def test_rejects_empty_content(self):
+        with pytest.raises(ValueError, match="Empty korban"):
+            semichah("", Provenance.CLAUDE, "query")
+
+    def test_rejects_whitespace_only_content(self):
+        with pytest.raises(ValueError, match="Empty korban"):
+            semichah("   \n\t  ", Provenance.CLAUDE, "query")
+
+    def test_rejects_non_provenance_source(self):
+        with pytest.raises((ValueError, AttributeError)):
+            semichah("content", "claude", "query")  # type: ignore[arg-type]