feat(platform): live-wire AGB v2 + DSE v3 + Architektur-Tab (#29)

AGB v2 (decision_method routing, 71%FP->~0) + DSE v3 (4-layer, recovered from container) + Architektur-Tab into /sdk/agent live path. Incl CI robustness (detect-changes.sh + PR-head checkout) + security (hardcoded Qdrant key removed, gitleaks allowlist).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend-compliance/compliance/tests/test_agb_agent.py

@@ -1,12 +1,27 @@
-"""AGBAgent — kuratierte §§-305-ff-BGB-Checkliste (ChecklistAgent-Subclass)."""
-
-from __future__ import annotations
-
+"""AGBAgent (v2, routed). Embedding/LLM offline-gestubbt → kein Netzwerk."""
 import asyncio
 
+import pytest
+
+import compliance.services.specialist_agents.agb._pipeline as pipeline
+from compliance.services.checkers.base import CheckResult
 from compliance.services.specialist_agents import REGISTRY, AgentInput
 
 
+class _Stub:
+    def __init__(self, present):
+        self._p = present
+
+    async def check(self, ctrl, doc):
+        return CheckResult(present=self._p)
+
+
+@pytest.fixture(autouse=True)
+def _offline(monkeypatch):
+    monkeypatch.setattr(pipeline, "_EMB", _Stub(None))
+    monkeypatch.setattr(pipeline, "_LLM", _Stub(None))
+
+
 def _run(text: str):
     return asyncio.run(
         REGISTRY.get("agb").evaluate(AgentInput(doc_type="agb", text=text)))

backend-compliance/compliance/tests/test_agb_routed_agent.py

@@ -0,0 +1,62 @@
+"""AGB routed-Pipeline: Gate, Reference-/Embedding-Rescue, LLM-skip, Re-Tiering.
+Embedding + LLM offline-gestubbt → deterministisch, kein Netzwerk (Reference = echtes Regex)."""
+import asyncio
+from types import SimpleNamespace
+
+import pytest
+
+import compliance.services.specialist_agents.agb._pipeline as pipeline
+from compliance.services.checkers.base import CheckResult
+from compliance.services.specialist_agents._base import AgentInput
+from compliance.services.specialist_agents.agb.agent import AGBAgent
+
+
+class _Stub:
+    def __init__(self, present):
+        self._p = present
+
+    async def check(self, ctrl, doc):
+        return CheckResult(present=self._p)
+
+
+@pytest.fixture(autouse=True)
+def _offline(monkeypatch):
+    monkeypatch.setattr(pipeline, "_EMB", _Stub(None))
+    monkeypatch.setattr(pipeline, "_LLM", _Stub(None))
+
+
+def _routed(field_ids, text, context=None):
+    findings = [SimpleNamespace(field_id=fid) for fid in field_ids]
+    return asyncio.run(pipeline.run_routed(findings, text, context or {}))
+
+
+def test_gate_termination_na_for_oneoff_shop():
+    text = "Widerrufsbelehrung: Sie koennen binnen 14 Tagen widerrufen. " * 5
+    kept, resolved, gated = _routed(["termination", "termination_form"], text)
+    assert set(gated) == {"termination", "termination_form"}
+    assert kept == []
+
+
+def test_reference_rescues_data_protection():
+    text = "Einzelheiten zur Verarbeitung in unserer Datenschutzerklaerung. " * 5
+    kept, resolved, gated = _routed(["data_protection"], text)
+    assert "data_protection" in resolved and kept == []
+
+
+def test_embedding_rescue_resolves(monkeypatch):
+    monkeypatch.setattr(pipeline, "_EMB", _Stub(True))
+    kept, resolved, gated = _routed(["scope"], "x" * 200)
+    assert "scope" in resolved
+
+
+def test_llm_skipped_keeps_finding():
+    kept, resolved, gated = _routed(["delivery_timeframe"], "x" * 200, {"skip_llm": True})
+    assert [f.field_id for f in kept] == ["delivery_timeframe"] and resolved == []
+
+
+def test_evaluate_retiers_low_out_of_findings():
+    text = ("Allgemeine Geschaeftsbedingungen. Vertragsschluss durch Bestellung. "
+            "Haftung beschraenkt. Gerichtsstand Muenchen. ") * 6
+    out = asyncio.run(AGBAgent().evaluate(AgentInput(doc_type="agb", text=text)))
+    assert out.agent == "agb" and out.agent_version == "2.0"
+    assert all(f.severity in ("HIGH", "MEDIUM") for f in out.findings)

backend-compliance/compliance/tests/test_agent_outputs_topics.py

@@ -0,0 +1,14 @@
+"""AGB muss im LIVE-Pfad verdrahtet sein (_TOPIC_AGENTS), nicht nur per Snapshot."""
+from compliance.api.agent_check._agent_outputs import _TOPIC_AGENTS
+
+
+def test_agb_wired_into_live_topic_agents():
+    assert _TOPIC_AGENTS.get("agb") == "agb"
+
+
+def test_dse_wired_into_live_topic_agents():
+    assert _TOPIC_AGENTS.get("dse") == "dse"
+
+
+def test_impressum_still_wired():
+    assert _TOPIC_AGENTS.get("impressum") == "impressum"

backend-compliance/compliance/tests/test_checkers.py

@@ -0,0 +1,83 @@
+"""Unit-Tests der Prüfer-Library. Embedding + LLM gemockt → kein Netzwerk."""
+import asyncio
+
+import compliance.services.llm_cascade as cascade_mod
+import compliance.services.mc_embedding_matcher as emb_mod
+from compliance.services.checkers.base import (
+    ControlSpec,
+    DecisionMethod,
+    DocContext,
+    VerificationMethod,
+)
+from compliance.services.checkers.embedding_checker import EmbeddingChecker
+from compliance.services.checkers.llm_checker import LLMChecker
+from compliance.services.checkers.reference_checker import ReferenceChecker
+
+
+def _run(coro):
+    return asyncio.run(coro)
+
+
+def test_reference_present_and_absent():
+    rc = ReferenceChecker()
+    spec = ControlSpec("data_protection", VerificationMethod.REFERENCE,
+                       DecisionMethod.LINK_RESOLVER,
+                       patterns=[r"datenschutz(erkl|bestimmung|hinweis)"])
+    r = _run(rc.check(spec, DocContext(
+        text="Details in unserer Datenschutzerklaerung: https://x.de/datenschutz")))
+    assert r.present is True
+    assert r.detail.get("link", "").startswith("https://")
+    r2 = _run(rc.check(spec, DocContext(text="Keine Angabe zum Datenschutz-Thema.")))
+    assert r2.present is False
+
+
+def test_embedding_threshold(monkeypatch):
+    monkeypatch.setattr(emb_mod, "DIM", 3, raising=False)
+    monkeypatch.setattr(emb_mod, "_chunk_text", lambda t: [t], raising=False)
+
+    async def _embed(texts):
+        return [[1.0, 0.0, 0.0] for _ in texts]
+
+    monkeypatch.setattr(emb_mod, "_embed_texts", _embed, raising=False)
+    ec = EmbeddingChecker()
+    spec = ControlSpec("scope_t", VerificationMethod.CONTENT, DecisionMethod.EMBEDDING,
+                       paraphrases=["Geltungsbereich"], embed_threshold=0.58)
+    monkeypatch.setattr(emb_mod, "_cosine", lambda a, b: 0.90, raising=False)
+    r = _run(ec.check(spec, DocContext(text="x" * 200)))
+    assert r.present is True and r.confidence >= 0.58
+    monkeypatch.setattr(emb_mod, "_cosine", lambda a, b: 0.20, raising=False)
+    r2 = _run(ec.check(spec, DocContext(text="x" * 200)))
+    assert r2.present is False
+
+
+def test_embedding_offline_returns_none(monkeypatch):
+    async def _boom(texts):
+        raise ConnectionError("embedding-service down")
+
+    monkeypatch.setattr(emb_mod, "_embed_texts", _boom, raising=False)
+    ec = EmbeddingChecker()
+    spec = ControlSpec("scope_off", VerificationMethod.CONTENT, DecisionMethod.EMBEDDING,
+                       paraphrases=["x"], embed_threshold=0.6)
+    r = _run(ec.check(spec, DocContext(text="y" * 200)))
+    assert r.present is None  # fail-safe
+
+
+def test_llm_present_and_absent(monkeypatch):
+    lc = LLMChecker()
+    spec = ControlSpec("delivery_timeframe", VerificationMethod.CONTENT, DecisionMethod.LLM,
+                       topic_regex=r"liefer", question="Konkrete Lieferfrist?")
+    doc = DocContext(text=("1. Lieferung\nDie Ware wird innerhalb von 2 Werktagen "
+                           "geliefert.\n") * 4)
+
+    async def _erfuellt(system, user, **kw):
+        return {"text": '{"verdict":"ERFUELLT","zitat":"2 Werktagen","begruendung":"x"}',
+                "source": "qwen", "confidence": 0.7}
+
+    monkeypatch.setattr(cascade_mod, "call_with_cascade", _erfuellt, raising=False)
+    assert _run(lc.check(spec, doc)).present is True
+
+    async def _fehlt(system, user, **kw):
+        return {"text": '{"verdict":"FEHLT"}', "source": "qwen"}
+
+    monkeypatch.setattr(cascade_mod, "call_with_cascade", _fehlt, raising=False)
+    assert _run(lc.check(spec, doc)).present is False

backend-compliance/compliance/tests/test_dse_agent.py

@@ -1,65 +1,153 @@
-"""DSEAgent — kuratierte Art-13/14-Checkliste (kein Library-Firehose)."""
+"""DSE-Agent v3 — DB-Controls (doc_check_controls) via run_v3_pipeline +
+kuratierter Art-13-Regex-Boost (Layer 0). Volle Parität zu impressum/cookie.
+
+Die Tests prüfen die deterministischen Bausteine (regex_boost/mcs) ohne DB und
+den Agent-Pfad mit gemocktem run_v3_pipeline (CI hat keine DB).
+"""
 
 from __future__ import annotations
 
 import asyncio
 
+import compliance.services.specialist_agents.dse.agent as dse_agent
 from compliance.services.specialist_agents import REGISTRY, AgentInput
+from compliance.services.specialist_agents.dse.mcs import MCS, MC_IDS
+from compliance.services.specialist_agents.dse.regex_boost import (
+    boost_matches_db_mc,
+    compute_regex_boosts,
+    criteria_on_topic,
+)
+
+_DSE_SAMPLE = (
+    "Datenschutzerklaerung. Verantwortlich im Sinne der DSGVO ist die Muster "
+    "GmbH, Musterstrasse 1, 12345 Berlin. E-Mail: info@muster.de. "
+    "Datenschutzbeauftragter: dsb@muster.de. Zwecke der Verarbeitung und "
+    "Rechtsgrundlage Art. 6 Abs. 1 lit. f berechtigtes Interesse. Empfaenger "
+    "Ihrer Daten sind Auftragsverarbeiter. Speicherdauer der Daten richtet "
+    "sich nach Aufbewahrungsfristen. Sie haben das Recht auf Auskunft, das "
+    "Recht auf Berichtigung, das Recht auf Loeschung sowie ein "
+    "Widerspruchsrecht. Beschwerde bei der Aufsichtsbehoerde moeglich. Stand: "
+    "Januar 2026. ") * 3
 
 
-def _run(text: str):
-    return asyncio.run(
-        REGISTRY.get("dse").evaluate(AgentInput(doc_type="dse", text=text)))
-
-
+# ── Registrierung ────────────────────────────────────────────────────────
 def test_dse_agent_registered():
-    assert REGISTRY.get("dse") is not None
+    agent = REGISTRY.get("dse")
+    assert agent is not None
+    assert agent.agent_version == "3.0"
+    assert agent.doc_type == "dse"
 
 
-def test_dse_detects_core_obligations():
-    text = (
-        "Datenschutzerklaerung. Verantwortlich im Sinne der DSGVO ist die "
-        "Muster GmbH, Musterstrasse 1, 12345 Berlin. E-Mail: info@muster.de. "
-        "Datenschutzbeauftragter: dsb@muster.de. Zwecke der Verarbeitung und "
-        "Rechtsgrundlage Art. 6 Abs. 1. Empfaenger Ihrer Daten. Speicherdauer "
-        "der Daten. Ihre Rechte: Auskunft, Loeschung, Widerspruch, Beschwerde "
-        "bei der Aufsichtsbehoerde. ") * 3
-    out = _run(text)
-    assert out.agent == "dse"
-    # 10 L1-Pflichtangaben immer + L2-Details deren Parent vorhanden ist
-    # (fehlende Parents → L2 übersprungen, kein 'na'-Rauschen).
-    assert 10 <= out.mc_total <= 33
-    ok = [c.label for c in out.mc_coverage if c.status == "ok"]
-    assert any("Verantwortlich" in lbl for lbl in ok)
-    assert any("Rechtsgrundlage" in lbl for lbl in ok)
+def test_owned_mc_ids_match_checklist():
+    # owned_mc_ids = die Boost-Pattern-IDs (aus ART13_CHECKLIST gehoben).
+    assert MC_IDS == tuple(m.mc_id for m in MCS)
+    assert len(MC_IDS) >= 10  # mind. die 10 L1-Pflichtfelder + L2
 
 
-def test_dse_missing_obligations_are_findings():
-    out = _run("Lorem ipsum dolor sit amet consectetur adipiscing elit. " * 6)
-    assert out.findings
-    assert any(f.severity == "HIGH" for f in out.findings)
+# ── Layer-0 Regex-Boost (deterministisch, ohne DB) ───────────────────────
+def test_regex_boost_detects_core_fields():
+    boosts = compute_regex_boosts(_DSE_SAMPLE)
+    # Die zentralen Art-13-Felder müssen erkannt werden.
+    for field in ("controller", "legal_basis", "rights", "complaint",
+                  "retention", "dse_version_date"):
+        assert field in boosts, f"{field} nicht erkannt: {sorted(boosts)}"
+
+
+def test_regex_boost_empty_on_short_text():
+    assert compute_regex_boosts("zu kurz") == set()
+
+
+def test_criteria_on_topic_accepts_dse_rejects_foreign():
+    dse_crit = ["Rechtsgrundlage gemäß Art. 6 DSGVO benannt",
+                "Speicherdauer und Löschfrist angegeben"]
+    assert criteria_on_topic(dse_crit) is True
+    foreign = ["Bestellbestätigung wird per E-Mail versendet",
+               "Versandkosten werden im Warenkorb angezeigt"]
+    assert criteria_on_topic(foreign) is False
+    # leere Kriterien → konservativ on-topic behalten
+    assert criteria_on_topic([]) is True
+
+
+def test_boost_matches_db_mc_third_country():
+    boosts = {"third_country", "controller"}
+    crit = ["Standardvertragsklauseln für Drittland benannt",
+            "Geeignete Garantien bei Übermittlung in ein Drittland"]
+    assert boost_matches_db_mc(boosts, crit) == "third_country"
+    # ohne passende Boosts → None
+    assert boost_matches_db_mc(set(), crit) is None
+
+
+# ── Agent-Pfad mit gemocktem run_v3_pipeline ─────────────────────────────
+def _mock_v3(results, telemetry=None):
+    async def _fake(text, scope, db_url="", skip_embedding=False):
+        return results, (telemetry or {
+            "total_mcs": len(results), "layer_0_field_hits": 0,
+            "layer_0_field_ids": [], "layer_0_boost_overrides": 0,
+            "sector_dropped": 0, "offtopic_dropped": 0})
+    return _fake
+
+
+def _run(text, context=None):
+    return asyncio.run(REGISTRY.get("dse").evaluate(
+        AgentInput(doc_type="dse", text=text, context=context or {})))
 
 
 def test_dse_short_text_skips():
     out = _run("zu kurz")
     assert out.confidence == 0.0
-    assert all(c.status == "skipped" for c in out.mc_coverage)
+    assert out.mc_coverage and all(
+        c.status == "skipped" for c in out.mc_coverage)
 
 
-def test_third_country_high_when_applicable_no_na_detail_short_action():
-    # Text ohne Drittland-Abschnitt + Scan-Kontext drittland=ja:
-    #  - third_country (L1) fehlt → HIGH (nicht weiches MEDIUM)
-    #  - Transfermechanismus (L2) → KEIN 'na' (übersprungen, Parent deckt ab)
-    #  - Titel/Maßnahme kurz (kein 280-Zeichen-Hint als Recommendation-Titel)
-    text = ("Datenschutz. Verantwortlich ist die Muster GmbH, info@muster.de. "
-            "Zwecke und Rechtsgrundlage Art. 6. Speicherdauer. Ihre Rechte. ") * 4
-    out = asyncio.run(REGISTRY.get("dse").evaluate(AgentInput(
-        doc_type="dse", text=text,
-        context={"scan_context": {"third_country_transfer": "yes"}})))
-    tc = [f for f in out.findings if "Drittland" in f.title]
-    assert tc and tc[0].severity == "HIGH"
-    assert not any(c.status == "na" and "Transfermechanismus" in c.label
-                   for c in out.mc_coverage)
-    assert all(len(f.action) < 110 for f in out.findings)
-    # Detail-Begründung bleibt als evidence erhalten
-    assert any(f.evidence for f in out.findings)
+def test_dse_findings_from_failed_db_mc(monkeypatch):
+    results = [{
+        "control_id": "DATA-525-A17", "passed": False, "severity": "HIGH",
+        "label": "Berechtigte Interessen ausweisen", "regulation": None,
+        "article": None, "_pass_criteria": ["berechtigtes interesse benannt"],
+        "matched_text": "", "source": "keyword_match",
+    }, {
+        "control_id": "AUTH-2051-A11", "passed": True, "severity": "LOW",
+        "label": "Prägnante Form", "regulation": None, "article": None,
+        "_pass_criteria": [], "matched_text": "ok",
+    }]
+    monkeypatch.setattr(dse_agent, "run_v3_pipeline", _mock_v3(results))
+    out = _run(_DSE_SAMPLE, context={"skip_llm": True})
+    fids = {f.field_id for f in out.findings}
+    assert "DATA-525-A17" in fids       # failed → Finding
+    assert "AUTH-2051-A11" not in fids  # passed → kein Finding
+    f = next(f for f in out.findings if f.field_id == "DATA-525-A17")
+    assert f.severity == "HIGH"
+    assert f.norm == "DSGVO Art. 13/14"  # NULL-regulation → Fallback-Norm
+    assert len(f.action) < 410
+
+
+def test_dse_third_country_override_to_high(monkeypatch):
+    # MEDIUM-Drittland-MC → HIGH bei dokumentiertem Transfer (scan_context).
+    results = [{
+        "control_id": "DATA-900-A01", "passed": False, "severity": "MEDIUM",
+        "label": "Drittlandtransfer Schutzgarantien benennen",
+        "regulation": None, "article": None,
+        "_pass_criteria": ["standardvertragsklauseln", "drittland garantien"],
+        "matched_text": "", "source": "keyword_match",
+    }]
+    monkeypatch.setattr(dse_agent, "run_v3_pipeline", _mock_v3(results))
+    out = _run(_DSE_SAMPLE, context={
+        "skip_llm": True,
+        "scan_context": {"third_country_transfer": "yes"}})
+    f = next(f for f in out.findings if f.field_id == "DATA-900-A01")
+    assert f.severity == "HIGH"
+    assert f.severity_reason == "db_mc_failed_third_country_transfer"
+
+
+def test_dse_no_transfer_keeps_medium(monkeypatch):
+    results = [{
+        "control_id": "DATA-900-A01", "passed": False, "severity": "MEDIUM",
+        "label": "Drittlandtransfer Schutzgarantien benennen",
+        "regulation": None, "article": None,
+        "_pass_criteria": ["standardvertragsklauseln", "drittland garantien"],
+        "matched_text": "", "source": "keyword_match",
+    }]
+    monkeypatch.setattr(dse_agent, "run_v3_pipeline", _mock_v3(results))
+    out = _run(_DSE_SAMPLE, context={"skip_llm": True})
+    f = next(f for f in out.findings if f.field_id == "DATA-900-A01")
+    assert f.severity == "MEDIUM"

backend-compliance/compliance/tests/test_dse_classification_gate.py

@@ -0,0 +1,59 @@
+"""Tests fuer das DSE-Applicability-Gate (_classification_gate).
+
+Deckt die reine Split-Logik (apply_gate) und das defensive Verhalten von
+load_dse_gate ohne DB ab. Die DB-Abfrage selbst ist I/O und wird hier nicht
+gegen eine echte DB getestet (defensiver Pfad: kein DSN -> leeres Dict)."""
+
+import asyncio
+import os
+
+from compliance.services.specialist_agents.dse._classification_gate import (
+    apply_gate,
+    load_dse_gate,
+)
+
+
+def test_apply_gate_splits_findings_and_organizational():
+    controls = [
+        {"control_id": "AUTH-2051-A02", "title": "Speicherdauer nennen"},
+        {"control_id": "AUTH-2049-A01", "title": "VVT fuehren"},
+    ]
+    gate = {
+        "AUTH-2049-A01": {
+            "obligation_type": "EVIDENCE",
+            "check_intent": "DIRECT_EVIDENCE",
+            "applicable_artifacts": ["VVT", "AUDIT"],
+            "reference_allowed": "NO",
+        }
+    }
+    kept, organizational = apply_gate(controls, gate)
+    assert [c["control_id"] for c in kept] == ["AUTH-2051-A02"]
+    assert len(organizational) == 1
+    org = organizational[0]
+    assert org["control_id"] == "AUTH-2049-A01"
+    assert org["title"] == "VVT fuehren"
+    assert org["applicable_artifacts"] == ["VVT", "AUDIT"]
+    assert org["check_intent"] == "DIRECT_EVIDENCE"
+
+
+def test_apply_gate_empty_gate_keeps_all():
+    controls = [{"control_id": "X-1"}, {"control_id": "X-2"}]
+    kept, organizational = apply_gate(controls, {})
+    assert len(kept) == 2
+    assert organizational == []
+
+
+def test_load_dse_gate_without_dsn_is_defensive():
+    """Kein DSN + keine Env -> leeres Dict (kein Filter), kein Fehler."""
+    saved = (
+        os.environ.pop("DATABASE_URL", None),
+        os.environ.pop("COMPLIANCE_DATABASE_URL", None),
+    )
+    try:
+        result = asyncio.run(load_dse_gate(""))
+        assert result == {}
+    finally:
+        if saved[0] is not None:
+            os.environ["DATABASE_URL"] = saved[0]
+        if saved[1] is not None:
+            os.environ["COMPLIANCE_DATABASE_URL"] = saved[1]

backend-compliance/compliance/tests/test_dse_embedding_recall.py

@@ -0,0 +1,67 @@
+"""DSE Embedding-Recall — deterministische semantische Schicht (gecacht).
+
+Testet die reine Logik OHNE Embedding-Service: Cache-Treffer-Pfad,
+Schwellen-Filter, Kandidaten-Schnitt, Reachability-Guard. Das Einbetten selbst
+(Embedding-Service) ist Integration und wird auf macmini/Prod validiert.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+
+import compliance.services.specialist_agents.dse._embedding_recall as er
+
+
+_TEXT = ("Datenschutzerklaerung der Muster GmbH. " * 20)  # > 100 Zeichen
+
+
+def _seed_cache(tmp_path, scores: dict[str, float]) -> str:
+    p = tmp_path / "dse_embed_cache.json"
+    p.write_text(json.dumps({er._doc_hash(_TEXT): scores}))
+    return str(p)
+
+
+def test_doc_hash_deterministic():
+    # feste Funktion: gleicher Text → gleicher Hash (Reproduzierbarkeit)
+    assert er._doc_hash(_TEXT) == er._doc_hash(_TEXT)
+    assert er._doc_hash("a") != er._doc_hash("b")
+
+
+def test_cache_hit_threshold_filter(tmp_path, monkeypatch):
+    # Cache-Treffer: kein Embedding-Service nötig. Nur Scores >= Schwelle UND
+    # in den Kandidaten werden zurückgegeben.
+    scores = {"DATA-1": 0.71, "DATA-2": 0.60, "AUTH-3": 0.68, "SEC-4": 0.50}
+    monkeypatch.setenv("DSE_EMBED_CACHE", _seed_cache(tmp_path, scores))
+    monkeypatch.setattr(er, "_CACHE_PATH", str(tmp_path / "dse_embed_cache.json"))
+
+    cands = ["DATA-1", "DATA-2", "AUTH-3", "SEC-4"]
+    out = asyncio.run(er.embedding_recall(_TEXT, cands, threshold=0.65))
+    # >=0.65: DATA-1 (0.71), AUTH-3 (0.68). NICHT DATA-2 (0.60), SEC-4 (0.50).
+    assert out == {"DATA-1", "AUTH-3"}
+
+
+def test_cache_hit_candidate_intersection(tmp_path, monkeypatch):
+    # Nur Kandidaten (durchgefallene Controls) zählen — andere ignoriert.
+    scores = {"DATA-1": 0.90, "DATA-2": 0.90}
+    monkeypatch.setattr(er, "_CACHE_PATH", str(tmp_path / "c.json"))
+    (tmp_path / "c.json").write_text(json.dumps({er._doc_hash(_TEXT): scores}))
+    out = asyncio.run(er.embedding_recall(_TEXT, ["DATA-1"], threshold=0.65))
+    assert out == {"DATA-1"}  # DATA-2 nicht in Kandidaten
+
+
+def test_empty_inputs():
+    assert asyncio.run(er.embedding_recall("zu kurz", ["X"])) == set()
+    assert asyncio.run(er.embedding_recall(_TEXT, [])) == set()
+
+
+def test_service_down_returns_empty(tmp_path, monkeypatch):
+    # Kein Cache + Service nicht erreichbar → leer (deterministischer Layer trägt),
+    # KEIN Hang.
+    monkeypatch.setattr(er, "_CACHE_PATH", str(tmp_path / "none.json"))
+
+    async def _unreachable(timeout=2.0):
+        return False
+    monkeypatch.setattr(er, "_embedding_reachable", _unreachable)
+    out = asyncio.run(er.embedding_recall(_TEXT, ["DATA-1"]))
+    assert out == set()