diff --git a/decnet/clustering/campaign/impl/similarity.py b/decnet/clustering/campaign/impl/similarity.py
index b289677e..2aa5bba8 100644
--- a/decnet/clustering/campaign/impl/similarity.py
+++ b/decnet/clustering/campaign/impl/similarity.py
@@ -185,21 +185,27 @@ def _directed_handoff(
 
 
 def shared_infra_weight(a: IdentityFeatures, b: IdentityFeatures) -> float:
-    """Jaccard over payload-hashes ∪ C2-endpoints ∪ decky-set.
+    """Jaccard over payload-hashes ∪ C2-endpoints.
+
+    Excludes ``decky_set`` deliberately: decky overlap is a *fleet
+    scarcity* artifact (a small fleet means many distinct campaigns
+    hit the same deckies) and would fuse F1's two unrelated campaigns
+    on shared targeting. Payload hashes and C2 endpoints are
+    operational artifacts; distinct campaigns rarely share them.
 
     At identity level this gets vetoed by the fingerprint-disagreement
     rule (``ed32358``); at campaign level it's the *primary* positive
-    signal — distinct identities sharing infra is the canonical co-op
-    pattern. We treat all three sets as one combined alphabet so a
-    single shared payload + C2 + decky add together rather than
-    averaging away a strong signal in one set with weak overlap in
-    another.
+    signal — distinct identities sharing payload + C2 is the canonical
+    co-op pattern (F5 multi_operator).
 
-    Returns Jaccard across the union of the three set families,
+    The decky-overlap signal lives in :func:`cohort_weight` instead
+    where its weak-tier multiplier prevents F1-style false merges.
+
+    Returns Jaccard across the union of the two set families,
     ``0.0`` when both sides are empty.
     """
-    a_set = a.payload_hashes | a.c2_endpoints | a.decky_set
-    b_set = b.payload_hashes | b.c2_endpoints | b.decky_set
+    a_set = a.payload_hashes | a.c2_endpoints
+    b_set = b.payload_hashes | b.c2_endpoints
     if not a_set and not b_set:
         return 0.0
     union = a_set | b_set
@@ -246,12 +252,16 @@ def temporal_overlap_weight(
 
 
 def cohort_weight(a: IdentityFeatures, b: IdentityFeatures) -> float:
-    """ASN-cohort + tooling-cohort weak signal.
+    """ASN-cohort + tooling-cohort + decky-overlap weak signal.
 
-    Jaccard over the union of ASN cohort and tooling cohort. F2's
-    failure mode (one identity rotating across many ASNs) doesn't
-    apply at *campaign* level — but multiple identities cooperating
-    out of the same hosting cohort is plausible co-op evidence.
+    Jaccard over the union of ASN cohort, tooling cohort, and decky
+    set. F2's failure mode (one identity rotating across many ASNs)
+    doesn't apply at *campaign* level — but multiple identities
+    cooperating out of the same hosting cohort is plausible co-op
+    evidence. Decky overlap lives here (not in :func:`shared_infra`)
+    because decky scarcity in a small honeypot fleet would otherwise
+    fuse unrelated campaigns hitting the same SSH targets (F1
+    shared_wordlist).
 
     Weak by design: the combined-weight tier multiplier keeps this
     from crossing threshold alone.
@@ -259,10 +269,12 @@ def cohort_weight(a: IdentityFeatures, b: IdentityFeatures) -> float:
     a_set: frozenset = frozenset(
         {("asn", str(x)) for x in a.asn_cohort}
         | {("tool", x) for x in a.tooling_cohort}
+        | {("decky", x) for x in a.decky_set}
     )
     b_set: frozenset = frozenset(
         {("asn", str(x)) for x in b.asn_cohort}
         | {("tool", x) for x in b.tooling_cohort}
+        | {("decky", x) for x in b.decky_set}
     )
     if not a_set and not b_set:
         return 0.0
@@ -277,20 +289,24 @@ def cohort_weight(a: IdentityFeatures, b: IdentityFeatures) -> float:
 
 #: Tier multipliers for the campaign graph. Tuned so:
 #:
-#: * Phase-handoff alone (1.0 → 1.0) crosses threshold — a clean
+#: * Phase-handoff alone (max 1.0) crosses threshold — a clean
 #:   F5-style handoff is sufficient evidence on its own.
-#: * Shared-infra alone (max 1.0) yields 0.7 — strong but not enough
-#:   without supporting evidence (F1 burns the same wordlist /
-#:   different campaigns shouldn't fuse on infra alone).
+#: * Shared-infra alone (max 1.0) crosses threshold — payload+C2
+#:   overlap is the canonical co-op signal (F5 multi_operator's
+#:   intended pass condition; decky overlap was deliberately moved
+#:   to :func:`cohort_weight` to avoid F1's false merge on shared
+#:   targeting).
 #: * Temporal overlap alone (max 1.0) yields 0.4 — supporting weight.
-#: * Cohort alone (max 1.0) yields 0.1 — defeats F2-style failures.
+#: * Cohort alone (max 1.0) yields 0.1 — defeats F1's shared-decky
+#:   failure mode and F2's rotating-ASN one.
 #:
-#: Shared-infra + temporal overlap together (1.1) cross threshold —
-#: the canonical co-op pattern. Shared-infra + cohort (0.8) does
-#: NOT — F1's wordlist-overlap-only failure mode is preserved.
+#: F1 shared_wordlist: payload+C2 = ∅ on both sides → shared_infra =
+#: 0; ASN+decky overlap fires cohort but at 0.1 stays well below
+#: threshold. F2 vpn_hopping is folded by the identity layer first,
+#: so the campaign clusterer sees one identity → one campaign.
 CAMPAIGN_TIER_WEIGHTS: dict[str, float] = {
     "phase_handoff": 1.0,
-    "shared_infra": 0.7,
+    "shared_infra": 1.0,
     "temporal_overlap": 0.4,
     "cohort": 0.1,
 }
@@ -363,8 +379,17 @@ def from_synthetic_identity(att, identity_uuid: Optional[str] = None) -> Identit
         decky = getattr(s, "decky", None) or getattr(s, "decky_id", None)
         if decky:
             decky_set.add(decky)
-        ts_start = getattr(s, "start_ts", None)
-        ts_end = getattr(s, "end_ts", None)
+        # SyntheticSession exposes ``started_at`` (datetime) +
+        # ``duration_s``; the production-row adapter (commit 3) gets
+        # ``start_ts``/``end_ts`` directly. Support both.
+        started_at = getattr(s, "started_at", None)
+        duration_s = getattr(s, "duration_s", None)
+        if started_at is not None:
+            ts_start = started_at.timestamp()
+            ts_end = ts_start + (float(duration_s) if duration_s else 0.0)
+        else:
+            ts_start = getattr(s, "start_ts", None)
+            ts_end = getattr(s, "end_ts", None)
         if ts_start is not None and ts_end is not None:
             session_windows.append((float(ts_start), float(ts_end)))
         phase_value = s.phase.value if hasattr(s, "phase") else None
@@ -379,6 +404,8 @@ def from_synthetic_identity(att, identity_uuid: Optional[str] = None) -> Identit
             last_phase_per_decky[decky] = phase_value
             if ts_end is not None:
                 last_seen_per_decky[decky] = float(ts_end)
+            elif ts_start is not None:
+                last_seen_per_decky[decky] = float(ts_start)
 
     return IdentityFeatures(
         identity_uuid=identity_uuid or att.attacker_id,
diff --git a/decnet/web/db/models/__init__.py b/decnet/web/db/models/__init__.py
index 596ce8d9..73e43fdf 100644
--- a/decnet/web/db/models/__init__.py
+++ b/decnet/web/db/models/__init__.py
@@ -170,6 +170,9 @@ __all__ = [
     "AttackersResponse",
     "SessionProfile",
     "SmtpTarget",
+    # campaigns
+    "Campaign",
+    "CampaignsResponse",
     # deploy
     "DeployIniRequest",
     "DeployResponse",
diff --git a/tests/clustering/test_campaign_similarity.py b/tests/clustering/test_campaign_similarity.py
index 45c6c4e7..07874844 100644
--- a/tests/clustering/test_campaign_similarity.py
+++ b/tests/clustering/test_campaign_similarity.py
@@ -275,36 +275,36 @@ def test_cohort_alone_below_threshold():
     assert combined_campaign_weight(a, b) < CAMPAIGN_EDGE_THRESHOLD
 
 
-def test_shared_infra_plus_temporal_overlap_crosses_threshold():
-    """The canonical co-op pattern: shared infra during the same window."""
+def test_shared_infra_alone_crosses_threshold():
+    """Shared payload + C2 alone is enough — F5's intended pass condition."""
     a = _features(
         "a",
         payload_hashes=frozenset({"h"}),
         c2_endpoints=frozenset({"c"}),
-        decky_set=frozenset({"d1"}),
-        session_windows=((0.0, 100.0),),
     )
     b = _features(
         "b",
         payload_hashes=frozenset({"h"}),
         c2_endpoints=frozenset({"c"}),
-        decky_set=frozenset({"d1"}),
-        session_windows=((0.0, 100.0),),
     )
     assert combined_campaign_weight(a, b) >= CAMPAIGN_EDGE_THRESHOLD
 
 
-def test_shared_infra_plus_cohort_below_threshold():
-    """F1 shared_wordlist: shared signals minus operational overlap is NOT co-op."""
+def test_decky_overlap_alone_below_threshold():
+    """F1's failure mode: shared targeting on a small fleet is NOT co-op.
+
+    Two campaigns hitting the same SSH deckies share no payload/C2,
+    just the decky set. Cohort tier alone must not cross threshold.
+    """
     a = _features(
         "a",
-        payload_hashes=frozenset({"h"}),
+        decky_set=frozenset({"d1", "d2"}),
         asn_cohort=frozenset({64512}),
     )
     b = _features(
         "b",
-        payload_hashes=frozenset({"h"}),
-        asn_cohort=frozenset({64512}),
+        decky_set=frozenset({"d1", "d2"}),
+        asn_cohort=frozenset({64513}),
     )
     assert combined_campaign_weight(a, b) < CAMPAIGN_EDGE_THRESHOLD
 
diff --git a/tests/clustering/test_campaign_worker.py b/tests/clustering/test_campaign_worker.py
index cde333ff..c2add69f 100644
--- a/tests/clustering/test_campaign_worker.py
+++ b/tests/clustering/test_campaign_worker.py
@@ -247,17 +247,14 @@ async def test_tick_empty_db_returns_empty_result(repo):
 
 @pytest.mark.anyio
 async def test_tick_forms_campaign_for_shared_infra_co_op(repo):
-    # Two identities, full shared-infra (payload + c2). Below threshold
-    # at identity level (and identity-side veto would block them) but at
-    # campaign level shared-infra alone is 0.7; need temporal overlap to
-    # cross. Add overlap via session windows... but the production-row
-    # adapter doesn't yet populate session_windows. So instead use a
-    # full payload+c2 overlap which gives Jaccard=1.0 → 0.7. Below
-    # threshold. The realistic production scenario for crossing is
-    # phase-handoff which the production-row adapter also doesn't yet
-    # populate. So with the v1 production-row adapter the campaign
-    # clusterer's effective behavior is "every identity is its own
-    # campaign" — exactly the F3 lone_wolf pass. Verify that here.
+    """Two identities with shared payload + C2 fold to one campaign.
+
+    The canonical F5-style co-op pattern, exercised end-to-end through
+    the production-row adapter. ``from_identity_row`` reads
+    ``payload_simhashes`` + ``c2_endpoints`` from the AttackerIdentity
+    JSON columns, builds IdentityFeatures, and the campaign weight
+    crosses threshold on shared_infra alone.
+    """
     await _create_identity(
         repo, "i1",
         payload_simhashes=json.dumps(["h1"]),
@@ -272,15 +269,31 @@ async def test_tick_forms_campaign_for_shared_infra_co_op(repo):
     c = ConnectedComponentsCampaignClusterer()
     result = await c.tick(repo)
 
-    # No phase-handoff or temporal overlap available from the
-    # production-row adapter — both stay singletons.
-    assert len(result.campaigns_formed) == 2
-    formed_idents = {
-        i for entry in result.campaigns_formed for i in entry["identity_uuids"]
-    }
+    assert len(result.campaigns_formed) == 1
+    formed_idents = set(result.campaigns_formed[0]["identity_uuids"])
     assert formed_idents == {"i1", "i2"}
 
 
+@pytest.mark.anyio
+async def test_tick_keeps_distinct_payloads_separate(repo):
+    """No payload/C2 overlap → singleton per identity."""
+    await _create_identity(
+        repo, "i1",
+        payload_simhashes=json.dumps(["h1"]),
+        c2_endpoints=json.dumps(["c1"]),
+    )
+    await _create_identity(
+        repo, "i2",
+        payload_simhashes=json.dumps(["h2"]),
+        c2_endpoints=json.dumps(["c2"]),
+    )
+
+    c = ConnectedComponentsCampaignClusterer()
+    result = await c.tick(repo)
+
+    assert len(result.campaigns_formed) == 2
+
+
 @pytest.mark.anyio
 async def test_tick_idempotent_links_existing_identity(repo):
     """Second tick on same input doesn't double-create campaigns."""
diff --git a/tests/clustering/test_fixtures_campaign_clusterer.py b/tests/clustering/test_fixtures_campaign_clusterer.py
new file mode 100644
index 00000000..802a60e6
--- /dev/null
+++ b/tests/clustering/test_fixtures_campaign_clusterer.py
@@ -0,0 +1,278 @@
+"""Run the production campaign clusterer through all 7 fixtures.
+
+The 7 fixtures' YAML bounds were tuned for *reference* clusterers
+(``c2_callback_clusterer``, ``composite_signals_clusterer``, etc.).
+The production campaign clusterer (``ConnectedComponentsCampaignClusterer``)
+is the system under test now; this module asserts it meets every
+existing bound, plus a few stricter per-fixture invariants where the
+algorithm should — by design — score perfectly.
+
+The pure path is what's exercised here: ``cluster_identities``
+operating over ``IdentityFeatures`` projected via
+``from_synthetic_identity``. Each ``SyntheticAttacker`` is treated as
+one identity (identity layer is below; the campaign clusterer reads
+identities). End-to-end DB-backed validation is in
+``test_campaign_worker.py``.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any
+
+import pytest
+import yaml
+
+from decnet.clustering.campaign.impl.connected_components import (
+    cluster_identities,
+)
+from decnet.clustering.campaign.impl.similarity import (
+    IdentityFeatures,
+    from_synthetic_identity,
+)
+from decnet.clustering.impl.connected_components import cluster_observations
+from decnet.clustering.impl.similarity import from_synthetic
+from tests.clustering.fixture_harness import assert_fixture_bounds
+from tests.clustering.metrics import score
+from tests.factories.campaign_factory import generate, load_yaml
+
+FIXTURE_DIR = Path(__file__).parent.parent / "fixtures" / "campaigns"
+
+
+def _load_corpus(yaml_name: str) -> Any:
+    """Load a fixture; expand the noise_floor composite if required."""
+    path = FIXTURE_DIR / yaml_name
+    raw = yaml.safe_load(path.read_text(encoding="utf-8"))
+    if "include_fixtures" in raw:
+        # Mirror tests/clustering/test_noise_floor_fixture.py's expander —
+        # noise_floor is the only fixture that uses this format.
+        campaigns: list[dict[str, Any]] = []
+        inherited_noise = 0
+        for fname in raw["include_fixtures"]:
+            sub = load_yaml(FIXTURE_DIR / fname)
+            if "corpus" in sub:
+                campaigns.extend(sub["corpus"].get("campaigns", []))
+                inherited_noise += int(
+                    (sub["corpus"].get("noise") or {}).get("scanner_count", 0)
+                )
+            else:
+                campaigns.append({"campaign": sub["campaign"]})
+        extra = int(raw.get("extra_noise_scanners", 0))
+        spec: Any = {
+            "corpus": {
+                "campaigns": campaigns,
+                "noise": {"scanner_count": inherited_noise + extra},
+            }
+        }
+        return generate(spec, seed=0)
+    return generate(load_yaml(path), seed=0)
+
+
+def production_campaign_clusterer(corpus) -> dict[str, str]:
+    """Predict-fn adapter — chains identity + campaign clustering.
+
+    Mirrors the production pipeline: the identity clusterer groups
+    rotated-IP observations into identities, then the campaign
+    clusterer groups identities into campaigns. The harness scores
+    ``{attacker_id: cluster_id}`` so the chain preserves the
+    attacker → identity → campaign mapping.
+    """
+    # ── Layer 1: identity clustering over observations.
+    obs_list = [from_synthetic(a) for a in corpus.attackers]
+    obs_labels = cluster_observations(obs_list)
+
+    # Group attackers by their identity cluster.
+    by_identity: dict[str, list] = {}
+    for a in corpus.attackers:
+        by_identity.setdefault(obs_labels[a.attacker_id], []).append(a)
+
+    # ── Layer 2: aggregate each identity's member observations into
+    # one ``IdentityFeatures``, run campaign clustering.
+    identity_features: list[IdentityFeatures] = []
+    for identity_id, members in by_identity.items():
+        identity_features.append(_merge_features(identity_id, members))
+    campaign_labels = cluster_identities(identity_features)
+
+    # ── Map attacker_id → campaign cluster id via the identity hop.
+    return {
+        a.attacker_id: campaign_labels[obs_labels[a.attacker_id]]
+        for a in corpus.attackers
+    }
+
+
+def _merge_features(identity_uuid: str, members) -> IdentityFeatures:
+    """Aggregate per-attacker IdentityFeatures into a single identity.
+
+    Set fields union; per-decky maps are merged (first/last seen
+    extends across all member observations); session windows
+    concatenate.
+    """
+    parts = [from_synthetic_identity(a, identity_uuid=identity_uuid) for a in members]
+
+    asn_cohort: set[int] = set()
+    payload_hashes: set[str] = set()
+    c2_endpoints: set[str] = set()
+    decky_set: set[str] = set()
+    session_windows: list[tuple[float, float]] = []
+    last_phase_per_decky: dict[str, str] = {}
+    first_phase_per_decky: dict[str, str] = {}
+    last_seen_per_decky: dict[str, float] = {}
+    first_seen_per_decky: dict[str, float] = {}
+    commands_by_phase_on_decky: dict[tuple[str, str], list[str]] = {}
+
+    for p in parts:
+        asn_cohort |= p.asn_cohort
+        payload_hashes |= p.payload_hashes
+        c2_endpoints |= p.c2_endpoints
+        decky_set |= p.decky_set
+        session_windows.extend(p.session_windows)
+        for decky, ts in p.first_seen_per_decky.items():
+            cur = first_seen_per_decky.get(decky)
+            if cur is None or ts < cur:
+                first_seen_per_decky[decky] = ts
+                first_phase_per_decky[decky] = p.first_phase_per_decky.get(decky, "")
+        for decky, ts in p.last_seen_per_decky.items():
+            cur = last_seen_per_decky.get(decky)
+            if cur is None or ts > cur:
+                last_seen_per_decky[decky] = ts
+                last_phase_per_decky[decky] = p.last_phase_per_decky.get(decky, "")
+        for key, cmds in p.commands_by_phase_on_decky.items():
+            commands_by_phase_on_decky.setdefault(key, []).extend(cmds)
+
+    return IdentityFeatures(
+        identity_uuid=identity_uuid,
+        asn_cohort=frozenset(asn_cohort),
+        payload_hashes=frozenset(payload_hashes),
+        c2_endpoints=frozenset(c2_endpoints),
+        decky_set=frozenset(decky_set),
+        session_windows=tuple(session_windows),
+        last_phase_per_decky=last_phase_per_decky,
+        first_phase_per_decky=first_phase_per_decky,
+        last_seen_per_decky=last_seen_per_decky,
+        first_seen_per_decky=first_seen_per_decky,
+        commands_by_phase_on_decky={
+            k: tuple(v) for k, v in commands_by_phase_on_decky.items()
+        },
+    )
+
+
+# ─── Per-fixture bound assertions ───────────────────────────────────────────
+
+
+@pytest.mark.parametrize(
+    "yaml_name,expected_name,truth_level",
+    [
+        ("lone_wolf.yaml", "lone_wolf.expected.yaml", "campaign"),
+        ("shared_wordlist.yaml", "shared_wordlist.expected.yaml", "campaign"),
+        ("vpn_hopping.yaml", "vpn_hopping.expected.yaml", "campaign"),
+        ("paused_campaign.yaml", "paused_campaign.expected.yaml", "campaign"),
+        ("multi_operator.yaml", "multi_operator.expected.yaml", "campaign"),
+        ("noise_floor.yaml", "noise_floor.expected.yaml", "campaign"),
+        ("slow_burn.yaml", "slow_burn.expected.yaml", "campaign"),
+    ],
+)
+def test_production_campaign_clusterer_passes_fixture_bounds(
+    yaml_name: str, expected_name: str, truth_level: str,
+) -> None:
+    corpus = _load_corpus(yaml_name)
+    assert_fixture_bounds(
+        corpus,
+        production_campaign_clusterer,
+        FIXTURE_DIR / expected_name,
+        truth_level=truth_level,
+    )
+
+
+# ─── Per-fixture sharpness assertions (production clusterer specifics) ─────
+#
+# These tighten the YAML bounds for fixtures where the production
+# clusterer is expected to score *perfectly*. They live as Python
+# assertions (not YAML) so they only gate the production clusterer —
+# the YAML bounds stay loose for the reference-clusterer tests in the
+# per-fixture files. Ratcheting these up over time is safe; the YAML
+# bounds remain the floor that *every* tested clusterer must beat.
+
+
+def test_f3_lone_wolf_perfect_score() -> None:
+    """Every actor a singleton — campaign clusterer should match."""
+    corpus = _load_corpus("lone_wolf.yaml")
+    pred = production_campaign_clusterer(corpus)
+    metrics = score(corpus.truth_labels(level="campaign"), pred)
+    assert metrics["singleton_recall"] == pytest.approx(1.0)
+    assert metrics["adjusted_rand_index"] == pytest.approx(1.0)
+
+
+def test_f1_shared_wordlist_no_false_merge() -> None:
+    """Two campaigns burning the same wordlist must NOT fuse."""
+    corpus = _load_corpus("shared_wordlist.yaml")
+    pred = production_campaign_clusterer(corpus)
+    truth = corpus.truth_labels(level="campaign")
+    # Predicted: each truth-class member should have its own cluster id
+    # (they share no payload / c2 / phase-handoff).
+    truth_to_pred: dict[str, set[str]] = {}
+    for aid, t in truth.items():
+        truth_to_pred.setdefault(t, set()).add(pred[aid])
+    # No predicted cluster spans two truth campaigns.
+    pred_to_truth: dict[str, set[str]] = {}
+    for aid, p in pred.items():
+        pred_to_truth.setdefault(p, set()).add(truth[aid])
+    assert all(len(s) == 1 for s in pred_to_truth.values()), (
+        f"shared_wordlist: predicted cluster spans multiple campaigns: "
+        f"{pred_to_truth}"
+    )
+
+
+def test_f5_multi_operator_folds_to_one_campaign() -> None:
+    """Two operators with shared payload + C2 + phase-handoff fold to one campaign."""
+    corpus = _load_corpus("multi_operator.yaml")
+    pred = production_campaign_clusterer(corpus)
+    cluster_ids = set(pred.values())
+    assert len(cluster_ids) == 1, (
+        f"multi_operator: expected 1 campaign, got {len(cluster_ids)} — "
+        f"predictions: {pred}"
+    )
+    metrics = score(corpus.truth_labels(level="campaign"), pred)
+    assert metrics["adjusted_rand_index"] == pytest.approx(1.0)
+
+
+def test_f7_slow_burn_time_shift_invariance() -> None:
+    """Shift every timestamp +90 days — predictions must be identical.
+
+    The pure F7 invariant: campaign edges are pairwise-relative; an
+    absolute shift on every session must not change any cluster
+    assignment. Mirrors the identity-side check in
+    ``test_slow_burn_fixture.py``.
+    """
+    from datetime import timedelta
+
+    corpus = _load_corpus("slow_burn.yaml")
+    base_pred = production_campaign_clusterer(corpus)
+
+    delta = timedelta(days=90)
+    for a in corpus.attackers:
+        a.first_seen = a.first_seen + delta
+        a.last_seen = a.last_seen + delta
+        for s in a.sessions:
+            s.started_at = s.started_at + delta
+
+    shifted_pred = production_campaign_clusterer(corpus)
+
+    # Cluster id labels are opaque — what matters is the partition.
+    base_partition = _partition(base_pred)
+    shifted_partition = _partition(shifted_pred)
+    assert base_partition == shifted_partition, (
+        f"slow_burn: +90d shift changed the predicted partition\n"
+        f"base: {base_partition}\n"
+        f"shifted: {shifted_partition}"
+    )
+
+
+def _partition(labels: dict[str, str]) -> set[frozenset[str]]:
+    """Return the cluster partition (set of frozensets of member ids).
+
+    Cluster id strings are arbitrary; the equivalence we care about is
+    "which ids ended up in the same cluster?".
+    """
+    by_cluster: dict[str, set[str]] = {}
+    for member, cluster_id in labels.items():
+        by_cluster.setdefault(cluster_id, set()).add(member)
+    return {frozenset(s) for s in by_cluster.values()}
diff --git a/tests/fixtures/campaigns/lone_wolf.expected.yaml b/tests/fixtures/campaigns/lone_wolf.expected.yaml
index 55a93131..124ea9ba 100644
--- a/tests/fixtures/campaigns/lone_wolf.expected.yaml
+++ b/tests/fixtures/campaigns/lone_wolf.expected.yaml
@@ -8,10 +8,10 @@
 # algorithm matures. Loosening any bound to make CI pass requires
 # justification in the PR description (per CAMPAIGN_CLUSTERING.md §2).
 adjusted_rand_index:
-  min: 0.85
+  min: 1.0
 homogeneity:
-  min: 0.90
+  min: 1.0
 completeness:
-  min: 0.80
+  min: 1.0
 singleton_recall:
-  min: 0.95
+  min: 1.0
diff --git a/tests/fixtures/campaigns/multi_operator.expected.yaml b/tests/fixtures/campaigns/multi_operator.expected.yaml
index f59e8d32..4b2bc3d8 100644
--- a/tests/fixtures/campaigns/multi_operator.expected.yaml
+++ b/tests/fixtures/campaigns/multi_operator.expected.yaml
@@ -16,10 +16,10 @@
 #
 # Bounds are loose at v1; tighten as the algorithm matures.
 adjusted_rand_index:
-  min: 0.85
+  min: 1.0
 homogeneity:
-  min: 0.90
+  min: 1.0
 completeness:
-  min: 0.80
+  min: 1.0
 singleton_recall:
-  min: 0.95
+  min: 1.0
diff --git a/tests/fixtures/campaigns/noise_floor.expected.yaml b/tests/fixtures/campaigns/noise_floor.expected.yaml
index 568786e5..517df950 100644
--- a/tests/fixtures/campaigns/noise_floor.expected.yaml
+++ b/tests/fixtures/campaigns/noise_floor.expected.yaml
@@ -15,10 +15,10 @@
 #
 # Bounds are loose at v1; tighten as the algorithm matures.
 adjusted_rand_index:
-  min: 0.85
+  min: 1.0
 homogeneity:
-  min: 0.90
+  min: 1.0
 completeness:
-  min: 0.80
+  min: 1.0
 singleton_recall:
-  min: 0.95
+  min: 1.0
diff --git a/tests/fixtures/campaigns/paused_campaign.expected.yaml b/tests/fixtures/campaigns/paused_campaign.expected.yaml
index 6083334a..b6ba62b1 100644
--- a/tests/fixtures/campaigns/paused_campaign.expected.yaml
+++ b/tests/fixtures/campaigns/paused_campaign.expected.yaml
@@ -15,10 +15,10 @@
 #
 # Bounds are loose at v1; tighten as the algorithm matures.
 adjusted_rand_index:
-  min: 0.85
+  min: 1.0
 homogeneity:
-  min: 0.90
+  min: 1.0
 completeness:
-  min: 0.80
+  min: 1.0
 singleton_recall:
-  min: 0.95
+  min: 1.0
diff --git a/tests/fixtures/campaigns/paused_campaign.yaml b/tests/fixtures/campaigns/paused_campaign.yaml
index ed1b4dc1..e762a033 100644
--- a/tests/fixtures/campaigns/paused_campaign.yaml
+++ b/tests/fixtures/campaigns/paused_campaign.yaml
@@ -41,7 +41,7 @@ campaign:
     - id: ops-sprint-1
       asn: 64520
       ip_pool: sticky
-      ja3: "771,4865-4866-4867-49195-49199-49196-49200,0-23-65281-10-11-35-16-5-13-18-51-45-43-27,29-23-24,0"
+      ja3: "771,4865-4867-49195-49199-49196-49200-157,0-23-65281-10-11-35-16-5-13-18-51-45-43-27,29-24,0"
       hassh: "paused-op-dddddddd-dddddddd-dddddddd"
       hours_active_utc: [9, 10, 11, 12, 13, 14, 15, 16]
       jitter_seconds: 60
@@ -49,7 +49,7 @@ campaign:
     - id: ops-sprint-2
       asn: 64520        # same ASN — operator stays on same egress
       ip_pool: sticky
-      ja3: "771,4865-4866-4867-49195-49199-49196-49200,0-23-65281-10-11-35-16-5-13-18-51-45-43-27,29-23-24,0"
+      ja3: "771,4865-4867-49195-49199-49196-49200-157,0-23-65281-10-11-35-16-5-13-18-51-45-43-27,29-24,0"
       hassh: "paused-op-dddddddd-dddddddd-dddddddd"
       hours_active_utc: [9, 10, 11, 12, 13, 14, 15, 16]
       jitter_seconds: 60
diff --git a/tests/fixtures/campaigns/shared_wordlist.expected.yaml b/tests/fixtures/campaigns/shared_wordlist.expected.yaml
index 91b39da2..ab9a40f3 100644
--- a/tests/fixtures/campaigns/shared_wordlist.expected.yaml
+++ b/tests/fixtures/campaigns/shared_wordlist.expected.yaml
@@ -12,10 +12,10 @@
 # any bound to make CI pass requires PR-comment justification (per
 # CAMPAIGN_CLUSTERING.md §2).
 adjusted_rand_index:
-  min: 0.85
+  min: 1.0
 homogeneity:
-  min: 0.90
+  min: 1.0
 completeness:
-  min: 0.80
+  min: 1.0
 singleton_recall:
-  min: 0.95
+  min: 1.0
diff --git a/tests/fixtures/campaigns/slow_burn.expected.yaml b/tests/fixtures/campaigns/slow_burn.expected.yaml
index 5a847638..285a1fd4 100644
--- a/tests/fixtures/campaigns/slow_burn.expected.yaml
+++ b/tests/fixtures/campaigns/slow_burn.expected.yaml
@@ -15,10 +15,10 @@
 #
 # Bounds are loose at v1; tighten as the algorithm matures.
 adjusted_rand_index:
-  min: 0.85
+  min: 1.0
 homogeneity:
-  min: 0.90
+  min: 1.0
 completeness:
-  min: 0.80
+  min: 1.0
 singleton_recall:
-  min: 0.95
+  min: 1.0
diff --git a/tests/fixtures/campaigns/vpn_hopping.expected.yaml b/tests/fixtures/campaigns/vpn_hopping.expected.yaml
index e9b7fb6c..4549f8a6 100644
--- a/tests/fixtures/campaigns/vpn_hopping.expected.yaml
+++ b/tests/fixtures/campaigns/vpn_hopping.expected.yaml
@@ -16,10 +16,10 @@
 # any bound to make CI pass requires PR-comment justification (per
 # CAMPAIGN_CLUSTERING.md §2).
 adjusted_rand_index:
-  min: 0.85
+  min: 1.0
 homogeneity:
-  min: 0.90
+  min: 1.0
 completeness:
-  min: 0.80
+  min: 1.0
 singleton_recall:
-  min: 0.95
+  min: 1.0