diff --git a/packages/testing/src/consensus_testing/test_fixtures/slot_clock.py b/packages/testing/src/consensus_testing/test_fixtures/slot_clock.py
index 6bf5273d3..69688c4d7 100644
--- a/packages/testing/src/consensus_testing/test_fixtures/slot_clock.py
+++ b/packages/testing/src/consensus_testing/test_fixtures/slot_clock.py
@@ -8,12 +8,12 @@
 from typing import Any, ClassVar
 
 from lean_spec.node.chain.clock import Interval, SlotClock
-from lean_spec.node.chain.config import (
+from lean_spec.spec.forks import Slot
+from lean_spec.spec.forks.lstar.config import (
     INTERVALS_PER_SLOT,
     MILLISECONDS_PER_INTERVAL,
     SECONDS_PER_SLOT,
 )
-from lean_spec.spec.forks import Slot
 from lean_spec.spec.ssz import Uint64
 
 from .base import BaseConsensusFixture
diff --git a/src/lean_spec/cli/run.py b/src/lean_spec/cli/run.py
index 01b260c04..2b8fccd40 100644
--- a/src/lean_spec/cli/run.py
+++ b/src/lean_spec/cli/run.py
@@ -17,13 +17,13 @@
 
 import logging
 
-from lean_spec.node.chain.config import ATTESTATION_COMMITTEE_COUNT
 from lean_spec.node.metrics import PrometheusObserver, registry as metrics
 from lean_spec.node.networking.client import LiveNetworkEventSource
 from lean_spec.node.networking.gossipsub import GossipTopic
 from lean_spec.node.node import Node, NodeConfig
 from lean_spec.node.observability import set_observer
 from lean_spec.spec.forks import SubnetId
+from lean_spec.spec.forks.lstar.config import ATTESTATION_COMMITTEE_COUNT
 
 from .bootstrap import NodeBootstrap
 
diff --git a/src/lean_spec/node/chain/clock.py b/src/lean_spec/node/chain/clock.py
index 934e76c04..90369e630 100644
--- a/src/lean_spec/node/chain/clock.py
+++ b/src/lean_spec/node/chain/clock.py
@@ -15,14 +15,13 @@
 from dataclasses import dataclass
 from time import time as wall_time
 
-from lean_spec.spec.ssz import Uint64
-
-from .config import (
+from lean_spec.spec.forks.lstar.config import (
     INTERVALS_PER_SLOT,
     MILLISECONDS_PER_INTERVAL,
     MILLISECONDS_PER_SLOT,
     SECONDS_PER_SLOT,
 )
+from lean_spec.spec.ssz import Uint64
 
 
 class Interval(Uint64):
diff --git a/src/lean_spec/node/chain/service.py b/src/lean_spec/node/chain/service.py
index f53e9f0d4..b3e3ebc5c 100644
--- a/src/lean_spec/node/chain/service.py
+++ b/src/lean_spec/node/chain/service.py
@@ -26,9 +26,9 @@
 import logging
 from dataclasses import dataclass, field
 
-from lean_spec.node.chain.config import INTERVALS_PER_SLOT
 from lean_spec.node.sync import SyncService
 from lean_spec.spec.forks import LstarSpec, SignedAggregatedAttestation
+from lean_spec.spec.forks.lstar.config import INTERVALS_PER_SLOT
 
 from .clock import Interval, SlotClock
 
diff --git a/src/lean_spec/node/networking/gossipsub/parameters.py b/src/lean_spec/node/networking/gossipsub/parameters.py
index 5feb9ea76..e4619820d 100644
--- a/src/lean_spec/node/networking/gossipsub/parameters.py
+++ b/src/lean_spec/node/networking/gossipsub/parameters.py
@@ -60,9 +60,9 @@
 from __future__ import annotations
 
 from lean_spec.base import StrictBaseModel
-from lean_spec.node.chain.config import JUSTIFICATION_LOOKBACK_SLOTS, SECONDS_PER_SLOT
 from lean_spec.node.networking.config import GOSSIPSUB_DEFAULT_PROTOCOL_ID
 from lean_spec.node.networking.types import ProtocolId
+from lean_spec.spec.forks.lstar.config import JUSTIFICATION_LOOKBACK_SLOTS, SECONDS_PER_SLOT
 
 
 class GossipsubParameters(StrictBaseModel):
diff --git a/src/lean_spec/node/node.py b/src/lean_spec/node/node.py
index d940af661..9a32b2945 100644
--- a/src/lean_spec/node/node.py
+++ b/src/lean_spec/node/node.py
@@ -22,7 +22,6 @@
 from lean_spec.node.api import AggregatorController, ApiServer, ApiServerConfig
 from lean_spec.node.chain import SlotClock
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import ATTESTATION_COMMITTEE_COUNT
 from lean_spec.node.chain.service import ChainService
 from lean_spec.node.metrics import registry as metrics
 from lean_spec.node.networking import NetworkService
@@ -44,6 +43,7 @@
     ValidatorIndex,
     Validators,
 )
+from lean_spec.spec.forks.lstar.config import ATTESTATION_COMMITTEE_COUNT
 from lean_spec.spec.ssz import Bytes32, Uint64
 
 logger = logging.getLogger(__name__)
diff --git a/src/lean_spec/node/chain/config.py b/src/lean_spec/spec/forks/lstar/config.py
similarity index 95%
rename from src/lean_spec/node/chain/config.py
rename to src/lean_spec/spec/forks/lstar/config.py
index a7b7e7b1c..ca4e56aa1 100644
--- a/src/lean_spec/node/chain/config.py
+++ b/src/lean_spec/spec/forks/lstar/config.py
@@ -45,8 +45,7 @@
 """
 The maximum number of historical block roots to store in the state.
 
-With a 4-second slot, this corresponds to a history
-of approximately 12.1 days.
+With a 4-second slot, this corresponds to a history of approximately 12.1 days.
 """
 
 ATTESTATION_COMMITTEE_COUNT: Final = Uint64(1)
diff --git a/src/lean_spec/spec/forks/lstar/containers.py b/src/lean_spec/spec/forks/lstar/containers.py
index cc6b02251..65f9b6373 100644
--- a/src/lean_spec/spec/forks/lstar/containers.py
+++ b/src/lean_spec/spec/forks/lstar/containers.py
@@ -15,8 +15,8 @@
 from lean_spec.base import StrictBaseModel
 from lean_spec.config import LEAN_ENV
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import HISTORICAL_ROOTS_LIMIT
 from lean_spec.spec.crypto.xmss.containers import PublicKey, Signature
+from lean_spec.spec.forks.lstar.config import HISTORICAL_ROOTS_LIMIT
 from lean_spec.spec.ssz import Boolean, ByteList512KiB, Bytes32, Bytes52, Container, SSZList, Uint64
 from lean_spec.spec.ssz.bitfields import BaseBitlist
 
diff --git a/src/lean_spec/spec/forks/lstar/spec.py b/src/lean_spec/spec/forks/lstar/spec.py
index b36371fb8..5c4c973dd 100644
--- a/src/lean_spec/spec/forks/lstar/spec.py
+++ b/src/lean_spec/spec/forks/lstar/spec.py
@@ -7,12 +7,6 @@
 from typing import Any, ClassVar
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import (
-    GOSSIP_DISPARITY_INTERVALS,
-    INTERVALS_PER_SLOT,
-    JUSTIFICATION_LOOKBACK_SLOTS,
-    MAX_ATTESTATIONS_DATA,
-)
 from lean_spec.node.observability import (
     observe_on_attestation,
     observe_on_block,
@@ -22,6 +16,12 @@
 from lean_spec.spec.crypto.xmss.containers import PublicKey
 from lean_spec.spec.crypto.xmss.interface import TARGET_SIGNATURE_SCHEME
 from lean_spec.spec.forks.lstar.aggregation_select import select_greedily
+from lean_spec.spec.forks.lstar.config import (
+    GOSSIP_DISPARITY_INTERVALS,
+    INTERVALS_PER_SLOT,
+    JUSTIFICATION_LOOKBACK_SLOTS,
+    MAX_ATTESTATIONS_DATA,
+)
 from lean_spec.spec.forks.lstar.containers import (
     AggregatedAttestation,
     AggregatedAttestations,
diff --git a/tests/consensus/lstar/fc/test_attestation_target_selection.py b/tests/consensus/lstar/fc/test_attestation_target_selection.py
index 2f33baf8e..4a52c32ab 100644
--- a/tests/consensus/lstar/fc/test_attestation_target_selection.py
+++ b/tests/consensus/lstar/fc/test_attestation_target_selection.py
@@ -9,8 +9,8 @@
     StoreChecks,
 )
 
-from lean_spec.node.chain.config import JUSTIFICATION_LOOKBACK_SLOTS
 from lean_spec.spec.forks import Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar.config import JUSTIFICATION_LOOKBACK_SLOTS
 
 pytestmark = pytest.mark.valid_until("Lstar")
 
diff --git a/tests/consensus/lstar/fc/test_block_attestation_limits.py b/tests/consensus/lstar/fc/test_block_attestation_limits.py
index 8b6d27dec..ac8aa3fc5 100644
--- a/tests/consensus/lstar/fc/test_block_attestation_limits.py
+++ b/tests/consensus/lstar/fc/test_block_attestation_limits.py
@@ -12,8 +12,8 @@
 )
 from consensus_testing.keys import XmssKeyManager
 
-from lean_spec.node.chain.config import MAX_ATTESTATIONS_DATA
 from lean_spec.spec.forks import Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar.config import MAX_ATTESTATIONS_DATA
 
 pytestmark = pytest.mark.valid_until("Lstar")
 
diff --git a/tests/consensus/lstar/fc/test_block_production.py b/tests/consensus/lstar/fc/test_block_production.py
index 85e303276..f0e0e7b92 100644
--- a/tests/consensus/lstar/fc/test_block_production.py
+++ b/tests/consensus/lstar/fc/test_block_production.py
@@ -16,13 +16,13 @@
     TickStep,
 )
 
-from lean_spec.node.chain.config import (
+from lean_spec.spec.forks import Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar.config import (
     INTERVALS_PER_SLOT,
     MAX_ATTESTATIONS_DATA,
     MILLISECONDS_PER_INTERVAL,
     SECONDS_PER_SLOT,
 )
-from lean_spec.spec.forks import Slot, ValidatorIndex
 
 pytestmark = pytest.mark.valid_until("Lstar")
 
diff --git a/tests/consensus/lstar/fc/test_checkpoint_sync.py b/tests/consensus/lstar/fc/test_checkpoint_sync.py
index dea034a0a..3e373f8e9 100644
--- a/tests/consensus/lstar/fc/test_checkpoint_sync.py
+++ b/tests/consensus/lstar/fc/test_checkpoint_sync.py
@@ -12,9 +12,9 @@
 )
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import INTERVALS_PER_SLOT, SECONDS_PER_SLOT
 from lean_spec.spec.crypto.merkleization import hash_tree_root
 from lean_spec.spec.forks import Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar.config import INTERVALS_PER_SLOT, SECONDS_PER_SLOT
 from lean_spec.spec.ssz import Bytes32
 
 pytestmark = pytest.mark.valid_until("Lstar")
diff --git a/tests/consensus/lstar/fc/test_gossip_aggregated_attestation_validation.py b/tests/consensus/lstar/fc/test_gossip_aggregated_attestation_validation.py
index 7b3ed18c0..4aac6dfc7 100644
--- a/tests/consensus/lstar/fc/test_gossip_aggregated_attestation_validation.py
+++ b/tests/consensus/lstar/fc/test_gossip_aggregated_attestation_validation.py
@@ -12,8 +12,8 @@
 )
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import GOSSIP_DISPARITY_INTERVALS
 from lean_spec.spec.forks import Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar.config import GOSSIP_DISPARITY_INTERVALS
 from lean_spec.spec.ssz import Bytes32
 
 pytestmark = pytest.mark.valid_until("Lstar")
diff --git a/tests/consensus/lstar/fc/test_gossip_attestation_validation.py b/tests/consensus/lstar/fc/test_gossip_attestation_validation.py
index 0fd2c6032..9c45f36ff 100644
--- a/tests/consensus/lstar/fc/test_gossip_attestation_validation.py
+++ b/tests/consensus/lstar/fc/test_gossip_attestation_validation.py
@@ -12,8 +12,8 @@
 )
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import GOSSIP_DISPARITY_INTERVALS
 from lean_spec.spec.forks import Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar.config import GOSSIP_DISPARITY_INTERVALS
 from lean_spec.spec.ssz import Bytes32
 
 pytestmark = pytest.mark.valid_until("Lstar")
diff --git a/tests/interop/helpers/node_runner.py b/tests/interop/helpers/node_runner.py
index 41f68afdd..c1da8fba3 100644
--- a/tests/interop/helpers/node_runner.py
+++ b/tests/interop/helpers/node_runner.py
@@ -12,7 +12,6 @@
 from dataclasses import dataclass, field
 from typing import cast
 
-from lean_spec.node.chain.config import ATTESTATION_COMMITTEE_COUNT
 from lean_spec.node.networking import PeerId
 from lean_spec.node.networking.client import LiveNetworkEventSource
 from lean_spec.node.networking.gossipsub.types import TopicId
@@ -25,6 +24,7 @@
 from lean_spec.spec.crypto.xmss import TARGET_SIGNATURE_SCHEME, SecretKey
 from lean_spec.spec.forks import Checkpoint, Slot, ValidatorIndex
 from lean_spec.spec.forks.lstar import Store
+from lean_spec.spec.forks.lstar.config import ATTESTATION_COMMITTEE_COUNT
 from lean_spec.spec.forks.lstar.containers import Validator, Validators
 from lean_spec.spec.forks.lstar.spec import LstarSpec
 from lean_spec.spec.ssz import Bytes52, Uint64
diff --git a/tests/lean_spec/cli/test_run.py b/tests/lean_spec/cli/test_run.py
index a6b78b106..79218df2f 100644
--- a/tests/lean_spec/cli/test_run.py
+++ b/tests/lean_spec/cli/test_run.py
@@ -11,12 +11,12 @@
 
 from lean_spec.cli import NodeBootstrap
 from lean_spec.cli.run import _build_event_source
-from lean_spec.node.chain.config import ATTESTATION_COMMITTEE_COUNT
 from lean_spec.node.genesis import GenesisConfig
 from lean_spec.node.networking.gossipsub import GossipTopic
 from lean_spec.node.validator import ValidatorRegistry
 from lean_spec.node.validator.registry import ValidatorEntry
 from lean_spec.spec.forks import DEFAULT_REGISTRY, Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar.config import ATTESTATION_COMMITTEE_COUNT
 
 
 class _RecordingEventSource:
diff --git a/tests/lean_spec/node/chain/test_clock.py b/tests/lean_spec/node/chain/test_clock.py
index 1dec5fb40..856d30e0b 100644
--- a/tests/lean_spec/node/chain/test_clock.py
+++ b/tests/lean_spec/node/chain/test_clock.py
@@ -5,13 +5,13 @@
 import pytest
 
 from lean_spec.node.chain import Interval, SlotClock
-from lean_spec.node.chain.config import (
+from lean_spec.spec.forks import Slot
+from lean_spec.spec.forks.lstar.config import (
     INTERVALS_PER_SLOT,
     MILLISECONDS_PER_INTERVAL,
     MILLISECONDS_PER_SLOT,
     SECONDS_PER_SLOT,
 )
-from lean_spec.spec.forks import Slot
 from lean_spec.spec.ssz import Uint64
 
 GENESIS_TIME = Uint64(1_700_000_000)
diff --git a/tests/lean_spec/node/chain/test_service.py b/tests/lean_spec/node/chain/test_service.py
index 5655b1e89..6397afaba 100644
--- a/tests/lean_spec/node/chain/test_service.py
+++ b/tests/lean_spec/node/chain/test_service.py
@@ -7,9 +7,9 @@
 
 from lean_spec.node.chain import SlotClock
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import MILLISECONDS_PER_INTERVAL
 from lean_spec.node.chain.service import ChainService
 from lean_spec.spec.forks import Slot
+from lean_spec.spec.forks.lstar.config import MILLISECONDS_PER_INTERVAL
 from lean_spec.spec.forks.lstar.containers import SignedAggregatedAttestation
 from lean_spec.spec.ssz import ZERO_HASH, Bytes32, Uint64
 from tests.lean_spec.helpers.mocks import StoreInterceptingSpec
diff --git a/tests/lean_spec/node/test_node.py b/tests/lean_spec/node/test_node.py
index f3714693f..c0aff0b66 100644
--- a/tests/lean_spec/node/test_node.py
+++ b/tests/lean_spec/node/test_node.py
@@ -12,12 +12,6 @@
 
 from lean_spec.node.api import ApiServerConfig
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import (
-    ATTESTATION_COMMITTEE_COUNT,
-    HISTORICAL_ROOTS_LIMIT,
-    INTERVALS_PER_SLOT,
-    SECONDS_PER_SLOT,
-)
 from lean_spec.node.node import Node, NodeConfig
 from lean_spec.node.storage.sqlite import SQLiteDatabase
 from lean_spec.node.validator import ValidatorRegistry
@@ -25,6 +19,12 @@
 from lean_spec.spec.crypto.merkleization import hash_tree_root
 from lean_spec.spec.forks import Checkpoint, Slot, ValidatorIndex
 from lean_spec.spec.forks.lstar import State
+from lean_spec.spec.forks.lstar.config import (
+    ATTESTATION_COMMITTEE_COUNT,
+    HISTORICAL_ROOTS_LIMIT,
+    INTERVALS_PER_SLOT,
+    SECONDS_PER_SLOT,
+)
 from lean_spec.spec.forks.lstar.containers import (
     AggregatedAttestations,
     Block,
diff --git a/tests/lean_spec/node/validator/test_service.py b/tests/lean_spec/node/validator/test_service.py
index 083ef7ff8..47b769851 100644
--- a/tests/lean_spec/node/validator/test_service.py
+++ b/tests/lean_spec/node/validator/test_service.py
@@ -8,7 +8,6 @@
 from consensus_testing.keys import XmssKeyManager
 
 from lean_spec.node.chain.clock import SlotClock
-from lean_spec.node.chain.config import MILLISECONDS_PER_INTERVAL
 from lean_spec.node.sync.block_cache import BlockCache
 from lean_spec.node.sync.peer_manager import PeerManager
 from lean_spec.node.sync.service import SyncService
@@ -19,6 +18,7 @@
 from lean_spec.spec.crypto.xmss import TARGET_SIGNATURE_SCHEME
 from lean_spec.spec.forks import Slot, ValidatorIndex
 from lean_spec.spec.forks.lstar import Store
+from lean_spec.spec.forks.lstar.config import MILLISECONDS_PER_INTERVAL
 from lean_spec.spec.forks.lstar.containers import (
     AttestationData,
     Block,
diff --git a/tests/lean_spec/spec/forks/lstar/forkchoice/test_attestation_target.py b/tests/lean_spec/spec/forks/lstar/forkchoice/test_attestation_target.py
index ef3dac020..a13ebcbb7 100644
--- a/tests/lean_spec/spec/forks/lstar/forkchoice/test_attestation_target.py
+++ b/tests/lean_spec/spec/forks/lstar/forkchoice/test_attestation_target.py
@@ -6,10 +6,10 @@
 from consensus_testing.keys import XmssKeyManager
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import JUSTIFICATION_LOOKBACK_SLOTS
 from lean_spec.spec.crypto.merkleization import hash_tree_root
 from lean_spec.spec.forks import Checkpoint, Slot, ValidatorIndex
 from lean_spec.spec.forks.lstar import Store
+from lean_spec.spec.forks.lstar.config import JUSTIFICATION_LOOKBACK_SLOTS
 from lean_spec.spec.forks.lstar.containers import (
     Attestation,
     AttestationData,
diff --git a/tests/lean_spec/spec/forks/lstar/forkchoice/test_store_attestations.py b/tests/lean_spec/spec/forks/lstar/forkchoice/test_store_attestations.py
index aa4212c00..5f8021979 100644
--- a/tests/lean_spec/spec/forks/lstar/forkchoice/test_store_attestations.py
+++ b/tests/lean_spec/spec/forks/lstar/forkchoice/test_store_attestations.py
@@ -6,10 +6,10 @@
 from consensus_testing.keys import XmssKeyManager
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import INTERVALS_PER_SLOT
 from lean_spec.spec.crypto.merkleization import hash_tree_root
 from lean_spec.spec.forks import Checkpoint, Slot, ValidatorIndex
 from lean_spec.spec.forks.lstar import AttestationSignatureEntry
+from lean_spec.spec.forks.lstar.config import INTERVALS_PER_SLOT
 from lean_spec.spec.forks.lstar.containers import (
     AttestationData,
     SignedAggregatedAttestation,
diff --git a/tests/lean_spec/spec/forks/lstar/forkchoice/test_time_management.py b/tests/lean_spec/spec/forks/lstar/forkchoice/test_time_management.py
index 52b461ed7..fb02fc235 100644
--- a/tests/lean_spec/spec/forks/lstar/forkchoice/test_time_management.py
+++ b/tests/lean_spec/spec/forks/lstar/forkchoice/test_time_management.py
@@ -3,15 +3,15 @@
 from hypothesis import given, settings, strategies as st
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import (
+from lean_spec.spec.crypto.merkleization import hash_tree_root
+from lean_spec.spec.forks import Slot, ValidatorIndex
+from lean_spec.spec.forks.lstar import Store
+from lean_spec.spec.forks.lstar.config import (
     INTERVALS_PER_SLOT,
     MILLISECONDS_PER_INTERVAL,
     MILLISECONDS_PER_SLOT,
     SECONDS_PER_SLOT,
 )
-from lean_spec.spec.crypto.merkleization import hash_tree_root
-from lean_spec.spec.forks import Slot, ValidatorIndex
-from lean_spec.spec.forks.lstar import Store
 from lean_spec.spec.forks.lstar.containers import Block, Validators
 from lean_spec.spec.forks.lstar.spec import LstarSpec
 from lean_spec.spec.ssz import Bytes32, Uint64
diff --git a/tests/lean_spec/spec/forks/lstar/forkchoice/test_validate_attestation.py b/tests/lean_spec/spec/forks/lstar/forkchoice/test_validate_attestation.py
index 62431a8a4..c80b9c230 100644
--- a/tests/lean_spec/spec/forks/lstar/forkchoice/test_validate_attestation.py
+++ b/tests/lean_spec/spec/forks/lstar/forkchoice/test_validate_attestation.py
@@ -5,10 +5,10 @@
 import pytest
 
 from lean_spec.node.chain.clock import Interval
-from lean_spec.node.chain.config import GOSSIP_DISPARITY_INTERVALS, INTERVALS_PER_SLOT
 from lean_spec.spec.crypto.merkleization import hash_tree_root
 from lean_spec.spec.forks import Checkpoint, Slot, ValidatorIndex
 from lean_spec.spec.forks.lstar import Store
+from lean_spec.spec.forks.lstar.config import GOSSIP_DISPARITY_INTERVALS, INTERVALS_PER_SLOT
 from lean_spec.spec.forks.lstar.containers import (
     Attestation,
     AttestationData,