diff --git a/fbpcs/bolt/bolt_runner.py b/fbpcs/bolt/bolt_runner.py
index 7b8e20c48..08f93e1d0 100644
--- a/fbpcs/bolt/bolt_runner.py
+++ b/fbpcs/bolt/bolt_runner.py
@@ -341,7 +341,10 @@ async def _run_hooks(
                 {stage, None}, {role, None}, {when, None}, {event, None}
             )
             for hook in job.hooks.get(
-                BoltHookKey(event=e, when=w, stage=s.name if s else s, role=r), []
+                # pyre-fixme[6]: For 3rd argument expected `Optional[str]` but got
+                #  `Union[None, PrivateComputationBaseStageFlow, str]`.
+                BoltHookKey(event=e, when=w, stage=s.name if s else s, role=r),
+                [],
             )
         )
 
diff --git a/fbpcs/bolt/read_config.py b/fbpcs/bolt/read_config.py
index 4fc82f93e..8ef271666 100644
--- a/fbpcs/bolt/read_config.py
+++ b/fbpcs/bolt/read_config.py
@@ -14,6 +14,9 @@
 from fbpcs.bolt.bolt_runner import BoltRunner
 from fbpcs.bolt.constants import DEFAULT_POLL_INTERVAL_SEC
 from fbpcs.bolt.oss_bolt_pcs import BoltPCSClient, BoltPCSCreateInstanceArgs
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation_cli.private_computation_service_wrapper`.
 from fbpcs.private_computation_cli.private_computation_service_wrapper import (
     build_private_computation_service,
 )
@@ -45,6 +48,7 @@ def create_bolt_runner(
         runner_config["partner_client_config"]
     )
     publisher_client = BoltPCSClient(
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `private_computation_cli`.
         build_private_computation_service(
             publisher_client_config["private_computation"],
             publisher_client_config["mpc"],
@@ -54,6 +58,7 @@ def create_bolt_runner(
         )
     )
     partner_client = BoltPCSClient(
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `private_computation_cli`.
         build_private_computation_service(
             partner_client_config["private_computation"],
             partner_client_config["mpc"],
diff --git a/fbpcs/common/feature/pcs_feature_gate_utils.py b/fbpcs/common/feature/pcs_feature_gate_utils.py
index 54ca4add3..d0f5d1daa 100644
--- a/fbpcs/common/feature/pcs_feature_gate_utils.py
+++ b/fbpcs/common/feature/pcs_feature_gate_utils.py
@@ -7,23 +7,43 @@
 # pyre-strict
 from typing import Optional, Set, Type
 
+# pyre-fixme[21]: Could not find module `fbpcs.private_computation.entity.infra_config`.
 from fbpcs.private_computation.entity.infra_config import PrivateComputationGameType
+
+# pyre-fixme[21]: Could not find module `fbpcs.private_computation.entity.pcs_feature`.
 from fbpcs.private_computation.entity.pcs_feature import PCSFeature
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.stage_flows.private_computation_base_stage_flow`.
 from fbpcs.private_computation.stage_flows.private_computation_base_stage_flow import (
     PrivateComputationBaseStageFlow,
 )
+
+# pyre-fixme[21]: Could not find module `fbpcs.private_computation.stage_flows.privat...
 from fbpcs.private_computation.stage_flows.private_computation_mr_pid_pcf2_lift_stage_flow import (
     PrivateComputationMrPidPCF2LiftStageFlow,
 )
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.stage_flows.private_computation_mr_stage_flow`.
 from fbpcs.private_computation.stage_flows.private_computation_mr_stage_flow import (
     PrivateComputationMRStageFlow,
 )
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.stage_flows.private_computation_pcf2_lift_udp_stage_flow`.
 from fbpcs.private_computation.stage_flows.private_computation_pcf2_lift_udp_stage_flow import (
     PrivateComputationPCF2LiftUDPStageFlow,
 )
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.stage_flows.private_computation_pcf2_stage_flow`.
 from fbpcs.private_computation.stage_flows.private_computation_pcf2_stage_flow import (
     PrivateComputationPCF2StageFlow,
 )
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.stage_flows.private_computation_stage_flow`.
 from fbpcs.private_computation.stage_flows.private_computation_stage_flow import (
     PrivateComputationStageFlow,
 )
@@ -31,15 +51,24 @@
 
 
 def get_stage_flow(
+    # pyre-fixme[11]: Annotation `PrivateComputationGameType` is not defined as a type.
     game_type: PrivateComputationGameType,
+    # pyre-fixme[11]: Annotation `PCSFeature` is not defined as a type.
     pcs_feature_enums: Set[PCSFeature],
+    # pyre-fixme[11]: Annotation `PrivateComputationBaseStageFlow` is not defined as
+    #  a type.
     stage_flow_cls: Optional[Type[PrivateComputationBaseStageFlow]] = None,
 ) -> Type[PrivateComputationBaseStageFlow]:
     selected_stage_flow_cls = unwrap_or_default(
         optional=stage_flow_cls,
         default=(
+            # pyre-fixme[16]: Module `private_computation` has no attribute
+            #  `stage_flows`.
             PrivateComputationPCF2StageFlow
+            # pyre-fixme[16]: Module `entity` has no attribute `infra_config`.
             if game_type is PrivateComputationGameType.ATTRIBUTION
+            # pyre-fixme[16]: Module `private_computation` has no attribute
+            #  `stage_flows`.
             else PrivateComputationStageFlow
         ),
     )
@@ -47,13 +76,21 @@ def get_stage_flow(
     # warning, enabled feature gating will override stage flow, Please contact PSI team to have a similar adoption
     if PCSFeature.PRIVATE_ATTRIBUTION_MR_PID in pcs_feature_enums:
         selected_stage_flow_cls = (
+            # pyre-fixme[16]: Module `private_computation` has no attribute
+            #  `stage_flows`.
             PrivateComputationMRStageFlow
+            # pyre-fixme[16]: Module `entity` has no attribute `infra_config`.
             if game_type is PrivateComputationGameType.ATTRIBUTION
+            # pyre-fixme[16]: Module `private_computation` has no attribute
+            #  `stage_flows`.
             else PrivateComputationMrPidPCF2LiftStageFlow
         )
     if PCSFeature.PRIVATE_LIFT_UNIFIED_DATA_PROCESS in pcs_feature_enums:
         selected_stage_flow_cls = (
+            # pyre-fixme[16]: Module `private_computation` has no attribute
+            #  `stage_flows`.
             PrivateComputationPCF2LiftUDPStageFlow
+            # pyre-fixme[16]: Module `entity` has no attribute `infra_config`.
             if game_type is PrivateComputationGameType.LIFT
             else selected_stage_flow_cls
         )
diff --git a/fbpcs/data_processing/pid_preparer/preparer.py b/fbpcs/data_processing/pid_preparer/preparer.py
index b33b8cf66..abd9b7674 100644
--- a/fbpcs/data_processing/pid_preparer/preparer.py
+++ b/fbpcs/data_processing/pid_preparer/preparer.py
@@ -11,8 +11,13 @@
 import pathlib
 from typing import Optional
 
+# pyre-fixme[21]: Could not find module `fbpcp.entity.container_instance`.
 from fbpcp.entity.container_instance import ContainerInstance
+
+# pyre-fixme[21]: Could not find module `fbpcp.service.onedocker`.
 from fbpcp.service.onedocker import OneDockerService
+
+# pyre-fixme[21]: Could not find module `fbpcp.service.storage`.
 from fbpcp.service.storage import StorageService
 
 
@@ -24,6 +29,7 @@ def prepare(
         output_path: str,
         log_path: Optional[pathlib.Path] = None,
         log_level: int = logging.INFO,
+        # pyre-fixme[11]: Annotation `StorageService` is not defined as a type.
         storage_svc: Optional[StorageService] = None,
     ) -> None:
         pass
@@ -34,10 +40,12 @@ def prepare_on_container(
         input_path: str,
         output_path: str,
         # TODO: Support custom log path
+        # pyre-fixme[11]: Annotation `OneDockerService` is not defined as a type.
         onedocker_svc: OneDockerService,
         binary_version: str,
         tmp_directory: str = "/tmp/",
         wait_for_container: bool = True,
+        # pyre-fixme[11]: Annotation `ContainerInstance` is not defined as a type.
     ) -> ContainerInstance:
         pass
 
diff --git a/fbpcs/data_processing/pid_preparer/union_pid_preparer_cpp.py b/fbpcs/data_processing/pid_preparer/union_pid_preparer_cpp.py
index 0e14b5748..5b2b037a8 100644
--- a/fbpcs/data_processing/pid_preparer/union_pid_preparer_cpp.py
+++ b/fbpcs/data_processing/pid_preparer/union_pid_preparer_cpp.py
@@ -15,14 +15,27 @@
 import tempfile
 from typing import Dict, Optional
 
+# pyre-fixme[21]: Could not find module `fbpcp.entity.container_instance`.
 from fbpcp.entity.container_instance import ContainerInstance, ContainerInstanceStatus
+
+# pyre-fixme[21]: Could not find module `fbpcp.error.pcp`.
 from fbpcp.error.pcp import ThrottlingError
+
+# pyre-fixme[21]: Could not find module `fbpcp.service.onedocker`.
 from fbpcp.service.onedocker import OneDockerService
+
+# pyre-fixme[21]: Could not find module `fbpcp.service.storage`.
 from fbpcp.service.storage import PathType, StorageService
 
+# pyre-fixme[21]: Could not find module `fbpcs.common.service.retry_handler`.
 from fbpcs.common.service.retry_handler import RetryHandler
 from fbpcs.data_processing.pid_preparer.preparer import UnionPIDDataPreparerService
+
+# pyre-fixme[21]: Could not find module `fbpcs.onedocker_binary_names`.
 from fbpcs.onedocker_binary_names import OneDockerBinaryNames
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.service.run_binary_base_service`.
 from fbpcs.private_computation.service.run_binary_base_service import (
     RunBinaryBaseService,
 )
@@ -43,6 +56,7 @@ def prepare(
         output_path: str,
         log_path: Optional[pathlib.Path] = None,
         log_level: int = logging.INFO,
+        # pyre-fixme[11]: Annotation `StorageService` is not defined as a type.
         storage_svc: Optional[StorageService] = None,
     ) -> None:
         if log_path is not None:
@@ -95,6 +109,7 @@ def prepare_on_container(
         self,
         input_path: str,
         output_path: str,
+        # pyre-fixme[11]: Annotation `OneDockerService` is not defined as a type.
         onedocker_svc: OneDockerService,
         binary_version: str,
         max_column_count: int = 1,
@@ -102,6 +117,7 @@ def prepare_on_container(
         container_timeout: Optional[int] = None,
         wait_for_container: bool = True,
         env_vars: Optional[Dict[str, str]] = None,
+        # pyre-fixme[11]: Annotation `ContainerInstance` is not defined as a type.
     ) -> ContainerInstance:
         return asyncio.run(
             self.prepare_on_container_async(
@@ -145,6 +161,7 @@ async def prepare_on_container_async(
 
         current_retry = 0
         status = ContainerInstanceStatus.UNKNOWN
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `onedocker_binary_names`.
         exe = OneDockerBinaryNames.UNION_PID_PREPARER.value
         container = None
         while status is not ContainerInstanceStatus.COMPLETED:
@@ -162,6 +179,7 @@ async def prepare_on_container_async(
                 env_vars=env_vars,
             )
 
+            # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
             with RetryHandler(
                 ThrottlingError, logger=logger, backoff_seconds=30
             ) as retry_handler:
@@ -175,6 +193,8 @@ async def prepare_on_container_async(
             # Busy wait until the container is finished
             if wait_for_container:
                 container = (
+                    # pyre-fixme[16]: Module `fbpcs` has no attribute
+                    #  `private_computation`.
                     await RunBinaryBaseService.wait_for_containers_async(
                         onedocker_svc, [container]
                     )
diff --git a/fbpcs/data_processing/service/id_spine_combiner.py b/fbpcs/data_processing/service/id_spine_combiner.py
index 07fc1f1ab..daebb5c48 100644
--- a/fbpcs/data_processing/service/id_spine_combiner.py
+++ b/fbpcs/data_processing/service/id_spine_combiner.py
@@ -8,10 +8,17 @@
 
 from typing import List, Optional
 
+# pyre-fixme[21]: Could not find module `fbpcp.util.arg_builder`.
 from fbpcp.util.arg_builder import build_cmd_args
 
+# pyre-fixme[21]: Could not find module `fbpcs.private_computation.service.constants`.
 from fbpcs.private_computation.service.constants import DEFAULT_SORT_STRATEGY
+
+# pyre-fixme[21]: Could not find module `fbpcs.private_computation.service.pid_utils`.
 from fbpcs.private_computation.service.pid_utils import get_sharded_filepath
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.service.run_binary_base_service`.
 from fbpcs.private_computation.service.run_binary_base_service import (
     RunBinaryBaseService,
 )
@@ -21,6 +28,7 @@
 DEFAULT_CONTAINER_TIMEOUT_IN_SEC = 10800
 
 
+# pyre-fixme[11]: Annotation `RunBinaryBaseService` is not defined as a type.
 class IdSpineCombinerService(RunBinaryBaseService):
     @staticmethod
     def build_args(
@@ -31,6 +39,7 @@ def build_args(
         tmp_directory: str,
         protocol_type: str,
         max_id_column_cnt: int = 1,
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `private_computation`.
         sort_strategy: str = DEFAULT_SORT_STRATEGY,
         # TODO T106159008: padding_size and run_name are only temporarily optional
         # because Lift does not use them. It should and will be required to use them.
@@ -46,8 +55,11 @@ def build_args(
         # own ThreadPoolExecutor here and instead use async primitives
         cmd_args_list = []
         for shard in range(num_shards):
+            # pyre-fixme[16]: Module `fbpcs` has no attribute `private_computation`.
             next_spine_path = get_sharded_filepath(spine_path, shard)
+            # pyre-fixme[16]: Module `fbpcs` has no attribute `private_computation`.
             next_data_path = get_sharded_filepath(data_path, shard)
+            # pyre-fixme[16]: Module `fbpcs` has no attribute `private_computation`.
             next_output_path = get_sharded_filepath(output_path, shard)
             cmd_args = build_cmd_args(
                 spine_path=next_spine_path,
diff --git a/fbpcs/data_processing/service/pid_run_protocol_binary_service.py b/fbpcs/data_processing/service/pid_run_protocol_binary_service.py
index 942c98ca2..a9898e8d8 100644
--- a/fbpcs/data_processing/service/pid_run_protocol_binary_service.py
+++ b/fbpcs/data_processing/service/pid_run_protocol_binary_service.py
@@ -12,6 +12,9 @@
 from fbpcs.onedocker_binary_names import OneDockerBinaryNames
 
 from fbpcs.pid.entity.pid_instance import PIDProtocol
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.entity.private_computation_instance`.
 from fbpcs.private_computation.entity.private_computation_instance import (
     PrivateComputationRole,
 )
@@ -35,6 +38,7 @@ def build_args(
         output_path: str,
         port: int,
         tls_args: TlsArgs,
+        # pyre-fixme[11]: Annotation `PrivateComputationRole` is not defined as a type.
         pc_role: PrivateComputationRole,
         use_row_numbers: bool = False,
         server_endpoint: Optional[str] = None,
@@ -66,12 +70,18 @@ def build_args(
         if use_row_numbers:
             cmd_ls.append("--use-row-numbers")
 
+        # pyre-fixme[16]: Module `entity` has no attribute
+        #  `private_computation_instance`.
         if tls_args.ca_cert_path and pc_role is PrivateComputationRole.PARTNER:
             cmd_ls.append(f"--tls-ca {tls_args.ca_cert_path}")
 
+        # pyre-fixme[16]: Module `entity` has no attribute
+        #  `private_computation_instance`.
         if tls_args.server_cert_path and pc_role is PrivateComputationRole.PUBLISHER:
             cmd_ls.append(f"--tls-cert {tls_args.server_cert_path}")
 
+        # pyre-fixme[16]: Module `entity` has no attribute
+        #  `private_computation_instance`.
         if tls_args.private_key_path and pc_role is PrivateComputationRole.PUBLISHER:
             cmd_ls.append(f"--tls-key {tls_args.private_key_path}")
 
@@ -82,10 +92,14 @@ def build_args(
 
     @staticmethod
     def get_binary_name(protocol: PIDProtocol, pc_role: PrivateComputationRole) -> str:
+        # pyre-fixme[16]: Module `entity` has no attribute
+        #  `private_computation_instance`.
         if pc_role is PrivateComputationRole.PUBLISHER:
             binary_name = OneDockerBinaryNames.PID_SERVER.value
             if protocol is PIDProtocol.UNION_PID_MULTIKEY:
                 binary_name = OneDockerBinaryNames.PID_MULTI_KEY_SERVER.value
+        # pyre-fixme[16]: Module `entity` has no attribute
+        #  `private_computation_instance`.
         elif pc_role is PrivateComputationRole.PARTNER:
             binary_name = OneDockerBinaryNames.PID_CLIENT.value
             if protocol is PIDProtocol.UNION_PID_MULTIKEY:
diff --git a/fbpcs/infra/certificate/pc_instance_ca_certificate_provider.py b/fbpcs/infra/certificate/pc_instance_ca_certificate_provider.py
index cb16f35f8..11afe91ba 100644
--- a/fbpcs/infra/certificate/pc_instance_ca_certificate_provider.py
+++ b/fbpcs/infra/certificate/pc_instance_ca_certificate_provider.py
@@ -9,6 +9,9 @@
 from typing import Optional
 
 from fbpcs.infra.certificate.certificate_provider import CertificateProvider
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.entity.private_computation_instance`.
 from fbpcs.private_computation.entity.private_computation_instance import (
     PrivateComputationInstance,
 )
@@ -20,7 +23,9 @@ class PCInstanceCaCertificateProvider(CertificateProvider):
     from PC instance repo.
     """
 
+    # pyre-fixme[11]: Annotation `PrivateComputationInstance` is not defined as a type.
     def __init__(self, pc_instance: PrivateComputationInstance) -> None:
+        # pyre-fixme[4]: Attribute must be annotated.
         self.pc_instance = pc_instance
 
     def get_certificate(self) -> Optional[str]:
diff --git a/fbpcs/infra/certificate/pc_instance_server_certificate.py b/fbpcs/infra/certificate/pc_instance_server_certificate.py
index f525a968a..400a9efc6 100644
--- a/fbpcs/infra/certificate/pc_instance_server_certificate.py
+++ b/fbpcs/infra/certificate/pc_instance_server_certificate.py
@@ -9,6 +9,9 @@
 from typing import Optional
 
 from fbpcs.infra.certificate.certificate_provider import CertificateProvider
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.entity.private_computation_instance`.
 from fbpcs.private_computation.entity.private_computation_instance import (
     PrivateComputationInstance,
 )
@@ -20,7 +23,9 @@ class PCInstanceServerCertificateProvider(CertificateProvider):
     from PC instance repo.
     """
 
+    # pyre-fixme[11]: Annotation `PrivateComputationInstance` is not defined as a type.
     def __init__(self, pc_instance: PrivateComputationInstance) -> None:
+        # pyre-fixme[4]: Attribute must be annotated.
         self.pc_instance = pc_instance
 
     def get_certificate(self) -> Optional[str]:
diff --git a/fbpcs/pc_pre_validation/tests/pc_pre_validation_cli_test.py b/fbpcs/pc_pre_validation/tests/pc_pre_validation_cli_test.py
index ca4410568..e6bae8b14 100644
--- a/fbpcs/pc_pre_validation/tests/pc_pre_validation_cli_test.py
+++ b/fbpcs/pc_pre_validation/tests/pc_pre_validation_cli_test.py
@@ -91,6 +91,8 @@ def test_parsing_all_args(
         expected_access_key_id = "access_key_id2"
         expected_access_key_data = "access_key_data3"
         expected_binary_version = "binary_version"
+        # pyre-fixme[9]: expected_pc_computation_role has type
+        #  `PrivateComputationRole`; used as `str`.
         expected_pc_computation_role: PrivateComputationRole = (
             PrivateComputationRole.PARTNER.name
         )
diff --git a/fbpcs/pl_coordinator/token_validator.py b/fbpcs/pl_coordinator/token_validator.py
index 0f3a20232..9673959e7 100644
--- a/fbpcs/pl_coordinator/token_validator.py
+++ b/fbpcs/pl_coordinator/token_validator.py
@@ -77,6 +77,9 @@ def validate_rule(self, rule: TokenValidationRule) -> None:
                         instance_id="NO_INSTANCE",
                         checkpoint_name="FAIL_FAST_VALIDATION",
                         status=CheckpointStatus.FAILED,
+                        # pyre-fixme[6]: For 5th argument expected
+                        #  `Optional[Dict[str, str]]` but got `Dict[str,
+                        #  Union[TokenValidationRuleType, str]]`.
                         checkpoint_data={
                             "rule_name": rule.name,
                             "rule_type": rule.rule_type,
diff --git a/fbpcs/post_processing_handler/post_processing_handler.py b/fbpcs/post_processing_handler/post_processing_handler.py
index c3ccf9944..e7723657c 100644
--- a/fbpcs/post_processing_handler/post_processing_handler.py
+++ b/fbpcs/post_processing_handler/post_processing_handler.py
@@ -11,6 +11,8 @@
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
+    # pyre-fixme[21]: Could not find module
+    #  `fbpcs.private_computation.entity.private_computation_instance`.
     from fbpcs.private_computation.entity.private_computation_instance import (
         PrivateComputationInstance,
     )
@@ -29,6 +31,8 @@ class PostProcessingHandler(abc.ABC):
     async def run(
         self,
         storage_svc: StorageService,
+        # pyre-fixme[11]: Annotation `PrivateComputationInstance` is not defined as
+        #  a type.
         private_computation_instance: "PrivateComputationInstance",
     ) -> None:
         raise NotImplementedError
diff --git a/fbpcs/post_processing_handler/tests/dummy_handler.py b/fbpcs/post_processing_handler/tests/dummy_handler.py
index de0a24bb3..4c9538bd3 100644
--- a/fbpcs/post_processing_handler/tests/dummy_handler.py
+++ b/fbpcs/post_processing_handler/tests/dummy_handler.py
@@ -15,6 +15,8 @@
 from fbpcs.post_processing_handler.post_processing_handler import PostProcessingHandler
 
 if TYPE_CHECKING:
+    # pyre-fixme[21]: Could not find module
+    #  `fbpcs.private_computation.entity.private_computation_instance`.
     from fbpcs.private_computation.entity.private_computation_instance import (
         PrivateComputationInstance,
     )
@@ -38,6 +40,8 @@ def __init__(
     async def run(
         self,
         storage_svc: StorageService,
+        # pyre-fixme[11]: Annotation `PrivateComputationInstance` is not defined as
+        #  a type.
         private_computation_instance: "PrivateComputationInstance",
     ) -> None:
         if random.random() >= self.probability_of_failure:
diff --git a/fbpcs/private_computation/entity/pid_mr_config.py b/fbpcs/private_computation/entity/pid_mr_config.py
index 846597f6a..6b1f56613 100644
--- a/fbpcs/private_computation/entity/pid_mr_config.py
+++ b/fbpcs/private_computation/entity/pid_mr_config.py
@@ -10,6 +10,7 @@
 from dataclasses import dataclass
 from enum import Enum
 
+# pyre-fixme[21]: Could not find module `dataclasses_json`.
 from dataclasses_json import dataclass_json, DataClassJsonMixin
 
 
@@ -26,6 +27,7 @@ class PidWorkflowConfigs:
 
 
 @dataclass
+# pyre-fixme[11]: Annotation `DataClassJsonMixin` is not defined as a type.
 class PidMrConfig(DataClassJsonMixin):
     runConfigs: PidRunConfigs
     workflowConfigs: PidWorkflowConfigs
diff --git a/fbpcs/private_computation/service/constants.py b/fbpcs/private_computation/service/constants.py
index 28ef811f7..0f3a9162f 100644
--- a/fbpcs/private_computation/service/constants.py
+++ b/fbpcs/private_computation/service/constants.py
@@ -8,8 +8,10 @@
 
 import typing
 
+# pyre-fixme[21]: Could not find module `fbpcs.pid.entity.pid_instance`.
 from fbpcs.pid.entity.pid_instance import PIDProtocol
 
+# pyre-fixme[21]: Could not find module `fbpcs.private_computation.entity.infra_config`.
 from fbpcs.private_computation.entity.infra_config import PrivateComputationGameType
 
 """
@@ -32,14 +34,21 @@
 
 DEFAULT_K_ANONYMITY_THRESHOLD_PL = 100
 DEFAULT_K_ANONYMITY_THRESHOLD_PA = 0
+# pyre-fixme[11]: Annotation `PIDProtocol` is not defined as a type.
+# pyre-fixme[16]: Module `fbpcs` has no attribute `pid`.
 DEFAULT_PID_PROTOCOL: PIDProtocol = PIDProtocol.UNION_PID
 DEFAULT_HMAC_KEY: str = ""
 DEFAULT_CONCURRENCY = 4
 ATTRIBUTION_TEST_CONCURRENCY = 1
+# pyre-fixme[11]: Annotation `PrivateComputationGameType` is not defined as a type.
 DEFAULT_PADDING_SIZE: typing.Dict[PrivateComputationGameType, typing.Optional[int]] = {
+    # pyre-fixme[16]: Module `entity` has no attribute `infra_config`.
     PrivateComputationGameType.LIFT: 25,
+    # pyre-fixme[16]: Module `entity` has no attribute `infra_config`.
     PrivateComputationGameType.ATTRIBUTION: 4,
+    # pyre-fixme[16]: Module `entity` has no attribute `infra_config`.
     PrivateComputationGameType.PRIVATE_ID_DFCA: None,
+    # pyre-fixme[16]: Module `entity` has no attribute `infra_config`.
     PrivateComputationGameType.ANONYMIZER: None,
 }
 DEFAULT_LOG_COST_TO_S3 = True
diff --git a/fbpcs/private_computation/service/mpc/mpc.py b/fbpcs/private_computation/service/mpc/mpc.py
index 16e70bffc..f7ce09db6 100644
--- a/fbpcs/private_computation/service/mpc/mpc.py
+++ b/fbpcs/private_computation/service/mpc/mpc.py
@@ -9,13 +9,22 @@
 import logging
 from typing import Any, Dict, List, Optional, Tuple
 
+# pyre-fixme[21]: Could not find module `fbpcp.service.container`.
 from fbpcp.service.container import ContainerService
+
+# pyre-fixme[21]: Could not find module `fbpcp.service.onedocker`.
 from fbpcp.service.onedocker import OneDockerService
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.entity.private_computation_instance`.
 from fbpcs.private_computation.entity.private_computation_instance import (
     PrivateComputationRole,
 )
 from fbpcs.private_computation.service.mpc.entity.mpc_instance import MPCParty
 from fbpcs.private_computation.service.mpc.mpc_game import MPCGameService
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.service.run_binary_base_service`.
 from fbpcs.private_computation.service.run_binary_base_service import (
     RunBinaryBaseService,
 )
@@ -23,6 +32,7 @@
 DEFAULT_BINARY_VERSION = "latest"
 
 
+# pyre-fixme[11]: Annotation `RunBinaryBaseService` is not defined as a type.
 class MPCService(RunBinaryBaseService):
     """MPCService is responsible for distributing a larger MPC game to multiple
     MPC workers
@@ -30,6 +40,7 @@ class MPCService(RunBinaryBaseService):
 
     def __init__(
         self,
+        # pyre-fixme[11]: Annotation `ContainerService` is not defined as a type.
         container_svc: ContainerService,
         task_definition: str,
         mpc_game_svc: MPCGameService,
@@ -45,11 +56,13 @@ def __init__(
                 f"Dependency is missing. container_svc={container_svc}, mpc_game_svc={mpc_game_svc}"
             )
 
+        # pyre-fixme[4]: Attribute must be annotated.
         self.container_svc = container_svc
         self.task_definition = task_definition
         self.mpc_game_svc: MPCGameService = mpc_game_svc
         self.logger: logging.Logger = logging.getLogger(__name__)
 
+        # pyre-fixme[4]: Attribute must be annotated.
         self.onedocker_svc = OneDockerService(self.container_svc, self.task_definition)
 
     """
@@ -138,6 +151,7 @@ def convert_cmd_args_list(
 
 
 def map_private_computation_role_to_mpc_party(
+    # pyre-fixme[11]: Annotation `PrivateComputationRole` is not defined as a type.
     private_computation_role: PrivateComputationRole,
 ) -> MPCParty:
     """Convert PrivateComputationRole to MPCParty
@@ -151,8 +165,10 @@ def map_private_computation_role_to_mpc_party(
     Exceptions:
         ValueError: raised when there is no MPCParty associated with private_computation_role
     """
+    # pyre-fixme[16]: Module `private_computation` has no attribute `entity`.
     if private_computation_role is PrivateComputationRole.PUBLISHER:
         return MPCParty.SERVER
+    # pyre-fixme[16]: Module `private_computation` has no attribute `entity`.
     elif private_computation_role is PrivateComputationRole.PARTNER:
         return MPCParty.CLIENT
     else:
diff --git a/fbpcs/private_computation/service/mpc/mpc_game.py b/fbpcs/private_computation/service/mpc/mpc_game.py
index 1f8145b3c..d0ed4883c 100644
--- a/fbpcs/private_computation/service/mpc/mpc_game.py
+++ b/fbpcs/private_computation/service/mpc/mpc_game.py
@@ -9,6 +9,7 @@
 import logging
 from typing import Any, Dict, Optional, Tuple
 
+# pyre-fixme[21]: Could not find module `fbpcp.util.arg_builder`.
 from fbpcp.util.arg_builder import build_cmd_args
 
 from fbpcs.private_computation.service.mpc.entity.mpc_game_config import MPCGameConfig
diff --git a/fbpcs/private_computation/service/pre_validate_service.py b/fbpcs/private_computation/service/pre_validate_service.py
index e13231674..d1dff0995 100644
--- a/fbpcs/private_computation/service/pre_validate_service.py
+++ b/fbpcs/private_computation/service/pre_validate_service.py
@@ -10,23 +10,48 @@
 import logging
 from typing import Any, Dict, List
 
+# pyre-fixme[21]: Could not find module `fbpcp.entity.container_instance`.
 from fbpcp.entity.container_instance import ContainerInstanceStatus
+
+# pyre-fixme[21]: Could not find module `fbpcp.entity.container_type`.
 from fbpcp.entity.container_type import ContainerType
+
+# pyre-fixme[21]: Could not find module `fbpcs.onedocker_binary_names`.
 from fbpcs.onedocker_binary_names import OneDockerBinaryNames
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.entity.private_computation_instance`.
 from fbpcs.private_computation.entity.private_computation_instance import (
     PrivateComputationRole,
 )
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.service.pc_pre_validation_stage_service`.
 from fbpcs.private_computation.service.pc_pre_validation_stage_service import (
     PRE_VALIDATION_CHECKS_TIMEOUT,
 )
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.service.pre_validation_util`.
 from fbpcs.private_computation.service.pre_validation_util import get_cmd_args
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.service.private_computation`.
 from fbpcs.private_computation.service.private_computation import (
     PrivateComputationService,
 )
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation.service.run_binary_base_service`.
 from fbpcs.private_computation.service.run_binary_base_service import (
     RunBinaryBaseService,
 )
+
+# pyre-fixme[21]: Could not find module `fbpcs.private_computation.service.utils`.
 from fbpcs.private_computation.service.utils import generate_env_vars_dict
+
+# pyre-fixme[21]: Could not find module
+#  `fbpcs.private_computation_cli.private_computation_service_wrapper`.
 from fbpcs.private_computation_cli.private_computation_service_wrapper import (
     build_private_computation_service,
 )
@@ -35,14 +60,18 @@
 class PreValidateService:
     @staticmethod
     async def run_pre_validate_async(
+        # pyre-fixme[11]: Annotation `PrivateComputationService` is not defined as a
+        #  type.
         pc_service: PrivateComputationService,
         input_paths: List[str],
         logger: logging.Logger,
     ) -> None:
         region = pc_service.pc_validator_config.region
         onedocker_svc = pc_service.onedocker_svc
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `onedocker_binary_names`.
         binary_name = OneDockerBinaryNames.PC_PRE_VALIDATION.value
         binary_config = pc_service.onedocker_binary_config_map[binary_name]
+        # pyre-fixme[16]: Module `service` has no attribute `utils`.
         env_vars = generate_env_vars_dict(repository_path=binary_config.repository_path)
 
         """
@@ -50,6 +79,7 @@ async def run_pre_validate_async(
         Since this service runs on partner PCE, we are hardcoding PrivateComputationRole to PARTNER in the code below.
         """
         cmd_args = [
+            # pyre-fixme[16]: Module `service` has no attribute `pre_validation_util`.
             get_cmd_args(
                 input_path=input_path,
                 region=region,
@@ -57,6 +87,8 @@ async def run_pre_validate_async(
                 pre_validation_file_stream_flag=True,
                 publisher_pc_pre_validation_flag=True,
                 partner_pc_pre_validation_flag=True,
+                # pyre-fixme[16]: Module `entity` has no attribute
+                #  `private_computation_instance`.
                 private_computation_role=PrivateComputationRole.PARTNER,
                 input_path_start_ts=None,
                 input_path_end_ts=None,
@@ -64,17 +96,21 @@ async def run_pre_validate_async(
             for input_path in input_paths
         ]
 
+        # pyre-fixme[16]: Module `service` has no attribute `run_binary_base_service`.
         container_instances = await RunBinaryBaseService().start_containers(
             cmd_args,
             onedocker_svc,
             binary_config.binary_version,
             binary_name,
+            # pyre-fixme[16]: Module `service` has no attribute
+            #  `pc_pre_validation_stage_service`.
             timeout=PRE_VALIDATION_CHECKS_TIMEOUT,
             env_vars=env_vars,
             container_type=ContainerType.LARGE,
         )
         logger.info("Started container instances")
 
+        # pyre-fixme[16]: Module `service` has no attribute `run_binary_base_service`.
         completed_containers = await RunBinaryBaseService().wait_for_containers_async(
             onedocker_svc,
             container_instances,
@@ -119,6 +155,7 @@ def pre_validate(
         input_paths: List[str],
         logger: logging.Logger,
     ) -> None:
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `private_computation_cli`.
         pc_service = build_private_computation_service(
             config["private_computation"],
             config["mpc"],
diff --git a/fbpcs/private_computation/service/run_binary_base_service.py b/fbpcs/private_computation/service/run_binary_base_service.py
index 169d8df36..479a88c01 100644
--- a/fbpcs/private_computation/service/run_binary_base_service.py
+++ b/fbpcs/private_computation/service/run_binary_base_service.py
@@ -10,13 +10,25 @@
 import logging
 from typing import Dict, List, Optional
 
+# pyre-fixme[21]: Could not find module `fbpcp.entity.certificate_request`.
 from fbpcp.entity.certificate_request import CertificateRequest
 
+# pyre-fixme[21]: Could not find module `fbpcp.entity.container_instance`.
 from fbpcp.entity.container_instance import ContainerInstance, ContainerInstanceStatus
+
+# pyre-fixme[21]: Could not find module `fbpcp.entity.container_permission`.
 from fbpcp.entity.container_permission import ContainerPermissionConfig
+
+# pyre-fixme[21]: Could not find module `fbpcp.entity.container_type`.
 from fbpcp.entity.container_type import ContainerType
+
+# pyre-fixme[21]: Could not find module `fbpcp.error.pcp`.
 from fbpcp.error.pcp import ThrottlingError
+
+# pyre-fixme[21]: Could not find module `fbpcp.service.onedocker`.
 from fbpcp.service.onedocker import OneDockerService
+
+# pyre-fixme[21]: Could not find module `fbpcs.common.service.retry_handler`.
 from fbpcs.common.service.retry_handler import BackoffType, RetryHandler
 from fbpcs.private_computation.service.constants import DEFAULT_CONTAINER_TIMEOUT_IN_SEC
 
@@ -27,6 +39,7 @@ class RunBinaryBaseService:
     async def start_containers(
         self,
         cmd_args_list: List[str],
+        # pyre-fixme[11]: Annotation `OneDockerService` is not defined as a type.
         onedocker_svc: OneDockerService,
         binary_version: str,
         binary_name: str,
@@ -34,11 +47,16 @@ async def start_containers(
         wait_for_containers_to_finish: bool = False,
         env_vars: Optional[Dict[str, str]] = None,
         wait_for_containers_to_start_up: bool = True,
+        # pyre-fixme[11]: Annotation `ContainerInstance` is not defined as a type.
         existing_containers: Optional[List[ContainerInstance]] = None,
+        # pyre-fixme[11]: Annotation `ContainerType` is not defined as a type.
         container_type: Optional[ContainerType] = None,
+        # pyre-fixme[11]: Annotation `CertificateRequest` is not defined as a type.
         certificate_request: Optional[CertificateRequest] = None,
         env_vars_list: Optional[List[Dict[str, str]]] = None,
         opa_workflow_path: Optional[str] = None,
+        # pyre-fixme[11]: Annotation `ContainerPermissionConfig` is not defined as a
+        #  type.
         permission: Optional[ContainerPermissionConfig] = None,
     ) -> List[ContainerInstance]:
         logger = logging.getLogger(__name__)
@@ -82,6 +100,7 @@ async def start_containers(
             logger.info("Skipped container warm up")
             return pending_containers
 
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
         with RetryHandler(
             ThrottlingError, logger=logger, backoff_seconds=30
         ) as retry_handler:
@@ -150,8 +169,12 @@ async def wait_for_containers_async(
         container_ids = [container.instance_id for container in containers]
         finished_containers = []
 
+        # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
         with RetryHandler(
-            ThrottlingError, backoff_type=BackoffType.LINEAR
+            # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
+            ThrottlingError,
+            # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
+            backoff_type=BackoffType.LINEAR,
         ) as retry_handler:
             updated_containers = retry_handler.execute_sync(
                 onedocker_svc.get_containers,
@@ -164,8 +187,12 @@ async def wait_for_containers_async(
         )
         while pending_container_ids:
             await asyncio.sleep(poll)
+            # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
             with RetryHandler(
-                ThrottlingError, backoff_type=BackoffType.LINEAR
+                # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
+                ThrottlingError,
+                # pyre-fixme[16]: Module `fbpcs` has no attribute `common`.
+                backoff_type=BackoffType.LINEAR,
             ) as retry_handler:
                 updated_containers = retry_handler.execute_sync(
                     onedocker_svc.get_containers,
diff --git a/fbpcs/service/workflow_sfn_fb.py b/fbpcs/service/workflow_sfn_fb.py
index 8775bdeed..573a6fb0d 100644
--- a/fbpcs/service/workflow_sfn_fb.py
+++ b/fbpcs/service/workflow_sfn_fb.py
@@ -10,10 +10,12 @@
 
 import botocore
 
+# pyre-fixme[21]: Could not find module `fbpcp.intern.gateway.aws_fb`.
 from fbpcp.intern.gateway.aws_fb import FBAWSGateway
 from fbpcs.service.workflow_sfn import SfnWorkflowService
 
 
+# pyre-fixme[11]: Annotation `FBAWSGateway` is not defined as a type.
 class FBSfnWorkflowService(FBAWSGateway, SfnWorkflowService):
     def __init__(
         self,
@@ -21,7 +23,9 @@ def __init__(
         account: str,
         role: Optional[str] = None,
     ) -> None:
+        # pyre-fixme[28]: Unexpected keyword argument `account`.
         super().__init__(account=account, role=role, region=region)
+        # pyre-fixme[16]: `FBSfnWorkflowService` has no attribute `session_gen`.
         self.client: botocore.client.BaseClient = self.session_gen.get_client(
             "stepfunctions"
         )