diff --git a/.github/workflows/proto.yml b/.github/workflows/proto.yml
new file mode 100644
index 000000000..2c82ff47b
--- /dev/null
+++ b/.github/workflows/proto.yml
@@ -0,0 +1,33 @@
+name: Protobuf
+# Runs buf (https://buf.build/) checks and pushes to BSR
+# PR: runs lint, format, and breaking change detection
+# Push to main/tags: pushes to BSR
+# Delete branch/tag: archives corresponding BSR labels
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - 'v*'
+  pull_request:
+    paths:
+      - "proto/**"
+      - ".github/workflows/proto.yml"
+  delete:
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  buf-build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v6
+      - uses: bufbuild/buf-action@v1
+        with:
+          input: proto
+          token: ${{ secrets.BUF_TOKEN }}
+          # breaking defaults to PR-only; not set explicitly to avoid running on push events
diff --git a/proto/buf.yaml b/proto/buf.yaml
index 9f632374e..0405cff6b 100644
--- a/proto/buf.yaml
+++ b/proto/buf.yaml
@@ -13,7 +13,7 @@ breaking:
     - FILE
 lint:
   use:
-    - DEFAULT
+    - STANDARD
     - COMMENTS
     - FILE_LOWER_SNAKE_CASE
   except:
@@ -24,3 +24,7 @@ lint:
     - RPC_REQUEST_STANDARD_NAME
     - ENUM_VALUE_PREFIX
     - ENUM_ZERO_VALUE_SUFFIX
+    # excluded to avoid breaking changes on existing fields and RPCs
+    - FIELD_LOWER_SNAKE_CASE
+    - RPC_REQUEST_RESPONSE_UNIQUE
+    - RPC_RESPONSE_STANDARD_NAME
diff --git a/proto/ibc/applications/nft_transfer/v1/packet.proto b/proto/ibc/applications/nft_transfer/v1/packet.proto
index 9db31fa88..f1c0731e2 100644
--- a/proto/ibc/applications/nft_transfer/v1/packet.proto
+++ b/proto/ibc/applications/nft_transfer/v1/packet.proto
@@ -2,8 +2,6 @@ syntax = "proto3";
 
 package ibc.applications.nft_transfer.v1;
 
-import "gogoproto/gogo.proto";
-
 option go_package = "github.com/initia-labs/initia/x/ibc/nft-transfer/types";
 
 // NonFungibleTokenPacketData defines a struct for the packet payload
diff --git a/proto/initia/abcipp/mempool/v1/query.proto b/proto/initia/abcipp/mempool/v1/query.proto
index 97210d1fd..2b3478ef8 100644
--- a/proto/initia/abcipp/mempool/v1/query.proto
+++ b/proto/initia/abcipp/mempool/v1/query.proto
@@ -1,26 +1,21 @@
 syntax = "proto3";
 package initia.abcipp.mempool.v1;
 
-option go_package = "github.com/initia-labs/initia/abcipp/types";
-
 import "google/api/annotations.proto";
 
+option go_package = "github.com/initia-labs/initia/abcipp/types";
 
 // Query provides defines the gRPC querier service
 service Query {
-    // QueryTxDistribution returns the distribution of transactions in the mempool.
-    rpc QueryTxDistribution(QueryTxDistributionRequest) returns (QueryTxDistributionResponse) {
-        option (google.api.http) = {
-            get: "/initia/abcipp/mempool/v1/distribution"
-        };
-    }
-
-    // QueryTxHash checks if a transaction is in the mempool.
-    rpc QueryTxHash(QueryTxHashRequest) returns (QueryTxHashResponse) {
-        option (google.api.http) = {
-            get: "/initia/abcipp/mempool/v1/{sender}/{sequence}"
-        };
-    }
+  // QueryTxDistribution returns the distribution of transactions in the mempool.
+  rpc QueryTxDistribution(QueryTxDistributionRequest) returns (QueryTxDistributionResponse) {
+    option (google.api.http) = {get: "/initia/abcipp/mempool/v1/distribution"};
+  }
+
+  // QueryTxHash checks if a transaction is in the mempool.
+  rpc QueryTxHash(QueryTxHashRequest) returns (QueryTxHashResponse) {
+    option (google.api.http) = {get: "/initia/abcipp/mempool/v1/{sender}/{sequence}"};
+  }
 }
 
 // QueryTxDistributionRequest is the request type for the Query.QueryTxDistribution
@@ -30,19 +25,19 @@ message QueryTxDistributionRequest {}
 // QueryTxDistributionResponse is the response type for the Query.QueryTxDistribution
 // RPC method.
 message QueryTxDistributionResponse {
-    // Distribution is a map of lane to the number of transactions in the mempool for that lane.
-    map<string, uint64> distribution = 1;
+  // Distribution is a map of lane to the number of transactions in the mempool for that lane.
+  map<string, uint64> distribution = 1;
 }
 
 // QueryTxHashRequest is the request type for the Query.QueryTxHash
 // RPC method.
 message QueryTxHashRequest {
-    string sender = 1;
-    string sequence = 2;
+  string sender = 1;
+  string sequence = 2;
 }
 
 // QueryTxHashResponse is the response type for the Query.QueryTxHash
 // RPC method.
 message QueryTxHashResponse {
-    string txHash = 1;
+  string txHash = 1;
 }
diff --git a/proto/initia/dynamicfee/v1/query.proto b/proto/initia/dynamicfee/v1/query.proto
index 35833e64e..2b59dca34 100644
--- a/proto/initia/dynamicfee/v1/query.proto
+++ b/proto/initia/dynamicfee/v1/query.proto
@@ -1,8 +1,6 @@
 syntax = "proto3";
 package initia.dynamicfee.v1;
 
-import "amino/amino.proto";
-import "cosmos/base/query/v1beta1/pagination.proto";
 import "gogoproto/gogo.proto";
 import "google/api/annotations.proto";
 import "initia/dynamicfee/v1/types.proto";
diff --git a/proto/initia/dynamicfee/v1/types.proto b/proto/initia/dynamicfee/v1/types.proto
index 40387017f..147ce32a9 100644
--- a/proto/initia/dynamicfee/v1/types.proto
+++ b/proto/initia/dynamicfee/v1/types.proto
@@ -9,6 +9,7 @@ option go_package = "github.com/initia-labs/initia/x/dynamic-fee/types";
 option (gogoproto.equal_all) = true;
 option (gogoproto.goproto_getters_all) = false;
 
+// Params defines the parameters for the dynamicfee module.
 message Params {
   string base_gas_price = 1 [
     (gogoproto.moretags) = "yaml:\"base_gas_price\"",
diff --git a/proto/initia/reward/v1/tx.proto b/proto/initia/reward/v1/tx.proto
index a824c5a84..4fa06d371 100644
--- a/proto/initia/reward/v1/tx.proto
+++ b/proto/initia/reward/v1/tx.proto
@@ -2,8 +2,8 @@ syntax = "proto3";
 package initia.reward.v1;
 
 import "amino/amino.proto";
-import "cosmos/msg/v1/msg.proto";
 import "cosmos/base/v1beta1/coin.proto";
+import "cosmos/msg/v1/msg.proto";
 import "cosmos_proto/cosmos.proto";
 import "gogoproto/gogo.proto";
 import "initia/reward/v1/types.proto";