Add mockery workflow with porcelain check.

.github/workflows/codegen.yml

@@ -0,0 +1,30 @@
+# All code generation should be run prior to pull request. Running it again should not produce a diff.
+name: "Codegen Verifier"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 'ccip-develop'
+
+jobs:
+  codegen-verifier:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        go-version: ['1.21']
+    defaults:
+      run:
+        working-directory: .
+    steps:
+      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+      - name: Setup Go ${{ matrix.go-version }}
+        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Display Go version
+        run: go version
+      - name: Generate mocks
+        run: go generate ./...
+      - name: ensure no changes
+        run: [ -z git status --porcelain=v1 2>/dev/null ] || echo "Modified files detected"; exit 1 

execute/types/token_data_reader.go

@@ -9,7 +9,12 @@ import (
 // TokenDataReader is an interface for reading extra token data from an async process.
 // TODO: Build a token data reading process.
 //
-//go:generate mockery --quiet --name TokenDataReader --output ../../internal/mocks --case=underscore
+//go:generate mockery --name TokenDataReader --output ../../internal/mocks --case=underscore
 type TokenDataReader interface {
 	ReadTokenData(ctx context.Context, srcChain cciptypes.ChainSelector, num cciptypes.SeqNum) ([][]byte, error)
 }
+
+//go:generate mockery --name TestInterface --output ../../internal/mocks --case=underscore
+type TestInterface interface {
+	True() bool
+}