diff --git a/internal/stacks/stackconfig/component.go b/internal/stacks/stackconfig/component.go
index c2c1208a68..d750a38ab2 100644
--- a/internal/stacks/stackconfig/component.go
+++ b/internal/stacks/stackconfig/component.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/config.go b/internal/stacks/stackconfig/config.go
index 36ff55ec9d..f6ecc5acfe 100644
--- a/internal/stacks/stackconfig/config.go
+++ b/internal/stacks/stackconfig/config.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/config_test.go b/internal/stacks/stackconfig/config_test.go
index cf48dbf53f..7fc0f69449 100644
--- a/internal/stacks/stackconfig/config_test.go
+++ b/internal/stacks/stackconfig/config_test.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/declarations.go b/internal/stacks/stackconfig/declarations.go
index 9056185e4a..f0222618cf 100644
--- a/internal/stacks/stackconfig/declarations.go
+++ b/internal/stacks/stackconfig/declarations.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/diagnostics.go b/internal/stacks/stackconfig/diagnostics.go
index 2cf2e7618c..a2dca8bcf5 100644
--- a/internal/stacks/stackconfig/diagnostics.go
+++ b/internal/stacks/stackconfig/diagnostics.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/doc.go b/internal/stacks/stackconfig/doc.go
index 4c07ef6c8f..6f47b37b93 100644
--- a/internal/stacks/stackconfig/doc.go
+++ b/internal/stacks/stackconfig/doc.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 // Package stackconfig deals with decoding and some static validation of the
 // Terraform Stack language, which uses files with the suffixes .tfstack.hcl
 // and .tfstack.json to describe a set of components to be planned and applied
diff --git a/internal/stacks/stackconfig/embedded_stack.go b/internal/stacks/stackconfig/embedded_stack.go
index 9bc32b296b..331872879e 100644
--- a/internal/stacks/stackconfig/embedded_stack.go
+++ b/internal/stacks/stackconfig/embedded_stack.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/file.go b/internal/stacks/stackconfig/file.go
index deca4c0b50..e3e1d6f337 100644
--- a/internal/stacks/stackconfig/file.go
+++ b/internal/stacks/stackconfig/file.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/input_variable.go b/internal/stacks/stackconfig/input_variable.go
index 0f18b2625b..75eea00ad7 100644
--- a/internal/stacks/stackconfig/input_variable.go
+++ b/internal/stacks/stackconfig/input_variable.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/local_value.go b/internal/stacks/stackconfig/local_value.go
index c9fc8301e8..4d17bb9987 100644
--- a/internal/stacks/stackconfig/local_value.go
+++ b/internal/stacks/stackconfig/local_value.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/output_value.go b/internal/stacks/stackconfig/output_value.go
index 2cbec5ef39..46b26ee2f7 100644
--- a/internal/stacks/stackconfig/output_value.go
+++ b/internal/stacks/stackconfig/output_value.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/provider_config.go b/internal/stacks/stackconfig/provider_config.go
index 633a7ac59b..d35d23bde0 100644
--- a/internal/stacks/stackconfig/provider_config.go
+++ b/internal/stacks/stackconfig/provider_config.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/provider_requirements.go b/internal/stacks/stackconfig/provider_requirements.go
index 623c3729b1..a96af22505 100644
--- a/internal/stacks/stackconfig/provider_requirements.go
+++ b/internal/stacks/stackconfig/provider_requirements.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/stack.go b/internal/stacks/stackconfig/stack.go
index b6154475d9..d0a5065733 100644
--- a/internal/stacks/stackconfig/stack.go
+++ b/internal/stacks/stackconfig/stack.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfig
 
 import (
diff --git a/internal/stacks/stackconfig/stackconfigtypes/provider_config.go b/internal/stacks/stackconfig/stackconfigtypes/provider_config.go
index 99ec212ef9..2f62b75f20 100644
--- a/internal/stacks/stackconfig/stackconfigtypes/provider_config.go
+++ b/internal/stacks/stackconfig/stackconfigtypes/provider_config.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package stackconfigtypes
 
 import (
diff --git a/internal/stacks/stackconfig/typeexpr/type_info.go b/internal/stacks/stackconfig/typeexpr/type_info.go
index 80c9a7bdbe..0942801694 100644
--- a/internal/stacks/stackconfig/typeexpr/type_info.go
+++ b/internal/stacks/stackconfig/typeexpr/type_info.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package typeexpr
 
 import (
diff --git a/internal/stacks/stackconfig/typeexpr/typeexpr.go b/internal/stacks/stackconfig/typeexpr/typeexpr.go
index b1c9a8ac51..d78edbb016 100644
--- a/internal/stacks/stackconfig/typeexpr/typeexpr.go
+++ b/internal/stacks/stackconfig/typeexpr/typeexpr.go
@@ -1,3 +1,6 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
 package typeexpr
 
 import (