diff --git a/modules/aws-terraform-backend/.terraform-docs.yml b/modules/aws-terraform-backend/.terraform-docs.yml
new file mode 100644
index 000000000..49be8b854
--- /dev/null
+++ b/modules/aws-terraform-backend/.terraform-docs.yml
@@ -0,0 +1,48 @@
+formatter: "markdown" # this is required
+
+version: ""
+
+header-from: docs/header.md
+footer-from: docs/footer.md
+
+recursive:
+  enabled: false
+  path: modules
+  include-main: true
+
+sections:
+  hide: []
+  show: []
+
+content: ""
+
+output:
+  file: "README.md"
+  mode: inject
+  template: |-
+    <!-- BEGIN_TF_DOCS -->
+    {{ .Content }}
+    <!-- END_TF_DOCS -->
+
+output-values:
+  enabled: false
+  from: ""
+
+sort:
+  enabled: true
+  by: name
+
+settings:
+  anchor: true
+  color: true
+  default: true
+  description: false
+  escape: true
+  hide-empty: false
+  html: true
+  indent: 2
+  lockfile: true
+  read-comments: true
+  required: true
+  sensitive: true
+  type: true
diff --git a/modules/aws-terraform-backend/README.md b/modules/aws-terraform-backend/README.md
index 87d074f0b..8de094109 100644
--- a/modules/aws-terraform-backend/README.md
+++ b/modules/aws-terraform-backend/README.md
@@ -1,65 +1,136 @@
 <!-- BEGIN_TF_DOCS -->
+# **AWS Terraform Backend Module**
+
+## Overview
+
+This module provisions the AWS infrastructure typically required by a Terraform backend: an S3 bucket for state files, optional DynamoDB locking, and IAM policies/roles to access backend resources.
+
+It also supports rendering an optional CloudFormation template and uploading it to S3 so another account can assume an administrative role for backend operations when needed.
+
+The module is intended for shared platform/backend setups where consistency, least-privilege access, and safe state handling are important.
+
+## Key Features
+
+- **S3 state bucket**: Creates an S3 bucket with versioning, encryption, and public access blocking.
+- **Optional DynamoDB locking**: Creates a lock table when `locks_table_name` is provided.
+- **IAM backend access role and policies**: Manages backend IAM role plus attachable policy for extra roles.
+- **Optional CloudFormation role template upload**: Generates and uploads role template to S3 when enabled.
+
+## Basic Usage
+
+### Backend with DynamoDB locking
+
+```hcl
+module "terraform_backend" {
+  source = "git::https://github.com/prefapp/tfm.git//modules/aws-terraform-backend"
+
+  tfstate_bucket_name   = "my-terraform-state-bucket"
+  tfstate_object_prefix = "envs/prod/terraform.tfstate"
+  locks_table_name      = "my-terraform-locks"
+
+  aws_account_id                              = "123456789012"
+  cloudformation_admin_role_for_client_account = "tf-backend-admin"
+}
+```
+
+### Backend without DynamoDB locking (Terraform >= 1.11)
+
+```hcl
+module "terraform_backend" {
+  source = "git::https://github.com/prefapp/tfm.git//modules/aws-terraform-backend"
+
+  tfstate_bucket_name   = "my-terraform-state-bucket"
+  tfstate_object_prefix = "envs/dev/terraform.tfstate"
+  locks_table_name      = null
+
+  aws_account_id                              = "123456789012"
+  cloudformation_admin_role_for_client_account = "tf-backend-admin"
+}
+```
+
 ## Requirements
 
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.5 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | ~> 5.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | ~> 6.40 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | ~> 5.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | 5.97.0 |
+
+## Modules
+
+No modules.
 
 ## Resources
 
 | Name | Type |
 |------|------|
-| [aws_s3_bucket](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket) | resource |
-| [aws_s3_bucket_versioning](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_versioning) | resource |
-| [aws_s3_bucket_server_side_encryption_configuration](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_server_side_encryption_configuration) | resource |
-| [aws_s3_bucket_public_access_block](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_public_access_block) | resource |
-| [aws_s3_object](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_object) | resource |
-| [aws_dynamodb_table](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/dynamodb_table) | resource |
-| [aws_iam_role](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role)| resource |
-| [aws_iam_policy](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
-| [aws_iam_role_policy_attachment](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy_attachment) | resource |
-
+| [aws_dynamodb_table.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/dynamodb_table) | resource |
+| [aws_iam_policy.full](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
+| [aws_iam_policy.limited](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
+| [aws_iam_role.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role) | resource |
+| [aws_iam_role_policy_attachment.client](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
+| [aws_iam_role_policy_attachment.extra_roles](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
+| [aws_s3_bucket.tfstate](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket) | resource |
+| [aws_s3_bucket_public_access_block.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_public_access_block) | resource |
+| [aws_s3_bucket_server_side_encryption_configuration.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_server_side_encryption_configuration) | resource |
+| [aws_s3_bucket_versioning.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_versioning) | resource |
+| [aws_s3_object.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_object) | resource |
+| [aws_caller_identity.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) | data source |
 
 ## Inputs
 
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
-| tfstate_bucket_name | Name of the S3 Bucket used for storing the Terraform state for the workspaces | string | -- | Y |
-| tfstate_object_prefix | Prefix to the S3 bucket objects | string | -- | Y |
-| locks_table_name | "Name of the locks DynamoDB table. Not needed if Terraform version is 1.11 or newer | string | null | N |
-| aws_region | AWS Region | string | Default provider region (i.e. "us-east-1") | N |
-| tags | Common tags for all resources | map(string) | {} | N |
-| tfstate_force_destroy | Allow destroying the Terraform state bucket even if it contains objects | boolean | false | N |
-| tfstate_enable_versioning | Enable versioning on the bucket | boolean | true | N |
-| tfbackend_access_role_name | Terraform backend access role: role name for Terraform Backend | string | - | Y |
-| backend_extra_roles | Additional roles to add to the Terraform backend access role | list(string) | [] | N |
-| aws_account_id | AWS Account ID that will assume the role to access the S3 bucket and the dynamodb table | string | - | Y |
-| cloudformation_admin_role_for_client_account | Role name that will assume the role to access the S3 bucket and the dynamodb table | string | - | Y |
-| generate_cloudformation_role_for_client_account | Decide whether to generate a cloudformation stack with a iam role to access the S3 bucket and the dynamodb table | boolean | true | N |
-| upload_cloudformation_role | Decide whether to upload to S3 the cloudformation stack | boolean | true | N |
-| s3_bucket_cloudformation_role | Name of the S3 bucket where the cloudformation template will be uploaded | string | "" | Only if "upload_cloudformation_role" is true |
-| s3_bucket_cloudformation_role_key | Key to use when uploading the template to S3 | string | cloudformation/rendered-template.yaml | N |
-| create_github_iam | Controls if we want to assume the backend role from Github Actions | bool | false | N |
-| github_repository | Name of the GitHub repository that will have access to the backend | string | "" | N |
-
+| <a name="input_aws_account_id"></a> [aws\_account\_id](#input\_aws\_account\_id) | AWS Account ID that will assume the role to access the S3 bucket and the dynamodb table | `string` | n/a | yes |
+| <a name="input_aws_region"></a> [aws\_region](#input\_aws\_region) | AWS Region | `string` | `null` | no |
+| <a name="input_backend_extra_roles"></a> [backend\_extra\_roles](#input\_backend\_extra\_roles) | Additional roles to add to the Terraform backend access role | `list(string)` | `[]` | no |
+| <a name="input_cloudformation_admin_role_for_client_account"></a> [cloudformation\_admin\_role\_for\_client\_account](#input\_cloudformation\_admin\_role\_for\_client\_account) | Role name that will assume the role to access the S3 bucket and the dynamodb table | `string` | n/a | yes |
+| <a name="input_create_github_iam"></a> [create\_github\_iam](#input\_create\_github\_iam) | Create IAM resources for GitHub | `bool` | `false` | no |
+| <a name="input_generate_cloudformation_role_for_client_account"></a> [generate\_cloudformation\_role\_for\_client\_account](#input\_generate\_cloudformation\_role\_for\_client\_account) | Decide whether to generate a cloudformation stack with a iam role to access the account with administrative privileges | `bool` | `true` | no |
+| <a name="input_github_repository"></a> [github\_repository](#input\_github\_repository) | Name of the GitHub repository to access the backend | `string` | `""` | no |
+| <a name="input_locks_table_name"></a> [locks\_table\_name](#input\_locks\_table\_name) | Name of the locks DynamoDB table | `string` | `null` | no |
+| <a name="input_s3_bucket_cloudformation_role"></a> [s3\_bucket\_cloudformation\_role](#input\_s3\_bucket\_cloudformation\_role) | Name of the S3 bucket where the cloudformation template will be uploaded | `string` | `""` | no |
+| <a name="input_s3_bucket_cloudformation_role_key"></a> [s3\_bucket\_cloudformation\_role\_key](#input\_s3\_bucket\_cloudformation\_role\_key) | Key to use when uploading the template to S3 | `string` | `"cloudformation/rendered-template.yaml"` | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Common tags for all resources | `map(string)` | `{}` | no |
+| <a name="input_tfbackend_access_role_name"></a> [tfbackend\_access\_role\_name](#input\_tfbackend\_access\_role\_name) | Terraform backend access role | `string` | `"terraform-backend-access-role"` | no |
+| <a name="input_tfstate_bucket_name"></a> [tfstate\_bucket\_name](#input\_tfstate\_bucket\_name) | Name of the S3 Bucket used for storing the Terraform state for the workspaces | `string` | n/a | yes |
+| <a name="input_tfstate_enable_versioning"></a> [tfstate\_enable\_versioning](#input\_tfstate\_enable\_versioning) | Enable versioning on the bucket | `bool` | `true` | no |
+| <a name="input_tfstate_force_destroy"></a> [tfstate\_force\_destroy](#input\_tfstate\_force\_destroy) | Allow destroying the Terraform state bucket even if it contains objects | `bool` | `false` | no |
+| <a name="input_tfstate_object_prefix"></a> [tfstate\_object\_prefix](#input\_tfstate\_object\_prefix) | Prefix to the S3 bucket objects | `string` | n/a | yes |
+| <a name="input_upload_cloudformation_role"></a> [upload\_cloudformation\_role](#input\_upload\_cloudformation\_role) | Decide whether to upload to S3 the cloudformation stack | `bool` | `true` | no |
 
 ## Outputs
 
 | Name | Description |
 |------|-------------|
-| tfstate_bucket_arn | ARN of the Terraform State S3 bucket |
-| tfstate_bucket_name | Name of the Terraform State S3 bucket |
-| dynamodb_locks_table_arn | ARN of the DynamoDB table (empty if not created) |
-| dynamodb_locks_table_name | Name of the DynamoDB table (empty if not created) |
-| rendered_template_content | Cloudformation stack with a iam role to access the S3 bucket and the dynamodb table, in YAML format |
-| s3_template_url | S3 URL of the uploaded template (only if `upload_cloudformation_role` is true) |
+| <a name="output_dynamodb_locks_table_arn"></a> [dynamodb\_locks\_table\_arn](#output\_dynamodb\_locks\_table\_arn) | ARN of the DynamoDB table (empty if not created) |
+| <a name="output_dynamodb_locks_table_name"></a> [dynamodb\_locks\_table\_name](#output\_dynamodb\_locks\_table\_name) | Name of the DynamoDB table (empty if not created) |
+| <a name="output_rendered_template_content"></a> [rendered\_template\_content](#output\_rendered\_template\_content) | Cloudformation stack with a iam role to access the S3 bucket and the dynamodb table |
+| <a name="output_s3_template_url"></a> [s3\_template\_url](#output\_s3\_template\_url) | S3 URL of the uploaded template (only if 'upload\_cloudformation\_role' is true) |
+| <a name="output_tfstate_bucket_arn"></a> [tfstate\_bucket\_arn](#output\_tfstate\_bucket\_arn) | ARN of the Terraform State S3 bucket |
+| <a name="output_tfstate_bucket_name"></a> [tfstate\_bucket\_name](#output\_tfstate\_bucket\_name) | Name of the Terraform State S3 bucket |
+
+## Examples
+
+For detailed examples, refer to the [module examples](https://github.com/prefapp/tfm/tree/main/modules/aws-terraform-backend/_examples):
+
+- [Basic](https://github.com/prefapp/tfm/tree/main/modules/aws-terraform-backend/_examples/basic) - Terraform backend with S3 bucket and DynamoDB lock table.
+- [Without Lock Table](https://github.com/prefapp/tfm/tree/main/modules/aws-terraform-backend/_examples/without-lock-table) - Terraform backend with S3 bucket only.
+
+## Resources
+
+- [Terraform S3 Backend](https://developer.hashicorp.com/terraform/language/backend/s3)
+- [Amazon S3](https://aws.amazon.com/s3/)
+- [Amazon DynamoDB](https://aws.amazon.com/dynamodb/)
+- [Terraform AWS Provider](https://registry.terraform.io/providers/hashicorp/aws/latest)
+
+## Support
 
+For issues, questions, or contributions related to this module, please visit the repository's issue tracker: [https://github.com/prefapp/tfm/issues](https://github.com/prefapp/tfm/issues)
 <!-- END_TF_DOCS -->
 
diff --git a/modules/aws-terraform-backend/_examples/basic/main.tf b/modules/aws-terraform-backend/_examples/basic/main.tf
new file mode 100644
index 000000000..6bb33985a
--- /dev/null
+++ b/modules/aws-terraform-backend/_examples/basic/main.tf
@@ -0,0 +1,14 @@
+provider "aws" {
+  region = "eu-west-1"
+}
+
+module "terraform_backend" {
+  source = "../../"
+
+  tfstate_bucket_name   = "example-terraform-state-bucket"
+  tfstate_object_prefix = "envs/prod/terraform.tfstate"
+  locks_table_name      = "example-terraform-locks"
+
+  aws_account_id                               = "123456789012"
+  cloudformation_admin_role_for_client_account = "tf-backend-admin"
+}
diff --git a/modules/aws-terraform-backend/_examples/without-lock-table/main.tf b/modules/aws-terraform-backend/_examples/without-lock-table/main.tf
new file mode 100644
index 000000000..feb929d4a
--- /dev/null
+++ b/modules/aws-terraform-backend/_examples/without-lock-table/main.tf
@@ -0,0 +1,14 @@
+provider "aws" {
+  region = "eu-west-1"
+}
+
+module "terraform_backend" {
+  source = "../../"
+
+  tfstate_bucket_name   = "example-terraform-state-bucket"
+  tfstate_object_prefix = "envs/dev/terraform.tfstate"
+  locks_table_name      = null
+
+  aws_account_id                               = "123456789012"
+  cloudformation_admin_role_for_client_account = "tf-backend-admin"
+}
diff --git a/modules/aws-terraform-backend/docs/footer.md b/modules/aws-terraform-backend/docs/footer.md
new file mode 100644
index 000000000..78a5ff0ad
--- /dev/null
+++ b/modules/aws-terraform-backend/docs/footer.md
@@ -0,0 +1,17 @@
+## Examples
+
+For detailed examples, refer to the [module examples](https://github.com/prefapp/tfm/tree/main/modules/aws-terraform-backend/_examples):
+
+- [Basic](https://github.com/prefapp/tfm/tree/main/modules/aws-terraform-backend/_examples/basic) - Terraform backend with S3 bucket and DynamoDB lock table.
+- [Without Lock Table](https://github.com/prefapp/tfm/tree/main/modules/aws-terraform-backend/_examples/without-lock-table) - Terraform backend with S3 bucket only.
+
+## Resources
+
+- [Terraform S3 Backend](https://developer.hashicorp.com/terraform/language/backend/s3)
+- [Amazon S3](https://aws.amazon.com/s3/)
+- [Amazon DynamoDB](https://aws.amazon.com/dynamodb/)
+- [Terraform AWS Provider](https://registry.terraform.io/providers/hashicorp/aws/latest)
+
+## Support
+
+For issues, questions, or contributions related to this module, please visit the repository's issue tracker: [https://github.com/prefapp/tfm/issues](https://github.com/prefapp/tfm/issues)
diff --git a/modules/aws-terraform-backend/docs/header.md b/modules/aws-terraform-backend/docs/header.md
new file mode 100644
index 000000000..faaf9faf8
--- /dev/null
+++ b/modules/aws-terraform-backend/docs/header.md
@@ -0,0 +1,48 @@
+# **AWS Terraform Backend Module**
+
+## Overview
+
+This module provisions the AWS infrastructure typically required by a Terraform backend: an S3 bucket for state files, optional DynamoDB locking, and IAM policies/roles to access backend resources.
+
+It also supports rendering an optional CloudFormation template and uploading it to S3 so another account can assume an administrative role for backend operations when needed.
+
+The module is intended for shared platform/backend setups where consistency, least-privilege access, and safe state handling are important.
+
+## Key Features
+
+- **S3 state bucket**: Creates an S3 bucket with versioning, encryption, and public access blocking.
+- **Optional DynamoDB locking**: Creates a lock table when `locks_table_name` is provided.
+- **IAM backend access role and policies**: Manages backend IAM role plus attachable policy for extra roles.
+- **Optional CloudFormation role template upload**: Generates and uploads role template to S3 when enabled.
+
+## Basic Usage
+
+### Backend with DynamoDB locking
+
+```hcl
+module "terraform_backend" {
+  source = "git::https://github.com/prefapp/tfm.git//modules/aws-terraform-backend"
+
+  tfstate_bucket_name   = "my-terraform-state-bucket"
+  tfstate_object_prefix = "envs/prod/terraform.tfstate"
+  locks_table_name      = "my-terraform-locks"
+
+  aws_account_id                              = "123456789012"
+  cloudformation_admin_role_for_client_account = "tf-backend-admin"
+}
+```
+
+### Backend without DynamoDB locking (Terraform >= 1.11)
+
+```hcl
+module "terraform_backend" {
+  source = "git::https://github.com/prefapp/tfm.git//modules/aws-terraform-backend"
+
+  tfstate_bucket_name   = "my-terraform-state-bucket"
+  tfstate_object_prefix = "envs/dev/terraform.tfstate"
+  locks_table_name      = null
+
+  aws_account_id                              = "123456789012"
+  cloudformation_admin_role_for_client_account = "tf-backend-admin"
+}
+```
diff --git a/modules/aws-terraform-backend/variables.tf b/modules/aws-terraform-backend/variables.tf
index c6c86e7f5..3897a10af 100644
--- a/modules/aws-terraform-backend/variables.tf
+++ b/modules/aws-terraform-backend/variables.tf
@@ -14,12 +14,10 @@ variable "locks_table_name" {
   default     = null
 }
 
-data "aws_region" "current" {}
-
 variable "aws_region" {
   description = "AWS Region"
   type        = string
-  default     = data.aws_region.current.name
+  default     = null
 }
 
 variable "tags" {
diff --git a/modules/aws-terraform-backend/versions.tf b/modules/aws-terraform-backend/versions.tf
index 1a6c80da5..0c54474f4 100644
--- a/modules/aws-terraform-backend/versions.tf
+++ b/modules/aws-terraform-backend/versions.tf
@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = "~> 5.97.0"
+      version = "~> 6.40"
     }
   }
 }
diff --git a/specs/aws-terraform-backend/001-update-aws-provider-v6/plan.md b/specs/aws-terraform-backend/001-update-aws-provider-v6/plan.md
new file mode 100644
index 000000000..fa4232899
--- /dev/null
+++ b/specs/aws-terraform-backend/001-update-aws-provider-v6/plan.md
@@ -0,0 +1,13 @@
+# Plan: Update AWS provider constraint to v6 for aws-terraform-backend
+
+**Spec:** `spec.md`
+**Module:** `modules/aws-terraform-backend`
+
+## Steps
+
+1. Update `modules/aws-terraform-backend/versions.tf` to set AWS provider constraint to `~> 6.40`.
+2. Fix `modules/aws-terraform-backend/variables.tf` by replacing the invalid variable default for `aws_region` with a Terraform-valid default.
+3. Add `.terraform-docs.yml` and `docs/header.md` + `docs/footer.md` to the module, following existing AWS module conventions.
+4. Regenerate module `README.md` with `terraform-docs .` from module directory.
+5. Run module checks (`terraform fmt -check` and `terraform init -backend=false`) to verify formatting and provider resolution.
+6. Update `tasks.md` with final completion status.
diff --git a/specs/aws-terraform-backend/001-update-aws-provider-v6/spec.md b/specs/aws-terraform-backend/001-update-aws-provider-v6/spec.md
new file mode 100644
index 000000000..a45b12d82
--- /dev/null
+++ b/specs/aws-terraform-backend/001-update-aws-provider-v6/spec.md
@@ -0,0 +1,37 @@
+# Specification: Update AWS provider constraint to v6 for aws-terraform-backend
+
+**Date:** 2026-06-08
+**Module:** `modules/aws-terraform-backend`
+**Issue:** `#1290` (child of `#927`)
+
+## Problem
+
+The module currently pins the AWS provider to `~> 5.97.0` in `versions.tf`. Per the parent migration issue to AWS provider v6, this module must be updated to allow AWS provider major version 6.
+
+Additionally, validation is blocked because `variables.tf` sets `variable "aws_region"` default using a data source reference (`data.aws_region.current.name`), which is invalid in Terraform variable defaults. The module also lacks the standard `.terraform-docs.yml` + `docs/{header,footer}.md` structure used by AWS modules in this repository.
+
+## Goal
+
+Update the module provider constraint from `~> 5.97.0` to `~> 6.40`, fix `variables.tf` so Terraform initialization is valid, and standardize module docs generation through `terraform-docs` following the AWS module pattern in this repository.
+
+## Scope
+
+- Update `modules/aws-terraform-backend/versions.tf` required provider version for `hashicorp/aws`.
+- Fix invalid default in `modules/aws-terraform-backend/variables.tf` for `variable "aws_region"`.
+- Add `.terraform-docs.yml` and `docs/header.md` + `docs/footer.md` to align with AWS module documentation structure.
+- Regenerate `modules/aws-terraform-backend/README.md` via `terraform-docs .` (generated, not hand-edited) so requirements/providers sections reflect v6.
+- Run formatting/validation checks relevant to the touched module.
+
+## Out of Scope
+
+- Functional refactors unrelated to AWS provider major version migration.
+- Cross-module updates.
+- Any `CHANGELOG.md` modification (handled by Release Please automation).
+
+## Acceptance Criteria
+
+- `modules/aws-terraform-backend/versions.tf` sets AWS provider constraint to `~> 6.40`.
+- `modules/aws-terraform-backend/variables.tf` no longer uses a data source reference in variable defaults.
+- Module contains `.terraform-docs.yml` and `docs/header.md` + `docs/footer.md`.
+- `modules/aws-terraform-backend/README.md` reflects AWS provider v6 requirement.
+- Formatting and validation checks for the module complete without errors.
diff --git a/specs/aws-terraform-backend/001-update-aws-provider-v6/tasks.md b/specs/aws-terraform-backend/001-update-aws-provider-v6/tasks.md
new file mode 100644
index 000000000..a6c37c233
--- /dev/null
+++ b/specs/aws-terraform-backend/001-update-aws-provider-v6/tasks.md
@@ -0,0 +1,17 @@
+# Tasks: Update AWS provider constraint to v6 for aws-terraform-backend
+
+**Module:** `aws-terraform-backend`
+**Spec:** `spec.md`
+**Plan:** `plan.md`
+
+## Tasks
+
+- [x] 1. Create `spec.md`, `plan.md`, and `tasks.md` for this change.
+- [x] 2. Update `modules/aws-terraform-backend/versions.tf` to require AWS provider `~> 6.40`.
+- [x] 3. Fix `modules/aws-terraform-backend/variables.tf` to remove invalid variable default reference (`data.aws_region.current.name`).
+- [x] 4. Add `.terraform-docs.yml` and `docs/header.md` + `docs/footer.md` to align with AWS module docs conventions.
+- [x] 5. Regenerate `modules/aws-terraform-backend/README.md` using `terraform-docs` (without manual README edits).
+- [x] 6. Run formatting/validation checks for the touched module (`terraform fmt -check`, `terraform init -backend=false -upgrade`, `terraform validate`).
+- [x] 7. Final review and mark all tasks complete.
+
+**Status:** Complete