# API Compatibility

This is an internal documentation summarizing the currently supported SDK and TFLint versions and any compatibility caveats.

Protocol version: 11  
SDK version: v0.16.0+
TFLint version: v0.46.0+

- Ephemeral value is introduced in SDK v0.22.0 and TFLint v0.55.0. TFLint returns ErrSensitive instead of ephemeral values to plugins built with SDK v0.21.0.
  - https://github.com/terraform-linters/tflint/pull/2178
  - https://github.com/terraform-linters/tflint-plugin-sdk/pull/358
