dockerfile and terraform syntax checking

.spacemacs

@@ -80,8 +80,8 @@ This function should only modify configuration layer settings."
      syntax-checking
      ;; version-control
      treemacs
-     docker
+     (docker    :variables docker-dockerfile-backend 'lsp)
-     terraform
+     (terraform :variables terraform-backend 'lsp)
      )
 
 
@@ -799,6 +799,24 @@ before packages are loaded."
   ;; otherwise it locks up emacs startup
   (add-hook 'sh-mode-hook #'lsp-deferred)
 
+  ;; Chain mode-specific checkers (Hadolint, TFLint) to run after LSP.
+  ;; We use `lsp-managed-mode-hook` to ensure the `lsp` checker is fully
+  ;; defined before modifying its chain, preventing "lsp is not a valid
+  ;; syntax checker" errors during startup.
+  (defun jp/lsp-flycheck-chaining ()
+    "Chain specific checkers to LSP based on the current mode."
+    (cond
+     ;; Dockerfile: LSP -> Hadolint
+     ((derived-mode-p 'dockerfile-mode)
+      (flycheck-add-next-checker 'lsp 'dockerfile-hadolint))
+
+     ;; Terraform: LSP -> TFLint
+     ((derived-mode-p 'terraform-mode)
+      (flycheck-add-next-checker 'lsp 'terraform-tflint))))
+
+  ;; Run this whenever LSP starts managing a buffer
+  (add-hook 'lsp-managed-mode-hook #'jp/lsp-flycheck-chaining)
+
   ;; / LSP config
 
   ;; jira config