diff --git a/lua/ember/lsp/typescript.lua b/lua/ember/lsp/typescript.lua
index 079f7f4..99f2879 100644
--- a/lua/ember/lsp/typescript.lua
+++ b/lua/ember/lsp/typescript.lua
@@ -74,5 +74,31 @@ vim.lsp.config('glint', {
   filetypes = allFiletypes,
 })
 
+-- TypeScript 7's native LSP (nvim-lspconfig's `tsc`), for projects that
+-- declare `contentMappers` in tsconfig.json (e.g. ember-content-mapper).
+-- The mapper transforms gts/gjs for TypeScript itself, so ts_ls and glint
+-- both stay detached in these projects (see lsp/utils.lua).
+vim.lsp.config('tsc', {
+  root_dir = utils.is_content_mapper_project,
+  filetypes = tsFiletypes,
+  init_options = {
+    -- Content mappers spawn processes declared by the project, so TypeScript
+    -- requires this explicit opt-in (VS Code sends it for trusted workspaces).
+    runExternalCode = true,
+  },
+  get_language_id = function(_, filetype)
+    if filetype == 'typescript.glimmer' then
+      return 'typescript'
+    end
+
+    if filetype == 'javascript.glimmer' then
+      return 'javascript'
+    end
+
+    return filetype
+  end,
+})
+
 vim.lsp.enable('ts_ls')
 vim.lsp.enable('glint')
+vim.lsp.enable('tsc')
diff --git a/lua/ember/lsp/utils.lua b/lua/ember/lsp/utils.lua
index dcc2b1b..87052ba 100644
--- a/lua/ember/lsp/utils.lua
+++ b/lua/ember/lsp/utils.lua
@@ -37,10 +37,15 @@ local function read_nearest_ts_config()
   --   is used.
   local isGlintV1 = string.find(contents, '"glint"')
   local hasGlintPlugin = string.find(manifest, "@glint/ember%-tsc")
+  -- TypeScript 7 content mappers (e.g. ember-content-mapper):
+  -- tsconfig.json declares the mappers directly, and TypeScript's own LSP
+  -- handles gts/gjs, so neither ts_ls nor glint should attach.
+  local hasContentMappers = string.find(contents, '"contentMappers"')
 
   return {
     isGlintV1 = not not isGlintV1,
     isGlintV2 = not not hasGlintPlugin,
+    isContentMapper = not not hasContentMappers,
     rootDir = rootDir,
   };
 end
@@ -55,6 +60,10 @@ local function is_glint_project(bufnr, onDir)
     return nil
   end
 
+  if (result.isContentMapper) then
+    return nil
+  end
+
   if (result.isGlintV2) then
     return nil
   end
@@ -73,6 +82,10 @@ local function is_ts_project(bufnr, onDir)
     return nil
   end
 
+  if (result.isContentMapper) then
+    return nil
+  end
+
   if (result.isGlintV2) then
     return onDir(result.rootDir)
   end
@@ -84,7 +97,22 @@ local function is_ts_project(bufnr, onDir)
   return onDir(result.rootDir)
 end
 
+local function is_content_mapper_project(bufnr, onDir)
+  local result = read_nearest_ts_config()
+
+  if not result then
+    return nil
+  end
+
+  if (not result.isContentMapper) then
+    return nil
+  end
+
+  return onDir(result.rootDir)
+end
+
 return {
   is_glint_v1_project = is_glint_project,
   is_ts_project = is_ts_project,
+  is_content_mapper_project = is_content_mapper_project,
 }