1 files changed, 43 insertions, 0 deletions
diff --git a/lib/dispatch/tool/files/write_file.rb b/lib/dispatch/tool/files/write_file.rb
new file mode 100644
index 0000000..218c310
--- /dev/null
+++ b/lib/dispatch/tool/files/write_file.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+module Dispatch
+  module Tool
+    module Files
+      WRITE_FILE = Dispatch::Tools::Definition.new(
+        name: "write_file",
+        description: "Write or overwrite a file with the given content. Creates parent directories if needed.",
+        parameters: {
+          type: "object",
+          properties: {
+            path: {
+              type: "string",
+              description: "Path to the file to write, relative to the worktree root."
+            },
+            content: {
+              type: "string",
+              description: "The content to write to the file."
+            }
+          },
+          required: %w[path content],
+          additionalProperties: false
+        }
+      ) do |params, context|
+        worktree_path = context[:worktree_path]
+        path = params[:path]
+        content = params[:content]
+
+        resolved = begin
+          Sandbox.resolve_path(path, worktree_path:)
+        rescue SandboxError => e
+          next Dispatch::Tools::Result.failure(error: e.message)
+        end
+
+        FileUtils.mkdir_p(File.dirname(resolved))
+        File.write(resolved, content)
+
+        byte_count = content.bytesize
+        Dispatch::Tools::Result.success(output: "Wrote #{byte_count} bytes to #{path}")
+      end
+    end
+  end
+end