diff --git a/app/graphql/schema.graphql b/app/graphql/schema.graphql
new file mode 100644
index 00000000..d770e4aa
--- /dev/null
+++ b/app/graphql/schema.graphql
@@ -0,0 +1,97 @@
+type Assignment {
+  createdAt: ISO8601DateTime!
+  id: ID!
+  project: Project!
+  status: String!
+  updatedAt: ISO8601DateTime!
+  user: User!
+  workWeeks: [WorkWeek!]!
+}
+
+type Client {
+  createdAt: ISO8601DateTime!
+  description: String
+  id: ID!
+  name: String!
+  projects: [Project!]!
+  status: String!
+  updatedAt: ISO8601DateTime!
+}
+
+type Company {
+  clients: [Client!]!
+  createdAt: ISO8601DateTime!
+  id: ID!
+  name: String!
+  projects: [Project!]!
+  updatedAt: ISO8601DateTime!
+  users: [User!]!
+}
+
+"""
+An ISO 8601-encoded datetime
+"""
+scalar ISO8601DateTime @specifiedBy(url: "https://tools.ietf.org/html/rfc3339")
+
+type Mutation {
+  createWorkWeek: WorkWeek!
+  setCurrentCompany(companyId: ID!): Company!
+  updateWorkWeek: WorkWeek!
+}
+
+type Project {
+  assignments: [Assignment!]!
+  client: Client!
+  createdAt: ISO8601DateTime!
+  id: ID!
+  name: String!
+  paymentFrequency: String!
+  status: String!
+  updatedAt: ISO8601DateTime!
+  users: [User!]!
+  workWeeks: [WorkWeek!]!
+}
+
+type Query {
+  clients: [Client!]!
+  projectAssignments(
+    """
+    ID of the project to fetch assignments for.
+    """
+    projectId: ID!
+  ): [Assignment!]!
+  userAssignments(
+    """
+    ID of the user to fetch assignments for. The current user's assignments will
+    be returned if this argument is not provided.
+    """
+    userId: ID
+  ): [Assignment!]!
+  users: [User!]!
+}
+
+type User {
+  assignments: [Assignment!]!
+  companies: [Company!]!
+  createdAt: ISO8601DateTime!
+  currentCompanyId: ID
+  email: String!
+  id: ID!
+  name: String!
+  projects: [Project!]!
+  updatedAt: ISO8601DateTime!
+}
+
+type WorkWeek {
+  actualHours: Int!
+  assignmentId: Int!
+  beginningOfWeek: Int!
+  createdAt: ISO8601DateTime!
+  cweek: Int!
+  estimatedHours: Int!
+  id: ID!
+  project: Project!
+  updatedAt: ISO8601DateTime!
+  user: User!
+  year: Int!
+}
diff --git a/lib/tasks/graphql.rake b/lib/tasks/graphql.rake
new file mode 100644
index 00000000..1e99e8be
--- /dev/null
+++ b/lib/tasks/graphql.rake
@@ -0,0 +1,10 @@
+# lib/tasks/graphql.rake
+task dump_schema: :environment do
+  # Get a string containing the definition in GraphQL IDL:
+  schema_defn = StaffplanReduxSchema.to_definition
+  # Choose a place to write the schema dump:
+  schema_path = "app/graphql/schema.graphql"
+  # Write the schema dump to that file:
+  File.write(Rails.root.join(schema_path), schema_defn)
+  puts "Updated #{schema_path}"
+end
\ No newline at end of file
diff --git a/spec/graphql/staff_plan_schema_spec.rb b/spec/graphql/staff_plan_schema_spec.rb
new file mode 100644
index 00000000..fb5c129f
--- /dev/null
+++ b/spec/graphql/staff_plan_schema_spec.rb
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe "StaffPlan GraphQL Schema dump" do
+  it "matches the printed schema" do
+    current_definition = StaffplanReduxSchema.to_definition
+    printout_definition = File.read(Rails.root.join("app/graphql/schema.graphql"))
+    # If this fails, update the printed schema with `bundle exec rake dump_schema`
+    expect(current_definition).to eq(printout_definition)
+  end
+end
\ No newline at end of file