fix: make ai_task.id change backwards compatible

integration/coder-ai-task/main.tf

@@ -0,0 +1,63 @@
+terraform {
+  required_providers {
+    coder = {
+      source = "coder/coder"
+    }
+    local = {
+      source = "hashicorp/local"
+    }
+  }
+}
+
+data "coder_workspace" "me" {}
+
+resource "coder_agent" "dev" {
+  os   = "linux"
+  arch = "amd64"
+  dir  = "/workspace"
+}
+
+resource "coder_app" "ai_interface" {
+  agent_id = coder_agent.dev.id
+  slug     = "ai-chat"
+  share    = "owner"
+  url      = "http://localhost:8080"
+}
+
+data "coder_parameter" "ai_prompt" {
+  type        = "string"
+  name        = "AI Prompt"
+  default     = ""
+  description = "Write a prompt for Claude Code"
+  mutable     = true
+}
+
+resource "coder_ai_task" "task" {
+  sidebar_app {
+    id = coder_app.ai_interface.id
+  }
+}
+
+locals {
+  # NOTE: these must all be strings in the output
+  output = {
+    "ai_task.id"     = coder_ai_task.task.id
+    "ai_task.app_id" = coder_ai_task.task.app_id
+    "ai_task.prompt" = coder_ai_task.task.prompt
+    "app.id"         = coder_app.ai_interface.id
+  }
+}
+
+variable "output_path" {
+  type = string
+}
+
+resource "local_file" "output" {
+  filename = var.output_path
+  content  = jsonencode(local.output)
+}
+
+output "output" {
+  value     = local.output
+  sensitive = true
+}

integration/coder-ai-task/parameters.yaml

@@ -0,0 +1 @@
+AI Prompt: "some prompt"

integration/integration_test.go

@@ -211,13 +211,24 @@ func TestIntegration(t *testing.T) {
 				"coder_app.defaulted.hidden": "false",
 			},
 		},
+		{
+			name:       "coder-ai-task",
+			minVersion: "v2.26.0",
+			expectedOutput: map[string]string{
+				"ai_task.id":     `^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$`,
+				"ai_task.prompt": "default",
+				"ai_task.app_id": `^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$`,
+				"app.id":         `^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$`,
+			},
+		},
 	} {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()
 			if coderVersion != "latest" && semver.Compare(coderVersion, tt.minVersion) < 0 {
 				t.Skipf("skipping due to CODER_VERSION %q < minVersion %q", coderVersion, tt.minVersion)
 			}
+
 			// Given: we have an existing Coder deployment running locally
 			// Import named template
 

provider/ai_task.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"os"
 
+	"github.com/google/uuid"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
@@ -27,10 +28,17 @@ func aiTaskResource() *schema.Resource {
 
 		Description: "Use this resource to define Coder tasks.",
 		CreateContext: func(c context.Context, resourceData *schema.ResourceData, i any) diag.Diagnostics {
+			var diags diag.Diagnostics
+
 			if idStr := os.Getenv("CODER_TASK_ID"); idStr != "" {
 				resourceData.SetId(idStr)
 			} else {
-				return diag.Errorf("CODER_TASK_ID must be set")
+				resourceData.SetId(uuid.NewString())
+
+				diags = append(diags, diag.Diagnostic{
+					Severity: diag.Warning,
+					Summary:  "`CODER_TASK_ID` should be set. If you are seeing this message, the version of the Coder Terraform provider you are using is likely too new for your current Coder version.",
+				})
 			}
 
 			if prompt := os.Getenv("CODER_TASK_PROMPT"); prompt != "" {
@@ -58,7 +66,7 @@ func aiTaskResource() *schema.Resource {
 				return diag.Errorf("'app_id' must be set")
 			}
 
-			return nil
+			return diags
 		},
 		ReadContext:   schema.NoopContext,
 		DeleteContext: schema.NoopContext,