feat: add Coder Tasks example template (#182)

## Description

This PR adds an example template for Coder Tasks under "Coder Labs."
Coder Labs will be a place where we can post examples, templates,
modules, etc with fewer guarantees as they are designed for
example/reference use and not production.

---

## Type of Change

- [x] New template
- [ ] New module
- [ ] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [ ] Other

---

If you are in dogfood, you can try the template here:
https://dev.coder.com/templates/coder/tasks-realworld
This commit is contained in:
Ben Potter 2025-07-07 05:04:18 -07:00 committed by GitHub
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---
display_name: Coder Labs
bio: Collection of example templates and modules for Coder. Designed for reference, not production use.
github: coder
avatar: ./.images/avatar.svg
linkedin: https://www.linkedin.com/company/coderhq
website: https://discord.gg/coder
status: community
---
å
# Coder Labs
Collection of example templates and modules for Coder. Designed for reference, not production use.

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---
display_name: Tasks on Docker
description: Run Coder Tasks on Docker with an example application
icon: ./.images/tasks.svg
maintainer_github: coder
verified: false
tags: [docker, container, ai, tasks]
---
# Run Coder Tasks on Docker
This is an example template for running [Coder Tasks](https://coder.com/docs/ai-coder/tasks), Claude Code, along with a [real world application](https://realworld-docs.netlify.app/).
![Tasks](../../.images/tasks-screenshot.png)
This is a fantastic starting point for working with AI agents with Coder Tasks. Try prompts such as:
- "Make the background color blue"
- "Add a dark mode"
- "Rewrite the entire backend in Go"
## Included in this template
This template is designed to be an example and a reference for building other templates with Coder Tasks. You can always run Coder Tasks on different infrastructure (e.g. as on Kubernetes, VMs) and with your own GitHub repositories, MCP servers, images, etc.
Additionally, this template uses our [Claude Code](https://registry.coder.com/modules/coder/claude-code) module, but [other agents](https://registry.coder.com/modules?search=tag%3Aagent) or even [custom agents](https://coder.com/docs/ai-coder/custom-agents) can be used in its place.
This template uses a [Workspace Preset](https://coder.com/docs/admin/templates/extending-templates/parameters#workspace-presets) that pre-defines:
- Universal Container Image (e.g. contains Node.js, Java, Python, Ruby, etc)
- MCP servers (desktop-commander for long-running logs, playwright for previewing changes)
- System prompt and [repository](https://github.com/coder-contrib/realworld-django-rest-framework-angular) for the AI agent
- Startup script to initialize the repository and start the development server
## Add this template to your Coder deployment
You can also add this template to your Coder deployment and begin tinkering right away!
### Prerequisites
- Coder installed (see [our docs](https://coder.com/docs/install)), ideally a Linux VM with Docker
- Anthropic API Key (or access to Anthropic models via Bedrock or Vertex, see [Claude Code docs](https://docs.anthropic.com/en/docs/claude-code/third-party-integrations))
- Access to a Docker socket
- If on the local VM, ensure the `coder` user is added to the Docker group (docs)
```sh
# Add coder user to Docker group
sudo adduser coder docker
# Restart Coder server
sudo systemctl restart coder
# Test Docker
sudo -u coder docker ps
```
- If on a remote VM, see the [Docker Terraform provider documentation](https://registry.terraform.io/providers/kreuzwerker/docker/latest/docs#remote-hosts) to configure a remote host
To import this template into Coder, first create a template from "Scratch" in the template editor.
Visit this URL for your Coder deployment:
```sh
https://coder.example.com/templates/new?exampleId=scratch
```
After creating the template, paste the contents from [main.tf](./main.tf) into the template editor and save.
Alternatively, you can use the Coder CLI to [push the template](https://coder.com/docs/reference/cli/templates_push)
```sh
# Download the CLI
curl -L https://coder.com/install.sh | sh
# Log in to your deployment
coder login https://coder.example.com
# Clone the registry
git clone https://github.com/coder/registry
cd registry
# Navigate to this template
cd registry/coder-labs/templates/tasks-docker
# Push the template
coder templates push
```

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terraform {
required_providers {
coder = {
source = "coder/coder"
}
docker = {
source = "kreuzwerker/docker"
}
}
}
# This template requires a valid Docker socket
# However, you can reference our Kubernetes/VM
# example templates and adapt the Claude Code module
#
# see: https://registry.coder.com/templates
provider "docker" {}
# The Claude Code module does the automatic task reporting
# Other agent modules: https://registry.coder.com/modules?search=agent
# Or use a custom agent:
module "claude-code" {
count = data.coder_workspace.me.start_count
source = "registry.coder.com/coder/claude-code/coder"
version = "2.0.0"
agent_id = coder_agent.main.id
folder = "/home/coder/projects"
install_claude_code = true
claude_code_version = "latest"
order = 999
experiment_post_install_script = data.coder_parameter.setup_script.value
# This enables Coder Tasks
experiment_report_tasks = true
}
# You can also use a model provider, like AWS Bedrock or Vertex by replacing
# this with the special env vars from the Claude Code docs.
# see: https://docs.anthropic.com/en/docs/claude-code/third-party-integrations
variable "anthropic_api_key" {
type = string
description = "Generate one at: https://console.anthropic.com/settings/keys"
sensitive = true
}
resource "coder_env" "anthropic_api_key" {
agent_id = coder_agent.main.id
name = "CODER_MCP_CLAUDE_API_KEY"
value = var.anthropic_api_key
}
# We are using presets to set the prompts, image, and set up instructions
# See https://coder.com/docs/admin/templates/extending-templates/parameters#workspace-presets
data "coder_workspace_preset" "default" {
name = "Real World App: Angular + Django"
default = true
parameters = {
"system_prompt" = <<-EOT
-- Framing --
You are a helpful assistant that can help with code. You are running inside a Coder Workspace and provide status updates to the user via Coder MCP. Stay on track, feel free to debug, but when the original plan fails, do not choose a different route/architecture without checking the user first.
-- Tool Selection --
- playwright: previewing your changes after you made them
to confirm it worked as expected
- desktop-commander - use only for commands that keep running
(servers, dev watchers, GUI apps).
- Built-in tools - use for everything else:
(file operations, git commands, builds & installs, one-off shell commands)
Remember this decision rule:
- Stays running? desktop-commander
- Finishes immediately? built-in tools
-- Context --
There is an existing app and tmux dev server running on port 8000. Be sure to read it's CLAUDE.md (./realworld-django-rest-framework-angular/CLAUDE.md) to learn more about it.
Since this app is for demo purposes and the user is previewing the homepage and subsequent pages, aim to make the first visual change/prototype very quickly so the user can preview it, then focus on backend or logic which can be a more involved, long-running architecture plan.
EOT
"setup_script" = <<-EOT
# Set up projects dir
mkdir -p /home/coder/projects
cd $HOME/projects
# Packages: Install additional packages
sudo apt-get update && sudo apt-get install -y tmux
if ! command -v google-chrome >/dev/null 2>&1; then
yes | npx playwright install chrome
fi
# MCP: Install and configure MCP Servers
npm install -g @wonderwhy-er/desktop-commander
claude mcp add playwright npx -- @playwright/mcp@latest --headless --isolated --no-sandbox
claude mcp add desktop-commander desktop-commander
# Repo: Clone and pull changes from the git repository
if [ ! -d "realworld-django-rest-framework-angular" ]; then
git clone https://github.com/coder-contrib/realworld-django-rest-framework-angular.git
else
cd realworld-django-rest-framework-angular
git fetch
# Check for uncommitted changes
if git diff-index --quiet HEAD -- && \
[ -z "$(git status --porcelain --untracked-files=no)" ] && \
[ -z "$(git log --branches --not --remotes)" ]; then
echo "Repo is clean. Pulling latest changes..."
git pull
else
echo "Repo has uncommitted or unpushed changes. Skipping pull."
fi
cd ..
fi
# Initialize: Start the development server
cd realworld-django-rest-framework-angular && ./start-dev.sh
EOT
"preview_port" = "4200"
"container_image" = "codercom/example-universal:ubuntu"
"jetbrains_ide" = "PY"
}
# Pre-builds is a Coder Premium
# feature to speed up workspace creation
#
# see https://coder.com/docs/admin/templates/extending-templates/prebuilt-workspaces
# prebuilds {
# instances = 1
# expiration_policy {
# ttl = 86400 # Time (in seconds) after which unclaimed prebuilds are expired (1 day)
# }
# }
}
# Advanced parameters (these are all set via preset)
data "coder_parameter" "system_prompt" {
name = "system_prompt"
display_name = "System Prompt"
type = "string"
form_type = "textarea"
description = "System prompt for the agent with generalized instructions"
mutable = false
}
data "coder_parameter" "ai_prompt" {
type = "string"
name = "AI Prompt"
default = ""
description = "Write a prompt for Claude Code"
mutable = true
}
data "coder_parameter" "setup_script" {
name = "setup_script"
display_name = "Setup Script"
type = "string"
form_type = "textarea"
description = "Script to run before running the agent"
mutable = false
}
data "coder_parameter" "container_image" {
name = "container_image"
display_name = "Container Image"
type = "string"
default = "codercom/example-universal:ubuntu"
mutable = false
}
data "coder_parameter" "preview_port" {
name = "preview_port"
display_name = "Preview Port"
description = "The port the web app is running to preview in Tasks"
type = "number"
default = "3000"
mutable = false
}
# Other variables for Claude Code
resource "coder_env" "claude_task_prompt" {
agent_id = coder_agent.main.id
name = "CODER_MCP_CLAUDE_TASK_PROMPT"
value = data.coder_parameter.ai_prompt.value
}
resource "coder_env" "app_status_slug" {
agent_id = coder_agent.main.id
name = "CODER_MCP_APP_STATUS_SLUG"
value = "claude-code"
}
resource "coder_env" "claude_system_prompt" {
agent_id = coder_agent.main.id
name = "CODER_MCP_CLAUDE_SYSTEM_PROMPT"
value = data.coder_parameter.system_prompt.value
}
data "coder_provisioner" "me" {}
data "coder_workspace" "me" {}
data "coder_workspace_owner" "me" {}
resource "coder_agent" "main" {
arch = data.coder_provisioner.me.arch
os = "linux"
startup_script = <<-EOT
set -e
# Prepare user home with default files on first start.
if [ ! -f ~/.init_done ]; then
cp -rT /etc/skel ~
touch ~/.init_done
fi
EOT
# These environment variables allow you to make Git commits right away after creating a
# workspace. Note that they take precedence over configuration defined in ~/.gitconfig!
# You can remove this block if you'd prefer to configure Git manually or using
# dotfiles. (see docs/dotfiles.md)
env = {
GIT_AUTHOR_NAME = coalesce(data.coder_workspace_owner.me.full_name, data.coder_workspace_owner.me.name)
GIT_AUTHOR_EMAIL = "${data.coder_workspace_owner.me.email}"
GIT_COMMITTER_NAME = coalesce(data.coder_workspace_owner.me.full_name, data.coder_workspace_owner.me.name)
GIT_COMMITTER_EMAIL = "${data.coder_workspace_owner.me.email}"
}
# The following metadata blocks are optional. They are used to display
# information about your workspace in the dashboard. You can remove them
# if you don't want to display any information.
# For basic resources, you can use the `coder stat` command.
# If you need more control, you can write your own script.
metadata {
display_name = "CPU Usage"
key = "0_cpu_usage"
script = "coder stat cpu"
interval = 10
timeout = 1
}
metadata {
display_name = "RAM Usage"
key = "1_ram_usage"
script = "coder stat mem"
interval = 10
timeout = 1
}
metadata {
display_name = "Home Disk"
key = "3_home_disk"
script = "coder stat disk --path $${HOME}"
interval = 60
timeout = 1
}
metadata {
display_name = "CPU Usage (Host)"
key = "4_cpu_usage_host"
script = "coder stat cpu --host"
interval = 10
timeout = 1
}
metadata {
display_name = "Memory Usage (Host)"
key = "5_mem_usage_host"
script = "coder stat mem --host"
interval = 10
timeout = 1
}
metadata {
display_name = "Load Average (Host)"
key = "6_load_host"
# get load avg scaled by number of cores
script = <<EOT
echo "`cat /proc/loadavg | awk '{ print $1 }'` `nproc`" | awk '{ printf "%0.2f", $1/$2 }'
EOT
interval = 60
timeout = 1
}
metadata {
display_name = "Swap Usage (Host)"
key = "7_swap_host"
script = <<EOT
free -b | awk '/^Swap/ { printf("%.1f/%.1f", $3/1024.0/1024.0/1024.0, $2/1024.0/1024.0/1024.0) }'
EOT
interval = 10
timeout = 1
}
}
# See https://registry.coder.com/modules/coder/code-server
module "code-server" {
count = data.coder_workspace.me.start_count
folder = "/home/coder/projects"
source = "registry.coder.com/coder/code-server/coder"
settings = {
"workbench.colorTheme" : "Default Dark Modern"
}
# This ensures that the latest non-breaking version of the module gets downloaded, you can also pin the module version to prevent breaking changes in production.
version = "~> 1.0"
agent_id = coder_agent.main.id
order = 1
}
module "vscode" {
count = data.coder_workspace.me.start_count
source = "registry.coder.com/coder/vscode-desktop/coder"
version = "1.1.0"
agent_id = coder_agent.main.id
}
module "windsurf" {
count = data.coder_workspace.me.start_count
source = "registry.coder.com/coder/windsurf/coder"
version = "1.1.0"
agent_id = coder_agent.main.id
}
module "cursor" {
count = data.coder_workspace.me.start_count
source = "registry.coder.com/coder/cursor/coder"
version = "1.2.0"
agent_id = coder_agent.main.id
}
module "jetbrains_gateway" {
count = data.coder_workspace.me.start_count
source = "registry.coder.com/coder/jetbrains-gateway/coder"
# JetBrains IDEs to make available for the user to select
jetbrains_ides = ["IU", "PS", "WS", "PY", "CL", "GO", "RM", "RD", "RR"]
default = "IU"
# Default folder to open when starting a JetBrains IDE
folder = "/home/coder/projects"
# This ensures that the latest non-breaking version of the module gets downloaded, you can also pin the module version to prevent breaking changes in production.
version = "~> 1.0"
agent_id = coder_agent.main.id
agent_name = "main"
order = 2
}
resource "docker_volume" "home_volume" {
name = "coder-${data.coder_workspace.me.id}-home"
# Protect the volume from being deleted due to changes in attributes.
lifecycle {
ignore_changes = all
}
# Add labels in Docker to keep track of orphan resources.
labels {
label = "coder.owner"
value = data.coder_workspace_owner.me.name
}
labels {
label = "coder.owner_id"
value = data.coder_workspace_owner.me.id
}
labels {
label = "coder.workspace_id"
value = data.coder_workspace.me.id
}
# This field becomes outdated if the workspace is renamed but can
# be useful for debugging or cleaning out dangling volumes.
labels {
label = "coder.workspace_name_at_creation"
value = data.coder_workspace.me.name
}
}
resource "coder_app" "preview" {
agent_id = coder_agent.main.id
slug = "preview"
display_name = "Preview your app"
icon = "${data.coder_workspace.me.access_url}/emojis/1f50e.png"
url = "http://localhost:${data.coder_parameter.preview_port.value}"
share = "authenticated"
subdomain = true
open_in = "tab"
order = 0
healthcheck {
url = "http://localhost:${data.coder_parameter.preview_port.value}/"
interval = 5
threshold = 15
}
}
resource "docker_container" "workspace" {
count = data.coder_workspace.me.start_count
image = data.coder_parameter.container_image.value
# Uses lower() to avoid Docker restriction on container names.
name = "coder-${data.coder_workspace_owner.me.name}-${lower(data.coder_workspace.me.name)}"
# Hostname makes the shell more user friendly: coder@my-workspace:~$
hostname = data.coder_workspace.me.name
user = "coder"
# Use the docker gateway if the access URL is 127.0.0.1
entrypoint = ["sh", "-c", replace(coder_agent.main.init_script, "/localhost|127\\.0\\.0\\.1/", "host.docker.internal")]
env = ["CODER_AGENT_TOKEN=${coder_agent.main.token}"]
host {
host = "host.docker.internal"
ip = "host-gateway"
}
volumes {
container_path = "/home/coder"
volume_name = docker_volume.home_volume.name
read_only = false
}
# Add labels in Docker to keep track of orphan resources.
labels {
label = "coder.owner"
value = data.coder_workspace_owner.me.name
}
labels {
label = "coder.owner_id"
value = data.coder_workspace_owner.me.id
}
labels {
label = "coder.workspace_id"
value = data.coder_workspace.me.id
}
labels {
label = "coder.workspace_name"
value = data.coder_workspace.me.name
}
}

View File

@ -4,7 +4,7 @@ description: Run Claude Code in your workspace
icon: ../../../../.icons/claude.svg
maintainer_github: coder
verified: true
tags: [agent, claude-code, ai]
tags: [agent, claude-code, ai, tasks]
---
# Claude Code