Rowan Smith 77522c3945 feat: cli: add support for supplying ephemeral parameters at workspace creation (#26012)
Resolves the issue of `--prompt-ephemeral-parameters` and
`--ephemeral-parameter` not being available for use in the `coder
create` workspace creation command (they are only available in `coder
start` command). Back when they were [added
originally](https://github.com/coder/coder/pull/15030) it seems to have
been an oversight that they were left out.

The problem this solves:

```
coder create --parameter my_ephemeral_parameter=foo
error: prepare build: ephemeral parameter "my_ephemeral_parameter" can be used only with --prompt-ephemeral-parameters or --ephemeral-parameter flag
```

```
coder create my-test-ws -t general --ephemeral-parameter my_ephemeral_parameter=foo
parsing flags ([create my-test-ws -t general --ephemeral-parameter my_ephemeral_parameter=foo]) for "coder create": unknown flag: --ephemeral-parameter
```

Tested on a template with the following:

```
data "coder_parameter" "my_ephemeral_parameter" {
  name         = "my_ephemeral_parameter"
  type         = "bool"
  description  = "true or false?"
  mutable      = true
  default      = false
  ephemeral    = true
}

resource "coder_env" "debug_ephemeral" {
  agent_id = coder_agent.main.id
  name     = "EPHEMERAL_TEST"
  value    = data.coder_parameter.my_ephemeral_parameter.value
}
```

By running:

```
➜  coder git:(rowan/coder-create-5495) ✗ go run cmd/coder/main.go create --ephemeral-parameter my_ephemeral_parameter=true
> Specify a name for your workspace: ws4
Select a template below to preview the provisioned infrastructure:
?  kasmvnc-ubuntu-coder-dev used by 1 active developer
Select a preset below:
?  Small (2 CPU / 4 GB)
....
...
The ws4 workspace has been created at Jun  3 12:36:38!

➜  coder git:(rowan/coder-create-5495) ✗ coder ssh ws4               
workspace-ws4-5d6994756f-qlwnl% echo $EPHEMERAL_TEST
true
workspace-ws4-5d6994756f-qlwnl% exit
```
2026-06-11 09:06:07 +10:00
2022-04-04 11:55:06 -05:00

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Coder is a self-hosted platform for cloud development environments and AI coding agents. Workspaces are defined with Terraform, connected through a secure Wireguard® tunnel, and automatically shut down when not used. Coder Agents runs a native AI coding agent whose loop executes in the control plane on your infrastructure, with no API keys in workspaces.

  • Define cloud development environments in Terraform
    • EC2 VMs, Kubernetes Pods, Docker Containers, etc.
  • Automatically shutdown idle resources to save on costs
  • Onboard developers in seconds instead of days
  • Delegate coding work to AI agents on your infrastructure
    • Bring any model (Anthropic, OpenAI, Google, Bedrock, self-hosted)
    • No LLM credentials in workspaces, user identity on every action
    • Centralized model governance, cost tracking, and audit logging

Coder platform showing templates and a running workspace

Quickstart

The most convenient way to try Coder is to install it on your local machine and experiment with provisioning cloud development environments using Docker (works on Linux, macOS, and Windows).

# First, install Coder
curl -L https://coder.com/install.sh | sh

# Start the Coder server (caches data in ~/.cache/coder)
coder server

# Navigate to http://localhost:3000 to create your initial user,
# create a Docker template and provision a workspace

Install

The easiest way to install Coder is to use the install script for Linux and macOS. For Windows, use the latest ..._installer.exe file from GitHub Releases.

curl -L https://coder.com/install.sh | sh

You can run the install script with --dry-run to see the commands that will be used to install without executing them. Run the install script with --help for additional flags.

See install for additional methods.

Once installed, you can start a production deployment with a single command:

# Automatically sets up an external access URL on *.try.coder.app
coder server

# Requires a PostgreSQL instance (version 13 or higher) and external access URL
coder server --postgres-url <url> --access-url <url>

Use coder --help to get a list of flags and environment variables. See the install guides for a complete tutorial.

Documentation

Browse the documentation or visit a specific section below:

  • Workspaces: Workspaces contain the IDEs, dependencies, and configuration information needed for software development
  • Templates: Templates are written in Terraform and describe the infrastructure for workspaces
  • Coder Agents: Delegate coding work to AI agents running on your self-hosted infrastructure
  • Administration: Learn how to operate Coder
  • Premium: Learn about paid features built for large teams
  • IDEs: Connect your existing editor to a workspace

Support

Feel free to open an issue if you have questions, run into bugs, or have a feature request.

Join our Discord to provide feedback on in-progress features and chat with the community using Coder!

Integrations

New integrations are always in progress. Open an issue to request one. Contributions are welcome in any official or community repository.

Official

Community

Contributing

New contributors are always welcome. If you are new to the Coder codebase, see the contribution guide to get started.

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