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docs: move customizations from admin to user guide
Centralizes the customization documentation in the user guide where users are more likely to find it. The admin docs now link to the user guide instead of duplicating content.
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‎docs/admin/templates/extending-templates/devcontainers.md‎

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@@ -142,73 +142,17 @@ always auto-start regardless of this setting.
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## Per-Container Customizations
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Individual Dev Containers can be customized using the `customizations.coder` block
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in your `devcontainer.json` file. These customizations allow you to control
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container-specific behavior without modifying your template.
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### Ignore Specific Containers
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Use the `ignore` option to hide a Dev Container from Coder completely:
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```json
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{
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"name": "My Dev Container",
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"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
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"customizations": {
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"coder": {
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"ignore": true
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}
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}
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}
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```
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When `ignore` is set to `true`:
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- The Dev Container won't appear in the Coder UI
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- Coder won't manage or monitor the container
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This is useful when you have Dev Containers in your repository that you don't
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want Coder to manage.
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### Per-Container Auto-Start
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Control whether individual Dev Containers should auto-start using the
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`autoStart` option:
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```json
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{
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"name": "My Dev Container",
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"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
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"customizations": {
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"coder": {
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"autoStart": true
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}
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}
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}
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```
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**Important**: The `autoStart` option only applies when global auto-start is
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enabled via `CODER_AGENT_DEVCONTAINERS_DISCOVERY_AUTOSTART_ENABLE=true`. If
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the global setting is disabled, containers won't auto-start regardless of this
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setting.
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When `autoStart` is set to `true`:
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- The Dev Container automatically builds and starts during workspace
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initialization
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- Works on a per-container basis (you can enable it for some containers but not
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others)
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When `autoStart` is set to `false` or omitted:
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- The Dev Container is discovered and shown in the UI
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- Users must manually start it via the UI
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Developers can customize individual dev containers using the `customizations.coder`
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block in their `devcontainer.json` file. Available options include:
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### Additional customizations
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- `ignore` — Hide a dev container from Coder completely
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- `autoStart` — Control whether the container starts automatically (requires
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`CODER_AGENT_DEVCONTAINERS_DISCOVERY_AUTOSTART_ENABLE` to be enabled)
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- `name` — Set a custom agent name
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- `displayApps` — Control which built-in apps appear
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- `apps` — Define custom applications
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Developers can further customize their dev containers with custom agent names,
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display apps, custom applications, and more. See
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[Customizing dev containers](../../../user-guides/devcontainers/customizing-dev-containers.md)
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See [Customizing dev containers](../../../user-guides/devcontainers/customizing-dev-containers.md)
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for the full reference.
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## Complete Template Example

‎docs/user-guides/devcontainers/customizing-dev-containers.md‎

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`customizations.coder` block. These options let you control how Coder interacts
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with your dev container without requiring template changes.
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## Ignore a dev container
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Use the `ignore` option to hide a dev container from Coder completely:
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```json
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{
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"name": "My Dev Container",
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"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
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"customizations": {
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"coder": {
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"ignore": true
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}
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}
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}
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```
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When `ignore` is set to `true`:
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- The dev container won't appear in the Coder UI
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- Coder won't manage or monitor the container
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This is useful for dev containers in your repository that you don't want Coder
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to manage.
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## Auto-start
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Control whether your dev container should auto-start using the `autoStart`
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option:
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```json
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{
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"name": "My Dev Container",
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"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
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"customizations": {
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"coder": {
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"autoStart": true
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}
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}
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}
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```
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When `autoStart` is set to `true`, the dev container automatically builds and
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starts during workspace initialization.
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When `autoStart` is set to `false` or omitted, the dev container is discovered
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and shown in the UI, but users must manually start it.
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> [!NOTE]
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>
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> The `autoStart` option only takes effect when your template administrator has
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> enabled `CODER_AGENT_DEVCONTAINERS_DISCOVERY_AUTOSTART_ENABLE`. If this
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> setting is disabled at the template level, containers won't auto-start
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> regardless of this option.
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## Custom agent name
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Each dev container gets an agent name derived from the workspace folder path by
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Health check properties:
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| Property | Type | Description |
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|-------------|--------|--------------------------------------------------|
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| `url` | string | URL to check for health status |
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| `interval` | number | Seconds between health checks |
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| `threshold` | number | Number of failures before marking app unhealthy |
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| Property | Type | Description |
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|-------------|--------|-------------------------------------------------|
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| `url` | string | URL to check for health status |
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| `interval` | number | Seconds between health checks |
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| `threshold` | number | Number of failures before marking app unhealthy |
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## Variable interpolation
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