Files
coder/docs/reference/api/templatebuilder.md
T
Jeremy Ruppel 10717572ac feat: show template prerequisites in builder UI (#26523)
Surface base template prerequisites to admins before they create a
template in the Template Builder wizard.

Today, template prerequisites (Docker socket setup, Kubernetes auth, AWS
IAM policies) are only visible in the registry README after import.
Admins hit opaque provisioner errors and have to hunt for docs. This
change extracts the prerequisites from the README and serves them via
the API so the frontend can display them inline.

## How it works

Each base template README uses HTML comment markers (`<!--
prerequisites:start -->` / `<!-- prerequisites:end -->`) to delimit the
prerequisites section. At boot time, the base catalog loader reads the
README, extracts the content between markers via `strings.Index`, and
caches both the full README and the prerequisites string.

The prerequisites are served via a new `prerequisites` field on `GET
/api/v2/templatebuilder/bases`. The full README is included in the
composed template tar bundle and stored as the template version readme.

## Changes

- Add `README.md` with prerequisite markers to
`coderd/templatebuilder/bases/{docker,kubernetes,aws-linux}/`
- New `ExtractPrerequisites()` in `prerequisites.go` using literal
string matching
- `bases.go`: load README at boot, fail loudly if missing, extract
prerequisites
- `compose.go`: include README in `ComposeResult` and tar bundle
- `codersdk`: add `Prerequisites` field to `TemplateBuilderBase`
- Handler: populate prerequisites in bases response, set readme on
template version

<details>
<summary>Implementation notes</summary>

- Prerequisites extraction uses `strings.Index` for exact literal marker
matching; no regex or AST parser needed since we control the markers.
- YAML frontmatter is deliberately retained in the stored README. The
frontend `TemplateDocsPage` already strips it at render time via
`front-matter`.
- The prerequisite markers are HTML comments, invisible in rendered
markdown.
- The `RejectsMissingReadme` test enforces that every base template must
include a README.
- AWS Linux prerequisites span two H2 sections (`## Prerequisites` and
`## Required permissions / policy`), which is why heading-based parsing
was rejected in favor of explicit markers.

*Generated with the assistance of an AI coding agent. Reviewed by
@jeremyruppel.*
</details>

Relates to https://linear.app/codercom/issue/DEVEX-446
2026-06-23 11:36:07 -04:00

9.0 KiB
Generated

TemplateBuilder

List template builder base templates

Code samples

# Example request using curl
curl -X GET http://coder-server:8080/api/v2/templatebuilder/bases \
  -H 'Accept: application/json' \
  -H 'Coder-Session-Token: API_KEY'

GET /api/v2/templatebuilder/bases

Example responses

200 Response

{
  "bases": [
    {
      "description": "string",
      "icon": "string",
      "id": "string",
      "name": "string",
      "os": "string",
      "prerequisites": "string",
      "variables": [
        {
          "default": [
            0
          ],
          "description": "string",
          "name": "string",
          "required": true,
          "sensitive": true,
          "type": "string"
        }
      ]
    }
  ]
}

Responses

Status Meaning Description Schema
200 OK OK codersdk.TemplateBuilderBasesResponse

To perform this operation, you must be authenticated. Learn more.

Compose template from base and modules

Code samples

# Example request using curl
curl -X POST http://coder-server:8080/api/v2/templatebuilder/compose \
  -H 'Content-Type: application/json' \
  -H 'Coder-Session-Token: API_KEY'

POST /api/v2/templatebuilder/compose

Body parameter

{
  "base_template_id": "string",
  "base_variable_values": {
    "property1": "string",
    "property2": "string"
  },
  "modules": [
    {
      "id": "string",
      "variables": {
        "property1": "string",
        "property2": "string"
      }
    }
  ]
}

Parameters

Name In Type Required Description
body body codersdk.TemplateBuilderComposeRequest true Compose request

Responses

Status Meaning Description Schema
200 OK OK

To perform this operation, you must be authenticated. Learn more.

Compose and create a template

Code samples

# Example request using curl
curl -X POST http://coder-server:8080/api/v2/templatebuilder/compose/template \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json' \
  -H 'Coder-Session-Token: API_KEY'

POST /api/v2/templatebuilder/compose/template

Body parameter

{
  "base_template_id": "string",
  "base_variable_values": {
    "property1": "string",
    "property2": "string"
  },
  "description": "string",
  "display_name": "string",
  "icon": "string",
  "modules": [
    {
      "id": "string",
      "variables": {
        "property1": "string",
        "property2": "string"
      }
    }
  ],
  "name": "string",
  "organization_id": "7c60d51f-b44e-4682-87d6-449835ea4de6",
  "provisioner_tags": {
    "property1": "string",
    "property2": "string"
  }
}

Parameters

Name In Type Required Description
body body codersdk.TemplateBuilderCreateTemplateRequest true Create template request

Example responses

201 Response

{
  "template": {
    "active_user_count": 0,
    "active_version_id": "eae64611-bd53-4a80-bb77-df1e432c0fbc",
    "activity_bump_ms": 0,
    "allow_user_autostart": true,
    "allow_user_autostop": true,
    "allow_user_cancel_workspace_jobs": true,
    "autostart_requirement": {
      "days_of_week": [
        "monday"
      ]
    },
    "autostop_requirement": {
      "days_of_week": [
        "monday"
      ],
      "weeks": 0
    },
    "build_time_stats": {
      "property1": {
        "p50": 123,
        "p95": 146
      },
      "property2": {
        "p50": 123,
        "p95": 146
      }
    },
    "cors_behavior": "simple",
    "created_at": "2019-08-24T14:15:22Z",
    "created_by_id": "9377d689-01fb-4abf-8450-3368d2c1924f",
    "created_by_name": "string",
    "default_ttl_ms": 0,
    "deleted": true,
    "deprecated": true,
    "deprecation_message": "string",
    "description": "string",
    "disable_module_cache": true,
    "display_name": "string",
    "failure_ttl_ms": 0,
    "icon": "string",
    "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
    "max_port_share_level": "owner",
    "name": "string",
    "organization_display_name": "string",
    "organization_icon": "string",
    "organization_id": "7c60d51f-b44e-4682-87d6-449835ea4de6",
    "organization_name": "string",
    "provisioner": "terraform",
    "require_active_version": true,
    "time_til_dormant_autodelete_ms": 0,
    "time_til_dormant_ms": 0,
    "updated_at": "2019-08-24T14:15:22Z",
    "use_classic_parameter_flow": true
  }
}

Responses

Status Meaning Description Schema
201 Created Created codersdk.TemplateBuilderCreateTemplateResponse
400 Bad Request Bad Request codersdk.Response
404 Not Found Not Found codersdk.Response
409 Conflict Conflict codersdk.Response
504 Gateway Time-out Gateway Timeout codersdk.Response

To perform this operation, you must be authenticated. Learn more.

List template builder modules

Code samples

# Example request using curl
curl -X GET http://coder-server:8080/api/v2/templatebuilder/modules \
  -H 'Accept: application/json' \
  -H 'Coder-Session-Token: API_KEY'

GET /api/v2/templatebuilder/modules

Parameters

Name In Type Required Description
base query string false Base template example ID for OS-compatibility filtering

Example responses

200 Response

{
  "modules": [
    {
      "category": "string",
      "compatible_os": [
        "string"
      ],
      "conflicts_with": [
        "string"
      ],
      "description": "string",
      "display_name": "string",
      "icon": "string",
      "id": "string",
      "variables": [
        {
          "default": [
            0
          ],
          "description": "string",
          "name": "string",
          "required": true,
          "sensitive": true,
          "type": "string"
        }
      ],
      "version": "string"
    }
  ]
}

Responses

Status Meaning Description Schema
200 OK OK codersdk.TemplateBuilderModulesResponse

To perform this operation, you must be authenticated. Learn more.