`TemplateBuilderSession` telemetry types and telemetry-server ingestion
were added in earlier PRs (#25082, coder/coder-telemetry-server#41), but
no code ever produced session events. This adds the missing producer.
**Backend**: `POST /api/v2/templatebuilder/sessions` reports wizard
entry and compose completion events directly via
`api.Telemetry.Report()`, using the same inline pattern as
`NetworkEvents` and `UserTailnetConnections`. No database migration or
`createSnapshot()` changes needed. RBAC requires `policy.ActionCreate`
on `ResourceTemplate.AnyOrganization()`, matching the compose endpoint.
**Frontend**: The template builder wizard fires `wizard_entry` on page
mount and `compose_completion` on create success or failure. A
client-generated session ID (UUID) correlates the two events for the
same wizard visit, enabling precise funnel analysis and abandonment
detection in BigQuery. Duration is tracked via `Date.now()` in the
wizard state.
Closes https://linear.app/codercom/issue/DEVEX-599
<details>
<summary>Implementation plan</summary>
## Root Cause Analysis
The DEVEX-599 ticket diagnosis suggested missing DB tables, queries, and
`eg.Go` blocks. That diagnosis assumes the DB-backed periodic snapshot
path is required. It is not. Investigation shows two telemetry reporting
patterns in the codebase:
1. **DB-backed periodic snapshots** (`createSnapshot()` with `eg.Go`
blocks): Used for durable entities like workspaces, templates, users.
2. **Direct inline reporting**
(`api.Telemetry.Report(&telemetry.Snapshot{...})`): Used for ephemeral
events like `NetworkEvents`, `UserTailnetConnections`, `CLIInvocations`.
Template builder sessions are ephemeral events, so the direct inline
reporting pattern is the correct fit.
## Backend Changes
- `codersdk/templatebuilder.go`: `TemplateBuilderSessionRequest` type
with `SessionID`, `EventType` enum, `TemplateBuilderSession()` client
method
- `coderd/coderd.go`: Route registration in `/templatebuilder` group
- `coderd/templatebuilder_handler.go`: Handler with RBAC check, request
validation, session ID fallback, and inline telemetry report
- `coderd/templatebuilder_handler_test.go`: Tests for wizard entry,
compose completion, invalid event type, disabled feature, and member
RBAC rejection
## Frontend Changes
- `site/src/api/api.ts`: `recordTemplateBuilderSession` API method
- `site/src/api/queries/templateBuilder.ts`: React Query mutation
- `site/src/pages/TemplateBuilder/wizardState.ts`: `sessionId` and
`enteredAt` fields, `createWizardState()` factory for per-mount
initialization
- `site/src/pages/TemplateBuilder/TemplateBuilderPageView.tsx`:
`sessionId` prop, `useReducer` initializer form
- `site/src/pages/TemplateBuilder/TemplateBuilderPage.tsx`: Telemetry
calls for wizard entry (on mount) and compose completion (on create
success/failure)
</details>
> 🤖 Generated by Coder Agents
---------
Co-authored-by: Coder Agent <agent@coder.com>
## Summary
GCP base templates (`gcp-linux`, `gcp-windows`) in the Template Builder
had a Terraform `variable "project_id"` with no default, but their
`base.json` manifests didn't declare it. The UI never prompted for it,
so the provisioner import always failed with:
```
required template variables need values: project_id
```
## Changes
- Add `project_id` as a required variable in both GCP `base.json`
manifests
- Convert templates from raw Terraform variable blocks to Go template
injection (`{{ .Variables.project_id }}`), matching the existing
kubernetes pattern
- Fix `DefaultBaseRenderContext` to supply a `"REQUIRED"` placeholder
for required variables without defaults (previously rendered as `<no
value>`)
- Replace duplicate test subtests with proper GCP coverage including a
missing-variable error case
<details>
<summary>Implementation plan</summary>
### Root cause
The GCP base templates contained `variable "project_id" {}` (no default
= required) in their `.tf.tmpl` files, but the `base.json` manifests had
an empty `variables` array. The Template Builder UI
(`BaseTemplateParametersStep`) is data-driven from `base.json`, so it
never showed a field for `project_id`. The composed Terraform output
still contained the required variable, causing the provisioner import to
fail.
### Fix approach
Follow the pattern established by the kubernetes base template:
1. Declare variables in `base.json` so the UI prompts for them
2. Use Go template syntax (`{{ .Variables.project_id }}`) to inject
values at compose time
3. Remove raw Terraform `variable` blocks from the template since the
value is now baked in
### Files changed
| File | Change |
|---|---|
| `bases/gcp-linux/base.json` | Added `project_id` as a required
variable |
| `bases/gcp-windows/base.json` | Added `project_id` as a required
variable |
| `bases/gcp-linux/main.tf.tmpl` | Removed Terraform variable block, use
Go template injection |
| `bases/gcp-windows/main.tf.tmpl` | Same |
| `bases.go` | `DefaultBaseRenderContext` supplies placeholder for
required vars without defaults |
| `compose_test.go` | Replaced duplicate subtests with proper GCP tests
|
| `templatebuilder_handler_test.go` | Updated `gcp-windows` spec to
expect `project_id` variable |
| Golden files | Regenerated |
</details>
> 🤖 Generated by Coder Agents on behalf of @jeremyruppel
Makes it easier to pick the right workspace image, both in the template
builder and in the docs.
- Template builder: the Docker and Kubernetes bases now expose a
`container_image` variable in the wizard (freeform text, defaults to
`codercom/example-base:ubuntu`), and their prerequisites explain why
image choice matters, with tradeoffs between
`codercom/example-base:ubuntu` (minimal) and
`codercom/example-universal:ubuntu` (catch-all), plus pointers to
[coder/images](https://github.com/coder/images) and the image management
docs.
- Docs: reworked [image
management](https://coder.com/docs/@ben%2Fdevrel-201-image-guidance-prereqs/admin/templates/managing-templates/image-management)
into a clearer maturity ladder (minimal → golden → project-specific →
developer customization), with pullable image references in every
example, `codercom/oss-dogfood` as a project-specific example, and Dev
Containers + [mise](https://mise.jdx.dev/) as ways to customize without
new images.
Companion PR for the starter templates: coder/registry#943
Part of DEVREL-201.
🤖 Generated with Coder Agents using Claude, on behalf of @bpmct (wizard
variable by @jeremyruppel in #27024)
---------
Co-authored-by: Jeremy Ruppel <jeremyruppel@users.noreply.github.com>
Add 6 new base templates to the template builder, covering all major
cloud providers and platforms:
- **scratch**: Minimal starter template with only `coder_agent` and
metadata
- **aws-windows**: AWS EC2 Windows instances with PowerShell user_data
- **azure-linux**: Azure VMs with cloud-init and managed disk
persistence
- **gcp-linux**: Google Compute Engine Linux instances with persistent
disk
- **gcp-windows**: Google Compute Engine Windows instances
- **digitalocean-linux**: DigitalOcean Linux droplets with persistent
volumes
Each base includes `base.json`, `main.tf.tmpl`, `README.md` (with
prerequisite markers), and any static files (cloud-init configs). Tests
verify all 9 bases load, render without error, and produce valid
single-agent declarations.
`azure-windows` is deferred; it needs to be registered in the `examples`
package first.
Depends on #26633
> [!NOTE]
> This PR was authored by Coder Agents on behalf of @jeremyruppel.
---
NB: This is very much an agent-generated PR and draws completely from
base templates that exist in `examples/templates/`. The base.json files
are new, so review those, but don't spend any brain tokens on the
correctness of the terraform and supporting files: any issues there are
issues with the upstream example template
Implement `GET /api/v2/templatebuilder/modules`, which returns the
filtered list of modules available for a given base template. Reads from
the bundled catalog via `LoadModules()` and applies OS-compatibility
filtering based on the `base` query param.
Computed variables (e.g. `agent_id`) are excluded from the API response
at the `ToSDK()` conversion boundary since they are wired automatically
by the builder. The `Computed` field is removed from the SDK type. Adds
`CompatibleWithOS()` to `ModuleManifest` for OS filtering.
Returns 400 for unknown base IDs and 404 when the template builder is
disabled.
Depends on #26116
> [!NOTE]
> This PR was authored by Coder Agents on behalf of @jeremyruppel.
Implement `GET /api/v2/templatebuilder/bases`, which returns the list of
base templates available in the template builder. Reads from the bundled
catalog by cross-referencing `templatebuilder.BaseTemplateIDs()` with
`examples.List()`, enriching each entry with the OS from the `exampleID
-> OS` map.
The endpoint is gated behind the template builder feature flag (returns
404 when disabled) and requires `policy.ActionRead` on
`rbac.ResourceTemplate`.
Depends on #26115
> [!NOTE]
> This PR was authored by Coder Agents on behalf of @jeremyruppel.
