/ensure-pipelines-host

name: ensure-pipelines-host
description: >-
  Ensures the tenant has a usable Power Platform Pipelines host environment
  before any pipeline operation runs. Detects host state via the same
  resolution order as the Power Apps UI (org-db setting → BAP env metadata →
  default-custom-host setting); if any existing host (Platform or Custom) is
  found, uses it. If no host is bound to the source env, provisions a new
  **Platform Host** (recommended, idempotent) or a **Custom Host** via the
  BAP env-create API with the `D365_ProjectHost` template, or guides the user
  through PPAC install / `New custom host` (manual fallbacks). Polls
  lifecycle operations, verifies the host responds to Pipelines API calls,
  writes a host-check artifact other ALM skills consume. Use when asked to:
  "set up pipelines host", "ensure pipelines host", "no pipelines host",
  "install pipelines", "create pipelines host", "provision platform host",
  "provision custom host". Also invoked transparently by
  /power-pages:setup-pipeline when its host discovery step finds nothing.
user-invocable: true
argument-hint: "Optional: 'detect-only' to skip provisioning paths and report state; 'auto-platform' to run the Platform-Host fast-path (idempotent, ~3–5 min) without the path-decision prompt (still gated by tenant pre-call confirmation); 'auto-custom' to run the Custom-Host fast-path without the path-decision prompt (still gated by tenant + admin-role + pre-call-echo prompts)"
allowed-tools: Read, Write, Edit, Bash, Glob, Grep, TaskCreate, TaskUpdate, TaskList, AskUserQuestion, mcp__plugin_power-pages_microsoft-learn__microsoft_docs_search, mcp__plugin_power-pages_microsoft-learn__microsoft_docs_fetch
model: opus

> **Plugin check**: Run `node "${PLUGIN_ROOT}/scripts/check-version.js"` — if it outputs a message, show it to the user before proceeding.

<!-- alm-lint-ignore: SKILL-must-read-manifest — this skill manages the Pipelines host environment (deploymentenvironments / deploymentpipelines tables on the host), not the source-env solution. The site's .solution-manifest.json is irrelevant to host lifecycle: a host can be provisioned before any solution exists, and a single host is shared across many solutions. ALM-aware-by-default does not apply. -->

ensure-pipelines-host

> **Scope:** When no host is bound to the source env, this skill detects any existing host (Custom or PE) for reuse, or — in `NoHost` state — offers three provisioning paths: a new **Platform Host** (recommended; idempotent, ~3–5 min); a new **Custom Host** (admin-only, ~5–10 min); or PPAC manual provisioning (fallback). Implementation details — endpoint names, template names, BAP audience — live in Phase 4.0 / 4.A / 4.C below; user-facing prose stays focused on outcomes.

Power Platform Pipelines need a **host environment** — a Dataverse environment with the *Power Platform Pipelines* managed solution installed, where pipelines, stages, run history, and artifacts live. The existing `setup-pipeline` and `deploy-pipeline` skills assume a host is already configured. This skill closes that gap.

What we know (sources of truth)

This plan is grounded in three primary sources, in priority order:

1. **`useGetOrCreatePlatformEnvironment.v4.ts`** (Microsoft-internal client source — `power-platform-ux/packages/powerapps-appdeployment-ux/src/hooks/v4/`). Defines the exact HTTP contract for Platform Environment provisioning: endpoint, body, headers, polling. 2. **`ProjectHostProvider.tsx`** (same repo, `src/components/ProjectHostProvider/`). Defines the exact resolution order the Power Apps UI uses to determine which environment is the project host for a source environment. We mirror that order so this skill agrees with the UI. 3. **eng.ms `createcustompipelineshost`** (Microsoft-internal). Documents the Custom Host fast-path: a `D365_ProjectHost` org template that ships the Pipelines app pre-installed, callable through the standard environment-creation API.

Public Microsoft Learn (`learn.microsoft.com/power-platform/alm/{platform-host-pipelines, custom-host-pipelines, set-a-default-pipelines-host}`) is the user-facing description of the same flows; we cite it for behaviors users will recognize. HARs in `PipelinesDeployScenario.har` and `Pipelines.har` confirm the read-side calls.

Three host shapes the tenant can be in

| Shape | How it got there | Where it lives | Org template | |---|---|---|---| | **Platform Host (PE)** | Auto-provisioned by `getOrCreate` BAP call (or as a side-effect of first navigation to the Pipelines page in `make.powerapps.com`). Hidden from the env picker. One per tenant. | Microsoft-managed Dataverse env in tenant's home geo | `D365_1stPartyAdminApps` | | **Custom Host** | Created by an admin via PPAC `Deployments → New custom host`, or via the standard env-create API with the `D365_ProjectHost` template, or by installing the Power Platform Pipelines app on an existing Dataverse env. | A regular Dataverse env in the tenant | `D365_ProjectHost` (or app-installed-onto-existing-env) | | **No host bound to source env** | Tenant has not used Pipelines from this env. | — | — |

The current `discover-pipelines-host.js` only checks the tenant-level `DefaultCustomPipelinesHostEnvForTenant` setting. That's one signal of many. This skill implements the full resolution order.

Resolution order (mirrors `ProjectHostProvider.tsx`)

This is the load-bearing decision tree. It is what the Power Apps UI does. We replicate it so the skill agrees with the UI.

┌─────────────────────────────────────────────────────────────────────┐
│ 1. GetOrgDbOrgSetting('ProjectHostEnvironmentId') on source env     │
└──────────────────────────┬──────────────────────────────────────────┘
                           │
            ┌──────────────┴───────────────┐
            │ value present                │ value empty
            ▼                              ▼
┌───────────────────────┐         ┌────────────────────────────┐
│ 2. Resolve env