git:20260527.14c2ed0 to v1.0.0

---

name: arthur-onboard-platform

description: Onboard an agentic application to the Arthur SaaS Platform (platform.arthur.ai). Guides through authentication, workspace selection, engine deployment, model creation, code instrumentation, trace verification, and eval configuration.

allowed-tools: Bash, Read, Write, Edit, Task, Skill

---

# Onboard to Arthur Platform

You are guiding the user through the complete Arthur Platform onboarding workflow. Work through each step in order. Be conversational — ask the user before making changes to their code or configuration.

**Target repository:** The current working directory, unless the user specifies a different path.

---

## State File

Persist all state to `.arthur-engine.env` in the root of the target repository. This file is per-project and should be gitignored.

**Before starting:** Read the state file:

```bash

cat .arthur-engine.env 2>/dev/null || echo "(no state file)"

```

Parse existing values for `ARTHUR_PLATFORM_URL`, `ARTHUR_ENGINE_URL`, `ARTHUR_API_KEY`, `ARTHUR_TASK_ID`.

If `ARTHUR_ENGINE_URL`, `ARTHUR_API_KEY`, and `ARTHUR_TASK_ID` all exist, display them and ask:

> "Found existing Arthur Platform configuration. Continue with these settings, or start fresh?"

**Writing state:** Use this pattern to update individual values without clobbering others:

```bash

STATE_FILE=".arthur-engine.env"

grep -v '^ARTHUR_PLATFORM_URL=' "$STATE_FILE" 2>/dev/null > /tmp/ae_env_tmp && mv /tmp/ae_env_tmp "$STATE_FILE" || true

echo 'ARTHUR_PLATFORM_URL=https://platform.arthur.ai' >> "$STATE_FILE"

```

Also ensure the file is gitignored:

```bash

grep -qxF '.arthur-engine.env' .gitignore 2>/dev/null || echo '.arthur-engine.env' >> .gitignore

```

---

## Step 1/13 — Pre-flight Checks + Identify Platform

Check git status in the target repo:

```bash

git status --porcelain

```

- Unstaged/untracked changes → warn the user (do NOT block — staged changes are fine)

- Not a git repo → note it but continue

Skip Claude Code auth check — the user is already authenticated (they are talking to you right now).

**Identify Arthur Platform URL:** Ask the user:

> "Are you onboarding to the Arthur SaaS Platform at **https://platform.arthur.ai**?

> Or do you have a self-hosted Arthur Platform at a different URL?"

Default to `https://platform.arthur.ai` if the user confirms. Save `ARTHUR_PLATFORM_URL` to state.

Verify the platform is reachable:

```bash

HTTP_STATUS=$(curl -s -o /dev/null -w "%{http_code}" \

"${ARTHUR_PLATFORM_URL}/api/v1/auth/oidc/.well-known/openid-configuration" 2>/dev/null || echo "000")

echo "PLATFORM_REACHABLE=$HTTP_STATUS"

```

- `200` → proceed

- anything else → warn the user ("Platform not reachable at <ARTHUR_PLATFORM_URL>"); ask to check the URL or network before continuing

---

## Steps 2–7: Platform Sub-skills

Each step is handled by a dedicated sub-skill. Invoke them in sequence using the Skill tool. Each sub-skill reads its inputs from `.arthur-engine.env` and writes its outputs back to the same file.

**Invoke in order:**

1. **Step 2** — `arthur-onboard-platform-access`

Guides service account creation, collects credentials, acquires an OAuth2 token.

Establishes `ARTHUR_PLATFORM_CLIENT_ID` and `ARTHUR_PLATFORM_TOKEN` in state.

2. **Step 3** — `arthur-onboard-platform-workspace`

Lists or creates a workspace.

Establishes `ARTHUR_PLATFORM_WORKSPACE_ID` and `ARTHUR_PLATFORM_WORKSPACE_NAME` in state.

3. **Step 4** — `arthur-onboard-platform-engine`

Lists registered engines (data planes) or deploys a new one (Docker Compose, CloudFormation, or Kubernetes).

Establishes `ARTHUR_PLATFORM_ENGINE_ID` and `ARTHUR_PLATFORM_ENGINE_URL` in state.

4. **Step 5–7** — `arthur-onboard-platform-model`

Gates on application type (Agentic only continues; ML/GenAI models are routed to the platform UI).

Creates a Project and Agentic Model on the platform, then retrieves task connection info.

Establishes `ARTHUR_PLATFORM_PROJECT_ID`, `ARTHUR_PLATFORM_MODEL_ID`, `ARTHUR_ENGINE_URL`, `ARTHUR_API_KEY`, and `ARTHUR_TASK_ID` in state.

---

## Steps 8–13: Reused Sub-skills

After the platform setup is complete, the remaining steps are identical to the OSS onboarding flow. Each sub-skill reads `ARTHUR_ENGINE_URL`, `ARTHUR_API_KEY`, and `ARTHUR_TASK_ID` from state — exactly as set by `arthur-onboard-platform-model`.

**Invoke in order:**

5. **Step 8** — `arthur-onboard-analyze`

Analyzes the target repository for language, framework, and existing instrumentation.

Writes `ARTHUR_DETECTED_LANGUAGE`, `ARTHUR_DETECTED_FRAMEWORK`, `ARTHUR_IS_INSTRUMENTED` to state.

6. **Step 9** — `arthur-onboard-instrument`

Instruments the application code (Python arthur-sdk, Mastra TypeScript, or OpenInference/OTel).

7. **Step 10** — `arthur-onboard-prompts`

Extracts prompt definitions from the repo and registers them with Arthur Engine.

8. **Step 11** — `arthur-onboard-verify`

Asks the user to run the app, then polls for traces to confirm instrumentation is working.

9. **Step 12** — `arthur-onboard-eval-provider`

Configures an LLM model provider for continuous evals.

Writes `ARTHUR_EVAL_PROVIDER` and `ARTHUR_EVAL_MODEL` to state.

10. **Step 13** — `arthur-onboard-evals`

Recommends and creates continuous LLM evals for the task.

> **Sub-skill not found?** If a sub-skill is not installed, its step instructions appear in the

> system's available-skills list. If missing entirely, ask the user to install all `arthur-onboard-*`

> and `arthur-onboard-platform-*` skills alongside this one (see README.md for install commands).

---

## Step 13/13 — Done

After all sub-skills complete, read the final state:

```bash

cat .arthur-engine.env 2>/dev/null

```

Provide a completion summary:

```

Onboarding complete!

Arthur Platform: <ARTHUR_PLATFORM_URL>

Workspace: <ARTHUR_PLATFORM_WORKSPACE_NAME> (<ARTHUR_PLATFORM_WORKSPACE_ID>)

Engine: <ARTHUR_PLATFORM_ENGINE_ID>

Engine URL: <ARTHUR_ENGINE_URL>

Model: <ARTHUR_PLATFORM_MODEL_ID>

Task: <ARTHUR_TASK_ID>

Continuous evals: <N> monitoring your application

Next: Run your application with the Arthur env vars set to start seeing traces and

eval scores in the Arthur Platform UI at <ARTHUR_PLATFORM_URL>.

```

Note any steps that were skipped or require manual follow-up (e.g., model provider configuration not set, prompts not registered, trace verification pending).