muggle-browser-task

name	muggle-browser-task
description	Run a browser automation task on a website using natural language. Finds or creates the Muggle Test project, use case, test case, and script, then executes locally via the electron app. Use when the user wants to perform an action on a website (post, fill a form, click through a flow) rather than implement a code change.

Muggle Test Task Runner

Telemetry first step: see _shared/telemetry-emit.md. Use skillName: "muggle-do-task".

Runs a browser automation task described in plain English. Finds or creates the necessary Muggle Test entities automatically, then executes locally with mutation-driven step prediction.

Step 1 — Parse the prompt

From $ARGUMENTS, extract:

• domain — the target website domain (e.g., x.com, amazon.com, localhost:3000). Normalize: strip www., strip https://, lowercase. Result: bare domain with no scheme, no trailing slash.

• useCaseName — the core action being performed, stripped of variable content (e.g., "Publish a post", "Add to cart", "Submit a form").

• mutations — variable parameters as a string[] (JSON array of strings). Each string is either:

  • A plain-English instruction describing what varies this run (e.g., "The post content should be 'Hello world'")
  • A local file path for uploads (e.g., "Attach the image at C:\\Users\\stan4\\Pictures\\photo.jpg")

  Examples: ["The post content should be 'Hello world'"], ["Attach the image at C:\\Users\\stan4\\photo.jpg", "Caption should be 'My photo'"]

• localUrl — the full URL to test against (e.g., https://x.com, http://localhost:3000). For external sites, use https://<domain>. For local dev servers, use the port the user's app is running on.

If the prompt is ambiguous and you cannot confidently extract these, ask one clarifying question before proceeding.

Step 2 — Find or create Project

Load and call muggle-remote-project-list. Find a project whose URL contains domain (case-insensitive substring match).

If found: use it. Tell the user: Found project: <name>.

If not found: call muggle-remote-project-create with:

• projectName: <domain>
• description: E2E acceptance testing project for <domain>
• url: https://<domain>

Tell the user: Created project: <name>.

Step 3 — Find or create Use Case

Load and call muggle-remote-use-case-list filtered by projectId. Fuzzy-match against useCaseName:

• Case-insensitive
• Strip punctuation
• Match if either string is a substring of the other

If multiple candidates, pick the closest and tell the user which was selected.

If not found: call muggle-remote-use-case-create-from-prompts with:

• projectId: from Step 2
• instructions: ["<original prompt>"]

Use the first result. Capture its id as useCaseId. If the result is empty or the call fails, stop and tell the user: "Could not create use case — try rephrasing the task description."

Tell the user: Created use case: <title>.

Step 4 — Find or create Test Case

Load and call muggle-remote-test-case-list-by-use-case with useCaseId. Filter for test cases where status equals ACTIVE.

If not found: call muggle-remote-test-case-create with:

• projectId: from Step 2
• useCaseId: from Step 3
• title: <useCaseName>
• description: Test case for: <original prompt>
• goal: Successfully complete: <useCaseName>
• expectedResult: The action completes without error
• url: https://<domain>

Tell the user: Created test case: <id>.

Step 5 — Find active Test Script

Load and call muggle-remote-test-script-list with:

• projectId: from Step 2
• testCaseId: from Step 4

Tell the user which mutations will be applied: Mutations: <mutations[]> (or "no mutations" if empty).

Filter for scripts where status equals ACTIVE or PUBLISHED. If all returned scripts have another status (DRAFT, GENERATION_PENDING, FAILED), treat as "no active script" and proceed to Phase 1.

---

Phase 1 — No active script: generate locally

1. Load and call muggle-remote-test-case-get with the test case ID from Step 4. This returns the full test case object needed by the local execution tool.

2. Load and call muggle-local-execute-test-generation with:

   • testCase: the full object from step 1 above
   • localUrl: from Step 1
   • mutations: the mutations[] array from Step 1 (omit if empty)

3. Tell the user:

Script generation is running in the Muggle Test window. Once complete, run /muggle-do "<original prompt>" again to execute the task.

Do not proceed further.

---

Phase 2 — Active script found: replay with mutations

Step 6 — Fetch Action Script

1. Load and call muggle-remote-test-script-get with the script ID from Step 5. Extract actionScriptId. If actionScriptId is missing or null, stop and tell the user: "The script record is incomplete — it may still be generating. Try again in a moment."

2. Load and call muggle-remote-action-script-get with actionScriptId.

Tell the user: Executing task...

Step 7 — Execute locally

Load and call muggle-local-execute-replay with:

• testScript: the full object from Step 6 (from muggle-remote-test-script-get)
• actionScript: the content from Step 6 (from muggle-remote-action-script-get)
• localUrl: from Step 1
• mutations: the mutations[] array from Step 1 (omit if empty)

Tell the user:

Running [useCaseName] on [domain]. Watch the Muggle Test window — it will execute the task with your parameters applied.

Step 8 — Route failures through the failure-mode handler

If Phase 1 generation or Phase 2 replay returns failed or any non-passing terminal state, follow _shared/failure-mode-handling.md:

• Phase 1 (generation) failure → section C (buckets: transient / infra / agent-course / product-uxux).
• Phase 2 (replay) failure → section B (buckets: infra / stale-script / product-defect).

Steps:

1. Read the run via muggle-local-run-result-get and extract signals per the heuristics in the shared doc.
2. Emit regen-failure-classified or replay-failure-classified via muggle-local-telemetry-event-emit before asking the user.
3. Present the recommended action via AskUserQuestion with the alternatives the shared doc lists for that bucket.
4. After the user picks, emit the matching *-resolved event with userAction.

If the user picks muggle-feedback from any bucket's options, invoke the muggle-feedback skill via the Skill tool with the runId. Skip silently on clean success.