momentic-test Skill for Claude Code: What It Does and How to Install It

Makes Claude write, run and repair Momentic browser tests stored as *.test.yaml and *.module.yaml files.

Installs: 68.5K; on skills.sh
Stars: 16; on GitHub
Updated: Oct 2026; last repo commit

This skill teaches Claude to author and maintain Momentic end-to-end browser tests. It picks one of three paths: edit a known v2 YAML change directly, work step by step in a live browser session through Momentic MCP tools, or create a new test.

It asks before any step that could submit, purchase, delete or send. It needs a Momentic sign-in and the Momentic MCP server.

Good for

Developers who want Claude to write or fix *.test.yaml tests in a Momentic project
QA engineers keeping a Momentic browser suite readable and stable

Install momentic-test

Claude Code

Copy this prompt.

Install the momentic-test skill in Claude Code. Run this command:

/plugin marketplace add momentic-ai/skills
/plugin install momentic@momentic

Then check that it loaded and tell me how to use it.

2
Paste it into Claude Code. It shows the change and asks before running it.

Requires Node.js.

The plugin route installs all 6 skills (skills/*/SKILL.md in the repo tree) and registers the momentic and momentic-mobile MCP servers from .mcp.json. The skill edits test files and drives a browser on your machine, so there is no Claude app upload route. Sign in once with the login command in the last method, or set MOMENTIC_API_KEY.

From the project README. Source.

What's in the skill

When it loads

Create, run, and maintain Momentic browser E2E tests and modules stored as *.test.yaml and *.module.yaml files.

Sections in SKILL.md

AI Action V3
Time-sensitive interactions
Cache and memory
Readiness and timing
Test context
JavaScript
Start and fetch context
Preview -> splice -> validate
Page state and timing
Browser and host resource pressure
Targeting and assertions
Format and data

Key facts

Author: Momentic (vendor's own repo)
License: None stated: the repo has no LICENSE file and its plugin manifests list no license
Installs on skills.sh: 68,526 (Nov 2, 2026)
GitHub stars: 16 for the whole repo (Nov 2, 2026)
Last repo commit: Oct 28, 2026
Audits on skills.sh: Gen Agent Trust Hub: pass, Socket: pass, Snyk: pass
What it includes: 1 file: SKILL.md (from the repo tree)
Needs: A Momentic project with momentic.config.yaml, a Momentic sign-in, and the Momentic MCP server (npx -y momentic mcp)
Part of: The Momentic plugin: 6 skills (skills/*/SKILL.md in the repo tree) and 2 local MCP servers listed in .mcp.json
Upstream sync: The README says a bot copies most files in skills/ from an upstream source, so edits made in the repo are overwritten

What it includes

Inspect nearby tests, edit the YAML, lint if unsure, run the range
The fastest path and the one with the clearest diff, per SKILL.md. Lint is npx momentic lint.
Try: “Add a step to my checkout test that checks the order total after a coupon”
Runs code · Known v2 change
momentic_session_start, preview a checkpoint, splice it, validate, terminate
For v1 tests, unknown UI or live validation. Preview calls wait 30 seconds, then return a runner to poll with momentic_poll_runner.
Runs code · Interactive session
momentic_test_create, then author in YAML or step by step
momentic_session_start only opens an existing test.
Write · New test
Goal-based steps; cached by default, cache false for dynamic flows
Preferred for new tests. Use granular steps when a checkpoint needs control.
AI Action V3
momentic_module_recommend then momentic_module_get, then reuse or inline
Checked for flows of about four or more steps. Modules cannot contain modules, and it asks before changing a shared one.
Read · Modules
saveAs and env.NAME values; Node versus Browser JavaScript
Native steps first; JavaScript for setup, APIs and OTP.
Test context and JavaScript
Page timing, resource pressure, targeting and format errors
Includes checking host CPU and memory, and stopping to ask after about three attempts at the same failure.
Read · Troubleshooting guide
Confirm before steps that submit, purchase, delete, send or create
If approved, it runs such a step at most once.
Ask-first rule

From the official docs

Permissions

Medium risk

This skill edits your test files and clicks through your app in a real browser, which can trigger real actions. Run it against a test environment and approve each risky step.

What it can do

Read your data
Create and change things
Delete things
Read-only mode

Watch out for

It edits your test and module files
SKILL.md edits v2 YAML directly and saves other changes through momentic_test_splice_steps. It says to ask before editing a shared module. github.com
It can click through real actions in your app
SKILL.md says to ask before previewing or running any step that may submit, purchase, delete, send or create, and to run an approved one at most once. Point it at a test environment. github.com
It needs a Momentic sign-in or API key
The README says to run npx momentic login once or set MOMENTIC_API_KEY. Keep the key out of your repo. github.com
The plugin route adds two local MCP servers
The plugin route installs the repo's .mcp.json, which starts momentic and momentic-mobile with npx -y. The repo tree has no hooks. Two skills (mo-qa and momentic-spec) bundle an agents/openai.yaml that holds a display name, a short description and a default prompt. github.com
It stops after about three tries
SKILL.md says to stop and ask you for direction after about three attempts at the same failure, and never to edit v1 YAML directly. github.com

Security advisories

No published security advisories as of Nov 2, 2026.

Technical details

Turning on read-only	SKILL.md describes no read-only mode.
Talks to	static.momentic.ai (v2 format reference named in SKILL.md). momentic.ai (docs links in SKILL.md). The app you test (its base URL)
Sign-in and keys	Sign in once with npx momentic login, or set MOMENTIC_API_KEY (README). SKILL.md does not say where the login is stored.
Scopes	Reads and edits .test.yaml and .module.yaml files in your project Drives a real browser against your app through Momentic MCP tools Runs Momentic CLI commands such as npx momentic lint

Questions

What does the momentic-test skill do?

It teaches Claude to write, run and maintain Momentic browser E2E tests and modules stored as *.test.yaml and *.module.yaml. It chooses between a direct YAML edit and a live browser session that previews steps and saves them.

How do I install it?

Use the install box at the top of this page. The plugin route installs all six Momentic skills and registers the Momentic MCP servers, and npx momentic skills installs the skills from the Momentic CLI. You also need a Momentic sign-in.

Do I need a Momentic account?

It needs a Momentic sign-in. The README says to run npx momentic login once or set MOMENTIC_API_KEY.

Is it an official Momentic skill?

Yes. It lives in Momentic's own repo, momentic-ai/skills, and the plugin manifest names Momentic as author. The README says a bot copies most skill files from an upstream source, so Momentic asks outside contributors to open an issue instead of a pull request.

Is it safe?

It edits your test files and drives a real browser against your app through Momentic MCP tools. SKILL.md says to ask before any step that could submit, purchase, delete, send or create, and to run an approved one at most once. The plugin route also starts two local MCP servers with npx -y.

Does it work in Cursor or Codex?

The README documents a Cursor plugin from the Cursor Marketplace and a Devin plugin. It also says install-mcp writes the MCP server entry for Claude Code, Cursor, VS Code, Codex, Windsurf and other clients. The skill files are plain SKILL.md, so the skills CLI can install them in other agents.

How is it different from momentic-mobile-test?

momentic-test covers browser tests (fileType momentic/test/v2). momentic-mobile-test covers Android and iOS tests (fileType momentic/mobile-test/v2) and needs a device or emulator toolchain.

Which skills depend on it?

momentic-spec tells Claude to use the installed momentic-test skill for detailed authoring, format and MCP guidance, so install both together.

Information

updated Nov 2, 2026

Repository: momentic-ai/skills
Folder: skills/momentic-test

momentic-ai/skills skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 6

README · github.com
.mcp.json · github.com
marketplace.json · github.com
momentic-test SKILL.md · github.com
momentic-mobile-test/SKILL.md · github.com
momentic-spec/SKILL.md · github.com