argent-lens skill: your agent builds several UI variants on a simulator and you pick one in a preview window

• Decides which elements to redesign and what each variant is

  Writes the list first, such as Search field: Filled, Outlined, Pill. Each variant is one self-contained change.

  Try: “Give me three design options for the search field and two for the main button on the home screen.”

  Read · Step 0: plan the variants

• Reads the element's label or identifier from the screen

  Runs describe, or the React Native component tree, so the preview window anchors the card to the right element.

  Read · Step 1: get a precise matcher

• Edits code, reloads the app, screenshots, stages each variant

  For every variant the agent edits your code, reloads the React Native bundle or rebuilds, drives the app to the screen, takes a screenshot and calls propose_variant, then reverts the change. It must not crop or copy the screenshot.

  Runs code · Step 2: build, navigate, screenshot, propose

• Stages one variant for one element, without blocking

  Takes the element name, an optional matcher, the device id (udid) and the variant with name, summary and a preview image. Each element needs at least two variants.

  Write · propose_variant

• Waits once for you to pick in the Argent Lens window

  Returns your choices, unselected elements, pinned comments and a global comment. If it times out it returns pending and the agent waits again.

  Read · await_user_selection

• Implements the chosen variants and acts on your comments

  The agent applies each chosen variant, addresses every comment, and reports what it applied and skipped.

  Write · Step 4: apply the outcome

• Run argent enable argent-lens once

  SKILL.md says the workflow is off by default. If the tools come back not found, the flag is off.

  Runs code · Feature flag

Watch out for

• argent init changes your editor setup

  Per the installer source, init writes an MCP server entry into the config of each editor you choose, offers a tool auto-approval (allowlist) step, installs every Argent skill with npx skills, and copies rules and agents into the project or home folder. Decline auto-approval if you want to confirm each tool call, and check git status afterwards. github.com

• It changes your code repeatedly

  For every variant the agent edits code, rebuilds, screenshots and rolls the change back. If a run stops half way, a variant may be left in your files. Use a branch and check git status.

• It controls a simulator or device

  The Argent toolkit taps, types and navigates the device the agent uses. Point it at a simulator or test device, not one with personal accounts.

• Argent collects telemetry by default

  The privacy notice says telemetry is on by default and lists tool usage, install progress and environment data, not source code or file paths. Turn it off with argent telemetry disable.

• Mixed licence

  Source code is Apache-2.0 but the bundled binaries are proprietary. Read the README licence section.