Authoring a MetaMask controller: BaseController or not, state metadata (`persist`, `anonymous`, `usedInUi`), `this.update`, the options-bag constructor, typed messenger actions. Use when writing or reviewing a controller, or changing what it persists or exposes to the UI. To wire one in, see `controller-integration`.
Scanned 9/7/2026
Install to Claude Code
Skills Directorynpx -y skills add jiayaoqijia/cryptoskill --skill metamask-official-controller-guidelines --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: controller-guidelines
description: >
Authoring a MetaMask controller: BaseController or not, state metadata (`persist`,
`anonymous`, `usedInUi`), `this.update`, the options-bag constructor, typed messenger
actions. Use when writing or reviewing a controller, or changing what it persists or exposes
to the UI. To wire one in, see `controller-integration`.
base: true
---
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