feat: Add snaps-sandbox package and integrate into CLI

[Mrtenz]

This adds a new package, @metamask/snaps-sandbox, which is a tool to interact with Snaps through a web app. It's a replacement for the Snaps Simulator, but doesn't simulate any functionality. Instead, it calls MetaMask through the usual JSON-RPC methods.

The sandbox can be used from the Snaps CLI by running mm-snap sandbox.

[Mrtenz]

This source map doesn't exist, and Vite was complaining about it.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​vitest/​coverage-istanbul@​3.0.8 ⏵ 3.1.1
	@​types/​express@​5.0.1
	@​types/​debug@​4.1.7 ⏵ 4.1.12			-2
	agent-base@​7.1.1 ⏵ 7.1.3	+1		+1
	https-proxy-agent@​7.0.4 ⏵ 7.0.6	+1		+1
	@​monaco-editor/​react@​4.7.0
	react-icons@​5.5.0
	react@​19.1.0
	@​emotion/​react@​11.14.0
	pirates@​4.0.6 ⏵ 4.0.7	+1		+2
	@​tanstack/​react-query@​5.74.4
	happy-dom@​17.4.4
	@​testing-library/​jest-dom@​6.6.3
	react-dom@​18.3.1 ⏵ 19.1.0	+1		+1
	jotai@​2.12.3
	@​testing-library/​react@​16.3.0
	@​vitejs/​plugin-react@​4.4.1
	@​chakra-ui/​react@​3.16.1

View full report

[socket-security]

Caution

Review the following alerts detected in dependencies.

According to your organization's Security Policy, you must resolve all "Block" alerts before proceeding. Learn more about Socket for GitHub.

Action	Severity	Alert (click for details)
Block		router@2.2.0 has a New author. New Author: ulisesgascon Previous Author: wesleytodd Source ℹ Read more on: This package | This alert | What is new author? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Scrutinize new collaborator additions to packages because they now have the ability to publish code into your dependency tree. Packages should avoid frequent or unnecessary additions or changes to publishing rights. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/router@2.2.0. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

Ignoring alerts on:

• negotiator@1.0.0
• accepts@2.0.0
• content-disposition@1.0.0
• monaco-editor@0.52.2
• happy-dom@17.4.4
• mime-types@3.0.1
• type-is@2.0.1

View full report

[Mrtenz]

@SocketSecurity ignore npm/package-manager-detector@0.1.2

False positive.

@SocketSecurity ignore npm/mz@2.7.0
@SocketSecurity ignore npm/node-eval@2.0.0
@SocketSecurity ignore npm/negotiator@1.0.0
@SocketSecurity ignore npm/accepts@2.0.0
@SocketSecurity ignore npm/content-disposition@1.0.0
@SocketSecurity ignore npm/happy-dom@17.4.4
@SocketSecurity ignore npm/type-is@2.0.1
@SocketSecurity ignore npm/@chakra-ui/cli@3.15.1
@SocketSecurity ignore npm/monaco-editor@0.52.2

These seem fine.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.03%. Comparing base (18e4993) to head (d7ce527).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3306      +/-   ##
==========================================
+ Coverage   97.80%   98.03%   +0.23%     
==========================================
  Files         364      402      +38     
  Lines        9911    11111    +1200     
  Branches     1616     1754     +138     
==========================================
+ Hits         9693    10893    +1200     
  Misses        218      218              

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[Mrtenz]

@SocketSecurity ignore mime-types@3.0.1

New author is ok.

[GuillaumeRx]

Small nit otherwise LGTM

[GuillaumeRx]

No alias for this one ?

[Mrtenz]

s was already taken, and I'm not sure what else to use 😅 And in general I don't think we really need it.

[Montoya]

x?