install-mfw
Skill from semgrep/mcp-marketplace
Install
npx skills add semgrep/mcp-marketplace --skill install-mfw
Runs the open skills CLI and installs the skill for your agent (Claude Code, Codex, Cursor …). Alternatively copy the skill folder into .claude/skills/ or upload it in Claude.ai under Settings → Skills.
As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-official
/plugin install semgrep@semgrep-marketplace
This skill is part of the plugin “semgrep”. In Claude Code the plugin installs it together with the plugin’s other skills, commands and hooks.
What does the install-mfw skill do?
Description from the SKILL.md in the source repository.
Questions about install-mfw
What does the install-mfw skill do?
Install the mfw (Semgrep Malware Firewall) CLI via the curl|sh installer and walk the user through setup — trust store, PATH shims, shell integration, and the background daemon — asking questions at real decision points. Detects when the user's shell rc files are *managed* (symlinked into nix / home-manager / chezmoi / GNU stow / a dotfiles git repo) and, instead of clobbering them, adds mfw's source line to the right source-of-truth. Use when the user wants to install, set up, or onboard mfw on this machine.
How do I install install-mfw?
In a terminal: npx skills add semgrep/mcp-marketplace --skill install-mfw. The skills CLI asks which agents to install it for. In Claude.ai you can upload the skill folder as a ZIP under Settings → Skills.
Which agents can use install-mfw?
Skills use the open SKILL.md format, which Claude Code, Claude.ai, the Claude API, OpenAI Codex, Cursor, Gemini CLI and other agents support.
Is install-mfw safe to use?
Our automatic check found risky patterns (see “Check”). Only install it if you understand and trust what it does.
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