Agent skill and plugin
The MCP server gives your agent the tools. The skill teaches it how to use them: the order of the loop, how to read evidence grades, how to turn a tactic's acceptance criteria into tests, and what it must never claim. The skill is free and MIT-licensed; audits still need an API key, and the free plan is enough to try it.
What the package contains
| Path | What it is |
|---|---|
skills/liftwire/SKILL.md | The skill itself |
skills/liftwire/prompts/ | Walkthroughs for a pricing page, a signup flow and a whole site |
skills/liftwire/rulebook.md | Published tactic names and mechanisms, for when no key is connected |
.claude-plugin/plugin.json, .mcp.json | The Claude Code plugin: the skill plus the MCP server |
cursor/rules.mdc | A Cursor project rule with the loop |
codex/AGENTS.snippet.md | A section to append to your project's AGENTS.md for Codex |
windsurf/mcp_config.json | Windsurf MCP config |
Claude Code
The package is a plugin and a one-plugin marketplace. Add it from a local copy or from the repository it is published in, then install it:
claude plugin marketplace add <path-or-github-repo>
claude plugin install liftwire@liftwire
The plugin connects the MCP server for you and reads your key from the LIFTWIRE_API_KEY environment variable, so export it before you start Claude Code. Without the plugin, connect the server with the Claude Code snippet in Getting started and copy skills/liftwire into ~/.claude/skills/.
Cursor, Codex and Windsurf
These agents do not load Claude Code plugins. Connect the server with the snippets in Getting started, then:
- Cursor: copy
cursor/rules.mdcto.cursor/rules/liftwire.mdcin your project. - Codex: append
codex/AGENTS.snippet.mdto your project'sAGENTS.md. - Windsurf: the server config is in
windsurf/mcp_config.json; the loop is described in the server's own instructions and prompts.
Without a key
If the MCP server is not connected, the skill falls back to rulebook.md, which lists published tactics by name, grade and mechanism only. It is regenerated from the published library and may be empty while the library is in build; the skill tells the agent to say so rather than invent tactics.
What the skill tells your agent never to claim
The skill repeats the rule on evidence grades: no numeric result for any tactic unless it is graded measured, no promises for your site, and no claim that a change worked until verify_change has checked the live page.