Install
npx skills add anthropics/claude-plugins-official --skill siege
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 math-proof@claude-plugins-official
This skill is part of the plugin “math-proof”. In Claude Code the plugin installs it together with the plugin’s other skills, commands and hooks.
What does the siege skill do?
Description from the SKILL.md in the source repository.
Questions about siege
What does the siege skill do?
No description in the SKILL.md.
How do I install siege?
In a terminal: npx skills add anthropics/claude-plugins-official --skill siege. 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 siege?
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 siege safe to use?
This skill is hosted on the vendor’s own domain and has not been checked by us yet. Read its SKILL.md before installing.
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