CBirkbeck

Beastmode — Development skill for Claude Code

Development community

Marathon work session.

How to install Beastmode

Installs to ~/.claude/skills/cbirkbeck-mathlib-quality-beastmode/SKILL.md

Terminal

mkdir -p ~/.claude/skills/cbirkbeck-mathlib-quality-beastmode && curl -fsSL https://raw.githubusercontent.com/CBirkbeck/mathlib-quality/HEAD/commands/beastmode.md -o ~/.claude/skills/cbirkbeck-mathlib-quality-beastmode/SKILL.md

Restart Claude Code, or start a new session, for it to be picked up.

What Beastmode does

name: beastmode description: Marathon work session. Pick up a ticket and stop at nothing to discharge it — fill every sorry, develop whatever API is needed, invoke /develop to plan more tickets whenever the path forks, and immediately work those tickets too. The session ends only when the target is fully proven or the work is genuinely outside the project's scope. No depth caps, no time caps, no "this is hard".

/beastmode — Marathon Work Session

What beastmode IS (read before anyt

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