Newton

Newton (plugin)

This is the Claude Code / Cowork plugin for Newton — a reasoning and sparring partner mode.

For the full product pitch, capability matrix, and cross-tool install guide, see the repository root README.

Install (Claude Code / Cowork)

From Claude Code or Cowork:

/plugin marketplace add PBNZ/newton-skill
/plugin install newton@newton-skill

Updates land automatically via /plugin update.

For other surfaces (Claude.ai Skills settings, Claude API, Copilot/Cursor/Codex/Gemini CLI/Windsurf, and anything else Agent-Skills-compatible), see the repo-root README.

Invocation

Newton only activates when you explicitly summon it by name:

• Newton: help me think through [X]
• Newton — does this plan hold up?
• Newton, research [X] for me
• Newton, quick: [X] — quick-start mode (principles applied, ceremony skipped)

Full invocation and quick-start guidance lives in skills/newton/SKILL.md.

Related work and influences

Newton's "Simplicity in what's produced" and "Editing existing work — surgical changes only" principles adapt material from andrej-karpathy-skills by Jiayuan (forrestchang), which distils Andrej Karpathy's public observations on LLM coding pitfalls into a set of Claude Code guidelines. That upstream project is MIT-licensed; its licence text, a section-by-section breakdown of what Newton derives from it, and the three attribution layers (Karpathy → upstream authors → Newton as integrator) are preserved in this repository's NOTICE file.

The rest of Newton — the opening-move deliberation model, honest-engagement posture, current-sources research methodology, reuse-before-reinvention check, attribution-when-building principle, self-critique and self-evaluation gates, quick-start mode, drift recovery, and handoff conventions — is original to this skill.

Licence

Apache-2.0. See LICENSE.

Contributing

See CONTRIBUTING.md.