claim-chart

Generate pin-cited patent claim and civil element charts with gap detection.

9.1k|1.8k|Updated Apr 21, 2026
One-click install
npx skills add https://github.com/anthropics/claude-for-legal --skill claim-chart-anthropics
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: claim-chart
Source: https://github.com/anthropics/claude-for-legal/tree/main/litigation-legal/skills/claim-chart
Command: npx skills add https://github.com/anthropics/claude-for-legal --skill claim-chart-anthropics

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill builds a litigation-ready claim or element chart that maps each element/limitation to the best available target support and produces an explicit gap list for what evidence is missing.

Core Features & Use Cases

  • Patent claim charting with sub-modes: Generate element-by-element mappings for infringement, invalidity, or chart auditing against accused products, prior art, or an existing chart.
  • Civil element charting: Map cause-of-action or affirmative-defense elements against your evidence corpus and surface gaps for plausibility, MSJ readiness, and discovery planning.
  • Pin-cited, lead-focused outputs: Every cell is designed to be supported by pin-cites, with “draft—not a finding or contention” guardrails, and outputs written to the matter/practice workspace.
  • Export flexibility: Produces markdown plus tabular formats (CSV + companion sources, and Excel/Sheets) aligned to user preference.

Quick Start

Use the claim-chart skill to build a patent claim chart in infringement mode for asserted claim(s) 1 through 3 against the specified accused-product target and return a needs-evidence gap list.

Frequently Asked Questions about claim-chart

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I generate a patent infringement claim chart with element mapping?

A patent claim chart maps each element or limitation of an asserted claim to the best available support in an accused product or prior art target. It generates element-by-element mappings with pin-cites and an explicit list of missing evidence gaps.

What is civil element charting for cause-of-action mapping?

Civil element charting maps cause-of-action or affirmative-defense elements against your evidence corpus to evaluate plausibility, MSJ readiness, and discovery planning. It produces a structured chart that highlights exactly what evidence is missing for each required element.

Can I export a claim chart to CSV or Excel for spreadsheet use?

Yes, you can export claim charts to spreadsheet-friendly formats including CSV with companion sources and Excel or Google Sheets. The skill also produces markdown outputs, allowing you to align the export format with your preferred review workflow.

Does claim charting support invalidity analysis against prior art?

Yes, claim charting supports an invalidity mode that maps patent claims element-by-element against prior art references. It generates pin-cited mappings and identifies gaps in the prior art support needed to challenge claim validity.

How does gap detection work during litigation discovery planning?

Gap detection works by comparing required legal elements against your available evidence corpus and surfacing exactly what is missing. This prioritized gap list directly informs discovery planning by targeting the specific evidence needed to close plausibility or MSJ readiness holes.

Are claim chart mappings considered legal findings or contentions?

No, claim chart mappings are explicitly generated as drafts, not legal findings or contentions. The output enforces guardrails that label every cell as a draft to prevent the chart from being mistaken for a formal legal conclusion.