amendment-history

Trace contract amendments across base agreements and revisions with section references.

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

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Amendment history is hard to reconstruct when multiple revisions exist and nobody can quickly tell what changed and what language now controls.

Core Features & Use Cases

  • Chronological amendment tracking: Reads a base agreement and all amendments/addenda in sequence to build a time-ordered change record.
  • Two analysis modes: Produces either a full cross-contract summary of changes over time or a provision-specific trace that quotes prior and current language.
  • Section-anchored outputs: Includes inline section references for every finding so the reviewer can verify in the source documents.
  • Watch-item flagging: Highlights inconsistencies (e.g., conflicting edits, shifted section numbering, party-name changes) with section references.

Quick Start

Run amendment-history on your uploaded base agreement plus amendment files, and ask whether you want the full amendment summary or a clause-specific trace.

Frequently Asked Questions about amendment-history

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

FAQPage Schema
How do I track contract amendments across multiple versions of an agreement?

To trace contract amendments across multiple versions, this Skill reads a base agreement and subsequent revisions in chronological order, parsing modified, added, or deleted provisions to build a time-ordered change record. It produces a cross-contract summary or a provision-specific trace quoting exact text.

Can I trace the history of a specific clause through contract revisions?

Yes, you can trace a specific clause by using provision trace mode. This mode quotes prior and current language for a named clause across uploaded contract revisions, providing exact text with inline section references so you can verify which language controls now.

What is the best way to find out which contract language controls after several addenda?

Finding which contract language controls after several addenda requires chronological amendment tracking. The Skill sequences a base agreement and addenda to show what changed, flags inconsistencies like conflicting edits or shifted section numbering, and identifies the latest controlling language with section-anchored references.

How do I get a summary of changes across all contract revisions?

To get a summary of changes across contract revisions, use summary mode. This mode reads a base agreement and subsequent amendments in sequence to produce a full cross-contract overview of modifications over time, highlighting inconsistencies with inline section references for reviewer verification.

Does amendment history analysis flag inconsistent section numbering or party-name changes?

Yes, amendment history analysis includes watch-item flagging that highlights inconsistencies such as conflicting edits, shifted section numbering, and party-name changes. Every flagged item includes inline section references so reviewers can quickly locate and verify issues in source documents.

What do I need to reconstruct an amendment history for a legal workflow?

To reconstruct an amendment history for a legal workflow, upload a base agreement and its subsequent amendment or addenda files. Once uploaded, request either a full amendment summary or a clause-specific trace to generate a time-ordered change record with section-anchored outputs.