Contract Compare

What it does

When your agent uses it

• A user receives a revised contract
• Redline and needs to understand what changed and who each change favors
• With /contract-compare
• Compare these two contracts

Example prompts

• “/contract-compare”
• “compare these two contracts”
• “Use the contract-compare skill to compare two contract versions side-by-side to detect added, removed, and modified clauses with favorability analysis”
• “/contract-compare”

Requirements

• Compatibility (from SKILL.md): Designed for Claude Code
• Pre-approved tools (allowed-tools): Read, Glob, Grep

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

1. 1Ingest both versions. Read each document in full. If file paths are
2. 2Establish the structural map. Create a section-by-section outline of both
3. 3Perform clause-level comparison. For each section, classify changes into
4. 4Analyze favorability. For each non-trivial change, determine
5. 5Detect dangerous patterns. Specifically scan for
6. 6Calculate the favorability balance. Tally all changes by which party
7. 7Generate the comparison report with all findings organized by section.

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Glob
  • Grep

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md.

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • commonpaper.com
  • americanbar.org
  • law.cornell.edu
  • ali.org

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Designed for Claude Code

  From compatibility in the SKILL.md frontmatter.

Context cost

Contract Compare loads about 2.1k tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 689 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~81

When it runs · the whole SKILL.md, loaded when a task matches

~2.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 689 words, ~2,063 tokens.

name

contract-compare

description

Compares two contract versions side-by-side to detect added, removed, and modified clauses with favorability analysis. Use when a user receives a revised contract or redline and needs to understand what changed and who each change favors. Trigger with "/contract-compare" or "compare these two contracts".

allowed-tools

Read, Glob, Grep

compatibility

Designed for Claude Code

version

1.1.0

author

Intent Solutions <jeremy@intentsolutions.io>

license

MIT

tags

legal, contracts, comparison, redline, negotiation, diff

# Contract Comparison Report
## Documents Compared
| | Version A (Original) | Version B (Revision) |
## Summary of Changes
| Change Type | Count |
## Change Log (by section)
| Section | Change Type | Description | Favors | Severity |
## Dangerous Pattern Alerts
## Favorability Balance
## Silent Removals
## Negotiation Strategy Recommendations
## Disclaimer

Summary: 14 changes detected across 23 sections.

Key Changes:
1. Section 5.1 (IP Assignment) [MODIFIED] — Severity: MAJOR
   Original: "Work product created under SOW is assigned to Client"
   Revision: "Work product created in connection with the engagement
   is assigned to Client"
   Favors: Client | Signal: Expanding IP scope beyond SOW deliverables

2. Section 8.3 (Liability Cap) [MODIFIED] — Severity: MAJOR
   Original: "Liability capped at 12 months of fees paid"
   Revision: "Liability capped at fees paid in the preceding 3 months"
   Favors: Vendor | Signal: 75% reduction in liability exposure

3. Section 2 (Definitions) [MODIFIED] — Severity: MAJOR
   "Confidential Information" definition expanded to include
   "business strategies and future product plans" — broadens
   confidentiality obligations without touching Section 7.

DANGEROUS PATTERN: Definition manipulation detected.
The revision altered 3 defined terms that collectively change
the meaning of 7 other clauses without modifying those clauses.

Favorability Balance: 9 changes favor Client, 4 favor Vendor, 1 Neutral
Overall Tilt: Client-favored revision

SILENT REMOVAL ALERT:
Original Section 4(d) — "Employee may terminate with 2 weeks notice
for any reason" — has been removed entirely. The revision contains
no voluntary termination provision for the employee, while the
employer retains at-will termination rights in Section 4(a).

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/.curated/contract-compare of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit cfae287