Contract Review Agent

Template. Fork it, customize it, and deploy your own contract review agent.

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Open-source contract review agent template built on Vercel's Eve — the filesystem-first framework for durable AI agents. Upload a PDF or DOCX contract, watch the Eve agent stream a tool-call review, and walk away with a risk report you can act on before signing.

Eve is the same framework Vercel uses to run its own agents (vercel.com/eve). This template is what you ship when you need a vertical/legal agent: instructions in Markdown, tools in TypeScript, durable sessions by default, deploy with one click.

Why this template

Need	Template answer
Vercel Eve starter	✅ Two-service vercel.json (web + eve), Next.js app + Eve runtime
AI contract review	✅ Risk report, missing clauses, negotiation points — streamed
Real file parsing	✅ PDF (pdf-parse) and DOCX (mammoth), text only, not persisted
Visible agent reasoning	✅ Streaming tool calls rendered in the UI, not a black-box
Follow-up chat	✅ Floating prompt input resumes the same Eve session
Production-shaped	✅ Anthropic model, evals scaffold, type-safe tools

See it in action

A real Eve session — numbered negotiation points (raw-material cap, force majeure, power of entry, coupon pricing, insurance, contract blanks), a Signing Tradeoffs section, and a follow-up prompt that resumes the same session. The reminder chip at the bottom tracks unresolved items across the durable conversation.

Features

PDF & DOCX Contract Uploads

Upload real PDF and DOCX contracts from the web app. Files are parsed per request and are not persisted by the template — each review starts from a clean slate.

Streaming Agent Review with Tool Calls

The Eve agent streams its review with visible tool calls (build_contract_review_state, review_contract_text, review_clause_dual, evaluate_contract_risk_dimensions, route_contract_revision), so users see the methodology instead of getting a static black-box report.

Risk Report

Every review focuses on plain-English summary, business risks, missing or unclear clauses, unusual terms, and suggested negotiation points — never a signing recommendation.

Contract Review Methodology

The agent uses validity-first gates, clause coverage checks, consistency review, six risk dimensions, and revision routing adapted from Contract Review Pro. See agent/skills/contract-review-methodology.md.

Follow-up Chat

After the first review, keep chatting with the same Eve session from a floating prompt input. Durable sessions survive refreshes, deploys, and long pauses.

Architecture

PDF / DOCX upload
        │
        ▼
Next.js upload API
        │
        ▼
PDF / DOCX parser
        │
        ▼
Eve agent session  ─────────────►  contract-review skill
        │                              ├─ build_contract_review_state
        │                              ├─ review_contract_text
        │                              ├─ review_clause_dual
        │                              ├─ evaluate_contract_risk_dimensions
        │                              └─ route_contract_revision
        ▼
Streaming risk report  +  follow-up chat

On Vercel, vercel.json defines two services: web for the Next.js app and eve for the Eve agent runtime.

Quick Start

Requirements: Node.js 24+, npm

Deploy to Vercel

Self-hosting

git clone https://github.com/Nainish-Rai/contract-review-agent.git
cd contract-review-agent

npm install
cp .env.example .env.local
npm run dev

Open the local URL printed by Next.js and upload a .pdf or .docx contract.

Required environment variables:

ANTHROPIC_API_KEY=...

Optional:

ANTHROPIC_MODEL=claude-sonnet-4.6

Customization

• Change agent/instructions.md to adjust the agent identity and guardrails.
• Edit agent/skills/contract-review-methodology.md to tune the review workflow.
• Add or change tools in agent/tools/ for new review checks.
• Update lib/contract-review/review.ts for deterministic risk rules.
• Adjust app/_components/contract-review-app.tsx for the upload and review UI.
• Rename in lib/site.ts (siteName, siteDescription) and app/layout.tsx metadata to rebrand as your own agent.

Development

npm run dev        # Start Next.js with Eve
npm run typecheck  # TypeScript check
npm run build      # Production build

See AGENTS.md for notes aimed at AI coding assistants, and CONTEXT.md for the project's domain language.

Built With

• Eve — Vercel's filesystem-first framework for durable AI agents
• Next.js — React framework
• AI SDK Elements — Agent UI primitives (streaming tool calls)
• shadcn/ui — UI component patterns
• pdf-parse — PDF text extraction
• Mammoth — DOCX text extraction
• Vercel — One-click deploy, Workflows, Sandbox, AI Gateway

Templates in the Vercel Eve series

• vercel-labs/personal-agent-template — durable personal AI agent with web chat, Slack, Linear, memory
• vercel-labs/eve-chat-template — persisted Next.js chat template for Eve
• vercel-labs/eve-slack-agent-template — starter Slack bot built on Eve
• This repo — vertical/legal contract review agent template

Legal Disclaimer

This template surfaces practical contract-review issues. It is not legal advice and should not be treated as a signing recommendation.

License

MIT