Agently — Legal AI Platform

Built for the H0: Hack the Zero Stack with Vercel v0 and AWS Databases Hackathon. #H0Hackathon

Live Demo: https://agently-ten.vercel.app

Architecture

Database — Aurora DSQL

15 idempotent migrations showing:

• Matter, document, and firm data model
• Multi-tenant firm_id isolation (no RLS needed)
• OAuth token storage per firm
• Workflow runs and client intake tracking
• Custom schema design for DSQL constraints

See server/migrations/ for full schema.

Backend — Express 5 on Vercel Serverless

Core Systems:

• server/db.ts — Custom Aurora DSQL pool manager with IAM token rotation (13min TTL, 2min pre-refresh, connection deduplication)
• server/chat.ts — AI orchestration with AWS Bedrock, streaming responses
• server/action.ts — Tool-calling pipeline for file retrieval, legal research, browser control
• server/browser-router.ts — Browser agent orchestration with Steel.dev CDP and Playwright recording
• server/court-filing-router.ts — Court e-filing automation with S3-to-Steel file pipeline and Secrets Manager credential injection

Integrations:

• server/middleware/auth.ts — Clerk JWT validation, firm_id extraction
• server/file-repo.ts — S3 document management with presigned URLs
• server/matter-router.ts — Matter lifecycle management

Frontend — React 19 + Vite

• src/components/ChatView.tsx — Real-time AI chat with streaming
• src/components/BrowserView.tsx — Live browser agent control and Playwright recording UI
• src/components/MatterDashboard.tsx — Matter overview and navigation
• src/components/MatterWorkspace.tsx — Document and workflow management

Key Engineering Decisions

Aurora DSQL Integration:

• IAM token rotation with deduplication to prevent connection storms
• Firm_id scoping on every query (replaces RLS which DSQL doesn't support)
• Custom DDL migration runner for DSQL's single-statement transaction requirement

Browser Automation:

• Steel.dev for remote Chrome (not Lambda — size/timeout limits)
• AWS ECS for Python browser-use agent (can't run on Lambda)
• S3 → Buffer → Steel Files API → VM path pipeline for secure file uploads
• Playwright recording via CDP action injection

Security:

• AWS Secrets Manager for per-firm court portal credentials
• Presigned S3 URLs with 5-minute expiry
• Clerk-signed org IDs as firm_id (never from request body)

Tech Stack

• React 19, Vite, TailwindCSS
• Express 5, Node 24
• Aurora DSQL (PostgreSQL-compatible, serverless)
• AWS Bedrock (Claude inference)
• AWS S3, Secrets Manager, ECS
• Steel.dev, browser-use, Playwright
• Clerk auth, multi-tenant